320d-336d Excavator Intro r4a3h
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SERV1852-02 August 2008
GLOBAL SERVICE LEARNING TECHNICAL PRESENTATION
320D -336D HYDRAULIC EXCAVATORS TIER III ENGINES INTRODUCTION
Service Training Meeting Guide (STMG)
320D -336D HYDRAULIC EXCAVATORS TIER III ENGINES INTRODUCTION ((320D - 336D) AUDIENCE Level II - Service personnel who understand the principles of machine systems operation, diagnostic equipment, and procedures for testing and adjusting.
CONTENT This presentation provides an introduction and machine walkaround for the 320D-336D Hydraulic Excavator. Additional presentations will cover the engines, pilot system, pumps and controls, main control valve group, swing system, travel system, and tool control systems in more detail. This presentation may be used for self-paced and self-directed training.
OBJECTIVES After learning the information in this presentation, the technician will be able to: 1. identify the major components and controls of a 320D-336D Hydraulic Excavator, and 2. perform a machine walkaround inspection and daily maintenance.
REFERENCES 320D Hydraulic Excavator Specalog 323D L and 323D LN Hydraulic Excavators 324D Hydraulic Excavator Specalog 325D Hydraulic Excavator Specalog 328D Hydraulic Excavator Specalog 330D Hydraulic Excavator Specalog Machine Monitoring System - Systems Operation Self-study "300D Series Hydraulic Excavators, 345C Hydraulic Excavator, and 365C & 385C Large Hydraulic Excavators iTIM " '300C' Series Hydraulic Excavators-Electronic Control Systems" iTIM "325C Hydraulic Excavators-Hydraulic Systems" 325D Hydraulic Schematic
Estimated Time: 1 Hour Illustrations: 41 Form: SERV1852-02 Date: August 2008 © 2008 Caterpillar
AEHQ5856 HEHH3327 AEHQ5663 AEHQ5665 AEHQ5706 AEHQ5667 RENR8068 SERV7032 SERV2693 SERV2701 KENR6157
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TABLE OF CONTENTS INTRODUCTION ........................................................................................................................5 MACHINE WALK-AROUND...................................................................................................14 325D Hydraulic Excavator ...................................................................................................16 330D Hydraulic Excavator ...................................................................................................25 OPERATOR STATION ..............................................................................................................33 CONCLUSION...........................................................................................................................48
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PREREQUISITES "Fundamentals of Mobile Hydraulics Self Study Course" "Fundamentals of Power Train Self Study Course" "Fundamentals of Electrical Systems Self Study Course" "Fundamentals of Engines Self Study Course"
TEMV3002 TEMV3003 TEMV3004 TEMV3001
NOTES Nomenclature Change: During the fourth quarter of 2008, the 325D and 330D nomenclature changed. The 325D became the 329D and the 330D became the 336D for most arrangements. The exceptions are as follows: - The nomenclature for the 325D MH and 330D MH did not change. - The nomenclature for the 325D FM and 330D FM did not change. - The 325D HD HW did not change into 329D HD HW. This model is being discontinued. However, the 330D HD HW changed to the 336D HD HW.
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320D-336D EXCAVATORS - TIER III ENGINES INTRODUCTION AND SYSTEMS OPERATION (320D - 330D)
© 2008 Caterpillar
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INTRODUCTION The Caterpillar 320D-336D range of Hydraulic Excavators incorporate design innovations and performance improvements from the 300C Hydraulic Excavator Series and are a direct replacement for them. The range comprises of: 320D, 321D, 323D, 324D, 325D, 328D, & 330D, with some models having various additional machine arrangements. During the fourth quarter of of 2008, the 329D replaced the 325D and the 336D replaced the 330D for most arrangements. The machines feature a new cab for greater operator comfort. The cab provides the operator with excellent visibility of processing equipment, trucks, and railcars. The cab, consoles, and joysticks have been improved to provide a better access and understanding of all functions. This presentation discusses the systems operation of the 320D-336D Hydraulic Excavators, along with basic engine and machine component location. NOTE: Most of the illustrations of the iron in this presentation will be of the 325D and 330D excavators. The other models will be configured similarly, but component locations may be different. Some of the illustrations may show pilot iron instead of production iron. The most significant differences will be related to the engine compartment due to the three different engines being used in this series of machines as well as two of the models being compact radius (CR).
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300D SERIES HYDRAULIC EXCAVATORS Model Engine
Configurations Available
320D
C6.4
L, LN, FM, MH, RR, L RR, LL
321D
C6.4
CR, LCR
323D
C6.4
L, LN, S, SA
324D
C7
L, LN, FM
325D/329D
C7
L, LN, FM, MH, L MH, UHD, L HW, L HD
328D
C7
LCR
330D/336D
C9
L, LN, FM, MH, WH, L HD, L RE, U HD, L HW
During the fourth quarter of 2008, the 325D became the 300D and the 330D became the 336D for most machine configurations. The 325D MH and 330D MH did not change. The 325D FM and 330D FM did not change. The 325D HD HW was discontinued.
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The 320D-336D Hydraulic Excavators cover the 20 to 36 metric ton class of excavators and are extremely versatile machines capable of performing a wide range of tasks by utilizing the various work tools available. For the "D" Series models shown, they are all equipped with ACERTTM Tier III engines. NOTE: Some of the "D" Series excavators arrangements are built using Tier II engines to better meet market needs in certain parts of the world. The machines can be configured with a wide range of undercarriages including standard, long (L) and long and narrow width (LN). For some models additional letters are included in the nomenclature, for example: forest machine (FM), material handler (MH), heavy duty (HD), and waste handling (WH) to designate the machine application. The 321D and 328D are only available as compact radius (CR) machines. As mentioned, during the fourth quarter of 2008, the 325D and 330D nomenclature changed to the 329D and 336D respectively. The reason for the change was to better align the machine nomenclature with the actual machine weight. Making this change should lead to increased machine sales.
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The exceptions to this nomenclature change are as follows: - The nomenclature for the 325D MH and 330D MH did not change. - The nomenclature for the 325D FM and 330D FM also did not change. - The 325D HD HW did not change into 329D HD HW. This model is being discontinued. However, the 330D HD HW changed to the 336D HD HW.
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The 320D, 325D, and 330D can be configured as a material handler (MH). A fixed cab riser, or as shown here, a hydraulic cab riser is available. The cab riser provides different operating heights with excellent visibility for loading and unloading processing equipment, trucks, and rail cars. The 321D CR and 328D LCR are compact radius (CR) machines. With CR machines, the machine tailswing is within the width of the undercarriage (depending on track width).
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SIMILARITIES AND DIFFERENCES FEATURES
DIFFERENT
Machine Appearance
SIMILAR X
Operator s Station
X
Engine
X
Implement Hydraulic System Monitoring System
SAME
X X
Maintenance Items
X
Tool Control Systems
X
Machine ECM
X
Travel System
X
Undercarriage
X
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This chart displays some the similarities and differences between the 300D Series and the 300C Series hydraulic excavators. New and improved features include: Operator's Station: The layout of the interior has been redesigned to maximize operator comfort and reduce operator fatigue. Frequently used switches have been relocated for easier access. The consoles and armrests have been redesigned for better comfort and adjustability. More seat options are available: the standard mechanical suspension seat, or the optional air suspension seat with heater. Engine: The "D" Series machines are equipped with Tier III ACERTTM engines. The C6.4 engine is used in the 320D, 321D, and 323D. The C7 engine is used in the 324D, 325D/329D, and the 328D. The C9 engine is used in the 330D/336D. Monitor: The monitor is a full color Liquid Crystal Display that provides vital operating and performance information, which is all in a simple, easy to navigate format. Tool Control: The tool control systems for the 300D are similar in function as the tool control systems for the 320C - 330C medium excavators, although the medium pressure circuit is now a stand-alone function.
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The SmartBoom™ attachment enhances operation of the boom function and significantly reduces cycle times of the machine. The SmartBoom™ is essentially a boom float attachment, which allows the operator to lower the boom under its own weight or for the boom to raise up due to stick force. Service and maintenance intervals have been extended to reduce machine service time and increase machine availability. Options include the following: The Machine Security System (MSS): This system uses a special Caterpillar key with an embedded electronic chip for controlling unauthorized machine operation. Product Link: This option provides all kinds of information and working parameters through a satellite connection between an on-board computer and the machine. Product Link provides easier fleet management and improved preventive maintenance. PL121 and PL321 are both available. AccuGrade: This option provides precise control of the work tool using special software. Auxiliary Hydraulic Options: This option allows the machine to be configured to meet the work tool needs, while increasing its versatility. - Single Function Circuit is suited for tools that require one-way flow with one or both pumps, such as hammers and vibratory plate compactors. - Double Function Circuit is suited for tools that require two-way flow, utilizing one or two pump flows, such as thumbs, non-rotation grapples, or shears.
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MAIN HYDRAULIC SYSTEM Stick Cylinder Bucket Cylinder Swing Motor
Main Control Valve Group
Pilot Control Valves
Priority Valves
Pilot Manifold
Pilot Pump Fan Motor
Boom Cylinders
Travel Motors
Main Hydraulic Pumps
M Fan Pump
Tank
The Fan Motor and Pump are only Used on the 330D and 336D
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For the most part the main implement hydraulic system operation for the 320D-336D is the same as the 300C Series. The "D" Series continues using many of the "C "excavator features, such as automatic priorities and tool control systems. The machines use a negative flow (NFC) hydraulic system. The main control valve group and pumps are similar to the "C" Series. Each of the models may have the components located in different locations due to the size of the machine or the type of carbody. The 330D/336D is equipped with a new main hydraulic pump design and is the only model equipped with a hydraulic demand fan system. The smaller machines can be equipped with an optional visconic demand fan if needed for working in areas with high ambient temperatures.
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7 The optional tool control system maximizes work tool productivity by configuring hydraulic flow, pressure, and operator controls to match a specific work tool. System versatility enables a wide range of tools to be used. The system stores pressure and flow information for up to ten tools. Selectable Cat tools have preset flows and pressures. The 300D excavators produced in Akashi and Aurora (for the North American Commercial Division (NACD) can be equipped with the following factory installed tool control systems: - System 3 (Hammer) - provides two pump flow in a single direction only. This system also includes a mechanical line relief valve for tools requiring lower pressure settings (single action). - System 5 (Thumb) - provides one pump flow in both directions (extend/retract double action) and can be controlled with a foot pedal or a joystick. - System 14 (Multifunction) - provides one or two pump flow in one or two directions (single action or double action). System 14 has full electronic controls. An optional, independent medium pressure circuit is used for such applications as a rotating shear or ditch cleaning bucket. The System 14 functions are now controlled through the Machine ECM. A separate Tool Control ECM as was used on the 300C Series is not needed.
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The machines produced in Akashi and Gosselies for the EAME market will have the following factory installed optional tool control systems: - System 16 - provides two pump flow in a single direction, has a direct return system to the hydraulic tank, and includes a mechanical for tools requiring lower pressure settings (single action). - System 17 (Multifunction) - provides one or two pump flow in one or two directions (single action or double action). System 17 has a direct return system to the hydraulic tank, instead of the oil returning through the main control valve group. System 17 has full electronic controls. An independent medium pressure circuit is available with System 17 to use for applications such as a rotating shear or a ditch cleaning bucket.
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MACHINE WALK-AROUND The 300D Series track excavators have been designed for fast, easy service with extended service intervals, advanced filtration, convenient filter access, and -friendly electronic diagnostics for increased productivity and reduced maintenance costs. The hydraulic system and component locations have been designed to provide a high level of system efficiency. The main pumps, control valves, and hydraulic tank are located close together to allow for shorter tubes and lines between components which reduces friction loss and pressure drops in the lines. This design reduces engine compartment heat and sound being transmitted to the operator. Components shown include: - stick (1) - boom (2) - operator station (3) - access door to air cleaner and battery compartment (4) - engine access cover (5) - access door to radiator compartment (6) - counterweight (7)
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This illustration shows the major components and service areas on the machine. NOTE: The 325D and 330D will be used on the following pages to show components and their locations on the 300D Series excavators. These locations may vary between the other models. The locations and components used on the 320D, 321D, 323D, 324D and 328D will be more similar to the 325D/329D than the 330D/336D.
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325D/329D Hydraulic Excavator This illustration shows access to the top of the machine from the right side. The engine access cover (1) allows access to the engine from the top of the machine. The machine hydraulic oil tank (2) is located between the pump compartment and the diesel fuel tank on the right side of the machine and is accessed from the top of the machine. The diesel fuel filler cap (3) is accessed from the top of the machine. The storage compartment (4) is located in the front of the machine. The step and hand rail (5) at the right front of the machine can be used for access to the top of the machine.
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The compartment behind the operator station includes the following components: - Machine ECM (1) - air conditioning condenser and receiver (2) - master disconnect switch and circuit breakers (3) - dual element, radial seal air filter (4) - batteries (5) - engine shutoff switch (6) (on machines with a cab riser) The Machine ECM also includes software for the Tool Control System. NOTE: The machine used in this illustration is equipped with a cab riser. On most machines a window washer solvent reservoir would be shown behind the master disconnect switch and circuit breakers.
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The radiator access compartment is located in front of the counterweight. The door is hinged on the right and has a locking latch on the left side to keep it closed. This door provides access to assist in cleaning some of the cooling system components: - Air to Air After Cooler (ATAAC) (1) - manual cab lowering valve (2) (only for machines with cab risers) - hydraulic oil cooler (3) - fuel priming pump (4) (will be changed to electric priming pump) - fuel filter (5) - fuel sensors (6) (temperature and pressure) - fuel water separator (7) - engine coolant overflow bottle (8) - radiator (located behind the water separator and coolant overflow bottle) (9) - left compartment release lever (access to batteries and air filter) (10) - joystick pattern change valve (not shown) is located on compartment floor
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The illustration shows the pump compartment on the right side of the machine. The compartment is accessed from the right side of the machine when the rear access door is open. Some of the visible components are: - engine oil filter (1) - pilot pump (2) - medium pressure circuit pump (3) - drive pump (4) - idler pump (5) - pilot filter (6) - case drain filter (7) - hydraulic system return oil filter (8) - pressure taps for auxiliary tool solenoids (9) - solenoids for the medium pressure circuits (10)
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The 320D-336D pilot manifold is the same as the 300C Series pilot manifold. The pilot manifold is accessible by removing the cover plate under the machine, behind the swing bearing. The manifold is located directly below the main control valve. Pilot manifold components visible are: - two-speed travel solenoid (1) - swing brake solenoid (2) - hydraulic activation valve (3) - hydraulic activation solenoid (4)
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The main control valve group is located in the center of the upper structure of the machine. The main control valve group receives pilot oil signals from the operator controls in the cab. Each pilot signal then causes the appropriate control valve to shift. When a control valve shifts, oil flows from the main hydraulic pumps to the appropriate hydraulic cylinder or hydraulic motor to perform work. The 300D main control valve group is similar to the 300C main control valve group. The valves are: - right side NFC relief valve (1)
- dual stage main relief valve (8)
- stick 2 (2)
- left travel (9)
- boom 1 (3)
- swing (10)
- bucket (4)
- stick 1 (11)
- attachment (5)
- boom 2 (12)
- right travel (6)
- auxiliary valve for Tool Control (13)
- straight travel valve (7)
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The single 325D/329D swing motor (1) receives oil from the swing control valve. The swing control valve receives hydraulic pump oil from the left pump. The swing drive oil level can be checked with dipstick (2). The travel motors (not shown) drive the outboard, planetary-type final drives (3). A wide range of undercarriage (4) options are available to meet the needs of the machine application.
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The 325D/329D (324D and 328D also) is equipped with a C7 ACERT™ Engine (1). Also visible are: - the engine crankcase breather (2) - engine oil level gage (3) - S•O•S coolant sampling valve (4) - engine oil fill cap (5) - inlet air heater (6) NOTE: The 320D, 321D, and 323D engine compartment will be slightly different due to the use of the C6.4 engine.
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The engine cooling fan (arrow) on the 325D/329D is mechanically driven off the front of the engine. An electrically controlled viscous clutch fan is available as an attachment to reduce fan noise on the 320D - 329D. The optimum fan speed is calculated based on the target engine speed, coolant temperature, hydraulic oil temperature, and actual fan speed. When fan speed is reduced, there is more engine horespower available for other functions and less fuel is burned. NOTE: The 330D uses a hydraulic demand fan.
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330D/336D Hydraulic Excavator This illustration shows access to the top of the machine from the right side. The engine access cover (1) allows access to the engine from the top of the machine. The hydraulic tank (2) is located between the pump compartment and the diesel fuel tank on the right side of the machine and is accessed from the top of the machine. The diesel fuel filler cap (3) is accessed from the top of the machine. A boom lowering check valve (4) (if equipped) is mounted on each boom cylinder. The storage compartment (5) is located in the front of the machine. The step and hand rail (6) at the right front of the machine can be used for access to the top of the machine.
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The air cleaner and battery compartment includes the following components: - Machine ECM (1) - air conditioning condenser and receiver (2) - window washer solvent reservoir (3) - master disconnect switch and circuit breakers (4) - dual element, radial seal air filter (5) - ether start aid solenoid (6) - batteries (7)
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The radiator access compartment is located in front of the counterweight. The door is hinged on the right and has a locking latch on the left side to keep it closed. This door provides access for cleaning some of the cooling system components and servicing some of the fuel system and cooling system components. The following components are called out in the illustration above: - hydraulic oil cooler (1) - fuel pressure sensors (2) - switch for electric fuel priming pump (3) - electric fuel priming pump (4) - fuel filter (5) - Air to Air After Cooler (ATAAC) (6) - radiator (7) - engine coolant overflow bottle (8) - fuel water separator (9) A joystick pattern change valve if equipped (not shown) is located on this compartment.
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The illustration shows the pump compartment on the right side of the machine. Some of the visible components are: - quick coupler solenoid valve (1)
- pilot pump (7)
- engine oil filter (2)
- pilot filter (8)
- fan pump (3)
- drive (right) pump (9)
- medium pressure circuit pump (4)
- idler (left) pump (10)
- medium pressure solenoids (5)
- case drain filter (11)
- pressure taps for auxiliary tool solenoids (6)
- hydraulic system return oil filter (12)
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The main control valve group is located in the center of the upper structure of the machine. The main control valve group receives pilot oil signals from the operator controls in the cab. Each pilot signal then causes the appropriate control valve to shift. When a control valve shifts, oil flows from the main hydraulic pumps to the appropriate hydraulic cylinder or hydraulic motor to perform work. The 330D/336D main control valve group is similar to the 330C main control valve group. The components shown include the: - right side NFC relief valve (1)
- dual stage main relief valve (8)
- stick 2 (2)
- left travel (9)
- boom 1 (3)
- swing (10)
- bucket (4)
- stick 1 (11)
- attachment (5)
- boom 2 (12)
- right travel (6)
- auxiliary valve for tool control (13)
- straight travel valve (7)
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The single 330D/336D swing motor (1) receives oil from the swing control valve. The swing control valve receives pump oil from the left pump. Additional swing motor components shown are: - swing brake release pressure line (2) - swing drive oil level dipstick (3) - fine swing solenoid harness (4) - swing crossover relief valves (5)
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The 330D/336D is equipped with a C9 ACERT™ Engine (1). The engine is rated at 200 kW (268 hp) at 1800 rpm. ACERT™ Technology offers better fuel economy and reduced wear. Also visible in the photo are the: - engine oil dipstick (2) - inlet air heater (3) - engine oil fill (4) - S•O•S coolant sampling valve (5)
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The 330D/336D engine fan (1) is hydraulically driven by a fixed displacement motor (2). The fan motor is supplied oil from the fan pump. Fan speed is varied to provide optimized cooling. The optimum fan speed is calculated using engine coolant temperature and hydraulic oil temperature. The direction of the engine fan can be reversed on machines equipped with the reversible fan option. The fan motor rotation can be changed with the monitor. The reversal of the fan motor is used to clear debris and dust from the radiator and hydraulic oil cooler. NOTE: Operation of the hydraulic fan system will be covered in more detail later.
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OPERATOR STATION The 320D-336D hydraulic excavator operator station has an updated look with a new color scheme. The cab post and rear of the cab have been changed to black while the counterweight design has been changed with an enlarged CAT® decal and distinctive styling. The newly designed cab features improved visibility and operator comfort. Conveniently placed switches, gages, information display, and controls improve operator comfort, awareness, and efficiency. Frequently used switches have been relocated to improve accessibility. A full color Liquid Crystal Display monitor provides vital operating and performance information, alerts in text, in a simple, easy to navigate format. The monitor provides increased functionality for the operator. For operator comfort, the new cab offers a fully adjustable air suspended seat with side-to-side shock absorption, which provides maximum operator comfort. The fuse has been moved to the left side of the lunch box compartment and behind the operator's seat for easy access. A 24-volt AM/FM radio, mounted in the right console, is standard.
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Controls in the cab include the: - left (1) and right (2) travel pedals - left (3) and right (4) travel pedal levers - straight travel pedal (5) (attachment) - right joystick (6) to control the bucket and boom (SAE excavator pattern) - left joystick (7) to control the swing and stick (SAE excavator pattern) The switch for one-touch low idle (AEC) is on the right joystick. The left joystick includes the horn switch. If the machine is equipped with a magnet, the trigger switch on the front of the right joystick turns the magnet on, while the trigger switch on the front of the left joystick turns the magnet off. The service hour meter (8) can be seen to the left of the attachment pedal.
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The hydraulic activation lever (1) has been redesigned, however, the lever serves the same purpose as before. With the lever in the down position (shown), the hydraulic activation solenoid is in the de-activated position. No hydraulic functions are available with the lever in the down position. When the lever is moved to the up position the hydraulic activation solenoid is energized and pilot oil is available to operate the joysticks. The ground level emergency engine shutoff switch (2) is located on the bottom of the seat mount. The shutoff switch will shut off the engine without having to climb into the cab. Once the shutoff switch is turned ON and then OFF, the key start switch must be cycled for the machine to operate again.
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All of the operator functions are incorporated into the right side of the operator's station. The functions are: - engine speed dial switch (1) - key start switch (2) - cigarette lighter (3) - soft switch (4) - rocker switches (5) - HVAC controls (6) - radio (7)
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The soft switch includes switches that either turn a function ON/OFF or allows the operator to toggle through different modes of the selected function. The soft switches provide the operator with the following functions: Two-speed travel switch (1): When the button is pushed the travel speed is toggled between low and auto. - The rabbit indicator indicates auto speed. - The tortoise indicator indicates low speed. Automatic Engine Control (AEC) switch (2): The AEC function automatically reduces engine speed while there is no hydraulic demand, which reduces noise and fuel consumption. - The AEC switch disables and enables the AEC function. - Initially, AEC reduces the engine speed by 100 rpm after there has been no hydraulic demand for approximately three seconds. - Then AEC reduces the engine rpm to approximately 1300 rpm after there has been no hydraulic demand for an additional three seconds. - The additional three second AEC delay time and the low speed of 1300 rpm can be changed using the monitor or Caterpillar Electronic Technician (Cat ET).
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Travel alarm cancel switch (3): The travel alarm cancel switch is a momentary two-position switch. - The travel alarm sounds when travel is detected. - The travel alarm stops immediately if the travel alarm cancel switch is depressed. - The travel alarm switch is reset every time the travel pressure switch opens. Work tool switch (4): The work tool switch will show the selected work tool on the monitor display. Press the switch repeatedly to change the selected work tool. When the desired work tool is highlighted in the monitor display press the "OK" button on the monitor to select the work tool shown. Work lights switch (5): The work lights switch toggles between the different work light combinations. Two different work light patterns are available. - Pattern 1: Chassis work lights and cab work lights. - Pattern 2: Chassis work lights, cab work lights, and boom work lights. Upper window wipers switch(6): The wiper switch toggles between the following different modes of the wipers. - six second delay. - three second delay. - continuous operation. - off Upper window washer switch(7): The windshield washer fluid switch is an ON/OFF switch. Heavy lift mode switch (8): The Heavy lift mode switch can be selected to increase lifting capability and provide improved controlability of heavy loads. - When heavy lift is turned on, the main relief valve maximum pressure increases from 35,000 MPa (5080 psi) to 36,000 MPa (5225 psi), making it possible to operate the system at a higher pressure. - In Heavy Lift Mode, the maximum engine speed is limited to engine speed dial 6 (1510 ± 90 rpm). - Hydraulic horsepower maximum output is reduced to 60%.
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The toggle and rocker switch contains switches that control additional functions: Quick coupler lock control switch (1): The quick coupler lock control switch is a spring centered toggle switch. - The top position locks the quick coupler. - The bottom position unlocks the quick coupler. Fine swing control switch(2): The fine swing control switch is a two-position rocker switch. - The top position activates fine swing control. Fine swing control improves the swing control during swing deceleration. - The bottom position deactivates fine swing control. Rear window washer switch (3): The rear window washer fluid switch is a two-position rocker switch. - The top position activates the windshield washer fluid. - The bottom position deactivates the windshield washer fluid. Rear window wiper (4): The rear window wiper switch is a two-position rocker switch. - The top position activates the wiper. - The bottom position deactivates the wiper.
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9 8
4 1
2
3
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The heating and air conditioning system (HVAC) is electronically controlled. The control for the heating and air conditioning system is located on the right console. The switches on the control are: ON/OFF switch (1): Push the ON/OFF switch in order to power on the system. Push the switch again in order to power off the system. Automatic control switch (2): In order to enter the full "AUT" Mode for automatic climate control, push this switch. However, if the switch is pushed again, the air conditioning can not be turned off using this switch. When the system is in full "AUT" Mode, specific functions can be manually changed by pushing another switch. If a specific function is manually changed, "AUT" will not appear in the display, but the unchanged functions will remain in "AUT" mode. In order to take advantage of the full "AUT" setting of the climate control system, always keep the sunlight sensor clean. Do not obstruct the sunlight sensor. If the climate control system is in the full "AUT" setting at engine start-up and the temperature inside the cab is too warm or too cool, the damper for fresh air ventilation may automatically close for a few minutes. This action will help to bring the air temperature to the preset temperature more quickly. NOTE: "AUT" represents "auto".
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Text Reference Introduction
Temperature switch (3): This switch controls the temperature of the air entering from the air outlets in order to achieve the preset temperature. The preset temperature appears on display. If the heating and air conditioning system is in the automatic mode, pushing these switches changes the preset temperature. LCD (4): The displays the settings of the HVAC system. Fan switch (5): The fan switch directly controls the fan speed. If the climate control system is operating in the automatic mode, pushing this switch overrides the automatically selected fan speed. Compressor switch (6): Push the switch in order to turn on the compressor or push the switch in order to turn off the compressor. In humid conditions, the compressor may be used to remove moisture from the air in the cab. In cool weather, operate the compressor weekly in order to prevent leakage of the refrigerant gas and to help maintain the compressor in optimum working order. Defrost mode switch (7): Depressing this switch will defog the windows. The air will also be dehumidified while the compressor is running. Air inlet select switch (8): This switch selects the position of the air inlet for recirculation or for fresh air. Air outlet select switch (9): This switch selects the position of each air outlet. Each switch controls a different air outlet. - upper body switch - upper body and floor switch - floor switch - floor and defroster switch NOTE: In order to convert the temperature reading from Degrees Celsius to Degrees Fahrenheit, depress both keys of the fan switch at the same time for five seconds. This same action is used for converting the temperature reading from Degrees Fahrenheit to Degrees Celsius.
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3
1
2
35
The backup switches are located behind the right armrest. The engine speed selector switch (1) (closest to the right console) controls the engine rpm. The main backup switch (2) toggles between Manual Mode and Auto Mode. The backup switches are used whenever the Machine ECM malfunction to allow limited mobility of the machine. In the Manual Mode, the Monitoring System will display the message "LIMITED MOBILITY MODE" and the Monitoring System will sound the action alarm. The main backup switch activates or deactivates the Manual Mode. When Manual Mode is active, the Machine ECM is byed and a fixed power shift pressure is provided to the main hydraulic pumps. The fixed power shift pressure limits maximum pump output and allows the machine to continue operating in a Derate Mode. Machine productivity will be limited while the machine is in the Manual Mode. In the Manuall Mode, the AEC switch and the low idle switch will not function. The engine speed switch is used to control the engine speed while the Manual Mode is active. Holding the engine speed switch in the DOWN position decreases the engine rpm. Holding the engine speed switch in the UP position increases the engine rpm. When the switch is released the switch returns to the NEUTRAL position and the machine will maintain the engine speed. This switch overrides the function of the engine speed dial. The diagnostic connector (3) is located inside of the operator's station behind the right armrest, beside the back-up switches. The connector is used to connect the machine to Cat Electronic Technician.
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2 1 3
36
The fuse (1) has been relocated to the left side of the lunch box behind the operator's seat. Some of the relays (2) are also part of the fuse . A decal (3) on the cover identifies the circuit for each fuse or relay.
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5 1 6
2
3
7
4
8
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The 300D monitor has been updated. The new monitor is used on the 308D, 311D, 312D, 314D,3 315D, 319D, 320D, 321D, 323D, 324D, 325D/329D, 328D, 330D/336D, 345C, 365C, and the 385C hydraulic excavators. The monitor is a full color Liquid Crystal Display (LCD) that displays the various parameters of the machine. Shown above are the: - alert indicator (1) - clock (2) - fuel gage (3) - hydraulic oil temperature gage (4) - engine speed dial indicator (5) - engine coolant temperature gage (6) - operating hours (7) - work tool indicator (8)
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2
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4
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6
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The monitor uses eight buttons to control navigation on the monitor screen. The four directional buttons are: - left (1) - up (2) - down (3) - right (4) The directional buttons navigate the cursor through the various screens. The four navigational buttons are: - home (5) - menu (6) - back (7) - OK (8)
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39
Cat ET or the monitoring system can be used for testing and calibrating the machine. Extended fluid change intervals are available with the proper S•O•S procedures. Maintenance intervals for several components and systems on the machine are programmed into the monitor. The operator can access component maintenance intervals to see the hours remaining before maintenance is due. Some of the maintenance items are: - hydraulic oil and hydraulic oil filter changes - swing drive oil change - travel drive oil change - engine oil and engine oil filter changes NOTE: Refer to the Self-study CD-ROM "300D Series Hydraulic Excavators, 345C Hydraulic Excavator, and 365C & 385C Large Hydraulic Excavators (form SERV7032) for more details on the monitor.
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OUTLINE OF DISPLAY SETUP
MAIN MENU SCREEN
DISPLAY SETUP
MAIN MENU
SETTING
SETTING
DISPLAY SETUP WORK TOOL SELECT
MAINTENANCE INFO PERFORMANCE
MAINTENANCE INFO
SERVICE
ENGINE OIL FILTER XXXXYYYY (HR)
MAINTENANCE
ENTER Enter or Service
SERVICE
HYD OIL RET FILTER XXXXYYYY (HR)
You can reset accumulated hour of filters and fluids and work hour of components, and change recommended Intervals. You can also operate Reversing Fan System.
ENGINE SPEED _ _ _ _ (RPM) A list of system components and measurement will be displayed
STATUS
ECM INFO
CALIBRATION
You can see each ECM information
OVERRIDE
TOOL PROGRAM
FRANCAIS
BRIGHTNESS BRIGHTNESS (
)
DEUTSCH ITALIANO ESPANOL
TOOL No. 1
OTHERS
TOOL No. 2 TOOL No. 3 TOOL No. 4
INDICATED ITEM
OTHER
TOOL NAME SERVICE HR METER ECONO MODE FIX
Entry
CONTRAST
STATUS You can see inputs of sensors and switches outputs of machine ECM
ENTER
You can calibrate each device
ENTER
CDEF 01234
_ _ _ _
DEVICE TEST You can test each device
PRESS OK TO ENTER HIGHLIGHTED LETTER : DELETE : MOVE CURSOR
BCDEF 01234 PRESS OK TO ENTER HIGHLIGHTED LETTER : DELETE : MOVE CURSOR
OVERRIDE
OK
You can test each device CONFIGURATION
Brightness Screen
_ _ _ _
CALIBRATION
Brightness ( ) Screen
5
ENTER
F _ _ _ _ BCDEF 01234 PRESS TO ENTER HIGHLIGHTED LETTER OK
: DELETE : MOVE CURSOR
OK
You can configure machine ECM
HH:MM
ENGLISH
CONTRAST
BATTERY VOLTAGE
You can change DIAGNOSTIC
DEVICE TEST
LANGUAGE SELECT
INDICATED ITEM
PERFORMANCE
CHANGE
You can check diagnostic Information (Real time error, logged error, logged events)
CONFIGURATION
CLOCK ADJUST
LANGUAGE SELECT
WORK TOOL SELECT
MAINTENANCE
ECM INFO
DISPLAY SETUP CLOCK ADJUST
A list of system components will be displayed
CHANGE DIAGNOSTIC
Text Reference Introduction
ENTER
F F _ _ _ _ BCDEF 01234
ENTER
F F _ _ F _ _
PRESS OK TO ENTER HIGHLIGHTED LETTER : DELETE : MOVE CURSOR
BCDEF 01234 PRESS OK TO ENTER HIGHLIGHTED LETTER
OK
: DELETE : MOVE CURSOR
ENTER
F F _ _ F _ _ E F 012 3 4 5 6 PRESS OK TO ENTER HIGHLIGHTED LETTER
TOOL PROGRAM : DELETE : MOVE CURSOR
You can program each tool setting
OK
40
The illustration above shows the display setup for the 300D Series excavators. NOTE: Refer to the Self-study CD-ROM "300D Series Hydraulic Excavators, 345C Hydraulic Excavator, and 365C & 385C Large Hydraulic Excavators (form SERV7032) for more details on the monitor.
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41
CONCLUSION This presentation has provided information for the Caterpillar 320D-336D Hydraulic Excavators. This presentation covered a machine walkaround and focused on the operator compartment. Additional presentations are available for each system used on these machines. When used in conjunction with the service manual, the information in this package should permit the technician to do a thorough job of analyzing a problem in these systems. For service repairs, adjustments, and maintenance, always refer to the Operation and Maintenance Manual, Service Manuals, and other related service publications.
GLOBAL SERVICE LEARNING TECHNICAL PRESENTATION
320D -336D HYDRAULIC EXCAVATORS TIER III ENGINES INTRODUCTION
Service Training Meeting Guide (STMG)
320D -336D HYDRAULIC EXCAVATORS TIER III ENGINES INTRODUCTION ((320D - 336D) AUDIENCE Level II - Service personnel who understand the principles of machine systems operation, diagnostic equipment, and procedures for testing and adjusting.
CONTENT This presentation provides an introduction and machine walkaround for the 320D-336D Hydraulic Excavator. Additional presentations will cover the engines, pilot system, pumps and controls, main control valve group, swing system, travel system, and tool control systems in more detail. This presentation may be used for self-paced and self-directed training.
OBJECTIVES After learning the information in this presentation, the technician will be able to: 1. identify the major components and controls of a 320D-336D Hydraulic Excavator, and 2. perform a machine walkaround inspection and daily maintenance.
REFERENCES 320D Hydraulic Excavator Specalog 323D L and 323D LN Hydraulic Excavators 324D Hydraulic Excavator Specalog 325D Hydraulic Excavator Specalog 328D Hydraulic Excavator Specalog 330D Hydraulic Excavator Specalog Machine Monitoring System - Systems Operation Self-study "300D Series Hydraulic Excavators, 345C Hydraulic Excavator, and 365C & 385C Large Hydraulic Excavators iTIM " '300C' Series Hydraulic Excavators-Electronic Control Systems" iTIM "325C Hydraulic Excavators-Hydraulic Systems" 325D Hydraulic Schematic
Estimated Time: 1 Hour Illustrations: 41 Form: SERV1852-02 Date: August 2008 © 2008 Caterpillar
AEHQ5856 HEHH3327 AEHQ5663 AEHQ5665 AEHQ5706 AEHQ5667 RENR8068 SERV7032 SERV2693 SERV2701 KENR6157
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TABLE OF CONTENTS INTRODUCTION ........................................................................................................................5 MACHINE WALK-AROUND...................................................................................................14 325D Hydraulic Excavator ...................................................................................................16 330D Hydraulic Excavator ...................................................................................................25 OPERATOR STATION ..............................................................................................................33 CONCLUSION...........................................................................................................................48
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PREREQUISITES "Fundamentals of Mobile Hydraulics Self Study Course" "Fundamentals of Power Train Self Study Course" "Fundamentals of Electrical Systems Self Study Course" "Fundamentals of Engines Self Study Course"
TEMV3002 TEMV3003 TEMV3004 TEMV3001
NOTES Nomenclature Change: During the fourth quarter of 2008, the 325D and 330D nomenclature changed. The 325D became the 329D and the 330D became the 336D for most arrangements. The exceptions are as follows: - The nomenclature for the 325D MH and 330D MH did not change. - The nomenclature for the 325D FM and 330D FM did not change. - The 325D HD HW did not change into 329D HD HW. This model is being discontinued. However, the 330D HD HW changed to the 336D HD HW.
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320D-336D EXCAVATORS - TIER III ENGINES INTRODUCTION AND SYSTEMS OPERATION (320D - 330D)
© 2008 Caterpillar
1
INTRODUCTION The Caterpillar 320D-336D range of Hydraulic Excavators incorporate design innovations and performance improvements from the 300C Hydraulic Excavator Series and are a direct replacement for them. The range comprises of: 320D, 321D, 323D, 324D, 325D, 328D, & 330D, with some models having various additional machine arrangements. During the fourth quarter of of 2008, the 329D replaced the 325D and the 336D replaced the 330D for most arrangements. The machines feature a new cab for greater operator comfort. The cab provides the operator with excellent visibility of processing equipment, trucks, and railcars. The cab, consoles, and joysticks have been improved to provide a better access and understanding of all functions. This presentation discusses the systems operation of the 320D-336D Hydraulic Excavators, along with basic engine and machine component location. NOTE: Most of the illustrations of the iron in this presentation will be of the 325D and 330D excavators. The other models will be configured similarly, but component locations may be different. Some of the illustrations may show pilot iron instead of production iron. The most significant differences will be related to the engine compartment due to the three different engines being used in this series of machines as well as two of the models being compact radius (CR).
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300D SERIES HYDRAULIC EXCAVATORS Model Engine
Configurations Available
320D
C6.4
L, LN, FM, MH, RR, L RR, LL
321D
C6.4
CR, LCR
323D
C6.4
L, LN, S, SA
324D
C7
L, LN, FM
325D/329D
C7
L, LN, FM, MH, L MH, UHD, L HW, L HD
328D
C7
LCR
330D/336D
C9
L, LN, FM, MH, WH, L HD, L RE, U HD, L HW
During the fourth quarter of 2008, the 325D became the 300D and the 330D became the 336D for most machine configurations. The 325D MH and 330D MH did not change. The 325D FM and 330D FM did not change. The 325D HD HW was discontinued.
2
The 320D-336D Hydraulic Excavators cover the 20 to 36 metric ton class of excavators and are extremely versatile machines capable of performing a wide range of tasks by utilizing the various work tools available. For the "D" Series models shown, they are all equipped with ACERTTM Tier III engines. NOTE: Some of the "D" Series excavators arrangements are built using Tier II engines to better meet market needs in certain parts of the world. The machines can be configured with a wide range of undercarriages including standard, long (L) and long and narrow width (LN). For some models additional letters are included in the nomenclature, for example: forest machine (FM), material handler (MH), heavy duty (HD), and waste handling (WH) to designate the machine application. The 321D and 328D are only available as compact radius (CR) machines. As mentioned, during the fourth quarter of 2008, the 325D and 330D nomenclature changed to the 329D and 336D respectively. The reason for the change was to better align the machine nomenclature with the actual machine weight. Making this change should lead to increased machine sales.
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The exceptions to this nomenclature change are as follows: - The nomenclature for the 325D MH and 330D MH did not change. - The nomenclature for the 325D FM and 330D FM also did not change. - The 325D HD HW did not change into 329D HD HW. This model is being discontinued. However, the 330D HD HW changed to the 336D HD HW.
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3
4
The 320D, 325D, and 330D can be configured as a material handler (MH). A fixed cab riser, or as shown here, a hydraulic cab riser is available. The cab riser provides different operating heights with excellent visibility for loading and unloading processing equipment, trucks, and rail cars. The 321D CR and 328D LCR are compact radius (CR) machines. With CR machines, the machine tailswing is within the width of the undercarriage (depending on track width).
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SIMILARITIES AND DIFFERENCES FEATURES
DIFFERENT
Machine Appearance
SIMILAR X
Operator s Station
X
Engine
X
Implement Hydraulic System Monitoring System
SAME
X X
Maintenance Items
X
Tool Control Systems
X
Machine ECM
X
Travel System
X
Undercarriage
X
5
This chart displays some the similarities and differences between the 300D Series and the 300C Series hydraulic excavators. New and improved features include: Operator's Station: The layout of the interior has been redesigned to maximize operator comfort and reduce operator fatigue. Frequently used switches have been relocated for easier access. The consoles and armrests have been redesigned for better comfort and adjustability. More seat options are available: the standard mechanical suspension seat, or the optional air suspension seat with heater. Engine: The "D" Series machines are equipped with Tier III ACERTTM engines. The C6.4 engine is used in the 320D, 321D, and 323D. The C7 engine is used in the 324D, 325D/329D, and the 328D. The C9 engine is used in the 330D/336D. Monitor: The monitor is a full color Liquid Crystal Display that provides vital operating and performance information, which is all in a simple, easy to navigate format. Tool Control: The tool control systems for the 300D are similar in function as the tool control systems for the 320C - 330C medium excavators, although the medium pressure circuit is now a stand-alone function.
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The SmartBoom™ attachment enhances operation of the boom function and significantly reduces cycle times of the machine. The SmartBoom™ is essentially a boom float attachment, which allows the operator to lower the boom under its own weight or for the boom to raise up due to stick force. Service and maintenance intervals have been extended to reduce machine service time and increase machine availability. Options include the following: The Machine Security System (MSS): This system uses a special Caterpillar key with an embedded electronic chip for controlling unauthorized machine operation. Product Link: This option provides all kinds of information and working parameters through a satellite connection between an on-board computer and the machine. Product Link provides easier fleet management and improved preventive maintenance. PL121 and PL321 are both available. AccuGrade: This option provides precise control of the work tool using special software. Auxiliary Hydraulic Options: This option allows the machine to be configured to meet the work tool needs, while increasing its versatility. - Single Function Circuit is suited for tools that require one-way flow with one or both pumps, such as hammers and vibratory plate compactors. - Double Function Circuit is suited for tools that require two-way flow, utilizing one or two pump flows, such as thumbs, non-rotation grapples, or shears.
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MAIN HYDRAULIC SYSTEM Stick Cylinder Bucket Cylinder Swing Motor
Main Control Valve Group
Pilot Control Valves
Priority Valves
Pilot Manifold
Pilot Pump Fan Motor
Boom Cylinders
Travel Motors
Main Hydraulic Pumps
M Fan Pump
Tank
The Fan Motor and Pump are only Used on the 330D and 336D
6
For the most part the main implement hydraulic system operation for the 320D-336D is the same as the 300C Series. The "D" Series continues using many of the "C "excavator features, such as automatic priorities and tool control systems. The machines use a negative flow (NFC) hydraulic system. The main control valve group and pumps are similar to the "C" Series. Each of the models may have the components located in different locations due to the size of the machine or the type of carbody. The 330D/336D is equipped with a new main hydraulic pump design and is the only model equipped with a hydraulic demand fan system. The smaller machines can be equipped with an optional visconic demand fan if needed for working in areas with high ambient temperatures.
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7 The optional tool control system maximizes work tool productivity by configuring hydraulic flow, pressure, and operator controls to match a specific work tool. System versatility enables a wide range of tools to be used. The system stores pressure and flow information for up to ten tools. Selectable Cat tools have preset flows and pressures. The 300D excavators produced in Akashi and Aurora (for the North American Commercial Division (NACD) can be equipped with the following factory installed tool control systems: - System 3 (Hammer) - provides two pump flow in a single direction only. This system also includes a mechanical line relief valve for tools requiring lower pressure settings (single action). - System 5 (Thumb) - provides one pump flow in both directions (extend/retract double action) and can be controlled with a foot pedal or a joystick. - System 14 (Multifunction) - provides one or two pump flow in one or two directions (single action or double action). System 14 has full electronic controls. An optional, independent medium pressure circuit is used for such applications as a rotating shear or ditch cleaning bucket. The System 14 functions are now controlled through the Machine ECM. A separate Tool Control ECM as was used on the 300C Series is not needed.
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The machines produced in Akashi and Gosselies for the EAME market will have the following factory installed optional tool control systems: - System 16 - provides two pump flow in a single direction, has a direct return system to the hydraulic tank, and includes a mechanical for tools requiring lower pressure settings (single action). - System 17 (Multifunction) - provides one or two pump flow in one or two directions (single action or double action). System 17 has a direct return system to the hydraulic tank, instead of the oil returning through the main control valve group. System 17 has full electronic controls. An independent medium pressure circuit is available with System 17 to use for applications such as a rotating shear or a ditch cleaning bucket.
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5
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MACHINE WALK-AROUND The 300D Series track excavators have been designed for fast, easy service with extended service intervals, advanced filtration, convenient filter access, and -friendly electronic diagnostics for increased productivity and reduced maintenance costs. The hydraulic system and component locations have been designed to provide a high level of system efficiency. The main pumps, control valves, and hydraulic tank are located close together to allow for shorter tubes and lines between components which reduces friction loss and pressure drops in the lines. This design reduces engine compartment heat and sound being transmitted to the operator. Components shown include: - stick (1) - boom (2) - operator station (3) - access door to air cleaner and battery compartment (4) - engine access cover (5) - access door to radiator compartment (6) - counterweight (7)
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9
This illustration shows the major components and service areas on the machine. NOTE: The 325D and 330D will be used on the following pages to show components and their locations on the 300D Series excavators. These locations may vary between the other models. The locations and components used on the 320D, 321D, 323D, 324D and 328D will be more similar to the 325D/329D than the 330D/336D.
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4
5
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325D/329D Hydraulic Excavator This illustration shows access to the top of the machine from the right side. The engine access cover (1) allows access to the engine from the top of the machine. The machine hydraulic oil tank (2) is located between the pump compartment and the diesel fuel tank on the right side of the machine and is accessed from the top of the machine. The diesel fuel filler cap (3) is accessed from the top of the machine. The storage compartment (4) is located in the front of the machine. The step and hand rail (5) at the right front of the machine can be used for access to the top of the machine.
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2 4 1
5 3 6
11
The compartment behind the operator station includes the following components: - Machine ECM (1) - air conditioning condenser and receiver (2) - master disconnect switch and circuit breakers (3) - dual element, radial seal air filter (4) - batteries (5) - engine shutoff switch (6) (on machines with a cab riser) The Machine ECM also includes software for the Tool Control System. NOTE: The machine used in this illustration is equipped with a cab riser. On most machines a window washer solvent reservoir would be shown behind the master disconnect switch and circuit breakers.
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1
2 6 3
8
10 4 9
5 7
12
The radiator access compartment is located in front of the counterweight. The door is hinged on the right and has a locking latch on the left side to keep it closed. This door provides access to assist in cleaning some of the cooling system components: - Air to Air After Cooler (ATAAC) (1) - manual cab lowering valve (2) (only for machines with cab risers) - hydraulic oil cooler (3) - fuel priming pump (4) (will be changed to electric priming pump) - fuel filter (5) - fuel sensors (6) (temperature and pressure) - fuel water separator (7) - engine coolant overflow bottle (8) - radiator (located behind the water separator and coolant overflow bottle) (9) - left compartment release lever (access to batteries and air filter) (10) - joystick pattern change valve (not shown) is located on compartment floor
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8
7
2 1
5
6
4 3 10
9
13
The illustration shows the pump compartment on the right side of the machine. The compartment is accessed from the right side of the machine when the rear access door is open. Some of the visible components are: - engine oil filter (1) - pilot pump (2) - medium pressure circuit pump (3) - drive pump (4) - idler pump (5) - pilot filter (6) - case drain filter (7) - hydraulic system return oil filter (8) - pressure taps for auxiliary tool solenoids (9) - solenoids for the medium pressure circuits (10)
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1
2
3
4
14
The 320D-336D pilot manifold is the same as the 300C Series pilot manifold. The pilot manifold is accessible by removing the cover plate under the machine, behind the swing bearing. The manifold is located directly below the main control valve. Pilot manifold components visible are: - two-speed travel solenoid (1) - swing brake solenoid (2) - hydraulic activation valve (3) - hydraulic activation solenoid (4)
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10
7 9
2
11 12 13
8 1
15
The main control valve group is located in the center of the upper structure of the machine. The main control valve group receives pilot oil signals from the operator controls in the cab. Each pilot signal then causes the appropriate control valve to shift. When a control valve shifts, oil flows from the main hydraulic pumps to the appropriate hydraulic cylinder or hydraulic motor to perform work. The 300D main control valve group is similar to the 300C main control valve group. The valves are: - right side NFC relief valve (1)
- dual stage main relief valve (8)
- stick 2 (2)
- left travel (9)
- boom 1 (3)
- swing (10)
- bucket (4)
- stick 1 (11)
- attachment (5)
- boom 2 (12)
- right travel (6)
- auxiliary valve for Tool Control (13)
- straight travel valve (7)
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1
16
2
4 3
17
The single 325D/329D swing motor (1) receives oil from the swing control valve. The swing control valve receives hydraulic pump oil from the left pump. The swing drive oil level can be checked with dipstick (2). The travel motors (not shown) drive the outboard, planetary-type final drives (3). A wide range of undercarriage (4) options are available to meet the needs of the machine application.
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6
1
5 2
4
3
18
The 325D/329D (324D and 328D also) is equipped with a C7 ACERT™ Engine (1). Also visible are: - the engine crankcase breather (2) - engine oil level gage (3) - S•O•S coolant sampling valve (4) - engine oil fill cap (5) - inlet air heater (6) NOTE: The 320D, 321D, and 323D engine compartment will be slightly different due to the use of the C6.4 engine.
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19
The engine cooling fan (arrow) on the 325D/329D is mechanically driven off the front of the engine. An electrically controlled viscous clutch fan is available as an attachment to reduce fan noise on the 320D - 329D. The optimum fan speed is calculated based on the target engine speed, coolant temperature, hydraulic oil temperature, and actual fan speed. When fan speed is reduced, there is more engine horespower available for other functions and less fuel is burned. NOTE: The 330D uses a hydraulic demand fan.
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Text Reference Introduction
3
4
5
6
20
330D/336D Hydraulic Excavator This illustration shows access to the top of the machine from the right side. The engine access cover (1) allows access to the engine from the top of the machine. The hydraulic tank (2) is located between the pump compartment and the diesel fuel tank on the right side of the machine and is accessed from the top of the machine. The diesel fuel filler cap (3) is accessed from the top of the machine. A boom lowering check valve (4) (if equipped) is mounted on each boom cylinder. The storage compartment (5) is located in the front of the machine. The step and hand rail (6) at the right front of the machine can be used for access to the top of the machine.
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Text Reference Introduction
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The air cleaner and battery compartment includes the following components: - Machine ECM (1) - air conditioning condenser and receiver (2) - window washer solvent reservoir (3) - master disconnect switch and circuit breakers (4) - dual element, radial seal air filter (5) - ether start aid solenoid (6) - batteries (7)
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Text Reference Introduction
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The radiator access compartment is located in front of the counterweight. The door is hinged on the right and has a locking latch on the left side to keep it closed. This door provides access for cleaning some of the cooling system components and servicing some of the fuel system and cooling system components. The following components are called out in the illustration above: - hydraulic oil cooler (1) - fuel pressure sensors (2) - switch for electric fuel priming pump (3) - electric fuel priming pump (4) - fuel filter (5) - Air to Air After Cooler (ATAAC) (6) - radiator (7) - engine coolant overflow bottle (8) - fuel water separator (9) A joystick pattern change valve if equipped (not shown) is located on this compartment.
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Text Reference Introduction
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The illustration shows the pump compartment on the right side of the machine. Some of the visible components are: - quick coupler solenoid valve (1)
- pilot pump (7)
- engine oil filter (2)
- pilot filter (8)
- fan pump (3)
- drive (right) pump (9)
- medium pressure circuit pump (4)
- idler (left) pump (10)
- medium pressure solenoids (5)
- case drain filter (11)
- pressure taps for auxiliary tool solenoids (6)
- hydraulic system return oil filter (12)
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The main control valve group is located in the center of the upper structure of the machine. The main control valve group receives pilot oil signals from the operator controls in the cab. Each pilot signal then causes the appropriate control valve to shift. When a control valve shifts, oil flows from the main hydraulic pumps to the appropriate hydraulic cylinder or hydraulic motor to perform work. The 330D/336D main control valve group is similar to the 330C main control valve group. The components shown include the: - right side NFC relief valve (1)
- dual stage main relief valve (8)
- stick 2 (2)
- left travel (9)
- boom 1 (3)
- swing (10)
- bucket (4)
- stick 1 (11)
- attachment (5)
- boom 2 (12)
- right travel (6)
- auxiliary valve for tool control (13)
- straight travel valve (7)
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The single 330D/336D swing motor (1) receives oil from the swing control valve. The swing control valve receives pump oil from the left pump. Additional swing motor components shown are: - swing brake release pressure line (2) - swing drive oil level dipstick (3) - fine swing solenoid harness (4) - swing crossover relief valves (5)
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Text Reference Introduction
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The 330D/336D is equipped with a C9 ACERT™ Engine (1). The engine is rated at 200 kW (268 hp) at 1800 rpm. ACERT™ Technology offers better fuel economy and reduced wear. Also visible in the photo are the: - engine oil dipstick (2) - inlet air heater (3) - engine oil fill (4) - S•O•S coolant sampling valve (5)
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Text Reference Introduction
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The 330D/336D engine fan (1) is hydraulically driven by a fixed displacement motor (2). The fan motor is supplied oil from the fan pump. Fan speed is varied to provide optimized cooling. The optimum fan speed is calculated using engine coolant temperature and hydraulic oil temperature. The direction of the engine fan can be reversed on machines equipped with the reversible fan option. The fan motor rotation can be changed with the monitor. The reversal of the fan motor is used to clear debris and dust from the radiator and hydraulic oil cooler. NOTE: Operation of the hydraulic fan system will be covered in more detail later.
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Text Reference Introduction
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OPERATOR STATION The 320D-336D hydraulic excavator operator station has an updated look with a new color scheme. The cab post and rear of the cab have been changed to black while the counterweight design has been changed with an enlarged CAT® decal and distinctive styling. The newly designed cab features improved visibility and operator comfort. Conveniently placed switches, gages, information display, and controls improve operator comfort, awareness, and efficiency. Frequently used switches have been relocated to improve accessibility. A full color Liquid Crystal Display monitor provides vital operating and performance information, alerts in text, in a simple, easy to navigate format. The monitor provides increased functionality for the operator. For operator comfort, the new cab offers a fully adjustable air suspended seat with side-to-side shock absorption, which provides maximum operator comfort. The fuse has been moved to the left side of the lunch box compartment and behind the operator's seat for easy access. A 24-volt AM/FM radio, mounted in the right console, is standard.
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Text Reference Introduction
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Controls in the cab include the: - left (1) and right (2) travel pedals - left (3) and right (4) travel pedal levers - straight travel pedal (5) (attachment) - right joystick (6) to control the bucket and boom (SAE excavator pattern) - left joystick (7) to control the swing and stick (SAE excavator pattern) The switch for one-touch low idle (AEC) is on the right joystick. The left joystick includes the horn switch. If the machine is equipped with a magnet, the trigger switch on the front of the right joystick turns the magnet on, while the trigger switch on the front of the left joystick turns the magnet off. The service hour meter (8) can be seen to the left of the attachment pedal.
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Text Reference Introduction
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The hydraulic activation lever (1) has been redesigned, however, the lever serves the same purpose as before. With the lever in the down position (shown), the hydraulic activation solenoid is in the de-activated position. No hydraulic functions are available with the lever in the down position. When the lever is moved to the up position the hydraulic activation solenoid is energized and pilot oil is available to operate the joysticks. The ground level emergency engine shutoff switch (2) is located on the bottom of the seat mount. The shutoff switch will shut off the engine without having to climb into the cab. Once the shutoff switch is turned ON and then OFF, the key start switch must be cycled for the machine to operate again.
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All of the operator functions are incorporated into the right side of the operator's station. The functions are: - engine speed dial switch (1) - key start switch (2) - cigarette lighter (3) - soft switch (4) - rocker switches (5) - HVAC controls (6) - radio (7)
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The soft switch includes switches that either turn a function ON/OFF or allows the operator to toggle through different modes of the selected function. The soft switches provide the operator with the following functions: Two-speed travel switch (1): When the button is pushed the travel speed is toggled between low and auto. - The rabbit indicator indicates auto speed. - The tortoise indicator indicates low speed. Automatic Engine Control (AEC) switch (2): The AEC function automatically reduces engine speed while there is no hydraulic demand, which reduces noise and fuel consumption. - The AEC switch disables and enables the AEC function. - Initially, AEC reduces the engine speed by 100 rpm after there has been no hydraulic demand for approximately three seconds. - Then AEC reduces the engine rpm to approximately 1300 rpm after there has been no hydraulic demand for an additional three seconds. - The additional three second AEC delay time and the low speed of 1300 rpm can be changed using the monitor or Caterpillar Electronic Technician (Cat ET).
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Text Reference Introduction
Travel alarm cancel switch (3): The travel alarm cancel switch is a momentary two-position switch. - The travel alarm sounds when travel is detected. - The travel alarm stops immediately if the travel alarm cancel switch is depressed. - The travel alarm switch is reset every time the travel pressure switch opens. Work tool switch (4): The work tool switch will show the selected work tool on the monitor display. Press the switch repeatedly to change the selected work tool. When the desired work tool is highlighted in the monitor display press the "OK" button on the monitor to select the work tool shown. Work lights switch (5): The work lights switch toggles between the different work light combinations. Two different work light patterns are available. - Pattern 1: Chassis work lights and cab work lights. - Pattern 2: Chassis work lights, cab work lights, and boom work lights. Upper window wipers switch(6): The wiper switch toggles between the following different modes of the wipers. - six second delay. - three second delay. - continuous operation. - off Upper window washer switch(7): The windshield washer fluid switch is an ON/OFF switch. Heavy lift mode switch (8): The Heavy lift mode switch can be selected to increase lifting capability and provide improved controlability of heavy loads. - When heavy lift is turned on, the main relief valve maximum pressure increases from 35,000 MPa (5080 psi) to 36,000 MPa (5225 psi), making it possible to operate the system at a higher pressure. - In Heavy Lift Mode, the maximum engine speed is limited to engine speed dial 6 (1510 ± 90 rpm). - Hydraulic horsepower maximum output is reduced to 60%.
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The toggle and rocker switch contains switches that control additional functions: Quick coupler lock control switch (1): The quick coupler lock control switch is a spring centered toggle switch. - The top position locks the quick coupler. - The bottom position unlocks the quick coupler. Fine swing control switch(2): The fine swing control switch is a two-position rocker switch. - The top position activates fine swing control. Fine swing control improves the swing control during swing deceleration. - The bottom position deactivates fine swing control. Rear window washer switch (3): The rear window washer fluid switch is a two-position rocker switch. - The top position activates the windshield washer fluid. - The bottom position deactivates the windshield washer fluid. Rear window wiper (4): The rear window wiper switch is a two-position rocker switch. - The top position activates the wiper. - The bottom position deactivates the wiper.
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Text Reference Introduction
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The heating and air conditioning system (HVAC) is electronically controlled. The control for the heating and air conditioning system is located on the right console. The switches on the control are: ON/OFF switch (1): Push the ON/OFF switch in order to power on the system. Push the switch again in order to power off the system. Automatic control switch (2): In order to enter the full "AUT" Mode for automatic climate control, push this switch. However, if the switch is pushed again, the air conditioning can not be turned off using this switch. When the system is in full "AUT" Mode, specific functions can be manually changed by pushing another switch. If a specific function is manually changed, "AUT" will not appear in the display, but the unchanged functions will remain in "AUT" mode. In order to take advantage of the full "AUT" setting of the climate control system, always keep the sunlight sensor clean. Do not obstruct the sunlight sensor. If the climate control system is in the full "AUT" setting at engine start-up and the temperature inside the cab is too warm or too cool, the damper for fresh air ventilation may automatically close for a few minutes. This action will help to bring the air temperature to the preset temperature more quickly. NOTE: "AUT" represents "auto".
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Text Reference Introduction
Temperature switch (3): This switch controls the temperature of the air entering from the air outlets in order to achieve the preset temperature. The preset temperature appears on display. If the heating and air conditioning system is in the automatic mode, pushing these switches changes the preset temperature. LCD (4): The displays the settings of the HVAC system. Fan switch (5): The fan switch directly controls the fan speed. If the climate control system is operating in the automatic mode, pushing this switch overrides the automatically selected fan speed. Compressor switch (6): Push the switch in order to turn on the compressor or push the switch in order to turn off the compressor. In humid conditions, the compressor may be used to remove moisture from the air in the cab. In cool weather, operate the compressor weekly in order to prevent leakage of the refrigerant gas and to help maintain the compressor in optimum working order. Defrost mode switch (7): Depressing this switch will defog the windows. The air will also be dehumidified while the compressor is running. Air inlet select switch (8): This switch selects the position of the air inlet for recirculation or for fresh air. Air outlet select switch (9): This switch selects the position of each air outlet. Each switch controls a different air outlet. - upper body switch - upper body and floor switch - floor switch - floor and defroster switch NOTE: In order to convert the temperature reading from Degrees Celsius to Degrees Fahrenheit, depress both keys of the fan switch at the same time for five seconds. This same action is used for converting the temperature reading from Degrees Fahrenheit to Degrees Celsius.
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The backup switches are located behind the right armrest. The engine speed selector switch (1) (closest to the right console) controls the engine rpm. The main backup switch (2) toggles between Manual Mode and Auto Mode. The backup switches are used whenever the Machine ECM malfunction to allow limited mobility of the machine. In the Manual Mode, the Monitoring System will display the message "LIMITED MOBILITY MODE" and the Monitoring System will sound the action alarm. The main backup switch activates or deactivates the Manual Mode. When Manual Mode is active, the Machine ECM is byed and a fixed power shift pressure is provided to the main hydraulic pumps. The fixed power shift pressure limits maximum pump output and allows the machine to continue operating in a Derate Mode. Machine productivity will be limited while the machine is in the Manual Mode. In the Manuall Mode, the AEC switch and the low idle switch will not function. The engine speed switch is used to control the engine speed while the Manual Mode is active. Holding the engine speed switch in the DOWN position decreases the engine rpm. Holding the engine speed switch in the UP position increases the engine rpm. When the switch is released the switch returns to the NEUTRAL position and the machine will maintain the engine speed. This switch overrides the function of the engine speed dial. The diagnostic connector (3) is located inside of the operator's station behind the right armrest, beside the back-up switches. The connector is used to connect the machine to Cat Electronic Technician.
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The fuse (1) has been relocated to the left side of the lunch box behind the operator's seat. Some of the relays (2) are also part of the fuse . A decal (3) on the cover identifies the circuit for each fuse or relay.
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The 300D monitor has been updated. The new monitor is used on the 308D, 311D, 312D, 314D,3 315D, 319D, 320D, 321D, 323D, 324D, 325D/329D, 328D, 330D/336D, 345C, 365C, and the 385C hydraulic excavators. The monitor is a full color Liquid Crystal Display (LCD) that displays the various parameters of the machine. Shown above are the: - alert indicator (1) - clock (2) - fuel gage (3) - hydraulic oil temperature gage (4) - engine speed dial indicator (5) - engine coolant temperature gage (6) - operating hours (7) - work tool indicator (8)
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The monitor uses eight buttons to control navigation on the monitor screen. The four directional buttons are: - left (1) - up (2) - down (3) - right (4) The directional buttons navigate the cursor through the various screens. The four navigational buttons are: - home (5) - menu (6) - back (7) - OK (8)
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Cat ET or the monitoring system can be used for testing and calibrating the machine. Extended fluid change intervals are available with the proper S•O•S procedures. Maintenance intervals for several components and systems on the machine are programmed into the monitor. The operator can access component maintenance intervals to see the hours remaining before maintenance is due. Some of the maintenance items are: - hydraulic oil and hydraulic oil filter changes - swing drive oil change - travel drive oil change - engine oil and engine oil filter changes NOTE: Refer to the Self-study CD-ROM "300D Series Hydraulic Excavators, 345C Hydraulic Excavator, and 365C & 385C Large Hydraulic Excavators (form SERV7032) for more details on the monitor.
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OUTLINE OF DISPLAY SETUP
MAIN MENU SCREEN
DISPLAY SETUP
MAIN MENU
SETTING
SETTING
DISPLAY SETUP WORK TOOL SELECT
MAINTENANCE INFO PERFORMANCE
MAINTENANCE INFO
SERVICE
ENGINE OIL FILTER XXXXYYYY (HR)
MAINTENANCE
ENTER Enter or Service
SERVICE
HYD OIL RET FILTER XXXXYYYY (HR)
You can reset accumulated hour of filters and fluids and work hour of components, and change recommended Intervals. You can also operate Reversing Fan System.
ENGINE SPEED _ _ _ _ (RPM) A list of system components and measurement will be displayed
STATUS
ECM INFO
CALIBRATION
You can see each ECM information
OVERRIDE
TOOL PROGRAM
FRANCAIS
BRIGHTNESS BRIGHTNESS (
)
DEUTSCH ITALIANO ESPANOL
TOOL No. 1
OTHERS
TOOL No. 2 TOOL No. 3 TOOL No. 4
INDICATED ITEM
OTHER
TOOL NAME SERVICE HR METER ECONO MODE FIX
Entry
CONTRAST
STATUS You can see inputs of sensors and switches outputs of machine ECM
ENTER
You can calibrate each device
ENTER
CDEF 01234
_ _ _ _
DEVICE TEST You can test each device
PRESS OK TO ENTER HIGHLIGHTED LETTER : DELETE : MOVE CURSOR
BCDEF 01234 PRESS OK TO ENTER HIGHLIGHTED LETTER : DELETE : MOVE CURSOR
OVERRIDE
OK
You can test each device CONFIGURATION
Brightness Screen
_ _ _ _
CALIBRATION
Brightness ( ) Screen
5
ENTER
F _ _ _ _ BCDEF 01234 PRESS TO ENTER HIGHLIGHTED LETTER OK
: DELETE : MOVE CURSOR
OK
You can configure machine ECM
HH:MM
ENGLISH
CONTRAST
BATTERY VOLTAGE
You can change DIAGNOSTIC
DEVICE TEST
LANGUAGE SELECT
INDICATED ITEM
PERFORMANCE
CHANGE
You can check diagnostic Information (Real time error, logged error, logged events)
CONFIGURATION
CLOCK ADJUST
LANGUAGE SELECT
WORK TOOL SELECT
MAINTENANCE
ECM INFO
DISPLAY SETUP CLOCK ADJUST
A list of system components will be displayed
CHANGE DIAGNOSTIC
Text Reference Introduction
ENTER
F F _ _ _ _ BCDEF 01234
ENTER
F F _ _ F _ _
PRESS OK TO ENTER HIGHLIGHTED LETTER : DELETE : MOVE CURSOR
BCDEF 01234 PRESS OK TO ENTER HIGHLIGHTED LETTER
OK
: DELETE : MOVE CURSOR
ENTER
F F _ _ F _ _ E F 012 3 4 5 6 PRESS OK TO ENTER HIGHLIGHTED LETTER
TOOL PROGRAM : DELETE : MOVE CURSOR
You can program each tool setting
OK
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The illustration above shows the display setup for the 300D Series excavators. NOTE: Refer to the Self-study CD-ROM "300D Series Hydraulic Excavators, 345C Hydraulic Excavator, and 365C & 385C Large Hydraulic Excavators (form SERV7032) for more details on the monitor.
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CONCLUSION This presentation has provided information for the Caterpillar 320D-336D Hydraulic Excavators. This presentation covered a machine walkaround and focused on the operator compartment. Additional presentations are available for each system used on these machines. When used in conjunction with the service manual, the information in this package should permit the technician to do a thorough job of analyzing a problem in these systems. For service repairs, adjustments, and maintenance, always refer to the Operation and Maintenance Manual, Service Manuals, and other related service publications.
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