320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System Caterpillar


System Operation

Usage:

325D L A3R

Information for equipment:


ELECTRICAL AND STARTING SYSTEM
ELECTRONICS GP-MACHINE

The Programmable Monitoring System Parameters Have New Descriptions {1901, 1902, 7620} 2007/10/22
New CAT Inspect Form Available for EMCP Troubleshooting and Inspection {0374, 4490, 7451, 7620} New CAT Inspect Form Available for EMCP Troubleshooting and Inspection {0374, 4490, 7451, 7620}

Machine Security System - If Equipped 325D and 329D Excavators

Installation of the Machine Security System (MSS) Universal Attachment Kit {7631, 7631} Installation of the Machine Security System (MSS) Universal Attachment Kit {7631, 7631}
Diagnostic Code Information for Caterpillar <SUP>&reg;</SUP> Electronic Control {1901, 1927, 1948, 3168, 4348, 4802, 4808, 4810, 5511, 5701, 7490, 7494, 7601, 7602, 7610, 7610, 7610} Diagnostic Code Information for Caterpillar ® Electronic Control {1901, 1927, 1948, 3168, 4348, 4802, 4808, 4810, 5511, 5701, 7490, 7494, 7601, 7602, 7610, 7610, 7610}

PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, AND MATERIAL HANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, AND MATERIAL HANDLERS
PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS

PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS

PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS

PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, AND MATERIAL HANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, AND MATERIAL HANDLERS
PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS

PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, AND MATERIAL HANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, AND MATERIAL HANDLERS
PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS

A False Diagnostic Code is Generated When Flashing Software in Some Excavators{1901, 1902, 7600, 7610, 7620} A False Diagnostic Code is Generated When Flashing Software in Some Excavators{1901, 1902, 7600, 7610, 7620}
Machine ECM Trouble Shooting Guideline on Certain Excavators and Mobile Hydraulic Power Units{7569, 7600} Machine ECM Trouble Shooting Guideline on Certain Excavators and Mobile Hydraulic Power Units{7569, 7600}
Quick Coupler Installation Status{7610, 7620} Quick Coupler Installation Status{7610, 7620}

Communication Adapter II{0600, 0709, 7600, 7610} Communication Adapter II{0600, 0709, 7600, 7610}

PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS

PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS

General Information 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
System Operation 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
Diagnostic Operation 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
Electronic Control Module (Machine) 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
Related Components 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
General Information Machine Security System (MSS3i) Integrated
System Overview Machine Security System (MSS3i) Integrated
Operation of Status Indicator Machine Security System (MSS3i) Integrated
Key Information Machine Security System (MSS3i) Integrated
Scheduled Access - "Security System Bypass Times" Machine Security System (MSS3i) Integrated
Diagnostic Operation Machine Security System (MSS3i) Integrated
Protected Functions Machine Security System (MSS3i) Integrated
Service Operation Using Service Tool Machine Security System (MSS3i) Integrated
Electronic Control Module (ECM) Machine Security System (MSS3i) Integrated
System Components Machine Security System (MSS3i) Integrated
Data Link Machine Security System (MSS3i) Integrated
Normal Operation Machine Security System (MSS3i) Integrated

PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS PRODUCT SUPPORT PROGRAM FOR REPLACING CELLULAR PRODUCT LINK DEVICES ON CERTAIN WHEELED EXCAVATORS, EXCAVATORS, MATERIAL HANDLERS, AND TELEHANDLERS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR INSTALLING PRODUCT LINK PL542 OR PL240B CELLULAR RADIO SYSTEMS ON CERTAIN CATERPILLAR PRODUCTS
PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS PRODUCT SUPPORT PROGRAM FOR UPDATING PRODUCT LINK PLE601/PLE631/PLE641 ON CERTAIN CATERPILLAR PRODUCTS

Electronic Control Module (ECM) - Flash Program 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
Glossary of Electrical Terms 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
Calibration 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
Electronic Control Module (ECM) - Configure 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
Electronic Control Module (ECM) - Replace 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
General Information Machine Security System (MSS3i) Integrated
Troubleshooting Machine Security System (MSS3i) Integrated
Key - Program Machine Security System (MSS3i) Integrated
Scheduled Access - Program - Security System Bypass Machine Security System (MSS3i) Integrated
Time - Set Machine Security System (MSS3i) Integrated
Factory Password - Obtain Machine Security System (MSS3i) Integrated
Configuration Machine Security System (MSS3i) Integrated
Machine Security System - Uninstall Machine Security System (MSS3i) Integrated
Glossary of Terms Machine Security System (MSS3i) Integrated

CID 1639 FMI 02 Machine Security System incorrect C7 and C9 Engines for Caterpillar Built Machines
CID 1639 FMI 09 Machine Security System Module not communicating on link C7 and C9 Engines for Caterpillar Built Machines
MID 039 - CID 0041 - FMI 06 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
MID 039 - CID 0254 - FMI 12 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
MID 039 - CID 0262 - FMI 06 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
Diagnostic Code List 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
General Information 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
MID 039 - CID 0246 - FMI 12 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
MID 039 - CID 0247 - FMI 12 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System
MID 039 - CID 0248 - FMI 12 320D, 321D, 323D, 324D, 325D, 326D, 328D, 329D, 330D, 336D, 336D2, 340D and 340D2 Excavators, 324D Forest Machine and 323D MHPU, 324D MHPU, 325D MHPU, 329D MHPU, 330D MHPU and 336D MHPU Mobile Hydraulic Power Units Machine Electronic Control System

New Software for the Auxiliary Hydraulic Circuits Is Available {7610, 7620} 2007/04/16
New Software Is Available for Preventing Failures of the Thumb Cylinder on Certain Excavators {5701, 7610, 7620} 2009/03/16
A New Version of Caterpillar Electronic Technician (ET) is Now Available {0785, 7600, 7610} 2008/05/19
New Software and a New Rotary Switch Improve the Reliability of the Engine Speed Dial on Excavators {1408, 7332, 7610, 7620} 2009/08/10
Updated Machine Software is Available for the Electronics Group {7610, 7620} 2009/09/07
New Firmware Is Now Available for Communications Adapter 3 {7610, 7620} 2011/10/20
An Improvement to the Electronic Control Module is Made on Certain Excavators {1931, 7600} 2011/12/22
Auto Clearing of Diagnostics and Events from Electronic Control Module (ECM) {1901, 1920, 7610, 7620} 2014/01/27
Updated Flash Procedure for All Caterpillar Products {1920, 7610, 7620} 2014/09/16
Machine ECM Software has been Improved for Certain 300D Series Excavators {7610, 7620} 2013/09/20
Cat<SUP>&reg;</SUP> Reman Now Offers Additional Control Modules for Certain Machine Engines {1901, 7610} 2014/10/14
Military Electronic Technician (Military ET) Is Now Available For Military Personnel {0374, 0376, 0599, 1000, 7000, 7610, 7620} Military Electronic Technician (Military ET) Is Now Available For Military Personnel {0374, 0376, 0599, 1000, 7000, 7610, 7620}
New Machine Software Group Is Now Used on Certain Excavators and Mobile Hydraulic Power Units {7610, 7620} New Machine Software Group Is Now Used on Certain Excavators and Mobile Hydraulic Power Units {7610, 7620}


Engine Speed Control



Illustration 1g01153519
Engine Speed Dial


Illustration 2g01215943
(12) Machine ECM
(14) Engine Speed Dial
(32) Monitor
(41) Engine ECM

The Machine ECM converts the signal from the "engine speed dial" into a signal that is pulse width modulated (PWM). The information is then sent to the engine ECM over the Cat Data Link (CDL).

The engine speed dial (14) is divided into ten positions. The dial position is displayed on the character display of the monitor panel. The speed of the engine with no load for each dial position is shown in the following chart.

Table 1
RPM For The Engine Speed Dial Switch
322D, 324D, 325D, 328D, 330D 
"Dial Position"  Engine RPM  Hydraulic Torque (%) 
950  25 
1020  40 
1160  61 
1300  69 
1470  78 
1590  85 
1700  92 
1800  92 
1900  92 
10  1980  100 

Self-Diagnostic Function

The Machine ECM ( (12)) is a self-diagnostic component. The machine ECM monitors the inputs and the outputs. The Machine ECM also monitors for system for problems (warnings) that occur during the operation of the machine. The Machine ECM will display a system warning that is generated or a problem that has been detected via the self-diagnostic function, on the monitor ( (32)). Refer to illustration 2.

Note: A log file is kept for the warnings. The log file contains the time and the number of occurrences of each warning.

Automatic Engine Control (AEC)



Illustration 3g01215945
(1) Switch Panel
(12) Machine ECM
(14) Engine Speed Dial
(19) Implement Pressure Switch
(20) "Travel Right" Pressure Switch
(21) "Travel Left" Pressure Switch
(29) Straight Travel Pressure Switch
(41) Engine ECM

The AEC will lower the engine speed if no load on the machine continues for approximately 5 seconds. This process is designed to reduce the noise and fuel consumption. The AEC has settings in two stages. The AEC can be set by the switch on the right console. The indicator of the switch will illuminate during the second setting of the AEC. The second setting of the AEC is available immediately after the engine start switch is turned to the ON position. The AEC can be set in the first stage and the second stage by alternately pressing the switch.

First Setting Of The AEC

The first setting of the AEC will lower the speed of the setting of the engine speed dial by approximately 100 rpm in the "no load" or the "light load" condition.

Second Setting Of The AEC

The second setting of the AEC will reduce the engine speed to approximately 1300 rpm in the "no load" condition.

Note: When the main backup switch (22) is turned to the ON position (Manual), the "AEC" function is disabled.

One Touch Low Idle



Illustration 4g01215947
(12) Machine ECM
(15) One-touch low idle switch
(19) Implement pressure switch
(20) "Travel Right" pressure switch
(21) "Travel Left" pressure switch
(29) Straight Travel pressure switch
(41) Engine ECM

When the one-touch low idle switch (15) is pressed and the machine is not under a load, the engine speed can be lowered by more than the speed of the setting of the second stage of the AEC. When normal operations have resumed, the engine speed for the dial setting will return the corresponding RPM.

Start Up Of The One Touch Low Idle

The one-touch low idle feature will activate during all "stopped" conditions of the implement, swing, travel, and tools. The following components are in the OFF position: implement swing pressure switch , the travel pressure switch (right), the travel pressure switch (left), the attachment (ATT) pedal pressure switch and the straight travel pressure switch. However, when the one-touch low idle switch is pressed, the control will lower the engine speed to the speed of the "2" setting of the engine speed dial to approximately 1020 rpm. This control overrides the AEC.

Release Of The One Touch Low Idle

The one-touch low idle will be released when any of the following conditions occur:

  • The one-touch low idle switch (15) is pressed again.

  • The implement swing pressure switch is set to the ON position.

  • A travel pressure switch is set to the ON position.

  • A pressure switch that is related to a tool is set to the ON position.

The engine speed is different after the switch has been released. The different speed will depend on the conditions of the release.

  1. The engine speed will be set to the setting of the engine speed dial, when the feature for one-touch low idle has been released by an operation of the implement, swing, and so on.

  2. The engine speed will be set by the AEC. The speed will be set when the one-touch low idle has been released. The engine speed will be affected by the following conditions:

    1. When the first setting of the AEC is selected, the engine speed will be set to the speed of the first setting of the AEC. The speed is approximately 100 rpm lower than the setting of the engine speed dial.

    2. When the second AEC is selected, the engine speed will be set to the speed of the setting of the second AEC. The speed is approximately 1300 rpm.

    3. Engine speed will be set to the speed of the engine speed dial if the engine speed is lower than the setting of the second AEC. The setting of this speed is not based on a setting of the AEC.

Engine Speed Protection

Prevention of Overspeed During Low Engine Oil Pressure



Illustration 5g06020392

This function is designed to prevent the engine from starting at a high speed during a condition of low oil pressure. For example, after the engine oil filter is replaced, the engine may need to run for a short time to fill the oil filter. During this time, the oil pressure of the engine will remain low.

Note: Engine damage may occur if the engine runs at a high-speed dial position and the oil pressure of the engine is low.

The engine speed will be limited to the position of 5, if the engine oil pressure switch is open. The engine will start at the speed of the number 5 position.

Prevention Of Overspeed During Overheating Condition



Illustration 6g06020401

This function is designed to prevent damage to the engine that is caused by overspeed during an overheating condition. The Engine ECM receives input from the "coolant temperature sender" and the Engine ECM communicates this information to the Machine ECM. The Machine ECM receives the input from the hydraulic oil temperature sender.

If the Machine ECM senses an overheating condition is in process, the Machine ECM will send a signal to the "Power Shift PRV" solenoid to destroke the hydraulic pump. A signal will also be sent from the Machine ECM to the Engine ECM to reduce the speed of the engine.

The engine speed will be decreased to the second setting of the AEC (1300 rpm).

Work that requires high pressure will be restricted during an overheating condition. The engine and other components are protected during this condition.

Control Of The Hydraulic Oil At Low Temperatures



Illustration 7g06020454

When the conditions of the climate are cold and the temperature of the hydraulic oil is low, the machine may not operate smoothly.

A signal is sent from the hydraulic oil temperature sensor to the Machine ECM to monitor the temperature of the hydraulic oil.

The output of the pump will decrease by a small amount. This action allows the operations to be smoother until the temperature of the oil rises. When the hydraulic oil temperature sensor has detected an oil temperature below 15 °C (59 °F), the system limits hydraulic pump output pressure to 80% of maximum hydraulic horsepower.

When the hydraulic oil temperature sensor detects an oil temperature that has risen above 20 °C (68 °F), normal control of the hydraulic oil will begin again.

Pump Regulation



Illustration 8g06020457

Constant Control of Horsepower

Constant control of the horsepower is associated with the 1 to 9 setting of the engine speed dial. The flow of the pump is controlled by the power shift pressure when the engine speed dial is in the 1 through 9 position. The hydraulic output will be set according to the position of the engine speed dial. Even though the pump is delivering the maximum flow, the machine ECM will correct the power shift pressure to maintain the maximum amount of flow. During the delivery of middle pressure and high pressure, the horsepower of the main pump is controlled to prevent high horsepower of the pump with lower engine horsepower. The machine ECM receives feedback from the engine speed sensor. The power shift pressure is proportional to the target flow. The target flow is calculated from the setting of the engine speed and the pressure of the delivery pump pressure sensor. Thus, the power shift pressure will vary according to the position of the engine speed dial and the pressure of the delivery pump. The antistall feature for the engine is used to prevent the engine from stalling. The antistall feature will be activated, if the speed of the engine decreases 250 rpm below the position of the dial-in comparison to the setting of the engine speed dial.

The power shift pressure is fixed for the positions of 1 through 9. The positions of 1 through 4 of the engine speed dial have a different power shift pressure for each setting. The engine speed dial will set the desired RPM, which will produce the desired flows. The positions of 7 through 9 of the engine speed dial have a common power shift pressure that is fixed. The positions 1 through 9 use engine speed, the position of the engine speed dial, and the pump pressure to set a fixed output. The output is fixed until a decrease of 250 RPM below the target RPM. At an RPM of 250 below the target RPM, the engine ECM will adjust the power shift pressure to maintain engine RPM within 250 RPM of the target RPM.

Control Of An Underspeed Condition

The underspeed condition is associated with a position of 10 of the engine speed dial. The 10 position of the engine speed dial is used when a large amount of horsepower is required or a high travel speed is requested. An underspeed feature is necessary when the engine is being operated at a maximum horsepower. The underspeed feature will maintain the speed of the engine at maximum power. The machine ECM reads the engine speed and the machine ECM will adjust the power shift pressure to regulate the engine speed. The machine ECM controls the power shift pressure in the underspeed condition. The engine maintains a speed of approximately 1800 rpm to achieve the maximum horsepower. Therefore, when the engine speed is higher than the full load speed, the output of the pump will increase and the power shift pressure will decrease. Also, when the engine speed is lower than the target speed, the output of the pump will decrease and the power shift pressure will increase.

The horsepower of the engine may decrease under the following conditions:

  • The engine becomes worn.

  • The quality of the fuel is poor.

  • The engine is operating at a high altitude.

The machine ECM will decrease the output of the pump and increase the power shift pressure to reduce the load on the engine without reducing the engine speed. This condition occurs if the speed of the engine decreases below full load speed.

Cooling Fan Control (320D-329D)



Illustration 9g01924629

The Engine ECM monitors the temperature sensors of the engine coolant and the inlet air manifold. The Machine ECM monitors the temperature sensor for the hydraulic oil.

Based on the values of these sensors the Machine ECM will vary the amount of current to the electronic control coil of the fan.

As the current to the "fan control" coil is increased, increased magnetic flux produces a rotational movement to the "fluid control valve" armature. As the fluid control valve rotates, the valve arm closes the large hole in the fluid reservoir allowing less fluid to flow into the working chamber of the visconic fan clutch. The increase in magnetic flux to the fluid valve armature causes the armature to rotate as the outer blades of the armature try to align with the steel bars in the reservoir cover.

A fan speed map within the software of the Machine ECM will compare temperature sensor readings with the desired fan speed map and plot target fan speed according to engine rpm and current fan speed.

If only one sensor is reporting high temperature, or a need for increased cooling, the Machine ECM will reduce the current to the fan control coil by a predetermined percentage of the fan speed map, and the fan speed will increase.

Cooling Fan Control (330D and 336D)



Illustration 10g06020462

The inputs for the cooling fan speed are monitored by the Machine ECM and the Engine ECM. The Machine ECM detects the temperature of the hydraulic oil. The Engine ECM detects the temperature of the engine coolant and the temperature at the Intake Manifold. A target speed for the cooling fan is assigned for each engine speed based on the output of the various temperature sensors. The target values for the maximum fan speeds are assigned by software designed for the 330D/336D machine models.

The Machine ECM monitors the temperature inputs to provide a signal to the (proportional) fan pump pressure control solenoid. Maximum flow is sent to the fan motor, causing the fan to turn at the maximum software controlled rpm, when the solenoid receives minimum current from the Machine ECM.

When maximum fan speed is required, the fan pump pressure control solenoid is de-energized according to the temperature input, causing the fan to turn at a faster speed. Maximum controlled fan speed is attained when the fan pump pressure control solenoid receives the least amount of current from the Machine ECM.

If communication is lost between the Machine ECM and the "fan pump pressure control" solenoid, the fan will default to the maximum mechanical pressure setting (high-pressure cutoff). This action results in a higher system pressure of approximately 31000 kPa (4500 psi). This pressure is higher than the maximum pressure that is controlled through the software. The fan speed is also higher than the maximum fan speed that is normally controlled through the software.

Cat ET or the monitor can be used to check or to calibrate the fan speed. Refer to the 330D/336D Test and Adjust manual for the calibration procedures.

Travel Speed - Hydraulic Circuit Change Control



Illustration 11g01216045
(1) Switch Panel
(12) Machine ECM
(17) No. 1 Pump Pressure Sensor
(18) No. 2 Pump Pressure Sensor
(20) "Travel Right" Pressure Switch
(21) "Travel Left" Pressure Switch
(24) "Travel Speed Change" solenoid

Automatic Travel Speed Change

There are two travel speed modes, low-speed (tortoise) and high-speed (rabbit). By selecting the "tortoise" mode, travel speed is limited to the low travel speed. By selecting the "rabbit" mode, travel speed will change automatically between low/high speeds. The change in travel speed depends on the delivery pressure of the pump.



Illustration 12g01159856
"Travel Mode Selector" switch-on Switch Panel

Travel Mode selector switch- The "Travel Mode Selector" switch and travel mode indicators (tortoise and rabbit) are on the switch panel. When the "Travel Mode Selector" switch is pressed, the travel mode can be set to the rabbit mode or set to the tortoise mode. The indicator (tortoise or rabbit) will be illuminated to show the travel mode that is chosen.

Automatic travel speed change function- The travel speed will automatically be set to the LOW (tortoise) speed when the machine is first turned on. To select the HIGH (rabbit) speed mode, press the "Travel Mode Selector" switch. Although the circuit pressure at the pump output remains below a certain range, the machine will travel in the HIGH (rabbit) speed. The output pressure of the pump increases as the load on the machine increases. When the output pressure increases to a certain high level, the machine will automatically shift to travel in the LOW (tortoise) speed mode. The machine will automatically return to the HIGH (rabbit) speed mode when the pump output pressure decreases to the predetermined range.

The "Automatic Travel Speed Change" function allows the machine to adjust speeds without direct operator input. The machine will travel at HIGH (rabbit) speed under a light load. The machine will travel at LOW (tortoise) speed under a heavy load. This function ensures that the machine has high mobility and a high drawbar pull.

The travel speed will remain in LOW (tortoise) speed mode while the machine is in the heavy lift mode.

When the travel is set to the tortoise mode, the travel is set at low speed and does not change.

Swing Brake Operation



Illustration 13g01216047
(1) Switch Panel
(9) Fine Swing Switch
(12) Machine ECM
(19) Implement Pressure Switch
(20) "Travel Right" Pressure Switch
(21) "Travel Left" Pressure Switch
(23) "Swing Brake Release" solenoid
(45) Hydraulic Activation Control Lever (Unlocked Position)
(46) "Hydraulic Activation Control" solenoid
(47) Pilot Pressure for Swing Brake Release
(48) Fine Swing Solenoid

This machine is equipped with a swing lock system that is hydraulically controlled. The system circuit for the "swing lock control" provides control for the swing motor, the swing brake, the fine swing function, and the backup system of the machine.

The "swing brake release" is controlled by the hydraulic activation lever (45). When the hydraulic activation control lever (45) is moved to the locked position, the swing brake is applied. The swing brake solenoid is energized to release the swing brake. The swing brake solenoid (23) is de-energized approximately 6.5 seconds after all levers and pedals are returned to NEUTRAL position.

The swing brake is released immediately on the operation of any of the following: boom, stick, bucket, swing, and an attachment.

If the main backup switch is placed in the Manual position, then the swing brake is electrically released.

Fine swing function (optional) is designed to open a hydraulic circuit between the A and B ports of the swing motor for smooth start and stop operation in swing movement.

The machine ECM detects operation of the fine swing switch to release the swing brake.

Heavy Lift Mode (Optional)



Illustration 14g01216238
(1) Switch Panel
(12) Machine ECM
(28) Heavy Lift Solenoid
(41) Engine ECM


Illustration 15g01159919
"Heavy Lift Mode" switch-on Switch Panel

Refer to illustrations 14 and 15. Press the "Heavy Lift" switch on the "Switch Panel", to turn the heavy lift mode ON or OFF. When the heavy lift mode is turned ON, the indicator will illuminate. When the heavy lift mode is turned ON, the main relief pressure increases from 35 MPa (5100 psi) to 36 MPa (5200 psi). However, due to the flow restriction, the maximum engine speed is limited at the speed equivalent to engine speed dial position 6 which is approximately 1600 rpm. The hydraulic output is restricted at 64%.

Tool Control

When an attachment tool is being operated, the engine speed and the pump flow are controlled according to the type of tool. For more information, refer to the appropriate service manual for the tool control of the machine that is being serviced.

Selection Of A Tool

There are five preprogrammed tools. The operator selects the tool. The monitor is used to make the selection. The following items are examples of some parameters which can be adjusted to accommodate a particular tool:

  • The engine speed dial setting

  • Pump flow for one or two pumps

  • Pump flow for one or two directions

  • The horsepower setting for the attachment pump

Engine Speed Control

When the pedal is operated, the actual setting of the engine speed dial is compared to the position of the engine speed dial that was set by the parameter. The engine speed control will lower the engine speed to the selected engine speed that was set in the adjustable parameter.

When the tool is deactivated, the speed of the engine will return to the actual speed of the setting of the engine speed dial.

When the attachment tool is being operated, the AEC and the one touch low idle are released.

Note: If the programmed value is higher than the engine speed dial indicator, the engine speed will not be raised.

Main Pump Flow Control

Some tools use the flow of the main pump. A pressure switch detects the pressure change. A proportional reducing valve restricts the main pump flow. A resolver valve selects the higher pressure between the pressure in the control valve and the pressure from the proportional reducing valve. This signal restricts the pump flow to a lower pressure. The main pump flow is then reduced.

This process results in better simultaneous operation of the tool and operation of the implement.

Main Pump Control During Use Of The Auxiliary Pump

The Machine ECM detects an attachment pump operation and offsets the load of the attachment pump. This process also prevents a decrease of the engine speed. If an attachment pump is operated with 50 percent of the rated load and the main pumps are operated at the same time, a reduction in engine speed is prevented.

Backup System



Illustration 16g01649056

The “Backup System” has been installed to allow manual control for the operator for a limited number of machine functions so to move a machine if other machine functions have failed.

The main backup switch is located to the right rear of the console. When the main backup switch is turned to the MAN position, the viscous fan speed is set to maximum, the power to the Machine ECM is removed and the "Limited Mobility Mode" is activated. (See operator display above.) The hydraulic flow of the machine is greatly reduced however the joysticks and the travel pedal will continue to function. Despite limited flow from the pump of the machine, the operator will be able to move the machine or the implements of the machine for a limited amount of time. The engine speed dial on the switch panel of the right console does not function. The engine speed can be adjusted by the speed switches that are located to the right rear of the console. Currently, the AEC and the low idle switch will not function. The Monitoring System will display the message "LIMITED MOBILITY MODE" on the Monitoring System and the Monitoring System will sound the action alarm. The backup switch provides the minimum machine functions. The "Limited Mobility Mode" allows the operator to maneuver the machine to the shop when the Machine ECM has failed. Excavating operations are not possible if the machine is in the "Limited Mobility Mode".

Pump Torque Control

When "Pump Toque Control" is selected, the engine output is approximately 60% to 80% of the rated output for the engine. The power shift pressure is fixed. When the engine speed dial of the machine is set to a lower position, the engine output decreases significantly. Care must be taken not to stall the engine.

Release Function of Swing Brake

The swing brake is released under normal operating circumstances.

When the hydraulic system is disabled due to a stopped engine or the hydraulic activation control lever is moved to the locked position, the swing brake will be applied.

Monitoring System

The monitoring system is an input and an output of the Machine Control System. The Machine Control System communicates back and forth on the CAN Data Link. The monitoring system consists of the following components: display with numerous screens and menus, keypad, indicators, and gauges. These components will be described throughout this manual.

The monitoring system informs the operator of the status of the machine. The monitoring system includes a graphic display that allows the operator to view information that pertains to machine functions. Refer to Illustration 17.



Illustration 17g01159235
Monitoring System Display
(55) Action Lamp
(56) Clock
(57) Engine Speed Dial Indicator
(58) Fuel Gauge
(59) Hydraulic Oil Temperature Gauge
(60) Engine Coolant Temperature Gauge
(61) Keypad

The monitoring system display will display various warnings and information about the condition of the machine. The monitoring system display has 3 gauges and several alert indicators. Each gauge is dedicated to a parameter within a machine system. The monitoring system will allow the user to do the following:

  • View system status information

  • View parameters

  • View service intervals

  • Perform calibrations

  • Troubleshoot machine systems

Some of the possible parameters of the machine systems are listed: fuel level, engine coolant temperature, and hydraulic oil temperature. The gauges receive information from sensors or senders that are connected to the ECM. The ECM uses the information from each sensor input to calculate the value that is shown on the gauges.

The alert indicators will notify the operator of an abnormal condition in a machine system. The ECM uses information from pressure switches, sensors, and other inputs to determine when an abnormal condition is present. The ECM will send a message to the monitoring system display. Then, the monitoring system will display a pop-up alert indicator for the machine system with the abnormal condition.



Illustration 18g01159236
Keypad
(62) Up key
(63) Right key
(64) Home key
(65) Main menu key
(66) Left key
(67) Down key
(68) Cancel key or Back key
(69) OK key

The keypad (61) is used to provide input and to navigate through the menu structure of the monitoring system. Refer to Illustration 18.

See Service Manual, RENR8068, "Monitoring System"

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