Caterpillar 320 330 Excavator Electronic Service Manual
320/330 HYDRAULIC EXCAVATORS
ELECTRONIC CONTROL UNIT
MEETING GUIDE 621 SLIDES AND SCRIPT
AUDIENCE
Level II – Caterpillar Service personnel who understand the principles of machine systems operation, diagnostic equipment, and procedures for testing and adjusting.
CONTENT
This presentation contains the information and visuals necessary to develop a Level II course of instruction on the Electronic Control Unit (ECU) for the 320, 320L, 320N, 330, and 330L Hydraulic Excavators. Emphasis is placed on explaining how the ECU and Monitor Panel function. The Data and Calibration Modes of the system are also explained in detail.
OBJECTIVES
After learning the information in this presentation, the serviceman will be able to:
- locate and identify the major components of the ECU and monitor panel system;
- identify all input and output signals for the ECU and monitor panel;
- explain the function and operation of each major component; and
- explain and demonstrate how to access the built-in diagnostic procedures.
REFERENCES
320, 320L and 320N Excavators Service Manual (3116 Engine with Bent Axis Pump) SENR5450
320, 320L and 320N Excavators Service Manual (3066 Engine with Swashplate Pump) SENR5465
320, 320L and 320N Excavators Hydraulic and Electronic Systems Testing and Adjusting SENR5473
320, 320L and 320N Excavators Parts Book SEBP2034
330 and 330L Excavators Service Manual SENR5490
330 and 330L Excavators Hydraulic and Electronic Systems Testing and Adjusting SENR5496
330 and 330L Excavators Parts Book SEBP2171
PREREQUISITES
Caterpillar Hydraulics Course (or equivalent) SEGV2519
STMG 546 “Graphic Fluid Power Symbols” SESV1546
STMG 584 “Electronic Power Unit Control for E-Series Hydraulic Excavators” SESV1584
SUPPLEMENTARY TRAINING MATERIAL
STMG 619 “320/330 Hydraulic Excavator–Pumps and Pump Controls” SESV1619
STMG 620 “320/330 Hydraulic Excavator–Hydraulic Systems Operation” SESV1620
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