Catterpillar Service Training

SERV7105-06 June 2005 Vol. 6, No. 1

SERVICE TRAINING
TECHNICAL PRESENTATION

345C HYDRAULIC EXCAVATOR

New Product Introduction (NPI)

345C HYDRAULIC EXCAVATOR
AUDIENCE
Service personnel who understand the principles of machine systems operation, diagnostic equipment, and testing and adjusting procedures.

CONTENT
This presentation provides new and different New ProductIntroduction (NPI) information on the 345C Hydraulic Excavator. This presentation may be used for self-paced and self-directed training.

OBJECTIVES
After learning the information in this presentation, the serviceman will be able to: 1. locate and identify the new major components on the 345C Hydraulic Excavator;and 2. explain the operation of the new component in the system.

REFERENCES
345CHydraulic Excavator Specalog 345C Hydraulic Excavator Specifications Manual 345C Hydraulic Excavator Systems Operations Manual 345C Hydraulic Excavator Test and Adjust Manual 345C Hydraulic Excavator Parts Book AEHQ6521-01 RENR7283-00 RENR7324-02 RENR7325-01 SEBP4205-00

Estimated Time: 1 Hour Illustrations: 36 Handouts: 2 Form: SERV7105-06 Date: 06/05
© 2005 Caterpillar Inc.

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NPI

TABLE OF CONTENTS
INTRODUCTION ..................................................................................................................5 Similarities and Differences .............................................................................................6 MACHINE WALK-AROUND...............................................................................................7OPERATOR'S STATION......................................................................................................13 ENGINE................................................................................................................................23 HYDRAULIC SYSTEM ......................................................................................................24 Hydraulic PilotPump .....................................................................................................25 MAIN HYDRAULIC SYSTEM ..........................................................................................27 FAN SYSTEM ......................................................................................................................38 MAINTENANCE ITEMS....................................................................................................41 TOOL CONTROL SYSTEM ...............................................................................................42 CONCLUSION.....................................................................................................................43 HYDRAULIC COLOR CODESCHEMATIC.....................................................................44 HANDOUTS.........................................................................................................................44

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NOTES

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345C HYDRAULIC EXCAVATORS

© 2005 Caterpillar Inc.

1

INTRODUCTION The 345C is a new model from Caterpillar. It is a direct replacement for the 345BSeries II Hydraulic Excavator. The 345C was introduced in March 2005. The 345C operating weight is approximately 44,970 Kg (99,150 lbs) for a Standard Machine. The 345C fits in the 45 metric ton class of excavators. The 345C is a versatile machine capable of performing a wide range of tasks by using various work tools available. The presentation discusses the component locations and systemsoperation of the 345C Hydraulic Excavator. Basic engine and machine component locations will be discussed. Power train, and the implement hydraulics will also be covered. There are three basic machine arrangements available in the North American market. - 345C L (345C excavator with a long, fixed width undercarriage) - 345C LVG (345C excavator with a long, variable gauge undercarriage) - 345C LWVG (345C...