Komatsu PC308USLC-3E0 Excavator Shop Manual SEN00964-08 PDF

SEN00964-08 PC308USLC-3E0 1
00 Index and Foreward 3
Composition of Shop Manual 4
Table of Contents 6
00 Foreward and General Information 15
Safety Notice 16
How to read the Shop Manual 21
Explanation of terms for maintenance standard 23
01 Specification and technical data 57
Specification dimension drawing 58
Specifications 60
Weight table 63
10 Structure Function and Maintenance Standard 67
Engine and Cooling System 68
Power Train 71
Undercarriage and Frame 83
Hydraulic System, Part 1 95
Hydraulic System, Part 2 123
Hydraulic System, Part 3 187
Work Equipment 235
Cab and its attachments 243
Electrical System 247
20 Standard Value table 307
Engine related parts 308
Chassis related parts 309
30 Testing and Adjusting 321
Testing and Adjusting Part 1 321
Tools for testing 323
Testing engine speed 328
Testing air boost pressure 329
Testing exhaust gas color 330
Adjusting valve clearance 332
Testing compression pressure 334
Testing blow-by pressure 337
Testing and Adjusting Part 2 383
Special functions of machine monitor 384
40 Troubleshooting 427
Failure Code Table and Fuse locations 427
Failure Code Table 428
Fuse locations 432
General Information on Troubleshooting 435
Points to Remember 436
Checks before Troubleshooting 438
Connection table for connector pin numbers 445
Adapter Table 481
Troubleshooting by failure code, Part 1 485
Troubleshooting by failure code, Part 2 541
Troubleshooting by failure code, Part 3 605
Troubleshooting of Electrical System 663
Troubleshooting of hydraulic and mechanical system 723
Troubleshooting of Engine 757
50 Disassembly and assembly 781
General information on disassembly adn assembly 781
Engine and cooling system 795
Power Train 841
Undercarriage and Frame 863
Hydraulic system 881
Work Equipment 911
Cab and its attachments 917
Electrical system 935
90 Diagrams and Drawings 947
Hydraulic Diagrams 947
Hydraulic Diagrams 949
Electric Diagrams 951
Electric Diagrams 953

How to read the shop manual 
1. Composition of shop manual
This shop manual contains the necessary technical information for services performed in a workshop.
For ease of understanding, the manual is divided into the following sections.
00. Index and foreword
This section explains the shop manuals list, table of contents, safety, and basic information.
01. Specification
This section explains the specifications of the machine.
10. Structure, function and maintenance standard
This section explains the structure, function, and maintenance standard values of each component.
The structure and function sub-section explains the structure and function of each component. It
serves not only to give an understanding of the structure, but also serves as reference material for
troubleshooting. The maintenance standard sub-section explains the criteria and remedies for disassembly
and service.
20. Standard value table
This section explains the standard values for new machine and judgement criteria for testing,
adjusting, and troubleshooting. This standard value table is used to check the standard values in
testing and adjusting and to judge parts in troubleshooting.
30. Testing and adjusting
This section explains measuring instruments and measuring methods for testing and adjusting, and
method of adjusting each part. The standard values and judgement criteria for testing and adjusting
are explained in Testing and adjusting.
40. Troubleshooting
This section explains how to find out failed parts and how to repair them. The troubleshooting is
divided by failure modes. The “S mode” of the troubleshooting related to the engine may be also
explained in the Chassis volume and Engine volume. In this case, see the Chassis volume.
50. Disassembly and assembly
This section explains the special tools and procedures for removing, installing, disassembling, and
assembling each component, as well as precautions for them. In addition, tightening torque and
quantity and weight of coating material, oil, grease, and coolant necessary for the work are also
explained.
90. Diagrams and drawings (chassis volume)/Repair and replacement of parts (engine volume)
q Chassis volume
This section gives hydraulic circuit diagrams and electrical circuit diagrams.
q Engine volume
This section explains the method of reproducing, repairing, and replacing parts.