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TM 10-3930-638-24&P
DIRECT SUPPORT MAINTENANCE PROCEDURES
CHAPTER OVERVIEW
The purpose of this chapter is to provide you with all needed
instructions and additional information to help you at the direct
support level keep the equipment in good repair.
3-1. CHAPTER INDEX
Page
Title
Section
Engine. Fuel and Cooling Systems Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
I
Electrical System Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-88
II
Power Train Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-123
III
Steering System Maintenance.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-152
IV
Chassis Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-190
V
Hydraulic Lift System Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-194
VI
Section I. ENGINE, FUEL AND COOLING SYSTEMS MAINTENANCE
This section contains the information you need to maintain the:
Engine
Fuel system
Radiator and shroud
It gives you instructions on how to troubleshoot problems and repair
or replace the components that are within the scope of direct
support maintenance.
Para
Troubleshooting Symptom Index . . . . . . . . . . . . . . . 3-2
Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 3-3
Flywheel Housing . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel System Troubleshooting . . . . . . . . . . . . . . . . . . 3-4
Rocker Arm Cover . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Rocker Arm Assembly . . . . . . . . . . . . . . . . . . . . . .
Oil Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Tune-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5a
Fuel System Maintenance . . . . . . . . . . . . . . . . . . . . .
Engine Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5b
Fuel Injection Lines and Fittings . . . . . . . . . . . . .
Power Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5c
Fuel Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separation of Engine and Transmission . . . . . . . 3-5d
Fuel Injection Pump . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5e
Radiator and Shroud Maintenance . . . . . . . . . . . . .
Tachometer Drive . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5f
3-2. TROUBLESHOOTING SYMPTOM INDEX
Page
Para/Malfunction
ENGINE TROUBLESHOOTING
Engine hard to start or will not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine hard to start or will not start (exhaust smoke) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine starts but will not run. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine misfires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine stalls frequently or does not develop full power . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine knocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine compression test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL SYSTEM TROUBLESHOOTING
Engine idle speed incorrect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine no-load governed speed incorrect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine hard to start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine starts and stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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