TM 5-3810-306-20
SYMPTOM INDEX
Malfunction
Troubleshooting
Procedures
Page
COOLING SYSTEM
Coolant temperature above normal .............................................................................................................................3-19
Coolant loss .................................................................................................................................................................3-20
Coolant temperature below normal..............................................................................................................................3-21
Contaminated coolant..................................................................................................................................................3-21
ELECTRICAL SYSTEM
Alternator not charging or insufficient charging ...........................................................................................................3-22
TRANSMISSION/TORQUE CONVERTER
Crane will not move or moves erratically-
transmission failure...................................................................................................................................................3-23
Brakes are poor or do not apply...................................................................................................................................3-24
Uneven braking or lining wear .....................................................................................................................................3-25
STEERING SYSTEM
Hard to steer left or right ..............................................................................................................................................3-25
Hard to steer either left or right ....................................................................................................................................3-26
Rear steering inoperative.............................................................................................................................................3-26
Noisy emergency steer pump ......................................................................................................................................3-27
Emergency steer pump does not operate....................................................................................................................3-27
HYDRAULIC SYSTEM
Foaming hydraulic oil...................................................................................................................................................3-27
Slow or erratic operation of outrigger extension ..........................................................................................................3-28
cylinders
Outrigger vertical jack cylinder slow or erratic .............................................................................................................3-30
Outrigger jack cylinder retracts under load ..................................................................................................................3-31
Jack cylinder extends without being activated.............................................................................................................3-31
Outriggers will not operate...........................................................................................................................................3-31
Outriggers operate, but selected outrigger will not
retract or extend .......................................................................................................................................................3-32
Two outriggers activate from single control switch ......................................................................................................3-33
Boom raises erratically.................................................................................................................................................3-33
Boom lowers erratically................................................................................................................................................3-34
Boom raises slowly ......................................................................................................................................................3-34
Boom lowers slowly......................................................................................................................................................3-35
Boom will not raise.......................................................................................................................................................3-36
Boom will not lower ......................................................................................................................................................3-37
3-2
