SECTION V: TROUBLESHOOTING
TM 9-2350-256-20
Item
Problem
Hoisting Boom-
3
cont.
4
Spade
Main Hydraulic
1
Insufficient or no main system oil pressure.
System
2
Loss of main hydraulic pressure during operation
Auxiliary
1
Insufficient or no auxiliary system oil pressure.
Hydraulic
2
Loss of auxiliary hydraulic pressure during operation
System
3
Main and hoist winches fail to operate.
APU
1
2
3
4
5
6
7
8
9
Main Hydraulic
Pump
Auxiliary
Hydraulic Pump
Mechanical
Transmission-
Hydraulic
c. ELECTRICAL
Item
Problem
Battery Power
Circuit
Master Relay
System and Slave
Receptacle
Hoisting boom creeps.
Boom stayline cables become slack during 1ive boom operation.
1
Spade fails to operate.
2
Spade operates with difficulty.
3
Spade creeps.
Engine fails to crank when starting switch is operated.
Engine cranks but fails to start.
Engine hard to start.
Engine hard to start in cold weather.
Engine starts but fails to keep running, misfires, or lacks power.
Engine overheating.
Engine discharges black smoke.
Engine knocks.
Engine uses excessive oil and discharges light blue smoky exhaust.
1
Main hydraulic pump fails to operate.
2
Main hydraulic pump fails to develop sufficient pressure.
3
Main hydraulic pump is noisy during operation.
Auxiliary hydraulic pump does not operate
Mechanical transmission fails to operate, slips, or chatters.
Battery-Generator gage indicates low battery charge
1
Master relay fails to operate.
2
No power to slave receptacle.
Solution or
Reference
See Page 2-45
See page 2-45
See page 2-48
See page 2-48
See page 2-48
See page 2-49
See page 2-49
See page 2-51
See page 2-51
see page 2-51
See page 2-52
See page 2-52
See page 3-52
See page 2-52
See page 2-52
See page 2-52
See page 2-52
See page 2-52
See page 2-52
See page 2-53
See page 2-53
See page 2-53
See page 2-55
See page 2-56
Solution or
Reference
See page 2-58
See page 2-60
See page 2-60
Change 1
2-36.1
