TM-9-2350-238-34-2
CRANE (CAB) COMPONENTS, RECOVERY VEHICLE, FULL TRACKED: LIGHT, ARMORED, M578
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
APRIL 1992
TM-9-2350-238-34-2 - Page 24 of 327
TM 9-2350 -238-34-2
Table 2-1. DIRECT SUPPORT TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
16. BOOM RAISES BUT WILL NOT LOWER.
Step 1.
Check adjustment of pressure relief valve. Refer to page 2-163.
If pressure relief valve cannot be adjusted, replace or repair
pressure relief valve. Refer to page 2-154.
Step
2.
Check for damaged check valve.
17.
BOOM LOWERS BUT
Replace or repair damaged boom cylinder check valve. Refer to
page 2-154.
WILL NOT RAISE.
Close boom cylinder hydraulic stop-check valve at counterbalance manifold.
If boom still will not raise, replace boom cylinder hydraulic stop-
check valve. Refer to page 2-154.
18. BOOM OPERATES SLUGGISHLY WHEN RAISING AND LOWERING.
Step 1.
Check for leaks and damaged or clogged hydraulic lines
Tighten all loose connections. Replace damaged
and hoses, Refer to TM 9-2350-238-20-2.
and hoses.
hydraulic lines
Step
2. Check boom winch control cylinders for damage and leaks.
Replace or repair damaged or leaking boom winch control
cylinders. Refer to page 2-84.
19. BOOM OPERATES SLUGGISHLY IN RAISING.
Check adjustment of boom cylinder pressure relief valve. Refer to page 2-179.
If boom cylinder pressure relief valve cannot be adjusted,
replace or repair boom cylinder pressure relief valve. Refer to
page 2-154.
2-11
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