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 25 of 327
TM 9-2350-238-34-2
2-4. TROUBLESHOOTING INFORMATION (CONT).
Table 2-1. DIRECT SUPPORT TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
BOOM (CONT)
20. BOOM DROPS WHEN HOLDING LOAD IN NEUTRAL POSITION.
Make sure all personnel stand clear when operating the
boom to avoid injury to personnel.
Step 1.
Test boom for acceptable boom drop rates. Refer to page 2-84.
If drop rate is faster than acceptable limits, go to step 2.
Step
2. Check for leaking boom winch control cylinders.
Replace or repair leaking boom winch control cylinders. Refer to
page 2-84. Recheck boom drop rate. Refer to page 2-84.
Step
3. Check for leaks in hydraulic lines and hoses.
Tighten all loose connections. Replace damaged hydraulic lines
and hoses. Refer to TM 9-2350-238-20-2. Recheck boom drop
rate. Refer to page 2-84.
Step 4.
Check for leaks around counterbalance manifold pressure relief valves.
If leaks are found, replace damaged preformed packings. Refer
to page 2-154. Recheck boom drop rate. Refer to page 2-84.
Step
5. Check adjustment of boom cylinder counterbalance valve. Refer to page
2-179.
If boom cylinder counterbalance valve cannot be adjusted,
replace or repair pressure relief valve. Refer to page 2-163.
Recheck boom drop rate. Refer to page 2-84.
Step
6. 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. Recheck boom drop rate. Refer to page 2-84.
2-12
Back to Top
