TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
55. SLOW HOIST OPERATION UP
Step 1.
Defective main hydraulic relief valve.
a. Check relief valve adjustment. (Refer to page 16-54.)
If OK, do Step 2.
b. Contact Direct Support Maintenance to replace
hydraulic relief valve.
Step 2.
Defective hydraulic pump.
a. Contact Direct Support Maintenance.
56. ERRATIC HOIST OPERATION DOWN
Step 1.
Air in brake release line.
a. Bleed pilot pressure line going into hoist brake
housing.
Step 2.
Defective main hydraulic relief valve.
a. Check relief valve adjustment. (Refer to page 16-54.)
If OK, do Step 3.
b. Contact Direct Support Maintenance to replace relief
valve.
Step 3.
Defective hoist.
a. Contact Direct Support Maintenance.
57. STICKING SPOOL IN HOIST CONTROL VALVE
Step 1.
Hoist control valve warped from mounting.
a. Remove and inspect hoist control valve. If OK, do
Step 2.
b. Replace hoist control valve. (Refer to page 16-2.)
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