TM 5-3810-306-34
TABLE 3-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (CONTD)
Malfunction
Test or Inspection
Corrective Action
57.
ERRATIC HOIST OPERATION UP
Step 1. Defective hoist motor.
a.
Disconnect line to brake release port. Plug and cap line. Disconnect exhaust (for the down circuit) lines
from each motor and cap lines. Pressurize line and examine exhaust port for excessive leakage.
b.
Replace defective motor. (Refer to page 15-50.)
58.
LEAKING HOIST MOTOR CONTROL VALVE SEALS
Step 1. Paint on or under seal.
a.
Remove and clean, as necessary. (Refer to page 15- 60.)
Step 2. Dirt under seal.
a.
Remove and clean, as necessary. (Refer to page 15- 60.)
Step 3. Scored spool.
a.
Replace valve. (Refer to page 15-60.)
Step 4. Loose seal plates.
a.
Clean and tighten plates.
Step 5. Cut or scored seal.
a.
Replace faulty parts.
3-40
