TM 5-3810-306-34
TABLE 3-1. DIRECT AND GENERAL SUPPORT TROUBLESHOOTING (CONTD)
Malfunction
Test or Inspection
Corrective Action
65.
HOIST MOTOR FAILS TO START TURNING
Step 1. Excessive motor leakage.
a.
Install flow meter in motor outlet and check flow. If 50 gpm check shuttle valve in front port plate. Pressure
not loading plate causing plate to move away from cam ring.
b.
Repair hoist motor. (Refer to page 15-54.)
Step 2. Worn port plates.
a.
Repair hoist motor. (Refer to page 15-54.)
Step 3. Worn cam ring assembly.
a.
Repair hoist motor. (Refer to page 15-54.)
Step 4. Defective preformed packing on OD of front port plate.
a.
Replace preformed packing. (Refer to page 15-54.)
Step 5. Defective hoist motor.
a.
Replace hoist motor. (Refer to page 15-50.)
66.
HOIST MOTOR SHAFT PLAY
Step 1. Worn bearings.
a.
Disassemble hoist motor and replace bearings. (Refer to page 15-54.)
Step 2. Hammering coupling on shaft.
a.
Coupling bore should be slip fit on shaft.
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