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 TM 55-1905-223-24-16
Table 2-2. Troubleshooting
Malfunction
Test or Inspection
Corrective Action
STEP 7. Check for defective hydraulic motor assembly (Item 18, PMCS Table).
Replace hydraulic motor assembly (para. 2-15).
6. Hydraulic fluid does not flow.
STEP 1.
Check to see if hydraulic pump is receiving hydraulic fluid.
a.
Clean or replace air breather filter (para. 2-17).
b.
Clean or replace suction strainer or filter (para. 2-17).
c.
Make sure hydraulic fluid level is at the full mark.
d.
Check coupling between the motor and pump (Item 8, PMCS).
STEP 2. Check for defective alternating current motor.
a. Make sure power source and electrical wiring is connected properly.
b. Replace alternating current motor (para. 2-17).
STEP 3. Check to see if alternating current motor is turning in the wrong direction.
Reverse rotation of alternating current motor (para.
STEP 4. Check for correct relief valve setting.
Adjust pressure relief valve (para.
STEP 5. Check for defective hydraulic pump. Listen for unusual noise and check system pressure gauge.
Replace hydraulic pump (para. 2-17).
7. Hydraulic fluid has low flow. Winch turns slower than normal speed.
STEP 1. Check for correct relief valve setting (2900 psi).
Adjust relief valve (para. 2-13).
STEP 2. Check for defective hydraulic pump.
Replace hydraulic pump (para. 2-17).
STEP 3. Check for external leaks in hydraulic system.
Secure all fittings and connections.
8. Hydraulic fluid bas excessive flow. Winch turns faster than normal speed.
STEP 1. Check for correct relief valve setting (2900 psi).
Adjust relief valve (para. 2-13).
9. Hydraulic pump is noisy.
STEP 1. Check for cavitation (vacuums in hydraulic fluid).
a. Clean or replace air breather filter (para. 2-17).
b. Clean or replace suction strainer or filter (para. 2-17).
2-19
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