TM 5-3810-307-24-1-1
Direct/General Support Troubleshooting - Continued
SYMPTOM
PROBABLE CAUSE
CORRECTIVE ACTION
2. Leakage at fittings.
a. Fitting port burred.
a. Stone or file flat.
b. Cracked casting.
b. Replace casting.
3. Loss in speed under load.
a. Low inlet pressure.
a. Check pressure and adjust as
necessary.
b. Excessive back pressure at
b. Check line for proper size.
outlet.
Replace as necessary
c. Scored port plate or end
c. Relap flat to clean up.
cap.
4. Poor speed control.
a. Defective pump.
a. Repair or replace pump.
b. Worn rotating group.
b. Replace rotating group.
5. Motor fails to start
a. Insufficient torque.
a. Increase relief valve pressure
turning.
setting.
b. Excessive motor leakage.
b. Check flow from motor outlet. If
excessive, check shuttle valve
in front port plate. Pressure not
loading plate causing plate to
move away from cam ring.
Replace defective parts.
c. Worn port plates.
c. Replace port plates.
d. Worn rotating group.
d. Replace rotating group.
e. Defective o-ring on OD of
e. Replace damaged o-ring.
front port plate.
f. Defective pump.
f. Repair or replace pump.
g. Motor defective.
g. Repair or replace motor.
6. Shaft play.
a. Worn bearings.
a. Replace bearings.
b. Hammering coupling on
b. Coupling bore should be slip fit
shaft.
on shaft. Repair as necessary.
1-5-30
