TM 10-3835-223-13&P
Table 4-2. Unit Troubleshooting - cont.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. DRIVE WHEEL (CYLINDER) MOVED IN ONE DIRECTION, BUT WILL NOT RETURN - cont.
Step 2. Inspect power pack control cable jack for bent, broken or missing pins
If pin (s) are bent, broken or missing, notify Direct Support Maintenance.
Step 3. Check for defective control cable.
a. Remove control cable from power pack (para. 4-13).
b. Depress and hold RUN switch (S1).
c. Set switch S4 to LEFT. Using multimeter, check for continuity between pins F and J of
control cable plug. If continuity does not exist, replace control cable (para. 4-13).
d. Set switch S4 to RIGHT. Using multimeter, check for continuity between pins C and J of
control cable plug. If continuity does not exist, replace control cable (para. 4-13).
Ifmalfunction cannot be corrected, replace valve station (para. 4-17).
6. DRIVE WHEEL (CYLINDER) MOVES VERY SLOWLY.
Step 1. Check for loose or defective quick disconnect couplings.
a. Reconnect couplings.
b. If required, replace damaged or defective couplings (para. 4-17).
Step 2. Check hydraulic cylinder for internal leakage.
a. Operate hose reel and position drive wheel to right reel.
b. Disconnect hydraulic hose from retract side of hydraulic cylinder (shaft end).
c. Set switch S4 set to RIGHT and operate hose reel. Check for fluid leakage from open retract
port (shaft end) of hydraulic cylinder.
d. If cylinder leaks from retract port after power is applied, replace cylinder (para. 4-28).
If malfunction cannot be corrected replace valve station (para. 4-17).
4-11
