TM 10-3835-223-13&P
Table 4-2 Unit Troubleshooting - cont.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. DRIVE WHEEL (CYLINDER) DOES NOT MOVE WHEN RIGHT OR LEFT REEL IS SELECTED.
Step 1. Verify that hydraulic hoses from frame unit are secure and properly connected to power pack.
Connect hoses.
Step 2. Inspect hydraulic cylinder for cracked or missing pivot pin.
Replace pivot pin ( para. 4-28).
Step 3. Inspect hydraulic cylinder for missing cylinder shaft nut.
Replace nut (para. 4-28).
Step 4. Inspect hydraulic motor and drive wheel components for damage.
Replace defective hydraulic motor and drive wheel components ( para 4-27).
Step 5. 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 6. 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).
If malfunction cannot be corrected, replace valve station (para. 4-17).
5. DRIVE WHEEL (CYLINDER) MOVED IN ONE DIRECTION, BUT WILL NOT RETURN.
Step 1. Verify that hydraulic hoses from frame unit are secure and properly connected to power pack.
Connect hoses.
4-10
