TM 5-5420-280-10
0037 00
Pallet Hydraulic Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. SUPPORTING CYLINDERS WILL NOT EXTEND OR RETRACT (L4-A+M, L7-A, or R19-H)
Step 1. Check supporting cylinders for damage or missing hardware.
If supporting cylinder(s) is damaged, notify field maintenance.
Step 2. Check for malfunctioning control valve.
If control valve does not function, notify field maintenance.
END OF TESTING
4. BRIDGES WILL NOT EXTEND TO OPERATING WIDTH (L2-H or R21-H)
Step 1. Check that all four fastening rods have been removed.
Remove all fastening rods. Refer to WP 0008 00.
Step 2. Check for damaged telescopic tube.
If telescopic tube is damaged, notify field maintenance.
Step 3. Check for malfunctioning control valve.
If control valve does not function, notify field maintenance.
END OF TESTING
5. WINCH WIRE ROPE WILL NOT OPERATE (L4-A or R18-H)
Check for malfunctioning winch motor or winch assembly.
a. If winch motor is inoperable, notify field maintenance.
b. If winch assembly is inoperable, notify field maintenance.
END OF TESTING
6. BOTTOM BRIDGE HALF WILL NOT MOVE TO REAR (L5-8 AND L8-A or
R15-A AND R17-H)
Step 1. Check that forward pin wheel drive hydraulic motor rotates.
If hydraulic motor will not rotate, notify field maintenance.
Step 2. Check for damaged or missing launch beam pin wheel drive bracket
or drive pins.
If bracket or drive pins are damaged or missing, notify field
maintenance.
END OF TESTING
