TM 5-5420-280-10
0038 00
Pallet Electrical Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
24.
RCU WILL NOT TIGHTEN WINCH WIRE ROPE (L19-M+H)
Step 1. Check that KY1 and KY3 hydraulic control valve solenoid LED
lights are lit when action button 1 is depressed.
If lights are lit on control valve solenoids, notify field maintenance.
Step 2. Check to see if one or more control valve solenoid LED lights are out
when action button 1 is depressed.
If light is out, notify field maintenance.
END OF TESTING
25.
RCU WILL NOT RETRACT BRIDGE CRADLE TO TRAVEL POSITION (L22-H+M)
Step 1. Check that KY1 and KY12 hydraulic control valve solenoid LED
lights are lit when action button 1 is depressed.
If lights are lit on control valve solenoids, notify field maintenance.
Step 2. Check to see if one or more control valve solenoid LED lights are out
when action button 1 is depressed.
If light is out, notify field maintenance.
Step 3. Check for loose winch relays AD2, AD3, and AD4, located in
electrical box.
Push relays AD2, AD3, and AD4 into receptacles. Refer to
END OF TESTING
26. RCU WILL NOT RAISE SUPPORTING CYLINDERS (L21-H+M)
NOTE
KY1 and KY9 control valve solenoids raise left
supporting cylinder and KY1 and KY11 control valve
solenoids raise right supporting cylinder.
Step 1. Check that KY1 and either KY9 or KY11 hydraulic control valve
solenoid LED lights are lit when action button 1 or 2 is depressed.
If both lights are lit on control valve solenoids, notify field
maintenance.
Step 2. Check to see if one or more control valve solenoid LED lights are out
when action button 1 and 2 are depressed.
If light is out, notify field maintenance.
END OF TESTING
