TM 5-5420-280-10
0038 00
Pallet Electrical Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
29. RCU WILL NOT UNCOIL WINCH WIRE ROPE (R4-A+H+M)
Step 1. Check that KY1 and KY2 hydraulic control valve solenoid LED
lights are lit when action button 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 2 is depressed.
If light is out, notify field maintenance.
END OF TESTING
30.
RCU WILL NOT LOWER LAUNCH BOOM TO RETRIEVAL POSITION (R4-A+H+M)
Step 1. Check that KY1 and KY18 hydraulic control valve solenoid LED
lights are lit when action button 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 2 is depressed.
If light is out, notify field maintenance.
END OF TESTING
31. RCU WILL NOT RAISE NEAR-SHORE END OF BRIDGE WITH WINCH WIRE ROPE
(R5-H)
Step 1. Check that KY1 and KY21 hydraulic control valve solenoid LED
lights are lit when action button 2 is depressed.
If all 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 2 is depressed.
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
If light is out, notify field maintenance.
END OF TESTING
