TM 5-5420-280-10
0038 00
Pallet Electrical Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11.
RCU WILL NOT MOVE LOWER BRIDGE HALF TO COUPLING POSITION (L10-A)
Step 1. Check that KY1 and KY6 hydraulic control valve solenoid LED
lights are lit when action button 1 is depressed.
a. If all lights are lit on control valve solenoids, check limit switch
KA4 to see if damaged or out of adjustment. If limit switch KA4 is
damaged or out of adjustment, notify field maintenance.
b. If limit switch KA4 is operating and control valve solenoid LED
lights are lit, 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
12.
RCU WILL NOT LOWER WINCH WIRE ROPE (L11-H)
Step 1. Check that KY1 and KY21 hydraulic control valve solenoid LED
lights are lit when action button 1 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 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
13.
RCU WILL NOT LOWER LAUNCH BOOM TO PRE-COUPLING POSITION (L12-A)
Step 1. Check that KY1 and KY16 hydraulic control valve solenoid LED
lights are lit when action button 1 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 is depressed.
If light is out, notify field maintenance.
END OF TESTING
