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Pallet Electrical Troubleshooting.
RCU WILL NOT RETRACT WINCH WIRE ROPE (L3-A)

TM-5-5420-280-10 Rapidly Emplaced Bridge (REB) NSN: 5420-01-481-3959 Manual
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TM 5-5420-280-10
0038 00
Pallet Electrical Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Refer to launch and retrieval procedures in
WP 0016 00 and WP 0020 00 for operation of RCU.
Ensure hydraulic system has pressure before
performing electrical troubleshooting. Any hydraulic
operation will prove system has pressure.
3. RCU WILL NOT OPERATE HYDRAULIC SYSTEM USING CBT OR LPU BATTERIES
Step 1. Check that hydraulic system has pressure.
If no pressure is evident, notify field maintenance to check hydraulic
pressure.
NOTE
KY1 hydraulic control valve solenoid must operate
with all other control valve solenoids to perform an
operation.
Step 2. Check that KY1 hydraulic control valve solenoid LED light is lit
when action button 1 is depressed.
a. If light is lit and system will not operate, notify field
maintenance.
b. If light is out, notify field maintenance.
END OF TESTING
NOTE
Malfunction 4 through 26 are performed in bridge
launch sequence.
4. RCU WILL NOT EXTEND BRIDGE TO OPERATING WIDTH (L2-H)
Step 1. Check that all four fastening rods have been removed.
Remove fastening rods. Refer to WP 0008 00.
Step 2. Check that KY1 and KY13 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 3. Check to see if only one control valve solenoid LED light is lit.
If only one light is lit, notify field maintenance.
END OF TESTING
0038 00-5






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