TM 5-5420-280-10
0037 00
Pallet Hydraulic Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
13. LAUNCH BOOM WILL NOT MOVE TO PRE-COUPLING POSITION (L12-A or R9-A)
Step 1. Perform malfunction 7 if launch boom will not lower or raise.
Step 2. Perform malfunction 9 if lower support boom cylinders will not
extend or retract.
Step 3. Refer to Electrical System Troubleshooting, WP 0038 00 and perform
RCU Will Not Lower Launch Boom to Pre-Coupling Position.
END OF TESTING
14. LAUNCH BOOM WILL NOT HOLD BRIDGE WHEN EXTENDED OVER GAP (L16-H or
R7-H)
Retrieve bridge and notify field maintenance. Refer to WP 0020 00.
END OF TESTING
15.
WHEEL LIFTING CYLINDERS WILL NOT LOWER OR RAISE
Step 1. Check that retaining pins are removed.
Remove retaining pins. Refer to WP 0007 00.
Step 2. Check for proper hydraulic oil in level in reservoir.
Fill reservoir to proper oil level. Refer to WP 0045 00 and
Step 3. Check position of selector valve.
Place selector valve lever in one of three positions to lower/raise
front, rear, or all wheel lifting cylinders. Refer to WP 0007 00.
Step 4. Check position of control valve.
Place control valve lever in wheels-lowered or wheels-raised
position. Refer to WP 0007 00.
Step 5. Check that hydraulic pump operates and pressure to wheel lifting
cylinders is shown on gauge. Refer to WP 0007 00.
Step 6. Check that wheel lifting cylinders operate after performing steps 1
through 5.
If no pressure is shown on gauge, notify field maintenance.
END OF TESTING
END OF WORK PACKAGE
