TM 5-5420-280-10
0037 00
Pallet Hydraulic Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
All hydraulics troubleshooting malfunctions are based
on operator using the RCU only. Refer to WP 0002 00,
Pallet Equipment Features, for location and
description of hydraulic control valves. Launch and
retrieval functional codes are listed in malfunction
titles where applicable
1. HYDRAULIC PUMP WILL NOT OPERATE USING LPU
Step 1. Check that LPU engine is operating. Refer to WP 0015 00.
Start engine and set to operating speed. Refer to WP 0015 00.
Step 2. Check that hydraulic hose quick-disconnects are connected to
auxiliary engine pump supply connectors. Refer to WP 0007 00.
Connect hydraulic hose quick-disconnects to pump supply
connectors. Refer to WP 0007 00.
Step 3. Check for low oil level in hydraulic reservoir.
Fill hydraulic reservoir to proper oil level. Refer to WP 0045 00.
Step 4. Check that bypass valve on LPU pump is in closed position.
Close bypass valve on LPU pump. Refer to WP 0007 00.
Step 5. Operate pallet hydraulic system using CBT back-up power.
Refer to WP 0026 00.
END OF TESTING
2. HYDRAULIC SYSTEM WILL NOT OPERATE USING CBT
Step 1. Check that engine is operating and PTO is engaging on CBT. Refer
to HEMTT Operator's Manual, TM 9-2320-279-10, and WP 0006 00.
Start engine and engage PTO on CBT. Refer to TM 9-2320-279-10.
Step 2. Check for low oil level in CBT hydraulic reservoir. Refer to
TM 9-2320-279-10.
Fill hydraulic reservoir to proper oil level.
Step 3. Check that hydraulic hose quick-disconnects are connected to cBT.
Refer to WP 0007 00.
Connect hydraulic hose quick-disconnects to CBT. Refer to
Step 4. Check gauge for clogged oil pre-filter or clogged oil filter on control
valve manifold. Refer to WP 0007 00.
If either gauge indicator is in red zone, replace pre-filter and oil
filter on control valve manifold. Refer to WP 0007 00.
END OF TESTING
