TM 5-5420-280-23&P
0012 00
0012 00-2
Unit Pump System Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
PUMP SYSTEM WILL NOT HOLD BAY IN RAISED POSITION (RAMP BAY ONLY)
Step 1. Check hose connections for proper installation.
Observe color coding on hose connections.
Step 2. Check for disconnected quick-disconnect couplings (WP 0078 00).
Connect quick-disconnect couplings.
Step 3. Check position of both control valve levers.
Ensure both levers have been moved to the TRANSPORT/CROSSING position and are fully
engaged in slot on selector (TM 5-5420-278-10).
Step 4. Check pump tubes and hoses for leaks.
If leak is found, repair or replace damaged tube or hose (WP 0037 00).
Bleed pump system (WP 0038 00).
Step 5. Check pump control valves for leaks.
Replace pump control valves if leaking; notify general support maintenance.
Step 6. Check cylinder valve block for leaks.
Replace cylinder block if leaking; notify general support maintenance.
Step 7. Check cylinder for internal leak.
Repair cylinder if leaking; notify general support maintenance.
END OF TESTING
END OF WORK PACKAGE
