TM 5-5420-278-24&P
0012 00
0012 00-1
UNIT TROUBLESHOOTING
IMPROVED RIBBON BRIDGE (IRB)
RAMP BAY M16
NSN 5420-01-470-5825 P/N 12478918;
INTERIOR BAY M17
NSN 5420-01-470-5824 P/N 12478919.
PUMP SYSTEM TROUBLESHOOTING
NOTE
Refer to the general instructions in Introduction to
Troubleshooting, WP 0007 00, prior to performing pump system
troubleshooting.
1.
PUMP SYSTEM WILL NOT RAISE BAY (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 0080 00).
Connect quick-disconnect couplings.
Step 3. Check to see that both pump control levers are set to the UP position.
Set pump control valve to UP position (TM 5-5420-278-10) and raise bay.
Step 4. Check pump reservoir for low fluid level.
a. If empty or low, fill reservoir to correct level (TM 5-5420-278-10).
b. Bleed pump system of air (WP 0038 00).
Step 5. Check pump tubes and hoses for leaks.
a. If leak is found, repair or replace damaged tube or hose (WP 0037 00).
Bleed pump system (WP 0038 00).
b. If no leaks can be found, check hoses for correct installation (WP 0037 00).
Step 6. Check cylinder for external leak.
Repair cylinder if leaking; notify support maintenance.
Step 7. Check pump for external leaks.
Repair pump if leaking; notify support maintenance.
Step 8. Check pump control valves for leaks.
Replace pump control valves if leaking; notify support maintenance.
Step 9. Check cylinder valve block for leaks.
Replace cylinder valve if leaking; notify support maintenance.
END OF TESTING
Unit Pump System Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
