Table 1. Unit Troubleshooting (Continued)
TEST OR INSPECTION
3. Engine starts but lacks power or will not run
Step 1. Check for clogged air intake.
Remove filter element from air filter.
Check for blockage at air intake.
Inspect filter element for clogging; replace if necessary. (WP 0023 00)
Step 2. Check for clogged fuel filter.
Drain and check fuel filter. Replace if clogged. (WP 0021 00)
Refer to Direct Support Maintenance for repair.
FUEL TRANSFER PUMP
1. Pump will not prime
Check discharge check valve for proper seating.
Check for debris or damage that prevents check valve from seating fully. Clean valve seat and surface.
2. Pump leaks at inlet
Check inlet mounting screws.
Verify that all inlet mounting screws are evenly tightened.
3. Emergency Shutoff Valve leaks.
Inspect to determine area of leak.
If leak is at face of unisex coupling, replace face seal.
Refer valve to Direct Support Maintenance for repair.