TM 10-4520-259-13&P
Table 4-2. Unit Troubleshooting Procedure
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 7.
Check fuel pump for defects.
Replace fuel pump.
Step 8.
Check power to solenoid fuel valve at terminal board.
Notify direct support maintenance if voltage is not present.
Step 9.
Check solenoid fuel valve for defects.
Replace solenoid fuel valve.
3.
FUEL PRESSURE GAGE INDICATES PRESSURE TOO LOW OR TOO HIGH.
Step 1.
Check fuel shutoff valve for defects.
Replace fuel shutoff valve.
Step 2.
Check fuel pump pressure. It should be 100 psi (689 kPa).
Adjust pump pressure.
Step 3.
Check fuel filter for clogs or dirt.
Clean fuel filter.
Step 4.
Check for breaks or restrictions in fuel hoses or loose couplings.
Tighten couplings, remove restrictions or replace hose.
Step 5.
Check fuel pressure gage for defects.
Replace fuel pressure gage.
Step 6.
Check fuel nozzle for clog or defects.
Clean or replace fuel nozzle.
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