(Table 66, contd)
Troubleshooting Test Steps
Values Results
Repair: Drain the fuel tank and the fuel system.
Replace the primary fuel filter and the secondary fuel filters.
Refer to the Operation and Maintenance Manual for further
information.
Fill and prime the fuel system with fuel of the correct specifi-
cation. Refer to Systems Operation, Testing, and Adjusting,
“Fuel System - Prime”.
Result: The low-pressure fuel system is OK.
Proceed to Test Step 6.
Illustration 45 g03700009
Transfer Pump Inlet Regulator (TPIR) components
(1) Transfer Pump Inlet Regulator (TPIR)
(2) TPIR return port
Illustration 46 g02485896
Minimum TPIR flow rate in a 12 VDC system
Illustration 47 g02485897
Minimum TPIR flow rate in a 24 VDC system
UENR4469-36 135
Symptom Troubleshooting
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