Table 99
Troubleshooting Test Steps
Values Results
12. Transfer Pump Inlet Regulator (TPIR) Flow Test
Note: When performing the following fuel system tests, the Elec-
tric Fuel Lift Pump (EFLP) will only operate for 2 minutes unless
the engine is running. If necessary, cycle the keyswitch to reacti-
vate the pump.
Refer to Illustration 66 .
A. Disconnect the TPIR return line from the drain port on the
TPIR. Install a suitable blanking cap on the open port in the TPIR
return line.
B. Connect a temporary drain line to the drain port on the TPIR.
C. Place the end of the temporary drain line into a suitable cali-
brated container.
D. With the isolator switch in the ON position but the engine not
running, use a suitable multimeter to measure the input voltage to
the EFLP. Record the reading.
E. With the isolator switch in the ON position but the engine not
running, measure the fuel flow from the temporary drain line.
F. Refer to Illustration 67 or 68 for the minimum acceptable flow
rate.
G. Remove the temporary drain line from the drain port on the
TPIR. Connect the TPIR return line to the TPIR.
TPIR flow rate Result: The fuel flow is greater than the minimum limit.
Proceed to Test Step 14.
Result: The fuel flow is less than the minimum limit.
Proceed to Test Step 13.
13. Transfer Pump Inlet Regulator (TPIR) Return Test
A. Make sure that the TPIR return line is not blocked or kinked.
B. Check that the Electric Fuel Lift Pump (EFLP) is operating
correctly.
TPIR return line Result: The TPIR return line is blocked or kinked.
Repair: Clear the TPIR return line or replace the line
Confirm that the fault is eliminated.
Result: The EFLP is not operating correctly.
Repair: Refer to Troubleshooting, “Fuel Transfer Pump
- Test”.
Result: The TPIR return line and the EFLP are OK.
Proceed to Test Step 14.
200 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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