Fuel Lift Pump (005-045)
B3.9 and B5.9 Series Engines
Section 5 - Fuel System - Group 05
Test 1: Output Pressure Test (Piston Style)
Operate the engine, and measure the output pressure of
the fuel transfer pump using an in-line pressure gauge at
the inlet to the injection pump.
Minimum pressure at rated speed is 172 kPa [25 psi].
Test 2: Flow Volume Test (Piston Style)
To prevent the engine from starting, disconnect the fuel
shutdown wiring. Residual fuel in the injection pump
can cause the engine to start.
Do not crank the starter for more than 30 seconds at a
time. Doing so can result in starter damage. Also, high
voltage during cranking can damage the shutdown
Disconnect the fuel shutdown solenoid wire.
Measure the engine cranking speed with a handheld ta-
chometer (Cummins Part No. 3377462).
Leave the shutdown solenoid disconnected for the fol-
Disconnect the output pressure line from the transfer pump,
and run it into a container.
Crank the engine for 30 seconds, and measure the fuel
transfer pump flow volume.
Refer to following chart(s).