3-63. FUEL PUMP TESTING AND CALIBRATION (Contd)
j. Fuel Pump Idle Speed Check
Selector valve (36)
Turn to IDLE position.
Fuel pump assembly (71)
Run at 500 rpm.
Throttle lever (48)
Hold at idle position.
Pressure reading on fuel pressure
gauge (2) should be 32 psi
(220 kPa). If fuel pressure is
incorrect, do step 78. If fuel
pressure is correct, go to step 79.
Governor spring pack
Using fuel pump idle adjusting
Turn fuel pump idle adjusting tool
tool (90), turn idle adjusting
(3375981) (90) clockwise to raise
screw in housing (43) until proper
fuel pressure or counterclockwise to
fuel pressure is obtained.
lower fuel pressure. If adjusting
screw bottoms out, stop the test
stand, remove the housing (43), and
add washers to spring end of screw.
Fuel pump idle adjusting
Depress stop button (24) and
Reinstall plug (89) after adjusting
disengage from governor spring
tool (90) has been removed.
pack housing (43).