TM 9-2320-260-34-1
5-25. FUEL PUMP CALIBRATION (Contd)
g. Testing and Adjusting Idle Speed
1.
Place selector valve (7) to idle position. Set fuel pump (4) speed to 500 rpm. Place throttle lever (3)
to idle position. Fuel pressure gage (2) should read 26 psi (179.27 kPa).
NOTE
If unable to obtain proper fuel pressure, and screw bottoms,
stop the test stand, remove spring pack (para. 5-18) and add
shims to spring end of adjusting screw. Retest cutoff rpm and
throttle leakage.
Perform steps 2 and 3 if fuel pressure is not to limit.
2.
Remove governor spring pack housing pipe plug (5) from housing (6).
3.
Using spring pack adjusting tool adjust idle screw (8) until 26 psi (179.27 kPa) is obtained.
NOTE
Each time governor spring pack housing or adjusting tool is
removed, run pump until purged of air.
After proper adjustment is made, stop the test stand (1) and remove spring pack adjusting tool.
4.
Install governor spring pack housing pipe plug (5) into housing (6).
5.
Purge air from fuel pump (4).
6.
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