TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Fuel Pump Idle Speed (005-029)
Section 5 - Fuel System - Group 05
Page 5-59
13 mm, Screwdriver and Tachometer
Loosen the locknut, and adjust the idle speed screw to 40
to 50 rpm less than the desired speed. Turn the idle speed
screw counterclockwise to decrease rpm and clockwise
to increase rpm.
Tighten the locknut.
Torque Value: 8 Nm
[71 in-lb]
19 mm, Screwdriver and Tachometer
Turn the bumper spring screw clockwise until the desired
idle speed is obtained.
Tighten the locknut.
Torque Value: 8 Nm
[71 in-lb]
Bosch RQV and RQV-K Governor
8 and 10 mm, Screwdriver and Tachometer
Idle speed adjustment on automotive fuel injection pumps
requires setting of the stop screw.
Loosen the locknut, and turn the idle speed screw coun-
terclockwise to increase the rpm and clockwise to de-
crease the rpm speed.
Tighten the locknut.
Torque Value: 8 Nm
[71 in-lb]
CAUTION
Do not reduce idle speed from factory setting on the
Stanadyne DB4 fuel injection pump. Internal damage
can result.
Distributor Pumps
10 mm
Loosen the adjusting screw locknut, and adjust the idle as
required.
L-919