Fuel Pump Idle Speed (005-029)
B3.9 and B5.9 Series Engines
Section 5 - Fuel System - Group 05
The fuel control lever on the Bosch VE fuel injection
If the lever has been removed and reinstalled incor-
rectly, engine speed and power will be affected.
Bosch VE Fuel Injection Pump Adjustment Screws
A - Idle Screw
B - High-Idle Screw
The high-speed adjustment screw on both fuel injection
pumps provides the stop for full speed. The high-speed
adjusting screws are sealed. Adjustment of this screw must
be performed only by an authorized fuel injection pump
service center, and then resealed.
The high-speed adjusting screw can be used to derate
Bosch RSV Governor
Idle speed adjustment for industrial engines requires the
setting of both the low-idle speed screw (1) and the bumper
spring screw (2).
First, loosen the locknut; then, back out the bumper spring
screw until there is no change in engine speed.