112
Model Code Page
22. Fuel system
1. 9. 1992
6000--8750 223 4
7. Fit the delivery valve into the fuel injection pump. Place the
spring in place and tighten the holder.
Note! Renew the sealing ring and o---ring.
8. Tighten the holder as follows:
--- Tighten first to 30 Nm.
--- Open the holder about 1/2 a turn and tighten to 40 Nm.
--- Open the holder about 1/2 a turn and tighten to 45 Nm.
F. Adjusting low idling speed
If the idling speed of the engine deviates from the value given
in the specifications or if the engine revs vary at the idling
speed, adjust the idling speed as follows:
1
2
1. Unscrew the idling speed adjusting nut cap (1) and the cap
(2) on the idling speed additional spring adjusting screw.
2. Ensure that the throttle lever is in the idling position and that
the engine is at normal operating temperature.
3. Start the engine and loosen the adjusting screw of the addi-
tional spring so that it does not affect the idling speed.
4.Adjusttheidlingspeedusingtheadjustingscrewtoabout
20 RPM below rated speed and lock the adjusting screw (10
mm).
5. Run the engine a few times and ensure that the idling speed
remainsasset.
6. Tighten the adjusting screw of the additional spring until the
idling speed rises to the rated value. Lock the adjusting screw
(17 mm) in this position.
7. Fix the safety caps of the adjusting screws.
Note! Other adjustments (output and max. speed) of the in-
jection pump can only be performed by a specially trained
person who has the necessary special toolsand gaugesavail-
able.
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