IP Full Load Adjustment Procedure for the MW and M pumps

Banned

3,628

05-26-2009, 06:53 PM #45

I recently came across this STT document outlining adjustment of the M-Pump for their OM616/7 turbo kits.

STT_M-Pump_gov_mods.pdf
Size: 95.55 KB / Downloads: 5,957

This translation is by tomnik, thank you Tom.
The whole thing is related to tuning on a bench. Rod travel is the rack arm that directly turns the injection pump plungers, visible under the side cover plate.
-------------------
Setting of the injection pump
Max. quantities

Pre-condition: pump rev 1000/min, (Regulierhebel= regulating lever=) external linkage lever at full load position. (Regelstangenhub= (internal) rod travel, the thing that turns the plungers) RH to be set to 15,5 mm by turning adjusting screw (25).
This is bench adjustment, where the ip is driven at 1000 rev/min and the rod ravel is set to a certain value (= fuel quantity)
After that the rod travel is increased to 17,5 mm by adjusting screw (17).
Do the same at 1600/min and 2180/min.
(This is not clear for me, does this mean check the rod travel at 1600 and 2180/min for added 2 mm?)

ADVISE: The values given in the (STT) service information for rod travel and quantities are only approximates and will allow variation in the range of several 1/10 mm.

High idle

External linkage lever at full load, pump rev at 2550/min.
Adjust the rod travel to 10,5 mm by turning the (23) (spring seat).
Control quantity approx. 26 ccm.

Low idle

Turn adjustment screw (50) 2 turns ccw.
Turn (28) ccw until a gap occurs towards the inner low idle stop of the external linkage lever.
After that proceed as follows:
1) Close the gap (eliminate the play) by carefully turning the screw cw.
2) Turn the screw (still 28) cw another 1/6 turn
At 350/min adjust the rod travel to 6,5 mm by turning screw (29). The quantity should be 7,0 ccm.
Then increase the rev to 370/min (what will result in a different rod position) and increase the rod travel by 0,1 – 0,2 mm by turning (50).

Post-check of low idle adjustment

At 820/min and external linkage lever at idle stop the rod travel must not exceed 2,5 mm.

On the right side of the page:

Regelverlauf(= curve rod travel over rev)

Check rod travel at the indicated 4 revs (external linkage lever at full load stop)

Important

Minor variation could be tolerated at 2300 or 2400/min. Any variation at 2500/min has to be corrected by adjusting (23) (pre-tension of the spring).
At 2950/min the rod travel must be in between 0 and 0,3 mm.

This post was last modified: 05-28-2009, 03:54 AM by ForcedInduction.