I am new owner of old U417 (U900) that need some love to be again in perfect condition.
Here is the problem:
The gas throttle pedal was jammed (seized) and it moved very hard.
After I was clean and unblocked it, I have a problem that whole throttle linkage are moving very easy thus I can’t control precisely the engine revolution by my feet. The result is that truck is jumping (hopping).
Could it be because I have some free plays (free movement) between the links and link’s joints btw pedal and injection pump? Or....
Engine is OM352 (353.902)
Thank you very much for support and ideas...