Generator free wheel defective - slipping (Solution)

A defect in the free-running clutch of a modern diesel engine is mainly detected (at idle speed) by excessive oscillation (vibration) of the...
Belt tensioners, sometimes accompanied by noises.


In this case, the freewheel is stuck. (This is fairly well known.)


Caution is advised when the following is true:

--> The belt drive makes a chirping noise in certain areas, even when idling (and it can be heard from inside).

--> A state of calm sets in from 1100 RPM onwards.

--> The belt tensioner exhibits extremely stable behavior at idle speed.

--> A belt drive will NOT (unlike with normal belt noises) suddenly become completely silent.

"as soon as, for example." Spray glass cleaner (without any oil or similar substances) onto the belts.


If these conditions apply:


Carefully pry off the dust cover from the freewheel using a screwdriver.

Are there signs of rust? --> Replace freewheel and one-way clutch.

Generally, check the belt tensioners.


This defect is difficult to locate when the device is installed, as the errors initially occur sporadically, the system still runs, and it does not freeze.

Only clue: rust.

As soon as the freewheel starts slipping permanently, it will be completely destroyed in a very short time, and the pulley will come loose from the generator shaft.