I have a scored crank on my 919.165600 – how to dismount it from the motor?

by Rick
(Dansville, NY)

I have a Craftsman 919,165600 6.5hp upright oil-less compressor with a problem. After about 2 years and 60hrs. of operation it failed.

Motor And Crank
Motor And Crank
Damaged Parts
Damaged Parts

Pulling it apart revealed the end bolt on the crank backed off resulting in destroyed big end bearings and spacers, which then resulted in a scored crank. I would like to refurbish or replace the crank but how in heck does it come off the motor shaft?

Any help appreciated.

Rick

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Scored crank – how to dismount from motor – the answer

by Rick
(Dansville, NY)

Motor Shaft
Motor Shaft
Ecentric And Shaft
Ecentric And Shaft
Parts Loosesly Assembled
Parts Loosesly Assembled

See the original post at the start of this thread.

The motor shaft is not tapered. The eccentric, flyweights and the whole mess are held on by the crank pin being wedged into a notch in the motor shaft.

Hopefully these pictures will help the next person.

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The answer
by: Rick

Well, it wasn’t what we thought but acted like it was a press fit worked.

The motor shaft is not tapered but keyed and the crank actually fits into this.

The eccentric locks the parts together, which the piston/bearing stack locks in place via the end shaft bolt. Easier to see in pictures.


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