Help identifying Cummins

Rear gets the thrust bearing.

Little insight for ya…. Loosen all the main bolts first, not loose just simply loosen… gives the crank the ability to drop a couple thousandth, makes it easier to change out the upper bearings….

 

It’s out of my league for now. That’s why I had tagged the experts.

 

I'm not a Cummins guy by any means but roughly 0.060" of end play on a crankshaft seems quite excessive to me. If I were to guess I'd say you would want to be around the 0.008" to 0.012" range. Just enough clearance for lubrication between the thrust bearing and crankshaft surface. I would stick a dial indicator on the crankshaft and confirm the actual amount before jumping to conclusions. Play looks a lot worse to the naked eye than when it is actually measured in my experience.

I'd trust @OLDSKOOLERnWV's advice on this more than mine. Like I said I'm not a Cummins guy, just someone with enough knowledge to be dangerous.

 

Washer is two piece and goes all the way around the crank journal. Earlier ones up to 1968 had one piece washers and cranks had to be completely removed to install those. I believe max tolerance on end play is half the amount you say you have.i’ve seen old timers check them with the thickness of a match book cover and call it good. Lol.

 

Sorry guys I been in the woods all afternoon helping my son in law retrieve his deer.

See if this helps…..

 

Yes the thrust washers are 2 piece. The cut out or notch in the thrust washer that aligns with the pin, that keeps them from spinning with the crank.


Never heard of any clutch adjustment affecting the top thrust washer to fall out…

 

It pulls on the throw out bearing wears the crank which spits the washers out