Perkins A3.152 Thrust washers & crank end play

[Quailman84]

I've got a 35 diesel I'm in the process of installing a new short block. The old engine ate up the crank and block due to a previous rebuild apparently done without one set of thrust washers. So I got a new short block and it has 0.025 or 0.026" of crankshaft end play. It's it ok? I can't seem to find a spec for end play for the A3 in the MF 35 service manual, but the AD3 version specifies a max of 0.015 inch. Are they the same? I can get 0.010 oversize thrust washers but that's still going to leave it at 0.015 to 0.016 unless that's .010 each side. Any help is appreciated.

 

[Ray,IN]

edited; I apologize, this link does not explain the different thicknesses of crankshaft end shims.
Perkins A3.152 workshop manual

 

[Quailman84]

Thank you so much. Looks like the .0075 oversize washers are each .0075 over so that should reduce end play by .015 inch.

 

[Frankmn]

I've got a 35 diesel I'm in the process of installing a new short block. The old engine ate up the crank and block due to a previous rebuild apparently done without one set of thrust washers. So I got a new short block and it has 0.025 or 0.026" of crankshaft end play. It's it ok? I can't seem to find a spec for end play for the A3 in the MF 35 service manual, but the AD3 version specifies a max of 0.015 inch. Are they the same? I can get 0.010 oversize thrust washers but that's still going to leave it at 0.015 to 0.016 unless that's .010 each side. Any help is appreciated.

I just went through something similar with a gas Perkins. Took the crank to machine shop, needed to be ground down .020. After it was there i got a call saying Thrust shoulders were out of spec,. Ok build them up and set it up right. Got it back and crank wouldn't fit in the #4 journal with standard thrust washers. Did some research and discovered the width is smaller for a lip seal block compared to a rope seal. They set the spec for a lip seal. Had to take it back and have the #4 crank journal opened back up. I will say, when i checked the end play on tear down, it seemed excessive. Didn't measure it as i was getting crank reconditioned anyway. They opened the crank journal back up with no additional charge so no harm no foul.
I believe the charge for fixing the thrust area on the crank was 95 bucks originally. I may have been able to put the thicker thrust washers in but now its done right. Just fyi, a new crank was around 350 bucks and getting mine reconditioned was a little more but who knows the quality level of a crank made who knows where for 350 bucks plus shipping.