Farm Equipment - 426 cranks after rod cap came off

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426 cranks after rod cap came off

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=202577
Printed Date: 22 Sep 2024 at 5:27pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 426 cranks after rod cap came off

Posted By: nickia
Subject: 426 cranks after rod cap came off
Date Posted: 04 Aug 2024 at 10:16am

Thoughts or comments on reusing a crank the the rod cap came off? Dont appear to be any visual damage Thinking about sending one into the machine shop to get looked at. Any one have repurposed a used crank with a rod cap failure or any comments or thoughts? Thanks R-5 and a 7040 red belly are the 2 I have

Replies:

Posted By: Lynn Marshall
Date Posted: 04 Aug 2024 at 11:01am

I've never seen a rod cap come off that wasn't catastrophic. I guess if the machine shop gives its stamp of approval, I'd give it a shot.

Posted By: 8070nc
Date Posted: 04 Aug 2024 at 11:10am

Im with Lynn. Cant imagine a cap coming off and not beating up the crank but i guess anything is possible. If it doesnt have impact marks and the shop says its not cracked yes id run it

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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor

Posted By: nickia
Date Posted: 04 Aug 2024 at 12:02pm

Ok thank you

Posted By: injpumpEd
Date Posted: 05 Aug 2024 at 9:34am

One of the cranks I had welded and stroked to 5.5" for my puller had a spun rod brg on #1. As long as it wasn't cracked it was a great candidate for that project. Should be savable.

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!