Farm Equipment - Stupid Question???

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Stupid Question???

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=9442
Printed Date: 20 Jan 2025 at 10:20pm
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Topic: Stupid Question???

Posted By: Ryan Renko
Subject: Stupid Question???
Date Posted: 13 Mar 2010 at 9:12pm

Don't ask me how or why,,,,, but is it possible to straighten a twisted connecting rod? It in a tractor that will only be used as a toy, not a everyday tractor. Thanks, Ryan

Replies:

Posted By: Ryan Renko
Date Posted: 13 Mar 2010 at 9:14pm

BTW, its in a MM ZTU!!!! It may have happened removing a stuck piston from a "jug"!!!!

Posted By: LouSWPA
Date Posted: 13 Mar 2010 at 9:17pm

I know that machine shops can/do straighten rods, but I suppose there is a limit to what they can do. Best to take it to a good shop and have them look at it

Posted By: Jeff Z. NY
Date Posted: 13 Mar 2010 at 10:39pm

Yes, They can be straightened.

Find a good engine machine shop.

Posted By: bigfish_Oh
Date Posted: 13 Mar 2010 at 11:49pm

That can't be a stupid question, a stupid question is the one you don't ask.

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1941 WC sat for 29 years,started & dynoed 27 h.p.
1957 WD45 Grandpa bought new,factory p.s.,added wfe
1951 WD, factory p.s.
1960 D14 HnMk IV BkHoe 4 sale
2014 HD Tri Glide
2009 GMC CC SLT Dually

Posted By: Steve in NJ
Date Posted: 14 Mar 2010 at 8:44am

Depending on how bent it is, some can be straightened. I would think that you should be able to find a used replacement though if worst came to worst....
Steve@B&B

Posted By: injpumpEd
Date Posted: 14 Mar 2010 at 5:24pm

call Rob Ohda at 815-379-2377 for your MM parts needs. He bought out Wilbert Kerchner's MM parts business. He is a very good guy to deal with, and is also an Agco Heritage parts dealer in north central Il. I buy all my parts thru him, yes supporting Agco, but most important, supporting his local business! Ed.

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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!

Posted By: Ryan Renko
Date Posted: 14 Mar 2010 at 7:48pm

Thanks for all the help!!! I'm a AC man, and just helping my good friend with this ZTU. Its interesting to see how other companies made their product. MM brakes are a dream compared to AC!! The motor, it was a whole new and strange beast!!! Ryan

Posted By: Gerald J.
Date Posted: 14 Mar 2010 at 8:11pm

I'm not much of a fan of reworked rods. A hairline crack as the result of bending and straigthening and one day you have a new vent hole in the block.

I saw a rod "refurbished" where the insert had been worn through and the crank left a mark in the rod. It came back from the shop with a nice set of honing marks. But the engine still knocked. I helped take it apart the next time and found the "round" hole for the insert was still ten thousandths out of round. Plenty for a rod knock.

Checking for straight is not trivial, not something you do with a yardstick and a plumb bob. You need STRAIGHT steel shafts to fit in both ends and then a surface place and a dial gauge or better to check those shafts for parallel in a couple directions. Unless the rod can't be had without bends it would not be cost effective to check properly.

Gerald J.