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Allis Chalmers Discussion Forum
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Loosing confidence with machine shop, please advis

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orange-1

05-30-2007 15:04:31




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Okay, here's the deal...
BACK GROUND: I'm in the process of a total wd45 engine rebuild. Approximately 2-months ago I dropped the crank off at a local machine shop to be ground & polished. Subsequently, I dropped off the block to be cleaned and have new cam bearing installed, the head for new valve guides and the rods to be sized (spun a bearing). CURENTLY:
The crank has been ground to .030". One of the rod journels has a place that cannot be polished out (machine shop says it will not cause a problem?
The shop lost one of the rods...He says he found one that will work with no problem (its certainly not a rod from an AC??)? Oh yea, the original story was he lost the rod, now, the story is the rod would not size and he found a replacement.
QUESTIONs:
1. Will the spot on the crank cause me problems?
2. Should I be concerned with the replacement rod?
I feel I have way to much invested time and parts to be misguided. I optioned for the complete rebuild to avoid engine problems for many years. Please advise. How would you guys with experience proceed?
Thanks,

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John (MO)

05-31-2007 07:38:51




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 Re: Loosing confidence with machine shop, please a in reply to orange-1, 05-30-2007 15:04:31  
As the saying goes: STUFF does happen. An honest shop should not have a problem with paying for a CORRECT replacement rod. As someone else mentioned, at one time you could get a bearing that would allow a deeper polish on the crank. If you still can, I`d go that route. I would really want to see the spot in person before I said it`s ok to leave as it is. And, get another opinion or two. Maybe you could get a good photo and show us if nothing else. When you get the correct rod, I`d have them weighed and balanced also.

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DARDAN

05-30-2007 21:41:52




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 Re: Loosing confidence with machine shop, please a in reply to orange-1, 05-30-2007 15:04:31  
orange1, check the forging numbers on the set of con rods. All 4 should be the same #. Good chance if a bearing spun badly enough to not clean at ,030 U/S, the rod WAS junk. I would try to get someone knowlegable (from outside this shop)to give a second opinion on the crank journal. Seeing it is the only way to understand how good it is not. And it will make a difference whether this will be a hobby tractor with parade duty, or a pulling, or full bore work tractor. I've seen a WD with a hand filed crank(desperation) survive 25 years of farm duty. There used to be, thru NAPA, a semifit bearing, that could be fitted down to .060 U/S to save a crank. Right at this moment, I don't know if they still are. Kinda shakes the confidence eh.

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730virgil

05-30-2007 20:46:51




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 Re: Loosing confidence with machine shop, please a in reply to orange-1, 05-30-2007 15:04:31  
take your stuff to someone else if he is that careless to lose YOUR parts how can you trust him to do the job right?



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Texas Denny

05-30-2007 19:51:14




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 Re: Loosing confidence with machine shop, please a in reply to orange-1, 05-30-2007 15:04:31  
I agree with Steve and George. Get an Allis rod that matches the other three. A look alike rod is not nearly good enough.



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steve(ill)

05-30-2007 19:46:57




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 Re: Loosing confidence with machine shop, please a in reply to orange-1, 05-30-2007 15:04:31  
i agree a small spot on the crank is not a big problem. a different rod is not good. the weight is important to keep balance. i would also suggest getting a replacement ALLIS rod.



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George Andreasen

05-30-2007 19:42:02




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 Re: Loosing confidence with machine shop, please a in reply to orange-1, 05-30-2007 15:04:31  
As far as the unpolished spot on the crank..if it's not too big it shouldn't cause a problem. The rod is a different matter. Confront him with the fact that he gave you two conflicting stories and make an offer....you locate a correct rod and he pays for it along with shipping. It's the only honorable thing to do. He should NOT have the say-so as to how YOUR engine is built. It's YOURS, not his.

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