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Allis Chalmers Discussion Forum

A.C. rod bearings

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Geo C.

07-28-2003 15:57:39

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Does anyone out there know what the torque for a 1948 wd 45 is the bolts are 7/16 need help!!!!

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07-29-2003 17:36:05

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 Re: A.C. rod bearings in reply to Geo C., 07-28-2003 15:57:39  
What you need to do now is to determine what engine you REALLY have. Look at the side of the block behind the carburator. It will have a number which will tell you, begins with WD or 45 I think. If it is a WD engine it will have a lagre steel plate bolted to the right side of the engine too, this plate goes the length of the block and is about 6" high. If it is a 45 it will not have this plate, just the block casting. You need to know and you need to get the bearings in with the right "crush" or the size will not be right when the cap is torqued down to the torque figures you now know. Do you know if the bearings are already under sized? As in someone else having the crank ground? Do the bearing caps have shims now? You really need to know what you are doing here or you can really mess up. Especially if you are doing a low bucks job, you don't want to mess it up and make it a big bucks job.

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07-28-2003 18:35:24

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 Re: A.C. rod bearings in reply to Geo C., 07-28-2003 15:57:39  
WD45s didn't come along until 1953. There are two torques, one for bolts with self locking or maybe cotter pinned nuts, and one for plain nuts. You need to get yourself a reprint of an AC repair manual for the tractor and engine you are working on. If it is an older one you need to shim the bearing caps to get the right clearances and bearing shell crush. A somewhat involved and time consumeing process to do it right. You can ask how it is done but you need to know if you need to do it or are the bearings the right size from the crank grinder? Or are you replaceing bearings only? We need more information, and as I said, you need a manual.

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Geo C.

07-28-2003 19:05:46

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 Re: Re: A.C. rod bearings in reply to wdTom, 07-28-2003 18:35:24  
The rod nuts are self locking,all I am doing is replacing the rod bearingsI just need the torque for this type thank you and by the way the i.d. plate says it was made in 1948 the marking on the side of the hood beside the radaitor says W.D.45

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07-28-2003 20:14:24

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 Re: Re: Re: A.C. rod bearings in reply to Geo C., 07-28-2003 19:05:46  
Geo C. I do not want to seem argumentive but wdTom is right about the WD45 not being built in 1948. Many WDs have had the WD45 marking or the decals put on them or any number of possibilities as to why it is there but as wdTom said the WD45 was not built in 1948.

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lenard (La.)

07-28-2003 20:09:24

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 Re: Re: Re: A.C. rod bearings in reply to Geo C., 07-28-2003 19:05:46  
Castellated nuts 70 ft.lbs. and luglock nuts 40 ft.lbs.Goodluck!

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Geo C.

07-28-2003 22:36:31

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 Re: Re: Re: Re: A.C. rod bearings in reply to lenard (La.), 07-28-2003 20:09:24  
Thank you lenard for the info. I needed . I don't mean to sound argumentitive to the rest of you but that is what is on my tractor,it is used to mow with a brush hog and it is all my family can afford so I just needed the info without getting into all the fussing about it having the right decals on it thank you again lenard {La.}

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