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John Deere Tractors Discussion Forum
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john deere b main bearings wear question

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ricflair

11-20-2023 17:57:08




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My 44 B has full shim packs, the orignal owner said they never
had the engine apart. The babbit is worn a little thin in a few places and the bronze is showing.
Is it ok to remove shims to adjust and keep using them?

Or are they worn out if bronze is showing?

There are a lot of shims, so I would think you should be

good as long as there are still shims available or am I wrong?

Thanks

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ricflair

11-21-2023 15:47:46




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 Re: john deere b main bearings wear question in reply to ricflair, 11-20-2023 17:57:08  
Thanks for the advice, I do have plastigage.

I just read thru the original deere repair book and it just says

make sure there's no cracks or chipping they don't say anything

about wear.

I have noticed that original repair books no matter the brand

are kind of vague in some areas.



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620 John

11-21-2023 06:55:53




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 Re: john deere b main bearings wear question in reply to ricflair, 11-20-2023 17:57:08  
Stuff like this depends on what the tractor is being used for. If tractor pulling then I'd say look for better bearings. If parades, shows, and occasional work then you'll be fine. When shimming those pay attention to when they get tight. For example, if you remove two shims and it gets tight after torquing the bearing bolts half way then you add only one shim you might only have .002" clearance. In that case you will have to add two shims back in then you'll end up with probably .005-.006". As mentioned, not a bad idea to plastigage to verify the clearance.

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rustred

11-20-2023 19:26:43




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 Re: john deere b main bearings wear question in reply to ricflair, 11-20-2023 17:57:08  
you need to plastiguage the clearance first. is this an overhaul ?



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