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Allis Chalmers Discussion Forum
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Model B brakes

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WEDGE

09-28-2005 16:58:52




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Can anyone tell me how to adjust the brakes on a 1939 model B. Sorry to be a bother but I have not found a manual yet, I would also appreicate the information on the best place to aquire a owners manual and service manual if anyone has a good tip. thanks
wedge




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wedge

09-29-2005 20:09:50




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 Re: Model B brakes in reply to WEDGE, 09-28-2005 16:58:52  
Thanks for all of the follow up, My 39 had one screw and one bolt tighten up both and have good brakes now Thanks again
wedge



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jeffalex2

09-29-2005 03:25:56




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 Re: Model B brakes in reply to WEDGE, 09-28-2005 16:58:52  
I got my shop manual from Tractor Supply, and got the Service and Operators manuals from Binder Books online. Get a flashlight and look down inside the brake housing...take off the shield on top with a 3/4" wrench if you can. If the linings on the bands look really old or glazed, be careful about tightening them down. Mine had a lot of wear left to them, but, they were so brittle that when I tightened them, the linings broke...then I replaced them. It stops great now. The bummer is, I think the manual says that on the older B's, it may be necessary to "chisel out a slot" in the housing in order to get old bands out and new bands in.

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Texas Denny

09-29-2005 07:20:57




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 Re: Model B brakes in reply to jeffalex2, 09-29-2005 03:25:56  
I wonder if you are refering to the fact that each pin that holds the top of the lining needs to be driven out. However, the casting has no hole toward the center of the tractor in some locations. So you need to drill one throught the casting to the pin hole so the pin can be driven out.

I didn't have to modify anything else to do the brakes on my C. I think the casting and brakes are the same. It was quite difficult getting them out. I had to remove the right axel from the tractor to get that one out. Had to use a pulling wire to get them back in.

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jeffalex2

09-29-2005 18:02:06




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 Re: Model B brakes in reply to Texas Denny, 09-29-2005 07:20:57  
In the B/C service manual, it says that if you are replacing a 'bolt end' band assy with a 'screw end' assy with serial numbers below B64501 or C20723, the final drive housing must be chipped out to allow the band to pass around the drum.



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chalmersbob

09-28-2005 19:30:50




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 Re: Model B brakes in reply to WEDGE, 09-28-2005 16:58:52  
if your 39 has the original brakes in it you will find a 5/16 nut to adjust the brakes, in the same spot as the slotted screw is on the newer models. be careful as the spring hooks over the nut. BOB



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chalmersbob

09-28-2005 19:32:21




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 Re: Model B brakes in reply to chalmersbob, 09-28-2005 19:30:50  
should have said "5/16 bolt with nut on it" BOB



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