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Allis Chalmers Discussion Forum
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Brakes

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Cecil Aman

11-29-2007 14:58:40




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1949 AC B..... .....

Here is a picture of my project for this winter. I have it completely torn down with a few exceptions. Three of the four bolts twisted off where the brake band goes. I tackled one this afternoon but did not completely get it out. I did drill it with three different drills and surprisingly the hole is straight, last drill bit was 3/8. Tried to back it out with a four cornered easy out, but would not come. Any suggestions????? ????? ??

Also how to clean out the brake drum area. It is half full of everything. The covers have been long gone, there is grease, dirt, brake linnings, leaves in that cavity. Any suggestions????? ????? ?

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fence row

12-01-2007 20:14:21




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 Re: Brakes in reply to Cecil Aman, 11-29-2007 14:58:40  
yes heating a broken bolt after driling a hole and using wax sometimes works good, and most of the time if you can put a nut on or over it and weld the nut to the broken bolt it will come out easy after it cools a little.



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DS Mi

12-01-2007 16:46:11




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 Re: Brakes in reply to Cecil Aman, 11-29-2007 14:58:40  
Get tourself a set of reverse drill bits and throw the easyouts out. You will be amazed.



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steve(ill)

11-30-2007 18:57:42




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 Re: Brakes in reply to Cecil Aman, 11-29-2007 14:58:40  
im not sure what 3 bolts you broke on the brake?? the cavity hole is on top looking down at the drum. there are two 5/8 diameter pins holding the shoes into the housing. head and pound the pins out- use penetrant.--- to clean out the holel, use a screw driver in the bottom to loosen thinkgs up, blow air thru the top with a compressor and a long skinny copper tube. pieces will fy everywhere. put your finger in the bottom and fill the top with soapy water and let it set 30 seconds, drain and blow out with air--- over and over- takes about an hour each side to clean.

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JMS/.MN

11-29-2007 16:20:21




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 Re: Brakes in reply to Cecil Aman, 11-29-2007 14:58:40  
When dealing with equipment this old- oxy/acetylene torch is the best answer. Lacking that- whang every bolt a few times with a BFH- sometimes loosens the bolts. Even with a torch- as it cools, melt some candlewax onto the bolt....seeps between the threads and loosens them. In cast- heat the cast, not the bolt. Bolt gets red hot too soon, latent heat in the cast will loosen the bolt better. Beats dealing with easy-outs, etc.

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