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Allis Chalmers Discussion Forum
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Brake repair on WD-45

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Lauren Drees

08-22-2006 08:00:04




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I am trying to replace/repair the brakes on my WD. How do I remove/pull the 'anchor pin' so I can get at the brakes?




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Kevin LA-CA

08-22-2006 21:21:28




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 Re: Brake repair on WD-45 in reply to Lauren Drees, 08-22-2006 08:00:04  
Others have drilled & tapped a hole in the center of the pin. Then used a short length of well pipe, washers and threaded a bolt in the hole. By tightening the bolt, extracted the pin.

I have tackled a pair of stuck pins by welding on a length of 3/4" thread rod. Then used well pipe, washers and a nut. Still required a large wrench and cheater bar. Works well if you are a good welder. If done correctly, the pin can be separated from the thread rod, dressed on a grinder & reused.

kevin

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Evan David

08-22-2006 09:30:25




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 Re: Brake repair on WD-45 in reply to Lauren Drees, 08-22-2006 08:00:04  
Agrimson Tool in MN makes a puller - horribly (mind blowingly really) expensive - but it does work great if the lip is still on the pin. It has worked in most cases I've tried it. In time alone I'd say it will eventually pay for itself.
Here's the site:>Link

HTH.
Evan>Link



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big jt

08-22-2006 21:55:40




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 Re: Brake repair on WD-45 in reply to Evan David, 08-22-2006 09:30:25  
Evan

How does that puller work? Does it horseshoe over the pin or clamp on?

I had notions of building one that would clamp on the next time I did brakes myself.

I would agree that the $175 price tag seems a little salty but would bet it would only take 2 or three tough pins to pay for it at full shop rate.

Thanks for the lead

jt



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Evan David

08-23-2006 10:59:07




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 Re: Brake repair on WD-45 in reply to big jt, 08-22-2006 21:55:40  
jt... sorry i didn't get back sooner. I guess I don't return often enough. The puller works by clamping the head of the pin. There are two pieces with a groove cut into them that sandwich the pin and the slide into a tube. a threaded rod pulls these two pieces up the tube as the base of the tube presses against the housing. It's made well and must be constructed out of pretty hard stuff because it exerts a whole lot of force. I have (although it was an extreme case) pulled the lip right off of the pin with it. As you say... it is "salty" to start with but it doesn't take long before it pays its keep.

Best of luck. Evan

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big jt

08-23-2006 23:59:45




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 Re: Brake repair on WD-45 in reply to Evan David, 08-23-2006 10:59:07  
Would agree about the tough material. Looking at their website it looks like Hardened material is what they deal with primaraly. When you have 5 EDM machines and only two lathes you are dealing with hard stuff!!

THANKS, THANKS, THANKS. I will have to put one of those on my wish list.

jt



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big jt

08-22-2006 08:52:23




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 Re: Brake repair on WD-45 in reply to Lauren Drees, 08-22-2006 08:00:04  
With a lot of luck and frustration. That pin is a bugger.

Use a lot of penetrating oil. A pry bar under the lip can help also. Be careful with this as they can break off.

Should add it has been quite a while since I did one of these. Hoping someone else will have a better idea as I have a couple of tractors that need new brakes.

I know this wasn't the answer you were looking for but that job is just plain a difficult one.

jt

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