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Late 200/7000 brakes

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Hurst View Drop Down
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Joined: 11 Sep 2009
Location: Midway, Ky
Points: 1213
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    Posted: 21 Aug 2011 at 10:32am
One more question on the 7000.  My brakes both act differently, and I am not sure which is correct.  My left brake will nearly lock up the wheel without much force at all on the pedal, almost like an "on-off" switch when you hit a certain point in the pedal travel.  The other brake is much smoother, but it will not lock up the wheel.  I took it apart to clean the balls and ramps, and the balls are still round.  I am not sure if the ramps are worn or not, but I could make the assembly spin out by hand with the springs off of it.  I didn't take off the left side because I was assuming that this was how the brakes were supposed to be (take very little effort to lock up the wheel).  The seals were replaced a couple years ago and I didn't have any signs of leakage, but one side did have some leakage before the seals were done.  The discs on the right assembly that I took apart seemed like they had plenty of life left in them.  The ribs were still clearly defined in the disc.  I know the plates are pretty pricy, and after spending quite a bit on the powershift rebuild and needing to buy fluids to give the tractor it's yearly service, I am a little short on cash to buy new discs, but if it's something that can be fixed without expensive parts, I'll give it a try.
 
Hurst
1979 Allis Chalmers 7000
5800 Hours
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Burgie Quote  Post ReplyReply Direct Link To This Post Posted: 21 Aug 2011 at 10:39am
I`D try roughen the disc up.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Burgie Quote  Post ReplyReply Direct Link To This Post Posted: 21 Aug 2011 at 10:40am
And you are right about pricey!!!!!!!!!
"Burgie"
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DougG View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Posted: 21 Aug 2011 at 3:49pm
My 200 done that , reworked the brakes they were great - a year later one would lock up , had to stand on the other to get any response ; another awful AC design

Edited by DougG - 21 Aug 2011 at 3:50pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranger42 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug 2011 at 2:41pm
Got Kevlar coated brake discs from South Bend Clutch in South Bend, In. years ago for my 210. cured the problem. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hurst Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug 2011 at 4:00pm
That might be something to look into.  I have a clutch shop locally that does brake discs, I just wonder if he would mess with the old linings, as I believe they're asbestos based and are bonded onto the center disc with the splines...
 
Hurst
1979 Allis Chalmers 7000
5800 Hours
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ranger42 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug 2011 at 4:53pm

South Bend Clutch did ask for my "old" cores, but sent me brand new disks. they gave me a few bucks for the old ones I dont remember how much. I do know the new ones were not cheap, but at least it fixed the problem.

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