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Farmall & IHC Tractors Discussion Forum
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H brake band adjustment question

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Bob Frey

09-07-2005 13:51:26




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I seem to have used all the adjustment up on my H brake band adjusters. The bands are new but I can't get the pedal to adjust. It requires pushing on the pedal too far to make the brake work. The action of the brake is good with the only problem being that I have to push too far on the pedal. I suppose the drums must be worn enough that I can't adjust it the way I want. Anybody have a fix for this problem? Thanks in advance, Bob.

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Mike Soldan

09-08-2005 06:19:38




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 Re: H brake band adjustment question in reply to Bob Frey, 09-07-2005 13:51:26  
I have heard about replacement bands being just a tad longer than the I-H originals and causing adjusting problems. Don't forget the adjustments in the brake clevis and the set screw on the bottom of the brake pan ,which has to be set to keep the bottom of the band in position to the pan. I have taken worn pins that hold the bands and built them with brazing , then ground them smooth and they worked fine, you can get new pins as well. I guess I've been lucky, I got all the brake components off of an H that came into Ontario Used Tractor Parts, the bands were like new, so I have extra pans, clevis' bands and pins as well as activating arms and that will keep my two H's going. I cleaned everything up and painted the components, ready to be used...Mike in Exeter Ontario

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P Backus

09-07-2005 21:11:35




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 Re: H brake band adjustment question in reply to Bob Frey, 09-07-2005 13:51:26  
This is a common problem on the band brakes. Like the other guys are saying, it can be the cam plates on the shaft. But it can also be that the aftermarket brake bands are just a little too long. Do you still have your old ones? Lay them next to the new ones and compare the length of the band itself. If you can find a shop that still will reline brakes, they could set them up correctly with the right thickness of lining.
On my own H, I was going to try cutting the band, remove perhaps 3/16" and rewelding it with a wire feed welder. Just don"t all jump on me for "tampering" with my brakes.
Paul

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Bob Frey

09-08-2005 05:19:34




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 Re: H brake band adjustment question in reply to P Backus, 09-07-2005 21:11:35  
Paul, I relined the old bands with the material that I bought from Case/IH. I thought of that too but then realized that the bands themselvs haven't been changed. Thanks, Bob



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P Backus

09-08-2005 07:25:51




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 Re: H brake band adjustment question in reply to Bob Frey, 09-08-2005 05:19:34  
Hmmm....
It just doesn"t seem like those drums would have worn that much, but I suppose it could be. It seems like you"d see a ridge on the edge of the drum then. I wonder if the lining material from CIH is not thick enough. Whatever the cause is, the problem remains. I"m guessing that it would be tough to get new drums, although you could build them up with weld and turn them down on a lathe. That wouldn"t be easy, because when you weld on cast, the surface gets really hard and likes to ruin lathe bits. So, barring other cam problems, my vote would be for thicker lining material, or shortening the band a bit.
Just my thoughts.
Paul

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riverbend

09-07-2005 20:18:36




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 Re: H brake band adjustment question in reply to Bob Frey, 09-07-2005 13:51:26  
I've got the same problem.

The parts book shows a change in the drum at sn 70827, and a change in the brake band at sn 35129. Any idea what the changes were ?

The only reference that I see for the size is that the band is 2 inches wide and 9 inches in diameter. Is there a spec or wear limit for the drum diameter ?



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Dave in CT

09-07-2005 14:15:58




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 Re: H brake band adjustment question in reply to Bob Frey, 09-07-2005 13:51:26  
Had the same problem on one of the brakes on my H, as well. Like you, tried a new band, still unable to get it within any range of operability. Disassembled the unit again and took a close look at the two cam plates the pins that secure the ends of the bands go through. The plates were twisted out of alignment with each other. The brake couldn't possibly have done its job like that. Since then I've heard this is a common problem with the H brakes - sometimes the shaft that the plates are welded to just twists and other times the welds that hold the cams to that shaft break. The first used replacement cam assembly I bought had fine cracks in the welds. When you get it apart, if the cam plates aren't obviously misaligned, clean the cams up good and look for those cracks. I got my replacement from Steel Wheel Ranch but make sure to specify, aligned plates and no cracks in the welds.

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chadd

09-07-2005 15:39:31




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 Re: H brake band adjustment question in reply to Dave in CT, 09-07-2005 14:15:58  
I had the same thing happen to our W6. The right side brake shaft rusted tight to the cover. We couln't remove it. So we got one from the junkyard and it turned out that they welded the metal plates at the wrong angle on the shaft. The brakes had to be floored to even slow that wheel with all of the adjustment used up. Of course we first found out after it was all reassembled. So we cut the old cover through and removed the shaft and then reused it. I should have known it was bad when the cover on the donor tractor came right off. . .

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RustyFarmall

09-07-2005 13:56:17




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 Re: H brake band adjustment question in reply to Bob Frey, 09-07-2005 13:51:26  
There is a fix, just can't remember the details right now. Has something to do with the cam that the bands attach to I think. I encountered the same problem on one of my Hs, started checking out what the solution might be but then parked the tractor because of other problems.



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