brakes on 806

Mr Cat · Sep 27, 2013

I rebuilt both the brakes and control cylinder on my 806 using new springs, o-rings, etc. The pedals are adjusted as per manual. Brakes work very well and pedals have a good response. But I still have the original problem which was overheating of the brake housings. Both sides have a slight drag which tends to heat up the housings if driven on the road to another field. If I crack open the bleeders, there is always a very slight flow of fluid that seems to be enough to put a slight drag on the discs. Is this normal for an 806?

pete 23 · Sep 27, 2013

I don't think you would be building enough pressure to compress the return spring unless you have maladjusted the brake pedals. The book says (if I remember right) half or quarter turn of tension. First thing I would do is go with a free pin, no tension and see if that help. If I was working on it I would jack it up and with engine NOT running, the wheel should turn free, no drag on those dry brakes. Then start it up and they should feel same way. A wet brake like 86 series will have a drag. I have had to do a little altering of the self adjusters on those old 806's due to wear. I can't remember just which part I ground off to get clearance but it works. You could also try getting a feeler gauge in between the disks through those leak off slots in the bottom. Are you sure the self adjusters are in good condition and working properly. They are a real sore spot on those models.

the tractor vet · Sep 27, 2013

My guess is that you have and adjuster problem or you really do not have it put together correctly . With the engine running you WILL have a slight amount of fluid seepage when you open the bleeder and this will not cause a problem . In all my years working on Farmalls i have never had to but once get into a brake valve and that was because of the headed pin froze up and the man broke the end off the valve . IF one of the adjuster is not working correctly and the brake disc's get cockeyed and the brake piston is setting cockeyed then you will have brake drag and heating . Did you replace the little adjuster clippies with new ones and did you reset them and see if they will only screw out and not screw back in ?? , best check that as this is where i think your problem lies .

brakes on 806

Mr Cat

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pete 23

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the tractor vet

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