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Farmall 686 brakes

G

glarsonmidusa

New User
Hello friends,
My question is about brakes on a Farmall 686. I purchased this tractor recently and today I tried to adjust the brakes.
Right side OK. Remove cover plate. Remove one shim. Re-assemble. Adjust pedal. Easy!
Left side the cover plate is frozen to the reaction pin!! Consequently I can't get to the insides.
I see two options.
Option one would be to use an angle grinder and destroy/remove the cover plate. Then remove shims to affect the adjustment. Polish the reaction pin so new cover plate will fit. Then replace the cover plate with a salvage one.
Option two (probably easier) is to remove the complete brake unit and replace it with a salvage unit. Looks like the four cover plate bolts hold the entire unit in place. But I don't know if I can remove the complete unit if I can't get to the insides.
Any help?
 
With all the cover bolts out, try moving the cover plate up-down around the anchor pin after soaking the pin with your favorite panther pee. It should come off so you can get another shim out. Had the same fun on my cousin's 666 gas last summer..
 
Hi Dieseltech, Yes, I did exactly that. But the other end of the reaction pin is a slip fit retained by a snap ring. So, it rotates along with the plate. I got a small crowbar hooked under the edge of the cover plate and pried while I tapped with a hammer. But no progress. I didn't mention that the cover plate has no paint. Like it may have been heated by someone previous. And I do not know if they were successful or not. I am going to assume NOT.
 
Yes, I thought of drilling the pin out. It would probably work. But "Is it hardened?" Guess I can find out by risking a drill bit.
 
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