Super M Brakes with pics

cazzhrdwd · Aug 6, 2009

This tractor has very little stopping power with these brakes. What do you guys think is the problem with these, are they just dirty, need adjustment. Do they look worn.

Thanks
Cazz

NEKS · Aug 6, 2009

There is steel balls in between the plates that twist when you apply brakes. The balls have to be clean and the channels that they run in have to be smooth and clean and the spline they all run on. They have some life left in them.

CNKS · Aug 6, 2009

Replace the balls, springs, and disks, sand the rust off the machined surfaces and they are good to go.

GordoSD · Aug 7, 2009

I've done a number of these. Remove the inner disc and clean up that inner surface with a 40 grit flap wheel on your 4 1/2 angle grinder. Then do the surface on the drum.Scuff up both sides of both discs with round wood rasp. Clean up the ball grooves. Make sure the adjusting bolt is not "bottoming out" on the actuator paltes. Grind some off if you have to.
Wire brushe the axles and spray just a little chain lub on them.Also spray the teeth on the discs.
A tad of 30 wt oil where the balls travel. I also have the drums planed .075 just to get a little more pressure.
Nice pictures and great way to ask a question.

Gordo

cazzhrdwd · Aug 7, 2009

Thanks for the info guys. One problem I see though, there were no balls in there when I took this apart. I'll check the manuel and try to see where they go

Thanks
Cazz

cazzhrdwd · Aug 7, 2009

Never mind I found them. Let me ask another dumb question. These brakes have a lot of rust, many of you guys have commented on this issue in past replies. Why could'nt you paint the inside of the housing and some other parts inside that do not touch any other surface or that weares on another part.

Thanks
Cazz

Greg-N-CA · Aug 8, 2009

We recently repaired the brakes on our SMD. I followed the advice others have given, but I took it one step further. I machined the face of the inner (bering retainer) brake surface on a flat belt surfacing machine. I chucked the outer housing on a lathe and cut a new face inside. Once I had new surfaces for the discs to contact, I cut 0.010" to 0.12" cut off the the outer housing to compensate for the material I removed from the brake surfaces.

I had to replace one set of actuators, but the other set I surfaced on the belt sander. This is a good opportunity to replace your oil seals too. Good luck, Greg

john d · Aug 8, 2009

The rust isn't from lack of of paint on the inside, it's from moisture getting in there. If the rubber boot on the actuator rod is cracked or missing, replace it. When you have the brake housing re-assembled, put a heavy coat of paint on the OUTSIDE to discourage moisture from entering. Parking these tractors outside in the rain is a common shortcut to no brakes.

Super M Brakes with pics

cazzhrdwd

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NEKS

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CNKS

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GordoSD

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cazzhrdwd

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cazzhrdwd

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Greg-N-CA

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john d

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