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Farmall & IHC Tractors Discussion Forum
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Super M brakes

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53DC

07-26-2006 12:20:50




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Last night I was backing the Super M off the trailer and touched the brakes. Both of them locked up tight and started sliding. Slid off the side of the ramps (Yea that was alot of fun LOL). Thankfully I was almost off and it only dropped about a foot. Got the front down ok and cleaned out my pants. After I hit the brake pedals again they released and drove fine. Every time now that I touch the brakes there is no gradual braking, it is just grab and lock up. Any ideas on what I should look for when I take the covers off. Thanks for any help.

P.S. I don't recommend coming off a trailer that way.

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Ernest

07-27-2006 04:23:34




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 Re: Super M brakes in reply to 53DC, 07-26-2006 12:20:50  
Don"t forget to check the shaft that the brake disc slide on. Sometimes the splines get worn and will let the disc get stuck and not slide smoothly.



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HEYWOOD

07-26-2006 12:56:30




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 Re: Super M brakes in reply to 53DC, 07-26-2006 12:20:50  
The brakes are self energizing, but only when going forwad.



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Janicholson

07-26-2006 21:01:17




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 Re: Super M brakes in reply to HEYWOOD, 07-26-2006 12:56:30  
From My recollection, the mechanism is bi directional, and dependant on the little tabs that stick out from the actuator plates. The plates can go in either way, and are restricted in the same way internally on the outside of the housing!
JimN



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Janicholson

07-26-2006 12:30:17




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 Re: Super M brakes in reply to 53DC, 07-26-2006 12:20:50  
The disk brakes are "self energising" that means they assist in there own application. It is to do with the ramp and balls and the stops on the plates and there action with the friction plates and anchor points. Glazed surfaces will cause grabbing as will tempreature changes, humidity changes, stickie oil deposits on the disks, and sometimes no good reason. Clean the ramps and balls, make sure the little springs are good. Sand the disks (and check thickness) ( I put a skiff of lps corosion inhibitor on the balls and ramps to limit rusting, but not collect brake dust) Good luck. JimN

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the tractor vet

07-26-2006 12:26:21




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 Re: Super M brakes in reply to 53DC, 07-26-2006 12:20:50  
Take them apart And clean and inspect all parts . Where the balls ride that must be clean and rust free and the balls must be clean and shiny Do NOT use any grease anywhere in there Use powered graphit for lube or a spray graphit .



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