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Farmall & IHC Tractors Discussion Forum
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300 brakes stick

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Levi K

08-10-2006 19:07:50




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Thought I better get the 300 out and strech 'er legs since she was being cooped up at the fair for a week. Started back to the farm from the nearest gravel road, I did use the brakes to slow down, but as I got goin, she all of a sudden started pulling hard like up a hill then it went easy. back to the shed, shut it off and saw that the right brake were smoken. Never done it before, what would cause it to do that and how do it fix it. Levi

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Formerly PaMike

08-11-2006 09:33:30




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 Re: 300 brakes stick in reply to Levi K, 08-10-2006 19:07:50  
Mine were hanging up after I rebuilt them and I found the problem to be rust and scale buildup on the inside diameter of the brake housing. The ramp setup would push out against the housing, then bind up.



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Unreserved dick

08-11-2006 08:28:14




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 Re: 300 brakes stick in reply to Levi K, 08-10-2006 19:07:50  
Best plan on taking them apart to see what the problem is. Something else to check in addition to the ramps and roller balls is whether the discs slide freely on the splined shaft. Last time I had problems with brake hang-up, that was the problem -- dirt, grease, etc. in the splines, plus the splines themselves had been chewed up some. Finally ended up taking a file to them to smooth them out.

Personally, I wouldn't lubricate the balls and ramps with anything with the possible exception of graphite -- anything sticky will just capture brake dust, etc. and eventually become more of a problem than a benefit.

Good luck.

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scotc

08-10-2006 19:37:15




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 Re: 300 brakes stick in reply to Levi K, 08-10-2006 19:07:50  
The brakes should release if you back up, I used to carry a big heavy wrench on the SM (identical setup just sized diffferent) to reach down and smack the face of the drum to release them. a cheap fix is to take the brakes off the tractor, and separate the sides of the expander rings by removing the 3 springs. If there aren't 3 springs on each one that's probably the problem. But I clean up the balls and ramps, then coating them with HIGH TEMP (copper or nickel-based) never-seize. Stick them back together, and make sure that when you put the adjuster bolts back in, they bend down again, or you'll replace them soon. It's not a perfect fix but for a half hour every couple years I can avoid having to buy new expander rings.

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