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David Brown 885, left brake seized up

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David Ransom

07-21-2002 22:18:14




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I don't think this is a rust problem, as this is a working tractor that we use frequently, not a tractor shaped piece of rust. A few weeks ago when I was mowing some hay, I noticed that the left brake was a little harder to push past a certain point than usual, but once it started moving, it worked OK and I didn't think too much of it. A few days ago, I went to start the tractor, and it wouldn't go down the hill when I pushed the clutch. William pushed on the left back tire, and it started going down the hill, a bit too slowly and squeaking like I was riding the brakes. I let the clutch back up and got off. We troubleshot the problem down to the left brake inside the left final drive housing. The thing that sticks down from this housing, the thing that the linkage moves when one pushes the pedal, is seized up. My father pounded it with a wrench until the tractor is usable, but I'd like to be able to use the left brake.

OK, the shop manual probably covers all that, the real point of my post is this: Has this happened to any of you? What was the cause? Anything I need to know?

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Elmer

07-22-2002 04:27:02




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 Re: David Brown 885, left brake seized up in reply to David Ransom, 07-21-2002 22:18:14  
It is common for the actuator shaft to sieze in the final drive housing. If you own a David Brown tractor for a number of years you will eventually experience this. You have to remove the wheel and then remove the final drive. Remove the shoes and then punch out the locking pin on the actuator lever and then remove the lever. The actuator shaft will pull out and you can sand it up with emery cloth. When putting it back together make sure you use lots of anti sieze compound in there. They don't put grease nipples in there for risk of pumping the brakes full of grease. The shaft should have a dirt seal on the inner side and an O ring on the outter side of the shaft. When doing the right brake. MAKE SURE YOU TIE THE DIFF LOCK DOWN or the lock collar will fall to the bottom of the housing. It slides on the axle shaft. When tied down it stays engaged into the differential assembly. Ther are two seals in there you'llneed to replace too.

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