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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Fiat built tractor brakes

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rrman61

07-19-2020 06:42:36




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How involved is it to replace the brakes on a fiat built (445 long) tractor?i assume when the adjustment rod is maxed out to as long as possible that Iím out of brakes or is it opposite?




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Mitch Poindexter

07-19-2020 19:30:27




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 Re: Fiat built tractor brakes in reply to rrman61, 07-19-2020 06:42:36  
The differential supports are bolted on to the rear housing and locked with metal tabs. The supports hold the bearing race for the differential bearings as well as the oil seals that the axles go through. You will be able to see them once you have pulled the final drives out of the rear end. There are factory shims between supports and the housing which are used to provide proper pre-load on the differential bearings.

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rrman61

07-19-2020 19:33:14




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 Re: Fiat built tractor brakes in reply to Mitch Poindexter, 07-19-2020 19:30:27  
Ok thanks again



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Mitch Poindexter

07-19-2020 13:09:07




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 Re: Fiat built tractor brakes in reply to rrman61, 07-19-2020 06:42:36  
Yes, she is the boss, just ask her. Make sure you loosen the brake linkage ahead of time, that will make sure the brake band doesn't catch the brake drum and cause you difficulty during removal. I'd say the most important thing to pay attention to (other than not dropping the final drive on your toe) is making sure you pull it straight out until the axle has cleared the rear differential seal. You don't want those axle splines to ruin that seal because replacing that seal requires taking the differential supports off. That turns this job from a minor annoyance into an immediate PITA. Careful reassembly is just as important.

You can determine ahead of time if your rear axle housing seals are leaking by looking directly under the rear housing just below the axle. There is a hole in the bottom of the rear housing with a cotter pin sticking out of it, one on both sides. This is your tattle tail hole to let you know if your rear end differential seals are leaking and prevents oil from getting on the brake bands if they are. It is very disappointing to start the project with these holes dry and finish the project and find them leaking.

Once the final drive housings are off, you remove the little rectangular inspection cover off the rear housing near the brake linkage, then remove the setscrew that holds the break lever on and you can remove the brake bands.

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rrman61

07-19-2020 16:54:16




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 Re: Fiat built tractor brakes in reply to Mitch Poindexter, 07-19-2020 13:09:07  
One more question: what are you calling the differential supports?



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rrman61

07-19-2020 15:51:01




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 Re: Fiat built tractor brakes in reply to Mitch Poindexter, 07-19-2020 13:09:07  
Great,both holes are wet with oil, one wet the other dripping.the right oneís cotter key is missing.you sure explained all that in detail.thanks that makes the job a lot easier knowing what to look for



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Mitch Poindexter

07-19-2020 12:02:50




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 Re: Fiat built tractor brakes in reply to rrman61, 07-19-2020 06:42:36  
Yes, you have to take the whole thing off, the brake bands are located on the outside edge of the rear end housing. You will need to remove what is in the picture in order to get to the brake bands on each side.



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rrman61

07-19-2020 12:16:39




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 Re: Fiat built tractor brakes in reply to Mitch Poindexter, 07-19-2020 12:02:50  
Well thatís not fair you had a helper!or is she the foreman?Lol ok got it.is there anything I have to be careful of when itís coming apart?



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Mitch Poindexter

07-19-2020 07:21:29




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 Re: Fiat built tractor brakes in reply to rrman61, 07-19-2020 06:42:36  
You have to pull the final drive housing off of the rear end. The drum comes out with the final drive and the brake band stays with the rear end housing. Not hard, just a little cumbersome because the final drives are a little lopsided. A lifting eye installed in a location around the bull gear housing is a big help to keep it stable as you remove and then try to reinstall. Ive replaced a couple of sets, there are 2 sizes of brake bands and you will have to measure yours to know for sure which to order.

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rrman61

07-19-2020 11:25:36




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 Re: Fiat built tractor brakes in reply to Mitch Poindexter, 07-19-2020 07:21:29  
The final drive near the wheel or the axle housing?Iím trying to understand why the linkages are under the rear end itself?does the axle housing have to come off too?



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