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cub brake

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khouse6

02-01-2017 13:43:57




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left wheel brake was not holding on older cub: about 1950 model. tore tractor down. bolt in brake wheel was broken. replaced it and it held fine for a few weeks. failed again. tore back down, bolt was loose. cleaned it up, put some lock tite on bolt. held for a few weeks and failed again. any suggestions?




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Jim Becker

02-01-2017 20:20:25




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 Re: cub brake in reply to khouse6, 02-01-2017 13:43:57  
I know it is a diagram from CaseIH. What I don't know is how that diagram ended up saying it is a 3/8 capscrew.



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john *.?-!.* cub owner

02-01-2017 19:17:39




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 Re: cub brake in reply to khouse6, 02-01-2017 13:43:57  
Slide the drum off and see if the hole in it is "wallered" out. If so, it will keep coming loose till you get a new drum. Like wise with the shaft being worn.



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khouse6

02-01-2017 20:09:18




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 Re: cub brake in reply to john *.?-!.* cub owner, 02-01-2017 19:17:39  
thanks



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Roster

02-01-2017 19:01:06




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 Re: cub brake in reply to khouse6, 02-01-2017 13:43:57  
Open your email,,might have some parts to help you.



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Jim Becker

02-01-2017 18:37:57




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 Re: cub brake in reply to khouse6, 02-01-2017 13:43:57  
The hole in the drum is threaded, mandating use of whatever thread the hole has. The original printed parts catalogs just called it a lock screw. I don't know where the online list (that JAN linked to) got the capscrew and 3/8 from. Some of the IH parts didn't translate well when they went online.

TM Tractor has the right thing.

www<dot>tmtractor<dot>com/new/br/4721fp.htm

It should be a cup pointed setscrew with a locknut. The setscrew goes in directly on top of the woodruff key. I suggest a new setscrew and a new key. Then tighten the ^%$& out of it. If the shaft or center hole of the drum are worn, you will probably have the problem again.

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Janicholson

02-01-2017 19:04:30




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 Re: cub brake in reply to Jim Becker, 02-01-2017 18:37:57  
It is from Caseih.com Parts diagrams. Setscrews are tough material. Loose fit on the drum will cause failure every time. Jim



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Janicholson

02-01-2017 15:24:59




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 Re: cub brake in reply to khouse6, 02-01-2017 13:43:57  
I see only a woodruff Key holding the brake drum the the differential shaft. What bolt are you discussing.



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khouse6

02-01-2017 15:32:11




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 Re: cub brake in reply to Janicholson, 02-01-2017 15:24:59  
the woodruff key keeps the drum from turning on the shaft. there is a bolt and locking nut that holds the drum in position, on the shaft. thinking about a small spot weld. sigh



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Janicholson

02-01-2017 16:23:54




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 Re: cub brake in reply to khouse6, 02-01-2017 15:32:11  
I see a 5/16" 18 bolt/nut in the parts list. Using a grade 8 bolt or socket head cap screw with fine thread and locktite would be a good option. If the drum is loose on the shaft, it will be a problem and fail again. if the woodruff key is loose in its pocket and way, again it will fail. Jim



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