Getting ready to remove crank pulley. Have read lots of advise here. Thanks for such a great site!
Posts say crank threaded for a 1/2 x 13TPI bolt, but I'm sure mine is 7/16 x 14TPI (1950 cub). Does this make sense?
Pulley has a brazing over one of the timing marks, so I want to replace pulley.
Would like to remove with a 3 jaw bearing puller. I don't care if pulley bends, I just want it off. I have been soaking with PB blaster for the last week and understand if I apply pressure, then heat and tap with hammer - this is best way to get it off.
I've owned the cub for 20+ years and did a restore back then but never rebuilt engine - now its time. Back then, Internet was just getting started and hard to get advise. Now Internet and videos make it reassuring to do anything on a cub.
Michael
Chapel Hill, NC.
PS. Machine shops in Raleigh NC area?
Crank pulley bolt size
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- 5+ Years
- Posts: 7
- Joined: Wed Sep 26, 2018 8:40 am
- Zip Code: 27516
- Tractors Owned: 1950 F Cub
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- 10+ Years
- Posts: 6561
- Joined: Tue Apr 27, 2010 11:34 am
- Zip Code: 27517
- Tractors Owned: '51 Cub #140966 "Bruno" with Woods 59 mower
'55 Cub #187541 "Betty" with Fast Hitch
'55 Cub #190482 "Ben" with Woods 42 mower
'55 Cub #191739 "Bertha" with Woods 42 mower
'56 Cub #194370 "Boris" with Mott Flail mower - Circle of Safety: Y
- Location: NC, Chapel Hill
Re: Crank pulley bolt size
I had a cub engine done by Hamilton Machine Works:
908 Withers Rd
Raleigh, NC 27603
I was lucky, though. There was a semi-retired guy, Lenny,
who was still working part time, and he did mine for the cost of parts plus an old Woods 42 mower. He knew Cubs because he owned a couple!! I would assume he is gone now, as that was a few years ago. So I have no idea what it would have cost otherwise. Knock on wood, it's still running strong!
PS Where are you located around Chapel Hill...we are "neighbors"! Maybe when things get better, we can meet for coffee and talk Cubs!

908 Withers Rd
Raleigh, NC 27603
I was lucky, though. There was a semi-retired guy, Lenny,
who was still working part time, and he did mine for the cost of parts plus an old Woods 42 mower. He knew Cubs because he owned a couple!! I would assume he is gone now, as that was a few years ago. So I have no idea what it would have cost otherwise. Knock on wood, it's still running strong!
PS Where are you located around Chapel Hill...we are "neighbors"! Maybe when things get better, we can meet for coffee and talk Cubs!


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- 10+ Years
- Posts: 5091
- Joined: Tue Jan 12, 2010 2:08 pm
- Zip Code: 12514
- Circle of Safety: Y
Re: Crank pulley bolt size
crank bolt threads are 1/2-13, pulley is cast, they do not bend, they break in to pieces, use a bearing splitter with the puller
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- 10+ Years
- Posts: 4053
- Joined: Thu Nov 09, 2006 11:26 pm
- Zip Code: 61722
Re: Crank pulley bolt size
10-4 on cast and breaking VERY easy! ----- IF you break it, you may never get it off, so use caution. ---- As TST says---use a bearing puller behind it!
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