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Farmall & IHC Tractors Discussion Forum
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Belt pulley removal from crank - c123 engine, HELP

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RayP(MI)

09-11-2003 17:57:09




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Have been trying to remove the belt pulley from the front of the crankshaft on my Farmall 200. Using a 3 legged gear pulley. Have put a lot of force on that puller, used impact wrench, and breaker bar. I'm afraid of breaking the pulley. Have also hammered on shank of puller. Have turned the shaft of the puller until I'm out of threads, and only moved the pulley about 1/4 inch. The hole in the crank seems awfully deep! Is that pulley just force fit on the crank, or am I missing something? What's the technique for removing this thing without destroying the tractor?

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RayP(MI)

09-12-2003 14:12:01




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 Re: Belt pulley removal from crank - c123 engine, in reply to RayP(MI), 09-11-2003 17:57:09  
Thanks guys - no holes in pulley - made some and a homemade puller. Did what I couldn't do with a 3 jaw puller. See post above.



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bernard le mecano

03-08-2009 16:53:18




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 Re: 674 questions (PTO, Brakes, and Range) in reply to tipper, 03-07-2009 19:26:21  
Hi, to change the park brake band, the best way, is to lift the hydrolic cover. Bernard le mecano Quebec Canada



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RT (SE TX)

09-12-2003 10:13:53




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 Re: Belt pulley removal from crank - c123 engine, in reply to RayP(MI), 09-11-2003 17:57:09  
After stripping the threaded holes in the pulley using a balancer puller, I used a 3-jaw puller on the outside of the pulley. We tightened the puller as much we dared, then hit the side of the shaft of the pulley with a ball peen hammer. After every hammer blow, the puller would tighten up about a quarter turn. It came off using this method, and it doesn't look like the pulley is damaged. Can you still buy the wear sleeve for this pulley?

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David in UT

09-12-2003 04:50:14




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 Re: Belt pulley removal from crank - c123 engine, in reply to RayP(MI), 09-11-2003 17:57:09  
Ray,

The tool that CNKS refers to is a split bearing separator...it fits in behind the pulley, then the jaws of your puller grab on to it rather than the pulley. Here's a link to the JCWhitney catalog for one...has a picture that might be helpful.

I got lucky when removing the pulley off a C113 crank...a three jaw puller removed it without any problem. (Oh, and you're right...the depth of the puller shaft that dissappears into the pulley is a little surprising...or at least it was to me ;-) That said, the first take on that engine was with a different crank and pulley, and my machine shop guy broke it getting it off...so even professionals fight this battle! Maybe that just helped me rationalize having to buy a new pulley...ug.

Good luck!

- David

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Jonathan Mirgon

09-12-2003 03:40:50




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 Re: Belt pulley removal from crank - c123 engine, in reply to RayP(MI), 09-11-2003 17:57:09  
heat, heat and more heat, use an oxygene acettylene torch and get the crank and pulley very hot, and then your puller should remove it with ease, and the pulley will go back on as hard as it came off, use the heat method also to reinstall it.



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CNKS

09-11-2003 19:07:34




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 Re: Belt pulley removal from crank - c123 engine, in reply to RayP(MI), 09-11-2003 17:57:09  
Can't remember the name of it, but there is a gizmo you can buy at NAPA or elsewhere that fits behind the pulley, and under the puller to keep the pulley from breaking.



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Gary-Miss

09-11-2003 18:04:31




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 Re: Belt pulley removal from crank - c123 engine, in reply to RayP(MI), 09-11-2003 17:57:09  
The pulley is force fit so, it has to be tight! You need to have something in there over the end of the shaft. That will make it easier to turn. I usually drill a couple of holes through the pulley and use a harmonic ballancer puller. I put nuts on the back. Sooner or later (usuallysooner) the three legged puller isgoing to break a chunk out of the pulley and ruin your day. It will come eventually. Good luck.

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Nebraska Cowman

09-11-2003 18:00:26




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 Re: Belt pulley removal from crank - c123 engine, in reply to RayP(MI), 09-11-2003 17:57:09  
It's been 25 years since I have fought one off but it seems like there were threaded holes in the pulley. Yes they are press fit but they stand a lot of abuse.



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