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Case Tractors Discussion Forum
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G 188D Crank pulley

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Wrenchbender

04-13-2005 16:49:40




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I'm trying to remove the nut on the crank pulley. Is it right hand thread? Any tricks on removing? I've had a good 1/2" impact on it and no luck. Thanks, WB.




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jdemaris

04-14-2005 06:02:28




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 Re: G 188D Crank pulley in reply to Wrenchbender, 04-13-2005 16:49:40  
I've has a few like that. It's conventional right-hand thread. I usually take a flat-ended pin the same diamater at the bolt-head, and along with a good size hammer, give it a good rap. Make sure it's straight on so you don't damage the square hole. This often shocks it sufficiently to get it out. I use a 3/4 inch drive breaker with and adapter for the 1/2" drive. This allows you to give good steady pressure without wobbling. Works MUCH better than using a 1/2" drive. In worse case scenarios, where you think you're going to strip it, and hammer-shocking, and/or moderate heat has not worked - this will. Get a big flame on your torch, better yet use a rosebud if you have one, get the bolt head hot as fast as possible - do so until it starts turning orange - then quickly douse it with cold water. Then let all sit until cool. It will then come right out, but the bolt will have lost its hardness and be ruined. The heat needs to be done quickly so it doesn't conduct and travel into the crankshaft.

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BKahler

04-13-2005 17:23:16




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 Re: G 188D Crank pulley in reply to Wrenchbender, 04-13-2005 16:49:40  
WB,

I went through the same ordeal with my 188D just recently. My efforts ended up ruining the square drive portion of the nut. I ended up having to heat the nut with a torch to glowing red, let it cool down for several hours and then used a pipe wrench on it with a 5' cheater bar. It took a continous pressure on the end of the cheater bar before it finally started to give.

This method was recommended to me by Bill Wallace and it worked like a champ.

He informed me that when using heat like that to make sure I let it cool down so as not to affect the crank itself. The metals needed to stabilize before applying pressure.

Hope this helps,

Brad

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Wrenchbender

04-13-2005 17:28:44




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 Re: G 188D Crank pulley in reply to BKahler, 04-13-2005 17:23:16  
Thanks Brad, Heat was my next step, I wondered if it had loctite and heat would loosen it. WB.



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