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John Deere Tractors Discussion Forum
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Help.620 crankshaft stuck

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Johnbob

12-03-2005 15:53:27




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I have a 620 with the main bearings stuck to the crankshaft.Must have been run out of oil.The other bearings are good.I have it all apart,but unable to get the crank out.Need help.




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JD man in SD

12-15-2005 17:55:21




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 Re: Help.620 crankshaft stuck in reply to Johnbob, 12-03-2005 15:53:27  
hey johnbob did you get the crank out call if you need help its free



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JD man in SD

12-05-2005 05:43:49




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 Re: Help.620 crankshaft stuck in reply to Johnbob, 12-03-2005 15:53:27  
if you could find otc sleeve puller you could bolt to left hand main using to main mounting holes and use center bolt on puller to push crank out of main



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JDBert

12-04-2005 08:41:35




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 Re: Help.620 crankshaft stuck in reply to Johnbob, 12-03-2005 15:53:27  
I just tore apart a 70 that had been sitting out in the open (crankcase open) I used a bottle jack between the main case and a rod journal, put as much pressure on it as I could, heated and soaked with PB blaster, it eventually came. 1 mistake I made was the clutch side came off first, KEEP BOTH together or you start to bind it. A 70 is a 1 piece main and I'm not really sure about a 620? Your gonna have to do new bearing and grind the crank, SO if your going to ruin anything ruin these. Send it in for grinding and make sure to have it crack checked and straitened.

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JDman inSD

12-04-2005 05:10:50




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 Re: Help.620 crankshaft stuck in reply to Johnbob, 12-03-2005 15:53:27  
I would remove the cap screws on both mains and install long bolts in there place 4in or 5in. use heavy drift pin on flywheel side, put short cap screw in clutch end of crank .drive crank to left & right untill you get room to install a puller on one main or the other. if you need more help call me at 605 256 3223



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Johnbob

12-04-2005 07:36:33




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 Re: Help.620 crankshaft stuck in reply to JDman inSD, 12-04-2005 05:10:50  
Bearing housing bolts out.Used a 12# sledge to try to move it in the housing,but no move.It is so tite that it takes a 10 ft.bar to rotate the crank.
I'm about to take a disk grinder and split the bearing housing.HELP



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