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John Deere Tractors Discussion Forum
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JD # 5 Mower Drive Housing question?

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John in Ct

10-25-2006 15:33:57




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I was reading on P.9 of the JD operators manual for a # 5 mower and have a question about the shims that are removed to tighten the Timken bearings on the upper and lower shafts in the drive housing. I didn't take mine apart yet but think I may need new bearings and want to be prepared. So how does one know how many and what size shims to use? Does the pitman flywheel just pull off with a real good puller? Thanks!!

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Hayfarmer

10-26-2006 07:19:10




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 Re: JD # 5 Mower Drive Housing question? in reply to John in Ct, 10-25-2006 15:33:57  
I'm not sure of how much pre load should be on the bearing. It may be in the operator's manuel. Flywheel is held on with a tapered key, if you can pull it out a little, then tap it back in it will sometimes leave the key out. How hard they come off depends upon how long they have been on there. I have had them come off in the field.



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David from Kansas

10-26-2006 07:11:33




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 Re: JD # 5 Mower Drive Housing question? in reply to John in Ct, 10-25-2006 15:33:57  
John,
Since no one offered any suggestions/answers, I'll give it a shot. On the bearings, You will just have to use the trial-and-error method. Remove/add shims until there is no noticable play in the bearings. If you can turn the shaft by hand, you can add/remove shims until it turns hard, then add/remove until it turns without significant resistance. Why do you think you might need new bearings? Unless they were run dry, or had a lot of moisture in them, they usually last forever, as they run in gear oil. On the flywheel, yes they pull off the shaft, but I've removed some that were really difficult. It is possible to remove the flywheel and shaft as a unit from the front, if you remove the rear cover, chain, and chain sprocket, and then you have to remove the brace that connects to the bottom of the case to allow clearance for the flywheel/shaft to come out forward. Good luck.

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John in Ct

10-26-2006 13:45:11




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 Re: JD # 5 Mower Drive Housing question? in reply to David from Kansas, 10-26-2006 07:11:33  
Thanks for replying. I was just figuring worst case my bearings were shot. If I didn't have bad luck I wouldn't have any luck, heehee. Again thanks!!



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Hayfarmer

10-26-2006 07:23:24




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 Re: JD # 5 Mower Drive Housing question? in reply to David from Kansas, 10-26-2006 07:11:33  
If you decide to remove the whole unit from the front be aware the chain sprocket threads onto the shaft. Easiest time to remove it is before you remove chain so you can block the pto shaft and turn the flywheel.



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