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7050 pto shims?
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DIESEL View Drop Down
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Joined: 26 Aug 2013
Location: Sandhills
Points: 259 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DIESEL Quote  Post ReplyReply Direct Link To This Post Topic: 7050 pto shims?
    Posted: 06 Feb 2021 at 2:57pm
I replaced the pto in my 7050, new races and bearings internally. I didn't replace the metal shims between the cover and the tractor. Was I supposed too, and if so why? Thanks guys!

Edited by DIESEL - 06 Feb 2021 at 2:58pm
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Joined: 12 Sep 2009
Points: 21866 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2021 at 4:07pm
99% of the time, the original shim stack will be alright. Bearings shouldn't have had any endplay and not been preloaded to any serious extent.
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Joined: 26 Aug 2013
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Points: 259 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DIESEL Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2021 at 4:52pm
Thanks Doc! Forgive my ignorance here as this is the first time I've done one of these and I'm by no means a mechanic. Once I get the cover thght and there isn't any play foreword or backward I assume that the shims are good?
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Points: 21866 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2021 at 5:55pm
They could be too tight !!! Slowly snug up the bolts knowing there is endplay and watch the endplay disappear. A vice grips on the PTO shaft should be easily able to turn the shaft, allowing for the drag of the clutch discs up above. That's the part that is hard to explain. It will take at least one full revolution of the PTO shaft to seat the rollers in the bearings to determine if it is too tight or not.
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Joined: 26 Aug 2013
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Points: 259 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DIESEL Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2021 at 7:17pm
I have the bolts snug and I can turn the pto by hand. There is no horizontal play in the pto.
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Points: 21866 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2021 at 7:31pm

So, then you are maybe good. Finish tightening the bolts and turn the shaft at least one full revolution.



Edited by DrAllis - 06 Feb 2021 at 7:33pm
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Points: 259 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DIESEL Quote  Post ReplyReply Direct Link To This Post Posted: 06 Feb 2021 at 9:00pm
Thanks Doc, as always I appreciate you're knowledge!
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