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656 PTO input shaft replacment.


 
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Eagle Beagle
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Joined: 21 Nov 2015
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PostPosted: Fri Jan 15, 2021 6:53 am    Post subject: 656 PTO input shaft replacment. Reply to specific post Reply with quote

The splines are shot on the PTO input shaft and my IT manual shows bumping the shaft of the driven gear back enough that the driven gear will drop down. As it is now, only the bearing cage of the input catches on the gear.

Do I need to split the TA away from the transmission and proceed with further disassembly or is there a shortcut to get the shaft out.

Thank you for any sugesstions.

Beagle
 
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pete 23
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PostPosted: Fri Jan 15, 2021 6:04 pm    Post subject: Re: 656 PTO input shaft replacment. Reply to specific post Reply with quote

Unfortunately, it is not easy. Either split TA section from rear or, I have done it without split because tractor with cab and all, lot of work to remove TA section.

You can pull rear pto unit, then move to the rear, the shaft driving rear unit. Take T cover off underneath TA. There is a snap ring holding rear bearing of that lower shaft. Take snap ring out, not easy but can be done. Then take cover off below gear on lower shaft. Take plug out of housing to get bolt out that is holding gear onto shaft. There is a tapered wedge washer holding gear onto shaft.

Put good blocking behind gear and tap that shaft back out of gear. May pop right off but most likely will be difficult. The better you block that gear the easier it is to get it to move. Drop gear down a little and your upper shaft will come right out.
 
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Eagle Beagle
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PostPosted: Fri Jan 15, 2021 6:54 pm    Post subject: Re: 656 PTO input shaft replacment. Reply to specific post Reply with quote

Thank you for the reply, no cab on this one and the TA stand on casters is almost finished. Good tip about backing up the gear.

I was wondering if some one was to cut the roller bearing cage with a Dremel tool and then pack the rollers in heavy grease. Spread the cage open and pull out the rollers as you slowly rotated the cage.

Installation would mean freezing the new input gear and shaft and then heating the new bearing to 275-300 degrees. Have a helper hold the bearing in the race and quickly push the shaft into the bearing.

Just a thought. With my luck those rollers would drop down and I could never fish them all out!

Beagle
 
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