Smallholders Insurance from Greenlands

Author Topic: PTO shaft removal  (Read 218 times)

Christian

  • Joined Jun 2012
PTO shaft removal
« on: July 31, 2022, 12:27:56 pm »
Hi Folks,

I've recently bought a well used, rear mounted PTO driven disc mower (not sure about the make). It came with a broken PTO shaft that needs replaced. But how? Here's a photo of the connection. There was a small pin in there that went through the bolt - I've taken that out. Should I now be able to simply pull the old shaft off, or is it somehow screwed on? The thread on the bold (if that's what it is) looks damaged (flattened) - will that go?

Thanks a lot!

Christian 

Forestlens

  • Joined Jul 2020
  • North Devon
Re: PTO shaft removal
« Reply #1 on: July 31, 2022, 05:19:28 pm »
Hard to tell from the photo but that flattened “bolt” is probably a pin that is driven out. Unless there’s a hexagonal head on the other side of it. It may be easier said than done. There looks to be a castellated nut behind it. The purpose of the bolt/ pin is to prevent the castellated nut from turning. You may have to resort to heat as well as a good hammer or even drill it out.
If the PTO yoke is in good shape then it might be easier to separate the universal joint to replace the shaft!

Good luck  :fc:!

chrismahon

  • Joined Dec 2011
  • Gascony, France
Re: PTO shaft removal
« Reply #2 on: August 01, 2022, 07:46:12 am »
It would normally be a split pin inserted through the nut and a hole in the thread. Having said that I have seen a nail used and that does look like a nail head? I'd get a blow torch on it and a wire brush so you can see better. What can you see on the other side?

Christian

  • Joined Jun 2012
Re: PTO shaft removal
« Reply #3 on: August 01, 2022, 06:57:58 pm »
You guys are amazing, thank you!

So yes, there is a castellated nut behind a split pin. I got the pin out no problem. So I guess I should now be able to unscrew the castellated nut? Is it a normal thread (unscrew counter clockwise)? And then pull it off? I do like the idea of separating the joint instead - looks easy on youtube....

chrismahon

  • Joined Dec 2011
  • Gascony, France
Re: PTO shaft removal
« Reply #4 on: August 01, 2022, 07:18:11 pm »
A Left Handed thread has caught me out many years ago- Mini rear wheel bearings. So don't be afraid to tighten the nut if it refuses to budge as you expect it to. When I was an apprentice I was told to tighten a rusted nut before unscrewing it- has always worked for me.

Forestlens

  • Joined Jul 2020
  • North Devon
Re: PTO shaft removal
« Reply #5 on: August 01, 2022, 09:50:15 pm »
That’s good news! The next challenge is finding a spanner/socket to fit that nut! Heat may well be needed at that point! On the plus side there does seem to be plenty of oil about so it may be a non-event!

 

Advise on correct PTO shaft

Started by borg (9.21)

Replies: 7
Views: 2168
Last post May 26, 2015, 08:22:34 pm
by shep53
Rust pocks on hydraulic cylinder shaft!

Started by arobwk (9.01)

Replies: 16
Views: 3759
Last post August 21, 2019, 07:29:57 pm
by arobwk
landrover 200TDi damper (crankshaft pulley) bolt removal

Started by mab (7.43)

Replies: 16
Views: 9910
Last post June 09, 2013, 08:38:33 pm
by spandit

Forum sponsors

FibreHut Energy Helpline Thomson & Morgan Time for Paws Scottish Smallholder & Grower Festival Ark Farm Livestock Movement Service

© The Accidental Smallholder Ltd 2003-2022. All rights reserved.

Design by Furness Internet

Site developed by Champion IS