I am trying to change the front wheel kingpins in my 1987 JCB 3CX, but having trouble removing the holding pin. It seems to be rusted in place.
I have hammered on the threaded side, but that has just bent the threaded part and I ended up snapping it off.
Before I try drilling it out, does anyone know a way of getting them out.
I thought about welding the threaded end of a bolt (with a nut on it) onto the non threaded side of the pin, and making a steel bracket to brace against the machine that the bolt will go through, then tightening up the nut against the bracket, hopefully pulling the pin out as it tightens up. I hope this makes sense?
*EDIT: See picture below.*
Cheers
Mike
Removing a kingpin pin.
-
- Moderator
- Posts: 8677
- Joined: Sun Aug 05, 2007 8:36 pm
- Real name: Jeremy Rowland
- Has thanked: 1873 times
- Been thanked: 1692 times
Re: Removing a kingpin pin.
Mike if this is a tapered pin that locks the kingpin into position in the axle then if they are anything like the ones that I used to take out of the Seddon Atkinson axles when I changed the kingpins on those trucks, the tapered pin could be a real pig to get out.
I recall that I once drilled one dead central and still struggled to get it out of the axle; you could try your idea but you may snap the weld on the pin before it moves, I would opt to carefully drill it out with a cobalt coated jobber drill, just a suggestion anyway.
Jeremy
I recall that I once drilled one dead central and still struggled to get it out of the axle; you could try your idea but you may snap the weld on the pin before it moves, I would opt to carefully drill it out with a cobalt coated jobber drill, just a suggestion anyway.
Jeremy
-
- Posts: 1007
- Joined: Mon May 06, 2013 11:02 am
- Real name: Paul Griffiths
- Has thanked: 384 times
- Been thanked: 256 times
- Flag:
Re: Removing a kingpin pin.
are still trying to remove the small cotter pin bolt thingo or is it the pin it self ?
King pins on trucks I have to use a jack and make up a press to push the pins out with axle in place or take the axle out and use a press
but I might be talking about a different kettle of fish
Paul
King pins on trucks I have to use a jack and make up a press to push the pins out with axle in place or take the axle out and use a press
but I might be talking about a different kettle of fish
Paul
Your better to die trying than live on your knees begging
Re: Removing a kingpin pin.
Last one we did ended up having to drill both the pins out.
it may be worth trying the puller in your post but as Jeremy said the weld is likely to snap before it moves.
it may be worth trying the puller in your post but as Jeremy said the weld is likely to snap before it moves.
-
Topic author - Posts: 94
- Joined: Sun Oct 19, 2014 6:32 pm
- Real name: Mike
- Has thanked: 6 times
- Been thanked: 3 times
- Flag:
Re: Removing a kingpin pin.
Mrsmackpaul - I am trying to remove the small holding pin.
mechman - Do you mean oxyacet to heat it up or to cut the pin out?
I think I'll try a mixture of heating it with oxyacet and the puller. and see how it goes. If that fails I'll have to drill it out.
Why is nothing easy on these things!!!
Regards
Mike
mechman - Do you mean oxyacet to heat it up or to cut the pin out?
I think I'll try a mixture of heating it with oxyacet and the puller. and see how it goes. If that fails I'll have to drill it out.
Why is nothing easy on these things!!!
Regards
Mike
-
- Posts: 501
- Joined: Mon Nov 18, 2013 4:13 pm
- Real name: norman orrick
- Location: N.E.Lincs
- Has thanked: 144 times
- Been thanked: 132 times
- Flag:
Re: Removing a kingpin pin.
Hi Mikerb.
I meant heat the axle up and use a straight punch on the pin but seeing as that you have a puller as well use them both together, as much tension as poss on the puller heat axle then use punch.
I meant heat the axle up and use a straight punch on the pin but seeing as that you have a puller as well use them both together, as much tension as poss on the puller heat axle then use punch.
-
- Posts: 2358
- Joined: Wed Dec 09, 2009 11:28 pm
- Real name: fred evans
- Has thanked: 1295 times
- Been thanked: 1111 times
- Flag:
Re: Removing a kingpin pin.
mechman wrote:Hi Mikerb.
I meant heat the axle up and use a straight punch on the pin but seeing as that you have a puller as well use them both together, as much tension as poss on the puller heat axle then use punch.
Yes,
I've done a few, I used to get the axle glowing before trying the pin.
Remember if you weld the pin and still have to drill it out , the weld may make drilling more difficult.
-
- Posts: 1007
- Joined: Mon May 06, 2013 11:02 am
- Real name: Paul Griffiths
- Has thanked: 384 times
- Been thanked: 256 times
- Flag:
Re: Removing a kingpin pin.
please forgive my my dumb thoughts BUTTTTTTTTTTTTTT
if it is the cotter pint as I call it that goes thru the axle and holds the king pin in the axle not the stub axle all the ones I have done wont come out like you are trying it will just get stuck tighter as you are trying to force it in further
the cotter pin is tappered and has to be driven thru the axle the nut that you have broken off is only to hold it in place the tighter you pull it the harder it will be wedged in
I have never ever had to heat I have always been told not to ever heat as you might weaken the steel in the axle or the stub axle
take note of the bolt circled with yellow also take note of red arrow showing tapper
unless we are all talking about something different I have never known of a different style of king pin set good luck with it all and if it is as I am describing your going the wrong way
Paul
if it is the cotter pint as I call it that goes thru the axle and holds the king pin in the axle not the stub axle all the ones I have done wont come out like you are trying it will just get stuck tighter as you are trying to force it in further
the cotter pin is tappered and has to be driven thru the axle the nut that you have broken off is only to hold it in place the tighter you pull it the harder it will be wedged in
I have never ever had to heat I have always been told not to ever heat as you might weaken the steel in the axle or the stub axle
take note of the bolt circled with yellow also take note of red arrow showing tapper
unless we are all talking about something different I have never known of a different style of king pin set good luck with it all and if it is as I am describing your going the wrong way
Paul
Your better to die trying than live on your knees begging
-
- Posts: 1007
- Joined: Mon May 06, 2013 11:02 am
- Real name: Paul Griffiths
- Has thanked: 384 times
- Been thanked: 256 times
- Flag:
Re: Removing a kingpin pin.
well just had a quick google
and if this is your machine you can see it is tappered and has to be driven thru as I have described
Paul
and if this is your machine you can see it is tappered and has to be driven thru as I have described
Paul
Your better to die trying than live on your knees begging
Who is online
Users browsing this forum: No registered users and 22 guests