Lower Link Mounting Pin

RossM · Post by **RossM** » Fri Nov 13, 2009 12:42 pm

Lastnight I removed the rear linkage to find that the castle nut on one of the lower link mounting pins had been welded on. Once the weld had been removed and the nut split it became apparent the thread had been totally stripped, hence the weld.

I realise that to change this means removing the trumpet housing but wonderd if anyone had experience or recommendations around recutting the thread on the pin with a die set and using a suitable replacement Castle Nut?

Mervyn Spencer · Post by **Mervyn Spencer** » Fri Nov 13, 2009 4:38 pm

Hi Ross

Interesting question. For my 3/8" and 5/16" bolts and studs I used what I think is called a die nut to cut fresh threads. Whether you are able to buy those to fit your bolt is another question. I found mine very useful.

Kind regards
Mervyn

Mark · Post by **Mark** » Fri Nov 13, 2009 11:10 pm

Ross,
I don't know how much it costs in England, here they are really expensive here, about $120.00. I bought one for a M)((&y F_(*^**n for $25.00. The bevel that goes in the trumpet housing is bigger or smaller than the Dexta I don't remember, I took it to a friend of mine that has a machine shop and he made me one out the two. It's been a few years and it's showing no signs of trouble yet.

Chris Ivin · Post by **Chris Ivin** » Sat Nov 14, 2009 1:21 pm

Lastnight I removed the rear linkage to find that the castle nut on one of the lower link mounting pins had been welded on

I had the same problem, luckily I managed to free the nut with the angle grinder. The threads were damaged but not stripped, I hadn't got a die set so I used a small file and carefully cleaned the threads up where the weld had been until I could get a new nut on. It was a little bit tight but went on OK.

As your threads are stripped it is a slightly different situaltion, if you recut the thread smaller will it be man enough for the task? The lower link arm mounting pins are available at only £12.00 (Agriline), however it is the hassle of fitting them!

RossM · Post by **RossM** » Mon Nov 16, 2009 1:28 pm

If I remove the trumpet housing can i do it whole (with the aid of a strong friend!) without having to take the half shaft off first etc? If so i think i might go for the new pin option then its done properly.

Mark · Post by **Mark** » Mon Nov 16, 2009 4:27 pm

Ross,
You will have to take the axle out first, then the backing plate of the brake, get it out of the way, then take all the nuts off of the trumpet housing except the top one. Be sure you have some help unless you're a young man and have a strong back because it is heavy. When your ready take off the top nut pull it back and lower it to the ground or work bench, now you can take the nut off the lower link pin and replace it. You will need a new gasket or you can make one, your choice. They are not expensive and you can still get them from you CNH dealer.

Mervyn Spencer · Post by **Mervyn Spencer** » Mon Nov 16, 2009 8:11 pm

Mark, I'm curious as to why you would you leave the top bolt in? Do you then swing the housing up on that bolt to give you access to the offending link bolt?

Mark · Post by **Mark** » Tue Nov 17, 2009 4:24 am

Mervyn,
My mistake I failed to put that part in, thanks for catching it. I'll go back and edit it.
Thanks again

Post by **Brian** » Tue Nov 17, 2009 9:31 am

You don't have to take the axle out. It will all come out as one piece. This reduces the time to do the job and if you don't have to do the axle seal its extra work.

You do need two people or a crane though.

If you can also find a long bolt and cut the head off, to act as a guide bolt it helps. Otherwise a piece of bar to fit in a couple of the holes to help you slide the axle into position.

RossM · Post by **RossM** » Tue Nov 17, 2009 2:37 pm

Thanks guys, especially Brian as you've confirmed what i was hoping which should make the job easier.

Jerry Coles · Post by **Jerry Coles** » Wed Nov 18, 2009 10:14 pm

The pins are available from Agriline and come complete. They have a reverse taper to them hence the reason you have to remove the trumpet to push in the old one and fit the new one from inside out.
If you look at the Dexta Service Manual in section 7 on page 2 there is a clear illustration of the pin assembly. It's down on my 'One day I'll have to get round to doing it' list!

RossM · Post by **RossM** » Thu Nov 19, 2009 10:22 pm

New pin arrived yesterday and I've just been down the the lock-up, remove the axle trumpet housing as a whole unit, removed old pin and fitted the new one. Then bolted the trumpet housing assembly back up. A nice easy half hour job.

Only problem now is I need a new Castle nut. Anyone know what size it is?

Nick · Post by **Nick** » Mon Dec 31, 2018 6:28 pm

I had a loose lower link pin on my dexta, which meant that oil from the backend was weeping out. Whilst I had the PTO shaft out to replace the leaking PTO seal, I looked in the backend and could see the nut from the link arm pin, so I was able to tighten it up without taking the axle trumpet off. Can you replace the pin this way?

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Lower Link Mounting Pin

Lower Link Mounting Pin

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