1490 trunion pin

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johnwalsh
Posts: 32
Joined: Tue Jan 01, 2013 10:45 pm
Location: ireland

1490 trunion pin

Post by johnwalsh » Tue Mar 10, 2015 9:38 pm

Can some one tel me is it normal for the nut on the front of the trunion pin to
Be loose , I know the pin won't fall out because there is a bolt going through
The axel and pin ,when I tighten the front nut on the trunion pin and after some
Time it becomes hand loose. I replaced the bushes in the front castings . Any
Info would be great.

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ollek
Posts: 3815
Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

RE: 1490 trunion pin

Post by ollek » Wed Mar 11, 2015 6:35 am

A nut on the front of the trunion pin??? Can you please have a look in the official Case IH parts catalogue and tell us what part you are talking about. Use the link www.partstore.caseih.com and select your tractor model.

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johnwalsh
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Joined: Tue Jan 01, 2013 10:45 pm
Location: ireland

1490 pivot pin nut

Post by johnwalsh » Wed Mar 11, 2015 7:20 am

Sorry I should have said pivot pin nut!!!

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ollek
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Joined: Tue Apr 10, 2012 1:20 pm
Location: South West Finland

RE: 1490 pivot pin nut

Post by ollek » Wed Mar 11, 2015 7:39 am

Still not clear what you are talking about. There is many pivot pins in a tractor. There is indeed a bolt going through the trunion pin, but there is no nut in the front end of the pin.

JamesF
Posts: 1327
Joined: Tue Mar 14, 2006 8:49 pm
Location: South Yorkshire

RE: 1490 pivot pin nut

Post by JamesF » Wed Mar 11, 2015 8:30 am

The only nut on the front axle pivot pin is the special screwed bush as it it's called which together with the wired bolt stops the front axle pin from coming out.

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ollek
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Location: South West Finland

RE: 1490 pivot pin nut

Post by ollek » Wed Mar 11, 2015 9:37 am

JamesF, you are absolutely right.

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johnwalsh
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Joined: Tue Jan 01, 2013 10:45 pm
Location: ireland

RE: 1490 pivot pin nut

Post by johnwalsh » Wed Mar 11, 2015 3:57 pm

Sorry for not explaining my question properly ,I found a manual and it seems what I'm talking about might be called an adapter bolt
Used to remove the trunion pin with a slide hammer, in my 1490 the bolt was left in the pin
I assumed it had some other use.

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case-ih1594
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Location: Preston

RE: 1490 pivot pin nut

Post by case-ih1594 » Wed Mar 11, 2015 7:20 pm

Hi, if this is just a bolt screwed into the threaded trunnion pin then it will need removing, as it could otherwise strips threads, or break.

It would be 'trying' to extract the trunnion pin (never a good thing!) and the previously mentioned bolt is all that holds the trunnion pin in place.

On the DB 770 / 780, the forward facing threaded trunnion pin was covered with domed washer / core plug that tidied the front end up.

JamesF
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Joined: Tue Mar 14, 2006 8:49 pm
Location: South Yorkshire

RE: 1490 pivot pin nut

Post by JamesF » Wed Mar 11, 2015 9:31 pm

The pin has a 5/8 UNC thread in it for withdrawing it. It sounds like someone has left something in it that shouldn't be there.

Some 90/94 series tractors had a plug covering the end of the pin so contaminants couldn't get into the bush or the threaded hole.

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johnwalsh
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Joined: Tue Jan 01, 2013 10:45 pm
Location: ireland

RE: 1490 pivot pin nut

Post by johnwalsh » Wed Mar 11, 2015 9:43 pm

Thanks lads I will take out the bolt now that I know it's not ment to stay there,
It will come in handy if I need to remove the pin again with the slide hammer.

Guest

RE: 1490 pivot pin nut

Post by Guest » Wed Mar 11, 2015 9:55 pm

I've come across several that have a short thread bolt in the trunnion, probably to keep the thread in the hole clean, if the bolt head is right against the end of the trunnion and not interfering with or fouling anything I would leave it there.

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johnwalsh
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Joined: Tue Jan 01, 2013 10:45 pm
Location: ireland

RE: 1490 pivot pin nut

Post by johnwalsh » Wed Mar 11, 2015 10:48 pm

I replaced the bushes in the castings nylon bushes , the bolt was threaded into the pivot pin before I replaced the bushes so
Maybe leave it in there just not tighten it up!!

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