Cylinder head nuts

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Nick
Posts: 9
Joined: Tue Jul 09, 2019 9:51 pm
Location: Aberystwyth

Cylinder head nuts

Post by Nick » Mon Sep 02, 2019 9:13 pm

Need some help please I am rebuilding my 995, but I seem to have lost one of the cylinder head nuts, it's one of the normal size ones I think, does anyone know the size of it and where I can get a replacement from.
Please help.
Arnie

Berk
Posts: 82
Joined: Wed Nov 22, 2017 5:41 pm
Location: Carmarthenshire

Re: Cylinder head nuts

Post by Berk » Mon Sep 02, 2019 11:12 pm

I imagine This will probably tell you what you need

Nick
Posts: 9
Joined: Tue Jul 09, 2019 9:51 pm
Location: Aberystwyth

Re: Cylinder head nuts

Post by Nick » Tue Sep 03, 2019 7:55 am

Thanks for that, I can see the part but it won't let me buy them , are there any dealers in The U.K. Web site says not.

Nick
Posts: 9
Joined: Tue Jul 09, 2019 9:51 pm
Location: Aberystwyth

Re: Cylinder head nuts

Post by Nick » Tue Sep 03, 2019 8:25 am

I don't suppose you have any spares Berk, as you are just down the road from me. Thanks for the info I am going to try a few places in town now I know the size.
Really hoping I can get one dying to get it started after having the head work done. :D

Berk
Posts: 82
Joined: Wed Nov 22, 2017 5:41 pm
Location: Carmarthenshire

Re: Cylinder head nuts

Post by Berk » Tue Sep 03, 2019 8:32 am

I know a bloke. Will PM you his info.

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

Re: Cylinder head nuts

Post by ollek » Tue Sep 03, 2019 10:17 am

Berk, you wrote "are there any dealers in The U.K. Web site says not". Please ask your local Case IH dealer. Google "case ih dealers uk" You will have to know that the electronic parts catalogue is operated by case IH in the USA. Please, do not use any standard nuts for this application. The nuts are "special" as said in the parts catalogue.

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cobbadog
Posts: 610
Joined: Tue Oct 11, 2011 6:18 am
Location: beautiful Coopernook NSW. near Taree. NSW. Australia

Re: Cylinder head nuts

Post by cobbadog » Tue Sep 03, 2019 12:12 pm

I do not doubt your comment on the nuts ollek but just out of curiosity what makes them so special that a standard nut won't work.
The question is only about trying to learn not criticise.

Berk
Posts: 82
Joined: Wed Nov 22, 2017 5:41 pm
Location: Carmarthenshire

Re: Cylinder head nuts

Post by Berk » Tue Sep 03, 2019 1:54 pm

ollek wrote:
Tue Sep 03, 2019 10:17 am
Berk, you wrote "are there any dealers in The U.K. Web site says not".
No I didn't. Other fella did.

Passed him information for a local DB breaker, who I know has all the appropriate parts, and contacts for new parts if needed.

philedge
Posts: 239
Joined: Sun Dec 03, 2006 11:27 am
Location: Chester UK

Re: Cylinder head nuts

Post by philedge » Tue Sep 03, 2019 1:57 pm

Nick. If you look onEbay theres a guy in carmarthen selling a head off a busted engine. Fair chance hes got some head bolts he'll part with??
'66 880 Selectamatic rat.

Nick
Posts: 9
Joined: Tue Jul 09, 2019 9:51 pm
Location: Aberystwyth

Re: Cylinder head nuts

Post by Nick » Tue Sep 03, 2019 3:20 pm

Thanks everyone for your help with this I have found a bearing supplier in Aberystwyth that holds almost every nut and bolt you can think of, I bought two nuts 1/2 uni in stock and now fitted to my tractor, just need to set valve clearances and fill fluids up, when it stops raining.
Thanks again everyone, much appreciated.

Berk
Posts: 82
Joined: Wed Nov 22, 2017 5:41 pm
Location: Carmarthenshire

Re: Cylinder head nuts

Post by Berk » Tue Sep 03, 2019 4:08 pm

Nick wrote:
Tue Sep 03, 2019 3:20 pm
when it stops raining.
June then, by the looks of it here. :D

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cobbadog
Posts: 610
Joined: Tue Oct 11, 2011 6:18 am
Location: beautiful Coopernook NSW. near Taree. NSW. Australia

Re: Cylinder head nuts

Post by cobbadog » Thu Sep 05, 2019 6:38 am

At the risk of sounding as if I am nagging, could ollek explain about what makes the D.B. head nuts sspecial as opposed to something available over the counter.

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

Re: Cylinder head nuts

Post by ollek » Thu Sep 05, 2019 8:48 am

Well, the manufacturer found out that standard nut wouldn't do the job, so they fitted specially made one for the purpose. This is all that you have to know. If Cobbadog want to fit standard nuts, he has the right do so, but there is most likely problems around the corner in doing so.

ALANJ
Posts: 49
Joined: Wed Oct 11, 2017 9:13 pm
Location: Co. Durham

Re: Cylinder head nuts

Post by ALANJ » Thu Sep 05, 2019 9:54 am

To add to OLLEK,s comment- as I understand it the problem with a "standard" nut is the thread profile. With this design excess loading is taken by the single thread nearest the loading.Over time the piston pulses may wear the thread with consequent loss of clamping force. Head gasket failure may then occur.
The genuine DB nuts have a different thread profile to ensure the loading from the shank stud is more evenly distributed over all threads.
Years later I believe this thread profile was adopted by an American tractor manufacturer on their hydraulic pumps and given the sales name of "Spiralock"
To conclude, using a " standard" nut will get you going but head gasket failure may ensue further down the road.I would therefore always recommend the genuine article .Hope this helps.AJK.

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cobbadog
Posts: 610
Joined: Tue Oct 11, 2011 6:18 am
Location: beautiful Coopernook NSW. near Taree. NSW. Australia

Re: Cylinder head nuts

Post by cobbadog » Thu Sep 05, 2019 12:19 pm

Thanks for the reply ollek but all I was asking is what was so special about the nuts that a standard one would not work.
At the same time at NO stage did I say I was going to use the nuts nor was I doing a head replacement on a tractor so please dont be so rude in saying that I intended to do so. Then for you to say that is all I need to know is not true and is why I asked the question to learn more. ALLANJ has provided an answer which gives me and others reading this thread the "reason" why it is not recommended to use a standard thread. Thank you ALLANJ.
The reasons for asking questions on Forums is to learn. Your and db2d knowledge on the traqctors is highly commended but hwen we read a comment about you should not use a standard type nut with no explanation we want to know why that is so.

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