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Harry Ferguson Tractors Discussion Forum
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1951 TEA20 oil pressure gauge reading

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Patrick Wa

08-10-2004 14:41:20




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When I begin running my tractor the oil pressure gauge reads fine. The longer you run the tractor the lower it goes- down to almost nothing. The person that gave me the tractor said it has done that for years. Tractor dealership checked and said dont worry about it.Any ideas why it would do this?
Thanks




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Stan

08-15-2004 17:00:44




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 Re: 1951 TEA20 oil pressure gauge reading in reply to Patrick Wa, 08-10-2004 14:41:20  
Patrick,
Thanks so much for asking this question. Mine does the same thing and the guys at the local antique tractor shop said not to worry about it. I'll check the suggestions from John (UK) now though and see if everything really is fine.
Stan



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Barry from Stirling

08-13-2004 04:46:39




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 Re: 1951 TEA20 oil pressure gauge reading in reply to Patrick Wa, 08-10-2004 14:41:20  
Morning Patrick
I own a 1952 TEA-2085 and when she starts up the oil pressure shows 68 lbs psi. After about 1 hour or so of running the pressure drops to between 10 and 15 lbs psi. I thought that I had major problems. When I posted about this prob lem way back when, I got a lot of response saying that it was normal for the pressure to do this. So I think your tractor is running ok. Enjoy your Fergy

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Rusty - OH

08-11-2004 18:45:44




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 Re: 1951 TEA20 oil pressure gauge reading in reply to Patrick Wa, 08-10-2004 14:41:20  
Patrick,

The Ferguson shop manual gives 20 - 30 PSI at 2200rpm and 15 PSI at idle speed. The oil pump relief valve will keep it from going much higher. Sounds like you've got wear issues, just depends what your doing with it. If you have an original gauge without numbers, try hooking one up to get an exact reading.Good luck !



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John (UK)

08-12-2004 11:41:26




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 Re: 1951 TEA20 oil pressure gauge reading in reply to Rusty - OH, 08-11-2004 18:45:44  
Hey Rusty, You are looking at the wrong engine you are looking at a Continental Z120 this tractor uses a Standard Motors Unit. See my earlier posting for the specs.



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John (UK)

08-11-2004 13:09:48




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 Re: 1951 TEA20 oil pressure gauge reading in reply to Patrick Wa, 08-10-2004 14:41:20  
The oil pressure on a good engine should be 40 - 60 psi at anything over half throttle. The oil should be 20W/50 unless you are in a very cold climate then you should change to a slightly lower grade. Have you changed the oil filter, that can affect the oil pressure reading and there is an adjustment on the top side of the oil filter, try screwing in in a couple of turns to see if it puts the pressure up, if that doesnt work Have a look at the filter in the oil pan (the oval plate on the right side of the oil pan)make sure its clean. If that fails you could drop the oil pan and check the bearings, if they are down to the copper backing they need replacing if the C/Shaft is worn it needs a regrind. If it just needs bearings I would change the oil pump Rotor too, they are available from Sparex Part number S61996, it should also be available from this site too (top left of this page and click on H.Ferguson)Any good tractor dealer should be able to get this for you. You can get bearings too and gaskets. If you have any problems post again.

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Pat --Wa

08-11-2004 13:19:41




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 Re: 1951 TEA20 oil pressure gauge reading in reply to John (UK), 08-11-2004 13:09:48  
Thanks for the info
Pat



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Mutton Man

08-10-2004 15:50:03




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 Re: 1951 TEA20 oil pressure gauge reading in reply to Patrick Wa, 08-10-2004 14:41:20  
I'm new on tractors, but I've been a mechanic for several years. It sounds like you have some bearing wear. I've had engines run like that for years. You might try a heavier oil. That should help the pressure. If you use heavier oil just be sure to let the pressure come up before raising the RPM very much.



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richard

08-14-2004 15:44:07




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 Re: 1951 TEA20 oil pressure gauge reading in reply to Mutton Man, 08-10-2004 15:50:03  
Its old and worn, mine has done the same for years,dont try to up the pressure by adjusting the release valve,you will starve the engine of flow.Best to carry on and bother non!



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George Holmes

08-17-2004 20:04:35




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 Re: 1951 TEA20 oil pressure gauge reading in reply to richard, 08-14-2004 15:44:07  
Guys, blame it on my youth, but I don't understand how increased release valve pressure can starve the engine. It would seem doing so would increase the pressure necessary to bypass the normal oil channel, rather than the opposite. Can anyone clear this up?

Thanks



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