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Oil pressure problem

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Tom Hogan

06-10-2003 17:58:15




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I was running my TEA 20 the other day and at start up had 40lbs on the oil pressure gauge usually as it warms up it drops off to 20. This time ( i was running also a mower deck) it dropped down to almost nothing... I stopped the tractor check the oil which was fine and put it away for the day... What could cause the oil pressure to plummet like that?




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Barry Reid, Stirling Onta

06-12-2003 04:41:55




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 Re: oil pressure problem in reply to Tom Hogan, 06-10-2003 17:58:15  
Morning Fellas Well once again I have learned something, maybe my oil pressure gauge is ok after all. I have learned so much by just reading the resposes to differnet questions posted here. Thanks again



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Barry Reid, Stirling, Ont

06-11-2003 04:37:49




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 Re: oil pressure problem in reply to Tom Hogan, 06-10-2003 17:58:15  
Morning Tom

I had the same problem with my TEA-20. I had very little oil pressure, so I changed the oil and filter the day I bought it. I dont think the older farmer I bought it from ever changed the oil. it had what looked like the original paper oil filter still in it. Once the oil and filter were changed I went from 10 lbs pressure to almost 60 lbs. Like Ray says I dont think its was really that much pressure, But once the tractor was warm it dropped off to 20 lbs.I have run the tractor all day at 20 lbs pressure and noticed no problems. I havent changed the gauge yet. The tractor works great. Just my 2 cents worth, Barry

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Ray,IN

06-10-2003 20:26:17




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 Re: oil pressure problem in reply to Tom Hogan, 06-10-2003 17:58:15  
To begin with, the original H. Ferguson oil pump relief valve is set to a maximum of 30psi. I suspect your gauge is faulty. As long as any pressure at all is registering on the gauge and the valve tappets are not rattling you should be OK. A good friend who formerly was a mechanic at a H. Ferguson dealership in the early 1950's told me that as long as the engine received 5psi of oil pressure it was fine. Oil also cools an engine, and if excessive pressure causes the oil to flow so fast it cannot absorb heat certain parts will become overheated during heavy work loading. I suggest attaching a mechanics test pressure gauge to determine actual oil pressure first.

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Ray,IN

06-11-2003 17:44:46




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 Re: Re: oil pressure problem in reply to Ray,IN, 06-10-2003 20:26:17  
That's what I get for inattention to detail. I am corrected my friends. It's commonly said in Europe that Americans are self-centered and I just fell into that trap.



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Jim W

06-11-2003 06:33:36




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 Re: Re: oil pressure problem in reply to Ray,IN, 06-10-2003 20:26:17  
Ray, remember this is not a Continental engine. I believe on the Standard engines the relief valve was set at about 70 pounds. I might be a bit off but anyway it's way higher than the numbers you're quoting.
I am seeing ~80 at startup, 30 under light use, and 20 under heavy use on my running TEA. On my other, not running yet TEA with a rebuilt motor, I spun the oil pump shaft with a drill and got 70 before the relief valve opened. On a third TEA I'm working on I am getting 20 pounds just spinning the engine with the starter motor, but I think that's low. I should qualify right away that all of these have old gauges so the numbers could be somewhat off, and I need to take your advice and get a known good gauge myself.
Back to the problem here though, if you're really lucky it could even be that the gauge suddenly died, and since that's the cheapest thing to start with I would certainly begin there.
First though for some quick comfort (or discomfort), you could loosen the banjo fitting for the oil gauge line at the side of the block, turn over the engine, and see if oil really squirts out, which will indicate that you have some pressure instead of none.
Regards,
Jim W.

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john(UK)

06-11-2003 15:39:17




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 Re: Re: Re: oil pressure problem in reply to Jim W, 06-11-2003 06:33:36  
Yeah, what Jim says is correct, the lower pressures quoted to you are for the Continental engine, the TEA which has a Standard Motors engine should run at between 40 and 60 psi. suggest you change oil and filter. oil change interval is 240 hours, filter change is every 480 hours



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