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Ford 8N Low Oil Pressure

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Oklahoma Alan

06-12-2006 16:38:32

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Does anybody have an idea why my oil pressure on my Ford 8N would suddenly go from 75 psi to 10 psi? I can't see any obvious external reasons for this to happen.

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dave guest

06-13-2006 20:36:29

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Re: Ford 8N Low Oil Pressure in reply to Oklahoma Alan, 06-12-2006 16:38:32

Maybe it was doped up with STP or heavy oil. 10W-40 is base 10 weight oil. Try straight 30 or even 40 weight if history of engine is unknown. Save drained oil if it is new. Nothing wasted.

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TheOldHokie

06-12-2006 18:57:47

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Re: Ford 8N Low Oil Pressure in reply to Oklahoma Alan, 06-12-2006 16:38:32

Hmmm.... Way too high to a worrisome low overnight. I'd suspect either a braindead gauge or a relief valve originally stuck close that's now stuck open. Both easy and cheap to check.

TOH

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souNdguy

06-12-2006 18:41:46

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Re: Ford 8N Low Oil Pressure in reply to Oklahoma Alan, 06-12-2006 16:38:32

75psi is just way too high... NAA run in the 50 psi range..

I think I'd get another oil pressure gauge and check it.. might just be a flaky gauge.

While 10 psi is an accaptable working pressure ( my 2n has 10-12 at hot idle ).. I always like to investigate drastic oil pressure changes... they usually involve money... hopefully the only money you will spend is 9$ for a sunpro gauge.. etc.

Soundguy

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FLAcharlie

06-12-2006 18:16:51

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Re: Ford 8N Low Oil Pressure in reply to Oklahoma Alan, 06-12-2006 16:38:32

75 sounds a little high.

Mine starts out like 50psi, but as it warms up it settles at about 26psi after a couple hours mowing.

Even 10 psi can be OK for these things. What oil you using ??

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Oklahoma Alan

06-12-2006 19:04:27

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Re: Ford 8N Low Oil Pressure in reply to FLAcharlie, 06-12-2006 18:16:51

Good ideas, I am using 10W-40 oil. I tried another gage same results. I don't know why it was 75 psi thats just what it was when I bought the tractor. Do I have control over what the oil pressure can be? As it warmed up it would drop to about 50 or 60 psi.

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Gregg E

06-12-2006 17:13:09

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Re: Ford 8N Low Oil Pressure in reply to Oklahoma Alan, 06-12-2006 16:38:32

As you will see from many a response, it could be many things,
First I would see if my oil pump pick up line fell off, second I would check out if my oil relief valve spring broke. there are a few to start with Gregg

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