Very High oil pressure

Axell

Member
Location
Scandinavia
Hi there

The needle in my oil pressure gauge immediatly flies to high. The gauge is a smiths with red green red scale.
When I got the tractor a couple of weeks ago it only had about three liters of engine oil. So perhaps a sign of lacking service for some time.
Could that have caused any issues in the oil system?


This post was edited by Axell on 12/19/2021 at 04:44 am.
 
(quoted from post at 07:01:47 12/19/21)
If it were me, I'd get another gauge with the pounds marked on it and compare the two, before I did anything.

You mean one of these?

https://www.silverfoxtractorspares.com/massey-ferguson-35-135-148-oil-pressure-elbow-gauge-11010-p.asp
 
(quoted from post at 13:30:35 12/19/21)
(quoted from post at 07:01:47 12/19/21)
If it were me, I'd get another gauge with the pounds marked on it and compare the two, before I did anything.

You mean one of these?

https://www.silverfoxtractorspares.com/massey-ferguson-35-135-148-oil-pressure-elbow-gauge-11010-p.asp

You linked an elbow fitting, not a gauge. J.Wondergem is recommending you get a different gauge that shows the actual pressure in pounds, or bars, as you chose. I expect your existing gauge is mechanical, the new gauge should be able to be connected to the existing tubing that supplies your current gauge. Here is an example of a gauge face that will show actual pressure readings.

mvphoto85980.jpg
 
(quoted from post at 13:31:58 12/19/21)
(quoted from post at 13:30:35 12/19/21)
(quoted from post at 07:01:47 12/19/21)
If it were me, I'd get another gauge with the pounds marked on it and compare the two, before I did anything.

You mean one of these?

https://www.silverfoxtractorspares.com/massey-ferguson-35-135-148-oil-pressure-elbow-gauge-11010-p.asp

You linked an elbow fitting, not a gauge. J.Wondergem is recommending you get a different gauge that shows the actual pressure in pounds, or bars, as you chose. I expect your existing gauge is mechanical, the new gauge should be able to be connected to the existing tubing that supplies your current gauge. Here is an example of a gauge face that will show actual pressure readings.

mvphoto85980.jpg

Wouldn't a pressure gauge with a lower "range" be better suited for these tractors that generally run with an average 20-30 pounds oil pressure? That would serve to make a fluctuation of oil pressure more obvious.
 

That is just intended as an example of a face showing actual readings. Yes, a lower max reading would be better. I would prefer a 60 psi gauge, that provides a bit of leeway if the pressure is running high. The best gauges use a large sweep area, like 270 degrees, on the face which gives more space between the reading points.
 

Clean oil filter and pressure relief valve thoroughly and reassemble exactly as in the manual diagram .
Most likely it is a gauge issue or a severely clogged oil line , however the filter housing is surprisingly complicated and can cause odd results if not put together or adjusted properly.
The relief valve is the bolt to one side of the top , this should have six to eight threads showing , if screwed down tight it will also cause high readings .
 
(quoted from post at 02:34:58 12/20/21)
Clean oil filter and pressure relief valve thoroughly and reassemble exactly as in the manual diagram .
Most likely it is a gauge issue or a severely clogged oil line , however the filter housing is surprisingly complicated and can cause odd results if not put together or adjusted properly.
The relief valve is the bolt to one side of the top , this should have six to eight threads showing , if screwed down tight it will also cause high readings .

Hey, this is a great thread for Ferguson beginners like ,,,,me,,!
What IS the "normal" oil pressure for a fresh rebuilt TO20 engine? I checked the gear specs in the oil pump per an article here and was all ok and engine has new rod and main bearings with clearances checked good. so what oil pressure should I expect?
As a side,,I am going to follow "Grits" procedure on modifying the oil filter system to the external location. I have modified an oil pickup screen from a SBC and welded it to fit the Ferguson oil pump tube. Wish me luck,,,,
 
What engine do you have?

The Z series Continental gas engines should be set at 20-30 PSI at 2000 RPM.

The Standard diesel sets at 60 PSI at 1400 RPM.

These are set with the engine AND the oil up to operating temperature. The engine will come up to temp quicker than the oil, especially on a cold day and just sitting there running, not working.

Keep in mind the relief valve will only lower pressure, it will not raise pressure on a worn engine. Something that often happens, someone will stretch the spring, shim the spring, or replace the spring with the wrong one in a attempt to raise pressure on a failing engine or oil pump. If that has been done, and not corrected, the relief valve is rendered pretty much useless.

Not familiar with all the engines available, but the Z gassers were notorious for having low oil pressure even when fresh. If yours is a Z, I would suspect a bad gauge.

You can get a loaner test gauge from the auto supply, test it with a known good gauge. If your gauge is bad, the replacement needs to match the expected pressure. If expecting 0 PSI, get a gauge that reads about 60, if expecting 60, get a gauge that reads around 80. Be careful choosing a gauge. Automotive gauges don't do well exposed to the elements. Get a tractor or marine gauge. And NEVER EVER use the crappy plastic line that may come with it!
 
My engine is a A3.152 perkins.

And this should be the correct link.

https://www.silverfoxtractorspares.com/massey-ferguson-tea-ted-tef-oil-pressure-gauge-white-face-60-psi-1578-p.asp

And that pressure relief valve. The only one I can find is the one for hydraulic pump.

This post was edited by Axell on 12/20/2021 at 11:09 am.
 
(quoted from post at 15:00:05 12/20/21) My engine is a A3.152 perkins.

And this should be the correct link.

https://www.silverfoxtractorspares.com/massey-ferguson-tea-ted-tef-oil-pressure-gauge-white-face-60-psi-1578-p.asp

And that pressure relief valve. The only one I can find is the one for hydraulic pump.

This post was edited by Axell on 12/20/2021 at 11:09 am.

A gauge like that will work, but you may want to find one that goes to 80 PSI, I see that one is out of stock.

Do you have the manual for the A3.152 gasoline engine? The Manual for the AG3.152 (gas) for a 135 I have, shows 30 to 60 PSI oil pressure at maximum engine speed (2225 to 2275 rpm) and normal operating temperature. The oil pressure relief valve of the AG3.152 is in the oil pump body.
Jim
 
(quoted from post at 15:57:17 12/20/21)
(quoted from post at 15:00:05 12/20/21) My engine is a A3.152 perkins.

And this should be the correct link.

https://www.silverfoxtractorspares.com/massey-ferguson-tea-ted-tef-oil-pressure-gauge-white-face-60-psi-1578-p.asp

And that pressure relief valve. The only one I can find is the one for hydraulic pump.

This post was edited by Axell on 12/20/2021 at 11:09 am.

A gauge like that will work, but you may want to find one that goes to 80 PSI, I see that one is out of stock.

Do you have the manual for the A3.152 gasoline engine? The Manual for the AG3.152 (gas) for a 135 I have, shows 30 to 60 PSI oil pressure at maximum engine speed (2225 to 2275 rpm) and normal operating temperature. The oil pressure relief valve of the AG3.152 is in the oil pump body.
Jim

Only have one for mf35 all models. But nothing with a pressure gauge.
 
I found this Perkins manual which you can download and save. It covers a group several of the Perkins engines including the A3.152 indirect injection engine which I believe yours is.

https://www.manualslib.com/manual/1101878/Perkins-3-152.html

On page 18, in the specifications, it shows the oil pressure should be 30PSI minimum at maximum engine speed and normal operating temperature. And the oil relief valve is in the oil pump body.

There are a lot of questions asked about many tractors and it is pretty hard to remember who has what tractor. I know you have posted info about your tractor before, but it may help if when you post a question like this if you include the model of the tractor, the engine info and fuel in the first post. It may reduce being asked or getting incorrect info. You said are located in Scandinavia, which can be another thing that can complicate giving the right info as we may not have access to parts catalogs for machines built outside of North America. Glad to try to help, just explaining why answers may seem of base at times.

This post was edited by Jim.ME on 12/21/2021 at 01:56 pm.
 
Most Auto dealers have a test master gauge see if you can use it
see what it reads I bet you have a bad sender
 

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