High Oil Pressure

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seabeelt
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Tractors Owned: 1948 Farmall Cub
1953 Farmall Cub
Location: Tiverton, RI

High Oil Pressure

Postby seabeelt » Wed Feb 01, 2017 10:12 am

Hello folks. Its been a while since my last post. Installing the mag 180 out LOL. My newest issue if you will is high oil pressure. For a while it looked like the oil gauge was not working as the needle did not move at all. Since the tractor had been working fine, I assumed it was just the gauge. Recently, I noticed that the gauge seems to work but after starting the engine and it runs for a few minutes the gauge goes up through the normal range and pegs on the other side. (High reading).
I suppose I should swap the gauge on the other tractor to verify if the pressure is truly high or its just a defective gauge.
My question is this: If the regulator valve needs cleaning and or repair. How do I access it. I'm truly hoping I don't have to split the tractor to do this. thoughts from the brain trust???
Many thanks as always
Michael

tst
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Re: High Oil Pressure

Postby tst » Wed Feb 01, 2017 10:21 am

the regulator is below the mag, a 1" hex nut, pull the nut off, remove the spring, the plunger can be sticky to get out, carb clean around it to was off the varnish and old oil, a magnet, or something to jam in side it will pull it out, easy to get to
Tim

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Urbish
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Re: High Oil Pressure

Postby Urbish » Wed Feb 01, 2017 10:31 am

tst has you covered. But if that doesn't work, I recommend low sodium fuel and frequent exercise. :lol:

seabeelt
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Joined: Tue Aug 31, 2010 10:45 am
Zip Code: 02878
Tractors Owned: 1948 Farmall Cub
1953 Farmall Cub
Location: Tiverton, RI

Re: High Oil Pressure

Postby seabeelt » Wed Feb 01, 2017 10:32 am

WOW! Thanks so much for the quick reply. Ill give it a shot this weekend. Many thanks

Eugene
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Re: High Oil Pressure

Postby Eugene » Wed Feb 01, 2017 11:27 am

Simply remove the hex head nut and the spring, reinstall the nut. Start the tractor and let run for 30 seconds. If the valve is not stuck in the bore it will be resting against the hex head nut.

Valve didn't move. MidMo has a post on this site with a home made device for removing the valve. It's basically a wooden dowel and a wedge.

Edit: viewtopic.php?f=1&t=57313&hilit=oil+pressure#p472583

Picture of the pressure regulating valve removal tool.
I have an excuse. CRS.

outdoors4evr
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Re: High Oil Pressure

Postby outdoors4evr » Wed Feb 01, 2017 1:03 pm

I guess I now have a question for the experts.
I know most gauges on a cub don't have numbers on them, but what would be the top of the gauge? 50psi ???
What oil pressure is considered "Too High"???? (that would warrant looking into an issue)
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller

Eugene
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Re: High Oil Pressure

Postby Eugene » Wed Feb 01, 2017 1:07 pm

35 psi, +/-, would be high oil pressure, that's the advertised pressure for the control valve. That would be near the high end of a Cub gauge without numbers.
I have an excuse. CRS.

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Glen
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Re: High Oil Pressure

Postby Glen » Wed Feb 01, 2017 8:30 pm

Hi,
outdoors4evr
Here are pics at TM Tractor of oil gauges. The first is the style of gauge they started using in about 1956, it has numbers. There are others there you can look at, I would put on a gauge that works, so you know if it has oil pressure.

seabeelt
The page from the parts book showing the oil pressure regulator is below. It is numbers 1, 2, 3, and 4 on the right side of the pic.
You might have to remove the bolt holding the front end to the engine to get the cap off. :)

http://www.tmtractor.com/new/en/3291fp.htm

http://www.tmtractor.com/new/en/5732fp.htm

http://www.tmtractor.com/new/en/492fp.htm

http://www.farmallcub.info/manuals/cub_ ... 012-19.jpg

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Sailor
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Re: High Oil Pressure

Postby Sailor » Fri Feb 03, 2017 12:54 am

How much oil will drain out when you pull the oil pressure regulator?
1948 Cub
Cub-22 Mower
Cub-54 Leveling & Grading Blade
Cub-144 Cultivator
Cub-189 Moldboard Plow (direct-Connected, One Bottom, Two-way)
Woods 59 Mower
Image

Eugene
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Re: High Oil Pressure

Postby Eugene » Fri Feb 03, 2017 1:23 am

Sailor wrote:How much oil will drain out when you pull the oil pressure regulator?
Little to none. Closer to none, assuming the engine is not running.
I have an excuse. CRS.

outdoors4evr
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Re: High Oil Pressure

Postby outdoors4evr » Fri Feb 03, 2017 7:23 am

Does "high oil pressure" mean that the regulator is blocking the oil passage to the crank?

I have recently added an oil pressure gauge to my 184 and it is well above 40psi when running at wide open throttle. It does drop down at lower RPM's. I understand that there are going to be differences with the cub due to the RPM differences. I just don't want to harm the engine. Since the 184 only had an idiot light for low oil pressure, I had no way to know if high oil pressure could be an issue.

Do I need to tear my oil pressure regulator apart too?
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller

Gary Dotson
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Re: High Oil Pressure

Postby Gary Dotson » Fri Feb 03, 2017 8:13 am

No, the regulator will simply by-pass oil back to the pan, when it's pre-set pressure is reached. Excess pressure will not harm anything, as long as it's not extreme. The biggest issue is holding the filter gasket in place. That said, it couldn't hurt to pull the regulator and make sure it's not sticking.

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Glen
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Re: High Oil Pressure

Postby Glen » Fri Feb 03, 2017 10:07 pm

Hi,
Here is the oil gauge they used on the newer Cubs below, it says it was in the 1975 parts book.
They don't work too well on an older Cub, the hand doesn't go up far on the numbers.
I'm not sure if they raised the pressure on the newer Cubs. :)

http://www.tmtractor.com/new/en/4876fp.htm

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Sailor
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Ser.# 16812
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Location: KY, Morgantown

Re: High Oil Pressure

Postby Sailor » Sun Feb 05, 2017 12:53 am

Eugene wrote:
Sailor wrote:How much oil will drain out when you pull the oil pressure regulator?
Little to none. Closer to none, assuming the engine is not running.


Thanks.
1948 Cub
Cub-22 Mower
Cub-54 Leveling & Grading Blade
Cub-144 Cultivator
Cub-189 Moldboard Plow (direct-Connected, One Bottom, Two-way)
Woods 59 Mower
Image

seabeelt
5+ Years
5+ Years
Posts: 73
Joined: Tue Aug 31, 2010 10:45 am
Zip Code: 02878
Tractors Owned: 1948 Farmall Cub
1953 Farmall Cub
Location: Tiverton, RI

Re: High Oil Pressure

Postby seabeelt » Sun Feb 05, 2017 2:08 am

Well, I pulled the pressure regulator. It was fine. It moved back and forth freely. Turned out it was the gauge. Swapped the gauge from the other tractor and it was fine. Now on to other issues. The battery is not getting a charging voltage from the generator system. Going to be a PIA since the regulator is on top of the generator and everything is tucked way up high under the gas tank. Always something


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