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1940 H High Oil Pressure

C

cleddy

Member
My Grandpa's "H" has been stored in basically the same shed since 1970 or earlier with just occasional use. A few years ago I changed the oil(first time ever) and had trouble with the pressure being so much it blew the gasket(comes with filter) out on the filter housing. Could not see any thing wrong with blockage in the filter housing-bottom and tractor seems to run fine with no smoke. To solve the problem then I made a gasket from a sheet of rubber that could not blow out and tightened the filter housing tight.
I got the "H" running again now and it basically started right up and runs fine with fresh gas but the oil pressure gage almost goes to the high peg. Good oil pressure is usally a good thing but this has me concerned. What am I missing and what to look for to correct a problem? Hardly any old engine that hasn't been rebuilt for years has that high of oil pressure.
CLeddy
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Sounds to me like you have a oring/gasket on top of one that is pushed in the housing cannister. Take the oil filter apart and dig out the old o ring in the groove in the filter base.
 

Oil pressure is NOT too high. You just need to make sure ALL of the old gasket is gone, and then make sure the NEW gasket sets down into the groove. Also need to make sure the oil filter canister sets SQUARELY on the new gasket and hold it in place while tightening the bolt.
 
The typical Farmall runs very high oil pressure, typically 75 PSI or more. The prior posts are correct. The Square section "Oring" is in the groove. it is a deep groove. The old ring will be nearly as hard as steel. Using a sacrificial old screw driver sharpened to make a tiny sharp chisel will help. Jim
 
I would agree, clean the quad ring groove out real well, take a pick in there and poke till you are down to cast iron.
 
It makes me nervous when mine isn't nearly all the way over on the guage. After about an hour of working if I idle it down I can get it to drop to the middle. This just the way they are.
 
The oil filter on an H is a bypass style. There is no oil pressure inside the filter housing. Oil enters the filter through a small hole in the filter canister bolt. Once the oil passes through the filter it drains back into the oil pan through a much larger hole.
 
Yup. Nothing wrong with the tractor.

You just have a petrified old oil filter gasket in the groove at the base of the housing. They will get so hard that they actually feel like steel when you pick at them with the screwdriver.

If your new gasket does not fit down in the groove below the surface by at least 1/16", get that old gasket out of there.
 
To make a oil ring remover, use a 10 penny nail or similar and flatten the tip, and then take it to the grinder and you can make it as sharp as u want, and the angle u want.
 
Thanks for all the replies. Sounds like an old gasket is the problem since the way it ended up with the rubber gasket the canister/cover is at least a 1/16" above the base. I had no idea when the oil was changed before(More than 20 years) but it had an original International Filter in it. That does not mean much since and old time International Dealer is in the area and they still have parts on the shelf.Cleddy
 
(quoted from post at 13:36:02 10/22/14) To make a oil ring remover, use a 10 penny nail or similar and flatten the tip, and then take it to the grinder and you can make it as sharp as u want, and the angle u want.
Click to expand...

I grind old hacksaw blades to various point shapes for scrapers, hooks, etc. very handy to keep around the shop for many uses.

Alan
 
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