Super H Oil Pressure

Global Warmer · Jun 12, 2012

The oil pressure on my Super is only at about 20 at full throttle
when cold. Where do I begin on improving that? I don"t know if
it matters but I"m running detergent free oil. Any suggestions
would be great!

Bob M · Jun 12, 2012

A good SH engine should carry 55 - 60+ psi cold. Most likely the problem's a worn or warped oil pump cover. But it could also be worn crank/camshaft bearings. (It's NOT caused by the non-detergent oil.)

I recommend this: Drop the pan and remove the cover from the pump. If you find wear grooves from the pump gears, if the cover is not absolutely flat or if the gasket is blown out you've found the problem. But if the oil pump is OK you'll need to get inside the engine to service the bearings.

If you determine the problem is the pump cover, grooves or a minor warp can be removed by carefully working the cover on abrasive cloth laid on an absolutely flat surface (machine table or sheet of plate glass).

While the pump is apart check the pressure relief valve to make sure it's not stuck partially open. Use a NEW gasket when replacing the cover (be careful - it's very thin and tears easily!). Then torque the capscrews evenly and equally so you don't warp the cover/pump body.

Tip: Switch to 15W40 oil. It will give better with oil pressure when hot, and it won't promote sludge accumulation as does non-detergent oil.

Dean Olson · Jun 13, 2012

I have a 53 SH that I rebuilt the engine and a 54 SH that PO rebuilt the engine. 53 SH will hold about 65 at idle and 75psi at WOT. The 54SH holds 55psi at idle and 70 at WOT.

My Farmall 200 had 20psi at idle and would not come up much at WOT. I pulled the pan and removed about 2" of sludge. Pump gasket had blown out the side. Cleaned it all up and repaired pump and still didn't have good pressure. Upon further investigation I found that the hole in the side of the oil filter housing bolt was plugged. That fixed the problem and I now have good pressure.

Grandfather taught me to run heavier oils in worn engines. Try some 20w-50 and see what that does for you.

That's the easy stuff. If none of that helps it's time to rebuild the engine.

SadFarmall · Jun 13, 2012

At the risk of sounding foolish, have you checked that the gauge is operating correctly? It would be unfortunate to dismantle parts of the tractor, only to find the gauge was defective! It's an easy thing to check and may save you some work. Otherwise, as has already been suggested.
SadFarmall

Global Warmer · Jun 13, 2012

I have not checked the gauge. What is the best way of doing that?

mkirsch · Jun 13, 2012

The thread on the back of the gauge is often the same as the thread in this type of blow gun:

If you have an air compressor with a regulator on it, set it for some PSI, say 40, screw the gauge on, and blow. If the gauge reads close to the air compressor regulator setting, it's fine.

Global Warmer · Jun 13, 2012

Well I checked the gauge and it is fine. I am now trying to drop the pan. I have taken all the bolts out and it won"t budge. Am i missing something? Or what do I do next?

rustyfarmall · Jun 13, 2012

(quoted from post at 13:26:24 06/13/12) Well I checked the gauge and it is fine. I am now trying to drop the pan. I have taken all the bolts out and it won"t budge. Am i missing something? Or what do I do next?

First, make absolutely certain that ALL the bolts are out, including those that kind of like to hide in the crud at the rear. If indeed all of the bolts are out, then the only thing holding it on is the glue on the gasket. Give it a good thumping with your hand, or insert a thin bladed putty knife in between the pan and engine block.

Global Warmer · Jun 13, 2012

Got the pan off but not sure what to do next. Do i take the whole assembly off? If so then what am I to do?
Thank you for all the help so far!!!

Global Warmer · Jun 13, 2012

Heres a picture

JRSutton · Jun 13, 2012

great idea

LarryM · Jun 13, 2012

There is a plunger with a spring in the pump. Check the spring.

rustyfarmall · Jun 14, 2012

(quoted from post at 17:29:27 06/13/12) Got the pan off but not sure what to do next. Do i take the whole assembly off? If so then what am I to do?
Thank you for all the help so far!!!

Yes, remove the entire oil pump assembly. There is only one bolt holding it in, but after removing that bolt you will need to rotate the assy back and forth while pulling down. Usually they come out fairly easy, so be careful to not drop it. Once you have it out, take it to your work bench and then remove those 4 bolts that hold that bottom cover on. There is a heavy spring under the cover that will push up against the cover as you remove the bolts, so you will need to loosen the bolts evenly as you go. By the time the 4 bolts are loose, the pressure will be off the spring, so no, it will not fly off. Once the cover is off, you will see what needs to be done.

I like to hold the oil pump assembly upside down in the bench vise. that way those two gears inside will stay put and not fall out.

Super H Oil Pressure

Global Warmer

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Bob M

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Dean Olson

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SadFarmall

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Global Warmer

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mkirsch

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Global Warmer

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rustyfarmall

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Global Warmer

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Global Warmer

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JRSutton

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LarryM

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rustyfarmall

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