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Case Tractors Discussion Forum
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Case SC oil pressure

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John McMillian

04-24-2004 05:44:06




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My 1951 Case SC runs about 15-20 pounds of oil pressure normally. Sometimes it drops to 10-15 when really warmed up. Is this OK? What is normal?




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Scott KY

04-24-2004 18:16:46




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 Re: Case SC oil pressure in reply to John McMillian, 04-24-2004 05:44:06  
John,
The oil pressure on my SC runs about 35 psi drops only to 30 when warm. I really don't know what is acceptable on those tractors.



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todd hamilton

04-24-2004 06:19:30




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 Re: Case SC oil pressure in reply to John McMillian, 04-24-2004 05:44:06  
These old Case engines were designed to run on straight 30 weight oil in normal conditions. If your engine has wear like mine, consider a heavier multi-viscosity oil. I use Pennzoil 15W-40 heavy duty rated for diesel and gas (available at Tractor Supply Store). It will help your oil pressure (20 lbs normal) and valve blow-by (breather smoke). Be cautious, however, of putting this detergant oil in your engine if your think you have a lot of sludge. You might want to pull the pan and clean the bottom out of it and/or flush the engine by the method of your choice. My engine runs well but needs to be overhauled. However, for light use on this tractor I can buy a lot of oil for the cost of rebuilding the engine. I also drained my transmission and replaced with 85W-140 gear oil with very good results. Consider getting a set of reprint service and operator manuals from Gensales for your tractor. The cost will be about $75.00 but they will pay for themselves many times over if you plan on keeping your SC for a long period of time.

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Dave

04-24-2004 06:04:47




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 Re: Case SC oil pressure in reply to John McMillian, 04-24-2004 05:44:06  
John,

That sounds about right, 15-20. depending on what oil you use would make a difference on oil pressure when hot as opposed to cold.

The 10-15 would be ok also. I really never checked the numbers on my gauge, just made sure that the needle was in the middle. There are other guys with way more experience in this area on this site, just sit tight and I am sure they will offer there advice.

Dave

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L.Lamp

04-24-2004 19:00:33




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 Re: Re: Case SC oil pressure in reply to Dave, 04-24-2004 06:04:47  
I have an SC book that says normal oil pressure is 25psi. I have a rebuilt '54 that runs 25psi with 5w30 or 10w40 at operating temperatures of 180 degrees. I think that is low but that is the way they made them and its 50+ years later, and they are still running!



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todd hamilton

04-25-2004 07:18:17




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 Re: Re: Re: Case SC oil pressure in reply to L.Lamp, 04-24-2004 19:00:33  
You will see SCs dripping gas from the flange on the gas tank and dripping transmission oil from the axle seals, but you never see one dripping engine oil from the main bearings!:^)



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