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Super C Oil Pressure

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BigTool

08-28-1999 12:44:52




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I have a '54 Super C, and while running it slowly loses oil pressure. After about 45 mins idling, it is down at the bottom of the white. Fast Idle makes it about 1/3 to maybe a bit below half up the gauge. I've checked the oil pump, replaced the gauge, etc. A friend said I should change the main bearings, but the Case dealer said it has nothing to do with oil pressure. Any suggestions?
If it is the main bearings, can they be replaced from underneath?
Thanks in advance!

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Ray

08-28-1999 19:21:24




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 Re: Super C Oil Pressure in reply to BigTool, 08-28-1999 12:44:52  
I just went through about the same thing with my A. After about the same amount of time my oil preasure would droup out to O psi. I'll tell the steps that I went through.
1.First I made sure my guage was good(I put a guage that I could see the psi.). 2.Next I pulled the oil pump off and it looked ok but I put it through a test. If you have some parts cleanne submurge only the oil pickup screan into the cleanner and put your finger over the outlet and spin the gear. As you spin the gear,look at the botton cover to see if the cleanner is comming from around it. What had happened to mine was the bottom cover was warped and the gasket was blown. Mine was warped so bad it wouldn't even pick up the cleanner,so I had to submurge the whole pump to prime it and after I did it just all sprayed out the sides. So what was happening was it would have oil preasute when the oil was cold,but when it got hot all the oil was going around the cover. 3.To fix it,all I did was get a sheet of sandpaper and a flat surface and reface it. If it's bad it might take awhile. After I got it refaced and reinstalled,now cold it has 40 psi and after it gets hot 18psi. So I'm happy with the outcome.
Hope this will help you,let me know if it does.

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big fred

08-28-1999 17:58:27




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 Re: Super C Oil Pressure in reply to BigTool, 08-28-1999 12:44:52  
According to my I&T manual, the main bearing are replaceable from below. The IH manual for my B agrees, and the engines are almost the same. Check the clearance on the mains, should be .001 to .0035 for the C. If they are within spec, your next best bet is the pump, followed by the camshaft bearings.



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The Red

08-28-1999 13:21:15




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 Re: Super C Oil Pressure in reply to BigTool, 08-28-1999 12:44:52  
That pump should be similar to the H. It sounds like you have wear inside the pump itself on the gears and shaft. I had a similar problem on Corey's 51 H. When I swapped pumps the oil pressure improved a bunch.



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