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Case Tractors Discussion Forum
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VAC Oil Pressure

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Dave

07-03-2004 13:53:32




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Factory says oil pump "should" supply a constant pressure between 12-20 PSI.
I have removed and cleaned all parts in oil pan, with exception of rebuilding pump. I have good lubrication at pushrods and rocker arms, but only 4 PSI under load on new gauge. Any ideas.




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mj

07-04-2004 22:33:23




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 Re: VAC Oil Pressure in reply to Dave, 07-03-2004 13:53:32  
third party image

Pull the oil pan, stretch the oil pump bypass spring until it relaxes to a free length of 2 inches (Case calls for 1 and 15/16 on a new one), reassemble and check oil pressure. Shim or re-set spring again if needed. More on the link...click an image to enlarge.

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Jerry

07-03-2004 20:27:23




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 Re: VAC Oil Pressure in reply to Dave, 07-03-2004 13:53:32  
Dave,
I had the same problem you are having . I found a 0- 30 gauge and the problem was taken care of. I installed my master gauge to make sure I was correct.I wqas sent a 0-80 and I was looking for a movement on the gauge. Tried a 0-60 and there was some , the 0-30 gauge was correct with my master gauge.
Oh ,yes found it on ebay, John Saeli was tring to get them made but ran into a snag
Jerry

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Dave

07-03-2004 17:29:13




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 Re: VAC Oil Pressure in reply to Dave, 07-03-2004 13:53:32  
Joe,
You seem to be the man to talk to. I installed a 0-60 PSI rated gauge that is designed for tractors. I bled air out of tube that attaches to new gauge. As I said, I have 4 PSI at what I'm guessing is about 1500 RPM.



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Joe (Wa)

07-03-2004 18:40:19




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 Re: Re: VAC Oil Pressure in reply to Dave, 07-03-2004 17:29:13  
Dave, bourdon tube gauges read most accurately in mid-range. I would check the pressure with a 0-30 psi gauge. I don't know that your gauge is not reading correctly but it is the first thing to check before getting into the engine. 4 psi at 1500 rpm is a problem.

Joe



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Joe (Wa)

07-03-2004 14:18:26




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 Re: VAC Oil Pressure in reply to Dave, 07-03-2004 13:53:32  
12-20 psi is @ full rated rpm and at engine operating temp.

The oil gauge pickup is on the oil gallery, reading pump output pressure. 4 psi here is not going to get sufficent oil to the top deck. Are you using a 0-30 psi gauge or one of those after market 0-60 psi gauges?

Joe



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