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Case Tractors Discussion Forum
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Case 900 no oil pressure

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TravisM

06-29-2005 20:31:56




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Just rebuilt a case 900 and now I have no oil presssure at all. I took the gauge off and had oil and that point while cranking over with no plugs in and put the gauge back on and had 25 lbs while cranking over, started it and had nothing, dont' know what to do next.




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mike's600

06-30-2005 17:53:56




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 Re: Case 900 no oil pressure in reply to TravisM, 06-29-2005 20:31:56  
There maybe a plug behind the Gov in the back of the hosing that may have been taken out when the block was cleaned. No plug , the oil just runs back to the pan. Will not build oil presure.



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L.Lamp

06-30-2005 00:10:26




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 Re: Case 900 no oil pressure in reply to TravisM, 06-29-2005 20:31:56  
I have SC's and DC's and I use a hand power unit like the ones that are used on a body shop port-a-power. I put a fitting in the pipe that feeds the oil filter and pump oil into the engine there to see if the pressure comes up and to check to see if there are any bearings that are gushing excessive amounts of oil. Fill the power unit with the same oil as you have in the crankcase. Have someone do the pumpimg while you shine a light through the hand holes in the side of the pan. Make sure you tightened the oil pump bolts down good also. The oil pump bypass valve may have stuck open from the increase in pressure if you used all new bearings. That should show up too when you pump oil into the engine. Keep everything clean and away from dirt! Good Luck!!

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AllanC

06-29-2005 22:02:09




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 Re: Case 900 no oil pressure in reply to TravisM, 06-29-2005 20:31:56  
No real good ideas come to mind 'cept oil pump drive slipping - key missing??



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