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Tractor Talk Discussion Forum

5.9 Cummins Oil Pressure

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Mike Tessman

02-15-2007 15:30:51




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Nephew has a White 120 that is losing oil pressure. At cold start, has 60 psi. When engine oil is hot, it has 10 #'s @ 2000 rpm. Drops to nothing at idle. Engine has 2800 hrs and burns no oil when loaded down. Any ideas what might be wrong ? Oil pump or something else? Thanks Mike




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george pickering

02-15-2007 19:03:17




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 Re: 5.9 Cummins Oil Pressure in reply to Mike Tessman, 02-15-2007 15:30:51  
CUMMINS HAD APROBLEM WITH SOM OF THE EARLIER 5.9s THEY HAD PLASITC GEARS IN THE OIL PUMP AND THEY WOULD GET WORE I THINK THEY WENT TOO STEAL GEARS I HAD 2 P/U THAT HAD THE SAME PROBLEM



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Cumminalong

02-15-2007 17:17:56




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 Re: 5.9 Cummins Oil Pressure in reply to Mike Tessman, 02-15-2007 15:30:51  
A couple ways u can loose oil pressure is main bearings, oil pump, or one that not a lot of people think of but not always the problem. Is the brand of oil filter. Not always the case but sometimes. Wix really aint the best for oil pressure issues.

Tyler



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NC Wayne

02-15-2007 16:33:32




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 Re: 5.9 Cummins Oil Pressure in reply to Mike Tessman, 02-15-2007 15:30:51  
I had a brand new 4 cylinder B series, bought straight from Cummins, that never ran over 50psi cold. When hot, at an idle (1250 RPM in this application, an air compressor unit), it maintained around 10. It ran for several years like before my customer traded in the machine the unit sat on for a newer model. I routinely deal with the guys that now have it and they've never said anything about any problems with it in the time they've had it. If yours is showing zero though I'd first check the guage and make sure it's not lying, then if it's not you might try running a little heavier weight oil and see if that makes a difference, and go from there based on those two things.

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