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Harry Ferguson Tractors Discussion Forum
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Oil Pressure Drop

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yamin

12-15-2004 09:16:44




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Our TE20 just recently had a drop in oil pressure. It had been running at around 30 psi. Now, when you start it, it makes quite a noise in the valve train until the oil flows. It is then quiet until it warms up and then it starts to make quite a racket again - off and on though. Oil pressure fluctuates between 10 and 15 psi when this happens.

I run 10W30 - could this be the oil pump going? Should I run a heavier grade of oil?

I drained the oil and installed new oil (same viscosity)with no difference. I will check the oil filter later today.

Thanks, Peter

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Jerry/MT

12-15-2004 11:01:12




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 Re: Oil Pressure Drop in reply to yamin, 12-15-2004 09:16:44  
The oil you are using is not the problem. Does this tractor have a continental or a Standard engine? I wonder if you have a loose or cracked oil tube on the oil pickup to the pump. When the oil is cold, it's tending seal the hole or crack bcause the viscosity is high so it allows some oil to get to the bearings and valve train so the noise goes away. When it warms up and the viscosity is low, the pump starts sucking some air and the oil pressure fluctuates and there's a reduction in oil flow so the noise starts up again. You'll have to pull the pan and thoroughly check the oil pickup line.. Don't run it except for diagnostics til you figure this out. The racket you are hearing in the valve train is bad but your mains and rod bearings are probably getting aerated oil also and that's not good for lubrication. Let us know what you find.

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