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Oil Pressure on John Deere LA.

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AWB

03-22-2002 05:02:03




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Started up my LA after a complete rebuild. The oil pressure gauge which is new reads off the high end of the scale. Does this hurt anything?




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Larry W.

03-23-2002 07:21:20




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 Re: Oil Pressure on John Deere LA. in reply to AWB, 03-22-2002 05:02:03  
When I first start mine, it almost pegs the gauge, then after the engine is good and warm, it drops off considerably. If you have the original gauge, it is set about the range of 12 to 25 as normal. I have been running mine for a long time this way. I figured if I adjusted the pressure down, it would be too low at normal operating temp. Since these have no oil filter, I think this is normal for the LA.

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gil

03-22-2002 08:38:46




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 Re: Oil Pressure on John Deere LA. in reply to AWB, 03-22-2002 05:02:03  
AWB. Obviously, either the gauge is wrong, or the pressure is too high. I'd suggest that you start by trying another pressure gauge that reads in pounds pressure. My book says that the engine should carry 20 - 25 pounds. It doesn't say, but I'd assume that is at operating RPM. If the pressure is still too high, oil pressure adjustment is made by inserting or removing washers (in your case removing) in the "sleeve" which is inside of the nut forward of the mag and just in from the oil fill/breather. There is a plunger at the bottom, then a spring, then washer or washers that increase the pressure necessary to raise the plunger. In your case, after a rebuild, with bearings tighter, possibly less washers will be necessary to maintain the oil pressure. It is also possible that the plunger was not removed at the time of the rebuild and it is sticking. Usually a magnent will pull the plunger up and out for inspection. gil

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