Question about Harley Davidson Motorcycles
First off, if you are going by the idiot light, it COULD be a bad sending unit.
Either replace with a new one and check again, or hook up an oil pressure gauge (At 2000 RPM you should have 30-38lbs) to get a more accurate reading:
IF is is still ACTUALLY low, pull the relief valve spring and make sure its clean and nothing it blocking it from seating correctly.
A cracked cam plate could also cause a loss of oil pressure.
Finally, make sure that the oil line fron the oil tank to the pump (feed line) isn't plugged.
Posted on Dec 28, 2013
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Posted on Jan 02, 2017
What is happening is the oil is thinning out from the heat, and although is still supplying lubrication, it is too thin to register much oil pressure on a gauge, if any at all. What are you using for oil? Weight and brand? I'd recommend Castrol 20w-50 dino oil if you want to see more pressure on the gauge. I have been through what you are experiencing, and this is what I found out. Harley oil was always disappointed in the pressure department, but there were no worries because, the Harley engines were low pressure, high volume designs at the time, now they are high volume and high pressure, at least until the oils heats up and thins out, the pressure will drop, but the volume will stay where it should, insuring proper lubrication. I would listen for the lifters and valves to be clacking and clicking, if they are not, I would not worry. I could go on forever but I hope I have conveyed that you are probably OK. I would change the oil more often in the hot weather, especially if you do a lot of miles in the heat.
Posted on Jun 27, 2010
SOURCE: 2004 ultra classic electra glide
Most likely problem is a badly fitted seal/gasket this can cause the oilways to be blocked, take it back and get the technician to check it.This is an easy thing to do, because of the fine tolerances in the oil pump. A motor rebuild is a real pain and I'm sure the shop would rather not pay for a new motor.
Posted on Dec 17, 2011
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