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Thread Tools | Display Modes |
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#1
04-25-2015, 08:20 PM
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Magnum 20 oil light
I've got a 2072 with the Kohler M20 and this winter while snow blowing the oil light came on. I stopped, checked the oil and it was fine. Today I changed the oil (from 5W30 back to SAE 30) the filter and the pressure sensor. The light still stays on all the time. There's plenty of oil and it's clean. I even went so far as to blow some compressed air into the port for the sensor in case there was a blockage. Should I be worried about this or just disconnect the light and check the oil manually?
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#2
04-25-2015, 08:26 PM
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I'd put a pressure gauge in the place where the low pressure switch is and see what is going on, one of 2 things the warning pressure switch is bad or you have a low pressure problem.
__________________
2264 with 54 GT deck 1641 AKA Black Jack with a 402-E Haban Sickle bar mower JD317 dump truck BX2670 with FEL
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#4
04-25-2015, 11:44 PM
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it could also have a short to ground turning the light on. as Sam mentioned get a mechanical gauge and install it to see what the actual oil pressure is. or I suppose you could keep running it. if its ok nothing will happen. if something is wrong then the engine will fail and you'll know to stop running it
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#5
04-25-2015, 11:48 PM
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Quote:
I'm 3 one in line on this, but screw a mechanical gauge in and see what it reads. If there is no oil pressure, don't run the engine anymore.
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#6
04-26-2015, 09:07 AM
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So let's assume the pressure is low. If there are no leaks and it's full of oil, what's the next step? Tear down the engine and look for blockages in the oil system? As I said I blew some compressed air into the sensor port to try and clear any blockage there.
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#7
04-26-2015, 09:35 AM
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Quote:
Look at the obvious first. The Oil Pressure Switch activates the "ground circuit" to the panel indicator light. There could be the "orange wire" grounding out causing the indicator light to illuminate. Take a VOM or DVM and check from the orange wire to ground, and see if this is sorted. Normal oil pressure, depending on oil type, oil temperature, and ambient temperature, would be between 30-60 PSI.
__________________
[B]Roland Bedell[/B] CC Models: 100, 105, 1450, 782, (2) 784, & 2072 [SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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#8
04-26-2015, 10:25 AM
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If I unplug the lead on the sensor the light goes out so it's not grounding out where it shouldn't be and the sensor is brand new so I have to assume the pressure is low and not having a pressure gauge can't really check it. What would cause the pressure to be low?
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#9
04-26-2015, 10:43 AM
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Quote:
Seriously, if you don't have oil pressure don't operate the engine.
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#10
04-26-2015, 10:44 AM
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OK...the next step is to install a actual gauge and see what the pressure actual is.
(A) Remove pressure switch (B) Install 1/8" NPT fitting (ie: see example) (C) Hook up Pressure Gauge. (D) Start engine. (E) Observe & record PSI readings at idle and WOT Report back.
__________________
[B]Roland Bedell[/B] CC Models: 100, 105, 1450, 782, (2) 784, & 2072 [SIZE="4"][B][COLOR="Red"]Buy:[/COLOR][COLOR="Blue"] Made in the USA[/COLOR][/B] [/SIZE]:American Flag 1:
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