lonesouth
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Costco has Delo 15w40(i think) on sale from time to time/
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Installed Mechanical Oil Pressure Gauge on MEP-803A
- Thread starter csheath
- Start date
It's a good thing I installed the backup oil pressure gauge. The last two times I ran the unit for it's monthly test I returned to find the panel gauge below zero. The mechanical gauge was still reading above 20 and the unit was still running so it has oil pressure.
Since my original install I fixed the oil drain tube so it sits level with the engine and now drains completely when I change oil. It remains a little over 20 PSI at operating temp now that I got all the ATF flush out.
Now I have to figure out why the panel oil pressure gauge is stopping while it is running. The last time it did it I gave it a knuckle thump and it came back to life. This time it remained pegged below zero even though it was working when I started the engine.
Since my original install I fixed the oil drain tube so it sits level with the engine and now drains completely when I change oil. It remains a little over 20 PSI at operating temp now that I got all the ATF flush out.
Now I have to figure out why the panel oil pressure gauge is stopping while it is running. The last time it did it I gave it a knuckle thump and it came back to life. This time it remained pegged below zero even though it was working when I started the engine.
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TM -24 has the test procedures for both the sender and the meter. Should be straight forward to narrow it down.
Just curious what the DC voltages at OP gauge terminals I, G & S when it's running and the gauge is at ~0 PSI.
I should be ~ 24VDC, S should be ~ 6.0 VDC at 20 PSI & G should be 0 VDC.
Just curious what the DC voltages at OP gauge terminals I, G & S when it's running and the gauge is at ~0 PSI.
I should be ~ 24VDC, S should be ~ 6.0 VDC at 20 PSI & G should be 0 VDC.
Last edited:
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I'd love to add the manual gauge to my machine, but the line for the arctic heater passes right where I'd need to be looking to see the gauge... oh well.
Demoh
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I found I run into a LOT of gauges that are pegged zero, I dont know why or how, but it seems the needle ends up burying itself under the lip which has more static friction than the force the gauge can exert to move it, so its effectively stuck until unjammed. Ive been taking the face off, bending the needle a little bit so it doesnt go under the lip and "so far" havent had any issues with that. I say "so far" because I have only done this on my unit and dont think this is a professional repair so I wouldnt put them back into production.
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How has the gauge held up over time? I assume with flying colors.
My panel gauge started working sort of. It doesn't start to read until the machine warms up but consistently comes back to life as the temperature begins to read. The fact that it starts and remains running lets me know it has oil pressure.
I still do monthly tests. I check all the fluids, look for leaks, and run it under a 40 amp load for an hour or so.
Last time I looked at the mechanical gauge was two months ago and it was still on par with the panel and no leaks. Pressure has stayed just above 20 PSIG hot since the last oil change.
I still do monthly tests. I check all the fluids, look for leaks, and run it under a 40 amp load for an hour or so.
Last time I looked at the mechanical gauge was two months ago and it was still on par with the panel and no leaks. Pressure has stayed just above 20 PSIG hot since the last oil change.