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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...

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...

What does your 803 run for pressure when warm and loaded?

I would have liked to see it a little higher. It was over filled with Shell Rotella 15W40 before and the machine gauge settled into the exact same level after a long run under load. I may pour some STP or something in to see if it makes any difference but I'm not overly concerned about it. I...

Marshall Instruments CW00100 / Press Gauge with 1/8" NPT Connection Bought from StreetRays for $18.74

Yes it doesn't work. I replaced my power and voltage gauges with digital meters. The new digital voltage meter has a frequency and hour meter Incorporated in it.

Curiosity got the better of me on the oil pressure gauge accuracy. I've been wanting to flush and change oil and decided to add a mechanical oil pressure gauge. I drained the unit, refilled with ATF, and ran it up to temp with no load. Drained again and refilled with Motorcraft 15W40 Diesel...