oil pressure gauge quit

[meindl]

My oil pressure gauge began reading low pressure, then no pressure. Engine runs fine and when I sut it down, I can hear oil running back down into the oil pan. There is oil all over the rockers also, the pump seems to be working. should I just get a new gauge or is there a way to make sure the pump is or is not working?
Thanks you, Meindl

 

[phil2968]

Manual gauge screwed into the block. Is this a deuce?

 

[DeucesWild11]

Mine only works when I tap on the side of the gauge. It reads normal for a little bit till it quits and then I have to tap on it again. Thought I would ask here since it's a similar issue. Anyone have this problem?

 

[porkysplace]

If you have to tap on a gauge to get it to work it's either a bad gauge or electricial connection.

 

[DeucesWild11]

Thanks that is what I was thinking.. Possibly a bad ground or something.

 

[meindl]

My oil pressure gauge began reading low pressure, then no pressure. Engine runs fine and when I sut it down, I can hear oil running back down into the oil pan. There is oil all over the rockers also, the pump seems to be working. should I just get a new gauge or is there a way to make sure the pump is or is not working?
Thanks you, Meindl

Yup, its a deuce m35a2

 

[porkysplace]

Do a search for this thread it will tell you how to test it ; Super-low oil pressure, M35A2 multifuel

Or download this TM ; TM9-2320-361-24-1.pdf
and go to chapter 2 it's the trouble shooting section for gauges

 

[59apache]

trial this:
Stewart Warner 82323 - Stewart Warner Deluxe Series Gauges - Overview - SummitRacing.com
Auto Meter 3224 - Auto Meter Tubing and Line Kits - Overview - SummitRacing.com


should be the end of the electrical problems.....

 

[porkysplace]

trial this:
Stewart Warner 82323 - Stewart Warner Deluxe Series Gauges - Overview - SummitRacing.com
Auto Meter 3224 - Auto Meter Tubing and Line Kits - Overview - SummitRacing.com


should be the end of the electrical problems.....

You won't have a light in the gauge SW gauge it's 12v.

 

[59apache]

why?
#1893 MINIATURE BULB BA9S BASE, T3 1/4 M BAY 14V .33A 2CP, #1893, 1893, #1893 BULB, #1893 LAMP, #1893 MINIATURE, #1893 MINIATURE LAMP, #1893 INDICATOR, EIKO #40413
#1873 MINIATURE BULB BA9S BASE, T3 1/4 SC M BAY 28V .2A 3CP, #1873, #1873 BULB, #1873 LAMP, #1873 MINIATURE, #1873 MINIATURE LAMP, #1873 INDICATOR, EIKO#40404

 

[doghead]

The correct gauge and sending unit is readily available, as is the TM to diagnose the gauges.

 

[59apache]

correct.
IF you got a workin gauge and If you got a mathcing sending unit and IF you have no power / ground problems, you got a correct working pressure gauge.
The if's are the reason for me to trial a mechanical SW gauge. i've read to many post about mismatching sending units and ground probems and my own experience tells me this my way to go.
I've received my sw gauge few days ago, looks good, pipe fits, price is ok.
will show results ASAP.

 

[rattlecan6104]

my oil pressure gauge bounces around ....

 

[zak]

Run a ground wire from a good source to the gauge.

 

[59apache]

broken wire is also possible....

 

[cranetruck]

There are three connections that must be intact for the gauge to work, ground, +24VDC and the wire to the grounded sending unit.
When power and ground are properly connected, an open circuit to the sending unit will give you full deflection and a short, no needle movement at all...

 

[meindl]

gauge

My gauge looks electric, is that stock. I thought it would have a small oil line to it?

 

[DeucesWild11]

Yeah, mine looks like that too, no oil line. I got to dive in and read the TM's and check the ground. Tapping it to work is starting to get to me.

 

[meindl]

Yup, mine is electric. Guess I'll just get a new gauge and sending unit. The thing works when I start it then quits minutes later. It does appear to be getting oil. Thanks for the tips.