low pressure onan onan oil switch

[diamondlouis]

I took my bad switch to pep boys, they matched the threads to the old one --
only cost a few bucks, easy fix

 

[richard waters]

Well I did the deed. I went to the Onan distributor and bought a new
low pressure switch. It was less then $10. Got it home and installed it.
Started the ONAN and it ran for about 15 seconds and stopped. Started it
again and it stopped.

Then I pulled the wire attached to the switch and started it up again. This
time it run just fine and kept running. So I decided to do some checking.
The new low oil switch is open when not pressurized by oil. When it gets oil
pressure it closes to ground. I checked this with my mutlimeter before and
after
starting. I checked the old switch and it is open (no pressure).

Anyone know what gives? Did the counter guy at the Onan store give me
the wrong switch?

One good thing is I think I fixed the oil leak.

Going to go to the Dream Cruise now.

Richard Waters '76 PB, Troy, MI

 

[richard waters]

I finally got the Onan oil leak fixed. I went to the auto parts store and took
the leaking low oil pressure switch. After about 3 minutes the guy gave me
one that looked exactly like the original I had in my hand. It was a Borg
Warner Oil Pressure Switch with a part number S310. It was less then $5.00
and when I got it home it worked. The switch I got from Onan didn't work
and also I had to change the connector on the end of the wire to the
circuit board to accommodate the Onan switch. I wonder if the PO installed
an after market switch in the distant past and that is why the new Onan switch
looked different.

THANKS TO EVERYONE WHO OFFERED SUGGESTIONS ON HOW TO
FIX MY LEAK.

I learned my lesson. It doesn't always pay to go to the source of OEM parts!
Richard Waters '76 PB (with an Onan that doesn't leak) Troy, MI
- ----

> Well I did the deed. I went to the Onan distributor and bought a new
> low pressure switch. It was less then $10. Got it home and installed it.
> Started the ONAN and it ran for about 15 seconds and stopped. Started it
> again and it stopped.
>
> Then I pulled the wire attached to the switch and started it up again. This
> time it run just fine and kept running. So I decided to do some checking.
> The new low oil switch is open when not pressurized by oil. When it gets oil
> pressure it closes to ground. I checked this with my mutlimeter before and
> after
> starting. I checked the old switch and it is open (no pressure).
>
> Anyone know what gives? Did the counter guy at the Onan store give me
> the wrong switch?
>