[Farmall] oil pressure

[Alan Riley]

Bob, how about checking the gauge using air pressure?  I made an
adaptor up that consists of a Schrader valve with a quick-change air
line fitting.  I can connect it up the end of an air line and verify the
pressure coming from the regulator using a known good tire pressure
gauge.  You could apply air pressure to your oil pressure gauge,
increasing it until the OP gauge was reading half scale, full scale, or
whatever, then check the air line pressure using the tire gauge.  The
tire gauge seems to be more accurate at low readings than the
gauges used on many air pressure regulators.

Alan



----- Original Message ----- 
From: "Bob Currie" <tracturs at att.net>
To: "Farmall List" <Farmall at lists.antique-tractor.com>
Sent: Saturday, November 24, 2007 7:13 PM
Subject: [Farmall] oil pressure


> Most of the unstyled IH products ran on pretty low oil pressure from what I have gathered. In trying to determine what 
> is "good oil pressure" for a 10-20, 15-30, Farmall Regular or F-20/F-30, I'm getting all different kinds of 
> information. So I figure the best way to determine the good or bad pressure is with the correct oil pressure gauge for 
> my particular tractor(s). What I've found is pretty confusing. Two different part numbers for the 10-20, 15-30 gauge 
> show using either a 4# gauge, or a 10# gauge. I see a very nice original gauge for a Regular/F-20 on Ebay right now 
> and the seller says it tested for a 25# gauge. I talked to a couple of gauge remanufacturing people in our hobby and 
> they say a #15 oil pressure gauge would be correct. So my question for you folks is where would you go to find the 
> correct pressure listings and applications for the various tractors,, and how do you test a gauge to know what 
> pressure reading it is showing? These old gauges don't have any mea!
> ningful numbers on them to use as a reference. So if the dial comes halfway up and it pointing straight up and down, 
> is that 5lbs, 7.5lbs, or maybe 12.5lbs.?
>
> bobcurrie
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