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MNLonnie 
Orange Level
Joined: 11 Sep 2009
Location: Baxter MN
Points: 4791
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 Topic: Model C oil pressure
Posted: 09 Aug 2011 at 5:56pm |
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Still farting with my C. Motor is brand new so I bought a new oil pressure gauge for it that says Allis Chalmers on it and the needle barely comes into normal at full throttle so I put a gauge with #'s on it and at full throttle it shows 13-14 psi. The book says it should have 15 psi so the question is what pressure range would the original gauges have been? I'm guessing the new gauge would probably read to around 80 psi and that's why it hardly registers. I think I'll pull a gauge off another tractor and compare the reading.
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Waukesha B, B, IB, G, styled WF, D15, 615 backhoe, 2-Oliver OC3's, 4 Ford Model T's, 3 Model A Fords, AV8 Coupe, AV8 Roadster, 1933 Ford Wrecker
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Brian Jasper co. Ia
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Joined: 11 Sep 2009
Location: Prairie City Ia
Points: 10508
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Posted: 09 Aug 2011 at 6:18pm |
Yep, 10 to 15 psi is normal oil pressure on a 125 engine. Get the original style gauge. Make sure it isn't one for a D17 with the full pressure lube system. Pretty sure they're higher. The diesel D17's run about 40 also.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Jeff Z. NY
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Joined: 11 Sep 2009
Points: 7326
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Posted: 09 Aug 2011 at 6:22pm |
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I wouldn't worry too much about it.
I have two that have been running at 5 lbs for twenty years.
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George R. (MN)
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Joined: 12 Sep 2009
Location: United States
Points: 102
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Posted: 09 Aug 2011 at 6:27pm |
Lonnie,
I know the new gauge for my CA reads a little less than the original. At full throttle the old gauge would peg between the r & m in Normal. New gauge between the o & r. The engine had not been overhauled other than a valve job. I seem to think the graphics on the new gauges are a touch off which would show a little less pressure. Hell, I'm just happy the old girl has oil pressure! Good luck with your C they are still great little tractors!
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My tractor is not leaking oil, it's just marking it's territory!
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Dick L
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Joined: 12 Sep 2009
Location: Edon Ohio
Points: 5087
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Posted: 09 Aug 2011 at 8:10pm |
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You do understand that new bearings will have absolutely no effect on the oil pressure in that engine. The amount of oil pressure is determined within the oil pump and oil filter only.
Sounds like you are good to go as it is.
Edited by Dick L - 09 Aug 2011 at 8:11pm
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Jeff Z. NY
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Posted: 09 Aug 2011 at 8:39pm |
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Right, If the needle moves run it.
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beeman
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Joined: 02 Jan 2011
Location: Alabama
Points: 230
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Posted: 09 Aug 2011 at 8:51pm |
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First thing I look at after starting is the oil gauge....Right after I rebuilt mine with new sleeves,piston kits,etc and new blades? in the pump ,it would once in awhile fail to show pressure on startup. I'd shut down and open the line from the pump and squirt oil down into the pump,. On restart it would be fine. Drove me nuts once in awhile . After maybe 10-15 hours of run time it pumps fine on start up. Sorry didn't mean to hijack post.....
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1949 B 3930 Ford- Have owned other Orange ,green,red,yellow,dark green tractors and equipment.
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Jeff Z. NY
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Joined: 11 Sep 2009
Points: 7326
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Posted: 09 Aug 2011 at 9:04pm |
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What you posted is by no means a hijack.
This is though:
If you have a pressure problem again you can save some time with no tools and just remove the oil filter and squirt some oil down the stand pipe.
One B I have needs this done once in a while.
I made a little holder and mounted it to the tractor to hold a little squirt can of oil.
I even painted the holder orange.
Not Persian Orange #1 just orange.
Some ask if it's #1 or #2 and I tell them it's #3.
That gives them something to think about. LOL
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beeman
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Joined: 02 Jan 2011
Location: Alabama
Points: 230
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Posted: 09 Aug 2011 at 9:12pm |
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Thanks ! I like the filter removal better than breaking into a line and you're right ...no tools required.
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1949 B 3930 Ford- Have owned other Orange ,green,red,yellow,dark green tractors and equipment.
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Jeff Z. NY
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Joined: 11 Sep 2009
Points: 7326
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Posted: 09 Aug 2011 at 9:27pm |
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Try it you'll like it!!!!LOL
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MNLonnie
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Joined: 11 Sep 2009
Location: Baxter MN
Points: 4791
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Posted: 09 Aug 2011 at 9:28pm |
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I think I'll just run it. Thanks for the input.
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Waukesha B, B, IB, G, styled WF, D15, 615 backhoe, 2-Oliver OC3's, 4 Ford Model T's, 3 Model A Fords, AV8 Coupe, AV8 Roadster, 1933 Ford Wrecker
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 87853
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Posted: 09 Aug 2011 at 9:59pm |
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Lon, a good pump will put out around 15 psi, never seen much more than that. Oldler engins will have 5-10 psi. I have seen a few that and 0-2 psi at idle, and maybe 8 when reved up.. Hate to see a motor with only 2 psi running
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Like them all, but love the "B"s.
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