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Farmall & IHC Tractors Discussion Forum
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oil pressure on 1941 H

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RMO/MN

01-11-2007 15:58:18




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I know this has probably been addressed before. When plowing with my H this fall. My oil pressure gauge ( brand new from OEM)would be just above the red area and when the tractor would lug down just a little bit it would go into the red area. It also goes red when I let it out in road gear. I've been told this is normal I would appreciate more feed back
Thanks in advance
Bob




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Roger Mills

01-12-2007 08:03:06




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 Re: oil pressure on 1941 H in reply to RMO/MN, 01-11-2007 15:58:18  
The OEM gauges, (and others), amps, temp and oil pressure, are new Rochester units. BUT no attempt was made to duplicate the original temp or pressure reading of the original gauge. The oil prissure gauge may have a 100 pound full scale or it might be 80 or ?, so the top of the RED may be diffierent than the original, I don't know what the original was. I know for a fact that the temp color scales are wrong, way too high at the color band changes. I also know for a fact that the ammeter has a different font style and the needle shape is not the same as the original. I have working originals of both of these to compare. The CIH logo is close on all of them but no cigar.

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Jossette

01-11-2007 20:17:11




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 Re: oil pressure on 1941 H in reply to RMO/MN, 01-11-2007 15:58:18  
I would get a gauge with the numbers so you know where you are at..then apply it to your colored gauge on the tractor



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CNKS

01-11-2007 18:34:17




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 Re: oil pressure on 1941 H in reply to RMO/MN, 01-11-2007 15:58:18  
Your oil pressure is low, it may or may not be a problem. Try the oil pump thing below. As to the drop under load, changes in oil pressure are caused by rpm. The slower the rpm, the lower the pressure. You have less rpm under load than with the clutch pushed in, likewise when you start out with a load, the rpm drops, then increases as the tractor gets going. You will see the same effect when reducing rpm with the throttle, if the gauge is working right.

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jhb

01-11-2007 17:58:53




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 Re: oil pressure on 1941 H in reply to RMO/MN, 01-11-2007 15:58:18  
Bought a Super M with very little oil pressure at full throttle. Checked to see if the valve rockers were being oiled and they were. Seller had just put a new oil pressure gauge on and that had not changed anything. I pulled the pan and removed the oil pump had the plate on the bottom planed, put it back together and it had all kinds of oil pressure. Never new if the planning helped or just taking it apart and putting it back together did the trick. The plates get groves in them and the oil pump does not produce the right pressure. Just my experience.

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Easy1

01-12-2007 09:05:21




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 Re: oil pressure on 1941 H in reply to jhb, 01-11-2007 17:58:53  
I did the same thing on my H. I took the oil pump cover off, took it to work, surface ground it flat, and put it back in. Works great.



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El Toro

01-11-2007 17:43:15




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 Re: oil pressure on 1941 H in reply to RMO/MN, 01-11-2007 15:58:18  
I would use 30wt oil when plowing. Hal



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Berry450d

01-11-2007 16:17:13




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 Re: oil pressure on 1941 H in reply to RMO/MN, 01-11-2007 15:58:18  
I work several old Farmalls most have original gauges in them , and most vary with oil pressure. I have a 49 C after warming up it shows very little oil pressure. I have owned this tractor since 1975 and it has always done this, but she keeps on going 1000`s of hours on her. I have a 50 M hold high oil pressure all the time. Gauges dont always show true readings.



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