D 19 purchase info
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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=8755
Printed Date: 19 Jan 2025 at 4:02pm
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Topic: D 19 purchase info
Posted By: Josh(NE)
Subject: D 19 purchase info
Date Posted: 28 Feb 2010 at 12:25am
I am looking at a D 19 gas. All looks well but one thing is bothering me. When it is first started it shows 40 pounds of oil pressure but after a 10 min warm up it shows 20PSI. How bad is 20 pounds of oil pressure? Is there any chance the pump is the problem or is it bearings? Any way to tell for sure?
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Allis Express
'65 190XT, 37 B, '72 170, '83 8030, and the IH 560 was a mistake
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Replies:
Posted By: Brian Jasper co. Ia
Date Posted: 28 Feb 2010 at 1:07pm
The long time A-C dealer in Indianola Ia told me once that the 262 bottom end is bullet proof. I know on my D262 in a D17 the factory gauge goes to within 1/8" of the top of the scale. I know it's the correct one for the 262. Actual pressure? I can't say for sure. Usually high oil pressure cold, much lower warm is one of 2 things. Worn bearings or stuck oil pressure relief valve.
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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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Posted By: Butch(OH)
Date Posted: 28 Feb 2010 at 1:21pm
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20 lbs at what RPM? Idle? I would be a bit worried about a motor that loses oil prsssure that quick in cold weather. Nobody on this end can do anything but guess about what is causing it, could be the pump, could be bearing clearances, could be the by-pass is stuck partialy open could be the oil is thinned down from gas leaking into the oil pan from a bad fuel pump too. The motor in our D-19 was so totaly worn out on the top end it was unreal but as Brian said the bottom end was great and it still carried good oil pressure. I can tell you two things that will NOT fix it, screwing with the by-pass spring pressure and any fix in a can.
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Posted By: BrianC,Ont
Date Posted: 28 Feb 2010 at 1:58pm
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If you could talk the owner into letting you put a test gauge on it that would be good. But I think that 20 lbs at idle is sufficent for a gas motor. We have had lots of tractors that barley moved the needle off of the stop and ran for a long time.
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Posted By: Brian Jasper co. Ia
Date Posted: 28 Feb 2010 at 3:57pm
I was going to add my engine's oil pressure never changes. Same hot or cold. Idle or rated RPM. Gauge is new genuine AGCO replacement.
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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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Posted By: Lars(wi)
Date Posted: 28 Feb 2010 at 4:11pm
my guess is it has a thin winter oil in it now,20 lbs. pressure aint bad if it 10w or so.
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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.
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Posted By: Josh(NE)
Date Posted: 28 Feb 2010 at 10:57pm
If it is 10w oil would you expect about 20 psi in summer with the use of 15w 40?
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Allis Express
'65 190XT, 37 B, '72 170, '83 8030, and the IH 560 was a mistake
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