(800) 853-2651
SHOP NOW

McCormick Deering P12 power unit

N

Nebraska Kirk

Well-known Member
I have this P12 power unit that I bought a while back. I have it torn all apart and I was thinking about making it a winter project. It is small and simple enough that it won't take up the whole shop like a tractor will :lol: The pistons and sleeves are in good shape, I will just hone the cylinders, clean up the pistons, install new rings and grind the valves and seats while it is apart. Naturally go through the carb, fuel pump and mag too.

As you can see the fuel tank and hood are missing. I figured I can use an F12 fuel tank, it is probably not the same as the original but it will work.

Now I have some questions, what would this have been mounted on originally? Some sort of a skid? Someone has welded it to a tall stand for some reason. I was kinda thinking about making some sort of wheeled cart to mount the engine on, that way it could be more easily moved around.

P12.jpg

P12powerunit.jpg


Here are some cool original pictures of P12 power units at work!
0305002356-l.jpg

0305007544-l.jpg

0305007507-l.jpg
 
From one of the photos with the engine on the back of the truck the tanks looks like those used on a W-12, O-12, Fairway-12 or I-12 rather than the F-12.
 
I believe a W-12 hood (Get your shovel and head to California) would fit because that looks like a W-12 air cleaner.
 
I have both parts books. The w-12/14 uses a gas tank 26624 DEX whereas the P-12 26624DDX. Maybe the same tank?

The hoods are the same number. The w-12/14 & p12 hood is part number 27558DBX.

I have a P12 also that is missing the radiator, aircleaner, hood and gas tank, all of which I have been looking for.

I was told that alot of the p-12 power units were used as water pumps or ran oil wells. It was common for them to take off the radiator and either divert well water through them or hook them up to large open tanks so that they can run for a really long time. If they ran on gas, then a much larger tank was used, like a 55 gallon drum or if pumping an oil well, then it ran on well gas.
 
Thanks for posting the part numbers, Ron! I do not have a W12 parts book but I have found and ordered a P12 parts book. That is exactly what I was going to do, compare part numbers between the W12 and P12. So, yes, the P12 does use the same gas tank and hood as the W12. The numbers are the same, therefor the parts will interchange, the DD and DE after the part # are revisions, minor changes to the part that do not prevent them from interchanging, the X means an assembly comprised of several parts.

I don't understand why they would remove the radiator and run well water through them. With the self-contained closed system, the engine would stay hot and thereby run more efficiently whereas if well water was continuously running through the engine, it would run cold, unless something was rigged up to keep the engine running at peak operating temp. whether it be a thermostat or some sort of limiter on the water flow through the engine.
 
On some irrigation pumps and oil wells, the engine may run continously for days on end. Since the collant system is non pressurized and basically evaporative, if the coolant ran down, the engine would overhead and sieze up. So they would rig up a valve in the hose and adjust the flow so that it would exchange the water but not too fast.

I could not find the pic I had of a P-12 hooked up to a 500 gallon wooden barrel as it was pumping away on an oil well.

Keep in mind the C113 engine in the f-12/14 is the same as in the A&B; it was a WWII high precision engine that is very efficient and practically bulletproof.
 
Keep in mind the C113 engine in the f-12/14 is the same as in the A&B;
Click to expand...
No. The A engine was a total redesign that happened to use the same bore and stroke. A few parts interchange.
 
You must log in or register to reply here.

Similar threads

M
450 power steering unit
Replies
2
Views
523
Mike Fitz
M
Sterff89
Super A Pistons
Replies
9
Views
527
Sterff89
Sterff89
R
Hauling McCormick Deering 10 20
Replies
6
Views
436
mdm1
mdm1
Ellis Kinney
PTO seal
Replies
13
Views
630
rustred
rustred
M
9700 dual power
Replies
8
Views
374
mark in boonville ny
M
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top