Farm Equipment - Allis 226 vs Leroi 226

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Allis 226 vs Leroi 226

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=155151
Printed Date: 11 May 2025 at 8:30pm
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Topic: Allis 226 vs Leroi 226

Posted By: TedBuiskerN.IL.
Subject: Allis 226 vs Leroi 226
Date Posted: 29 Oct 2018 at 8:28pm

Can anyone tell me the differences between these two engines? Is there any parts interchangeability between the two engines?

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Most problems can be solved with the proper application of high explosives.

Replies:

Posted By: Bill Long
Date Posted: 29 Oct 2018 at 8:32pm

Ted, I wish I knew. I do remember having a person come to our parts department in my father's dealership and state he needed a water pump. I looked it up for him and I do not think it was what he wanted. Come to find out that he was looking for a part for a Leroi engine.

Take good care.

Good Luck!

Bill Long

Posted By: SteveM C/IL
Date Posted: 29 Oct 2018 at 8:35pm

Someone will know. Look like twins don't they? Can't remember what I once knew.

Posted By: JC-WI
Date Posted: 29 Oct 2018 at 10:03pm

If I remember right, combustion chamber is in the head on the LeRoy, connecting rods are longer too.

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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."

Posted By: wayneIA
Date Posted: 30 Oct 2018 at 12:19am

I rebuilt the Leroi D226 in my air compressor (number 4 rod bearing spun), the crank has extra weight on it and the rod caps for the crank are at an angle where the 45 rods are square to the rod. I used a 45 crank and rods. The Leroi engine had 4" flat top pistons. So I used a 4 1/8" overbore flat top WD sleeve and piston set. You must use the spark plugs for a Leroi D226 engine though since they are a little shorter and the standard 45 plugs will hit the pistons. In the end if you are just doing a simple overhaul, you can order the WD overhaul kit and everything should work. I never compared the journals on the cranks to see if they are the same size on the rods (mains are the same), but the cam bearings and all the other parts worked on the engine, had one issue with the oil hole on the center cam bearing not lining up to send oil to the rocker shaft and had to drill an oil hole for it to lube the rockers.

Posted By: Bill_MN
Date Posted: 30 Oct 2018 at 9:49pm

Combustion chamber in head, longer canted rods, slightly different external castings and parts like water pump, timing cover, etc. Beyond that, not sure on specifics.

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1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow

Posted By: TedBuiskerN.IL.
Date Posted: 31 Oct 2018 at 8:14am

Thanks everyone, I knew there were some differences, but they are twins to the Allis engine, so I wondered what the difference were.

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Most problems can be solved with the proper application of high explosives.

Posted By: TramwayGuy
Date Posted: 31 Oct 2018 at 3:33pm

I never heard a simple explanation as to whether the Leroi engines were built by Allis; or were the Allis engines built by Leroi? Or perhaps were they designed by the same outfit?

Posted By: Lonn
Date Posted: 01 Nov 2018 at 6:52am

Allis poured some of the castings for LeRoi

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