Farm Equipment - Need Some Ideas

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Need Some Ideas

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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=56751
Printed Date: 06 Sep 2025 at 10:32am
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Topic: Need Some Ideas

Posted By: WEL(IN&TN)
Subject: Need Some Ideas
Date Posted: 12 Sep 2012 at 3:40pm

How can I tell if my WD engine (201) has a WD45 crankshaft in it without pulling the head and measuring the stroke? Previous owner said it had a 45 crankshaft in it but I am not sure.

Replies:

Posted By: JimD
Date Posted: 12 Sep 2012 at 3:51pm

Pull the pan and look at the casting number. Will start with 226 if it's a 45.

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Owner of http://www.OKtractor.com" rel="nofollow - OKtractor.com PM for an instant response on parts. Open M-F 9-6 Central.

We have new and used parts. 877-378-6543

Posted By: MNLonnie
Date Posted: 12 Sep 2012 at 4:00pm

Should be able to take a spark plug out and put a piece of wire in there and see if it's closer to 4" or 4 1/2" stroke.

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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

Posted By: JimD
Date Posted: 12 Sep 2012 at 4:30pm

The problem with the wire test is that the wire lays diagonal in the cylinder, andmakes the measuring challenging.

You could also measure displacement of 1 cylinder. Good old fashioned liquid method. Personally, I would just use it. The when the oil pan leaks, look at the crank and then you will know.

JimD

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Owner of http://www.OKtractor.com" rel="nofollow - OKtractor.com PM for an instant response on parts. Open M-F 9-6 Central.

We have new and used parts. 877-378-6543

Posted By: CTuckerNWIL
Date Posted: 12 Sep 2012 at 4:33pm

Take a plug out like Lon says. You can use a heavy zip strip or a piece of wire to measure the difference in length from TDC to BDC. 201 will be 4 inches, 226 will be 4.5 inches.

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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF