are D17 and WD45 distributors the same, interchan?
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=210406
Printed Date: 16 Mar 2026 at 12:21pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: are D17 and WD45 distributors the same, interchan?
Posted By: Michael Crowe
Subject: are D17 and WD45 distributors the same, interchan?
Date Posted: 15 Mar 2026 at 7:25pm
just need to know the answer to that question. thanks michael
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Replies:
Posted By: den/southern illinoi
Date Posted: 16 Mar 2026 at 8:25am
Had a Series 1 D 17 with power steering which of course works thru the distributor. Sold the distributor/power steering off the D 17. Installed a WD 45 distributor so I say they are basically the same.
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Own 4 wheel 20, 5020 and associated equipment and 1 electric forklift. Also a 720 garden tractor, 720 Diesel. 620 and soon a 616 garden tractor.
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Posted By: SteveM C/IL
Date Posted: 16 Mar 2026 at 8:46am
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I would bet they are but don't know. Sounds like Den maybe switched the drive housing and all and I can see that working. Sounds like you are talking just the distributor.
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Posted By: DrAllis
Date Posted: 16 Mar 2026 at 8:53am
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I didn't get a chance to look this morning. Digging out from the snow was priority. The distributers will interchange, but I'm real sure the timing advance mechanisms are slightly different. The WD45 engine probably reaches full timing advance by 1400 RPM, which is rated speed. The D-17 engine reaches full advance by 1650 or 1700 RPM because that's where rated speed is on that engine. So, if you used a D-17 dist on a WD45 engine, full advance wouldn't occur quite soon enough, as high idle is 1700 RPM.
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Posted By: SteveM C/IL
Date Posted: 16 Mar 2026 at 9:14am
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Interchangeability and sameness are two different things. I'm sure Doc nailed it
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