Farm Equipment - WD45 Belt Sizes..?

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WD45 Belt Sizes..?

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=168946
Printed Date: 19 Aug 2025 at 1:58pm
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Topic: WD45 Belt Sizes..?

Posted By: ssccrab
Subject: WD45 Belt Sizes..?
Date Posted: 08 Mar 2020 at 8:25pm

My 1955 WD45 is missing two belts- the fan belt, and power steering belt. Looking to replace them tomorrow, so am wondering if anyone knows what sizes- diameter and width, these belts would be. I do have owners manuals but can't find that information. I might be looking in the wrong place. Thanks for the help!

Replies:

Posted By: AaronSEIA
Date Posted: 09 Mar 2020 at 6:34am

The fan belt is a 70209824 which looks to be .64x47. The PS belt is a 70227398. I think it's .5x59. Having a hard time finding the dimensions of that one on Google.

AaronSEIA

Posted By: ssccrab
Date Posted: 09 Mar 2020 at 8:07pm

Thank you! Went today and got the sizes specified in the numbers you provided. Much appreciated!

Posted By: ssccrab
Date Posted: 14 Apr 2020 at 9:07pm

So, I ended up using a 57" x 0.5" belt for the power steering, which is a perfect fit! Not too high or low. A 59" belt had the pulley spinning against the coolant hose, and I know that's usually the recommended size. Also went with a 46" x 0.5" belt for fan/alternator. My alternator wouldn't tighten out enough to take the slack out of the pulley.