Construction and other equipment

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Help identify PTO

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=210764
Printed Date: 15 Apr 2026 at 8:04am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Help identify PTO

Posted By: Mschwartz
Subject: Help identify PTO
Date Posted: 15 Apr 2026 at 12:14am

Picked up at an auction, similar bolt pattern to an M but is larger. Has HD6 written on it but I am pretty sure that is incorrect. Any help? Thanks, Mike uploads/25518/7C2E4132-6125-4B99-A55E-7796F7A3FB02.jpeg" rel="nofollow - uploads/25518/7C2E4132-6125-4B99-A55E-7796F7A3FB02.jpeg

Replies:

Posted By: Mschwartz
Date Posted: 15 Apr 2026 at 12:17am

another picture uploads/25518/F9477980-E9AD-4F50-8561-0F1659A98AEB.jpeg" rel="nofollow - uploads/25518/F9477980-E9AD-4F50-8561-0F1659A98AEB.jpeg

Posted By: Codger
Date Posted: 15 Apr 2026 at 6:26am

Looks to be a speed reducer/increaser used to drive something at a different output speed than input.

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