Farm Equipment - 2 speed PTO

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2 speed PTO

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=207456
Printed Date: 18 Jul 2025 at 12:06am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 2 speed PTO

Posted By: Dave (Mid-MI)
Subject: 2 speed PTO
Date Posted: 13 Jul 2025 at 3:58pm

I want to install a 2 speed pto in my 180 diesel. Will the parts from a 200 tractor fit my 180? Thanks.

Replies:

Posted By: DrAllis
Date Posted: 13 Jul 2025 at 7:36pm

It depends. The lift arm housing (that houses the actual 540/1000 RPM gears) will interchange. The lift arms are different, so you'd have to swap them. The PTO shaft that goes from the lift arm housing forward to underneath the Power Director clutch is shorter on a 180/185, so that doesn't work. If the PTO clutch box configuration is the same between the two tractors (mechanical style or hydraulic clutch style) it will interchange as will the gear up inside that has to be swapped with the 540/1000 clutch box.

Posted By: Dave (Mid-MI)
Date Posted: 13 Jul 2025 at 7:47pm

So if the donor 200 has the hydraulic pto, as my 180 does, I need to swap lift arms and find the correct internal pto shaft. The correct internal pto shaft must be from a 180/185 with the two speed pto? Thanks.

Posted By: DrAllis
Date Posted: 13 Jul 2025 at 7:51pm

Yes. Correct. The shaft inside the rear end directly under the seat must be from a 180/185 dual speed PTO.