Farm Equipment - 8000 pto size

Print Page | Close Window

8000 pto size

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=194403
Printed Date: 04 Apr 2026 at 3:13am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 8000 pto size

Posted By: Mikez
Subject: 8000 pto size
Date Posted: 03 Apr 2023 at 6:17pm

Hello

When someone says the equipment has large 1000 splin.

What does the 8050 have for 1000 pto.

Sorry I don’t have experience with them. Everything Iv done is 540.

Thanks

Replies:

Posted By: bigal121892
Date Posted: 03 Apr 2023 at 7:05pm

8050 has the 1-3/8" shaft.

Posted By: Unit3
Date Posted: 03 Apr 2023 at 8:27pm

7080, 7580, 8550, 8070, 4W220, and the 4W305 all had the large 1000. IF, if your tractor has the two speed, reversible PTO, then you will have the small 1000 PTO.

-------------
2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C

Posted By: Unit3
Date Posted: 03 Apr 2023 at 8:31pm

Others will know better than me, but did some of the 7060’s have the large 1000PTO only?

-------------
2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C

Posted By: MACK
Date Posted: 03 Apr 2023 at 8:36pm

No, a 7060 would have small 1000. MACK

Posted By: Mikez
Date Posted: 03 Apr 2023 at 8:52pm

Thank you.

I’m down a brush hog due to accident and neighbor has one I could use with large 1000 spline.

Posted By: DrAllis
Date Posted: 04 Apr 2023 at 6:55am

It depends a little on what decade we are talking about, but the SAE group decided that anything over 165 pto HP must have the larger 1 3/4" spline PTO shaft. Same goes for the 540 to 1000 switch. Seems as tho in the 1960's , 1000 RPM was required on anything over 100 pto HP. But, Farmall kept a dual 540/1000 set-up all the way thru the 80's on most of their larger models.