Welcome! Please use the navigational links on your left to explore our website.

Company Logo (800) 853-2651 Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Kountry Life
Discussion Forum

Allis Chalmers 620 PTO Shaft conversion

Welcome Guest, Log in or Register

05-08-2008 20:14:39

Report to Moderator


I am new to this list and hope that you all can assist me. I just purchased an Allis Chalmers 620 and it has what I believe is a 15 spline female PTO. I am looking for an adapter to go from the 15 spline 1 inch to a standard male PTO shaft.

Does anyone know where or how i might get one or get a used 1 inch 15 spline PTO shaft that I could use to make one?



[Log in to Reply]   [No Email]

05-10-2008 12:23:33

Report to Moderator
 Re: Allis Chalmers 620 PTO Shaft conversion in reply to ajestrab, 05-08-2008 20:14:39  
I compliment you for asking questions before instead of after! Here's the deal. The standard for category 1 tractors is: 7/8' holes at the ends of the lower lift points, 3/4' holes at the toplink bracket and a 540 rpm male PTO. Category 0 is: 5/8' holes at the ends of the lower lift points and at the toplink bracket and a 2000 rpm female pto. To make a conversion work, the first thing necessary would be a reduction gearbox (from 2000 rpm to 540). The only practical and safe solution is to stick with Cat. 0 equipment. Your tractor was not built to handle (the much heavier) Cat. 1 equipment. Cat. 0 equipment can be bought new or used from garden tractor dealers and occasionally can be found at auctions. Hope this helps because I've seen too much nice equipment (like yours) messed up by trying to make this work.

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums

Today's Featured Article - A Farmall Restoration Story - What's Been Done So Far - by Sean Brinston. This is a story of my first real tractor restoration. My name is Sean Brinston and I was 15 almost 16 at the time of this.My neighbour directly across the road who I had helped with hay all the time had this tractor sitiing at his house for what I thought was 6 years. Finally I got the money and courage to ask him. I phoned him and he said it was already sold, eight years ago! ... [Read Article]

Latest Ad: 12.4X38 good tires on MF spin adjust rims asking 500.00 each [More Ads]

Copyright © 1997-2021 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy