Yesterday's Tractor Co. New Parts for Old Tractors
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Tractor Manuals
Tractor Parts
Classified Ads
Photo Ads

Discussion Forums
Project Journals
Tractor Town
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
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
Enter your email address to receive our newsletter!

Tractor Talk Discussion Forum

Pto question

Author  [Modern View]

05-31-2014 19:35:30

Report to Moderator

Under normal circumstances, what do you think is the minimum amount of overlap on a telescoping pto shaft? If both pieces are four foot long (eight foot pulled apart) can the shaft be run with only one foot of overlap? That would mean it was extended to seven feet. How much overlap do you need for stability?

The reason I ask is that I am fiddling with my pull rotary mower. It has a two foot fixed piece with a pillow block and then the large telescoping piece. The pillow block has been cobbled and nothing works like it should. I am considering taking the stub shaft out completely and running it with one telescoping shaft like normal implements. I was just curious whether I could use the shaft pieces that are on it (I think they are each four foot pieces).

[Reply]   [No Email]
Tx Jim

06-01-2014 03:48:41

Report to Moderator
 Re: Pto question in reply to Bret4207, 05-31-2014 19:35:30  

If both separated shafts are four ft long each and then 7 ft when slide together they will only be overlapped 6 inches which isn't enough overlap if ditches/terraces are encountered.

[Reply]  [No Email]
Owen Aaland

06-01-2014 15:23:32

Report to Moderator
 Re: Pto question in reply to Tx Jim, 06-01-2014 03:48:41  
Quoting Removed, click Modern View to see

Let's do the math on this one again :wink:

[Reply]  [No Email]
gene bender

05-31-2014 22:29:01

Report to Moderator
 Re: Pto question in reply to Notjustair, 05-31-2014 19:35:30  
One foot will not be a good idea it will blow up as 7ft is way too much length.

[Reply]  [No Email]

05-31-2014 20:34:14

Report to Moderator
 Re: Pto question in reply to Notjustair, 05-31-2014 19:35:30  
If possible, do a search for what type of PTO shaft that you have. I just did a quick search and what I found was a shaft 48" fully compressed could only be extended to 63", but there were different grades/ratings of shafts with different extention allowances for each grade. I personally have never seen or used a shaft extended more than half overlap (ie 48" - 72"). Having said this, I would not recommend using your current shaft maxed out to the limit. I agree with the other posts that turning and/or vibration will become an issue. It is a two piece setup for a reason.

[Reply]  [No Email]
Paul from MI

05-31-2014 20:01:57

Report to Moderator
 Re: Pto question in reply to Notjustair, 05-31-2014 19:35:30  
In order to run smoothly a PTO shaft must operate so that the angle of each universal joint is the same. Otherwise the driven machine shaft accelerates and decelerates twice with each revolution of the PTO shaft. Normally this is accomplished by making the hitch pin about midway between the universal joints. This is also why the crosses are in line with each other, not at an angle to each other.

[Reply]  [No Email]
caterpillar guy

05-31-2014 19:54:47

Report to Moderator
 Re: Pto question in reply to Notjustair, 05-31-2014 19:35:30  
Me thinks it will be a vibration issue when you turn. Since mowing usually requires some short turns. It will also probably hit the tire when turning.

[Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Add a Reply]

Hop to:
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ More Info ]

Home  |  Forums

Copyright © 1997-2014 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