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

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

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

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

Research & Info
Articles
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
Glossary

Miscellaneous
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
  
John Deere Tractors Discussion Forum
:

John Deere 730 power steering repair

Welcome Guest, Log in or Register
Author  [Modern View]
Andy R

06-13-2020 20:11:23




Report to Moderator

My JD 730 was leaking power steering oil out of the bottom bad. Probably the bottom "O" ring. None of the backer rings were left and the "O" rings had flat spots worn in them. Bought the service manual, tore it apart and cleaned it up the last couple of days. Pretty much everything checks out OK. The one place I can see some wear is in the bottom casting which I believe is called the quill. Over the years the outer race of the thrust bearing (carries the load of the tractor when operating with a narrow front) has slightly worn into the casting. I don't think it was machined that way. Seems like there is a groove of maybe .020 where the outer race would put pressure pushing upward against it. This wear would cause the spindle to move upward slightly. Moving the spindle upward would cause the bolted rotating sealing vane to slightly move upward in the "cylinder" of the power steering system. Is there enough "give and take" (clearance) in the power steering cylinder to allow for.020 - .030 upward movement of the rotating sealing vane without causing premature wear to the seals? Am I over thinking this small amount of wear and slight upward movement of the spindle or should I add a thin thrust washer under the inner race of the thrust bearing moving the spindle downward some? Another thing is the narrow front is coming off and a square wide front is going on. That takes almost all of the stress off of the thrust bearing and quill and with enough end clearance on the spindle the sealing vanes could center themselves in the cylinder. Any ideas appreicated.

[Log in to Reply]   [No Email]
Dan in Ohio

06-14-2020 05:05:01




Report to Moderator
 Re: John Deere 730 power steering repair in reply to Andy R, 06-13-2020 20:11:23  
Andy,

The place to add or remove shim is under the worm gear at the top of the pedestal. Measure end play and adjust as needed to a range of 0.004 - 0.021. I have seen some with no and one with as many as four when replacing seals in some of my own.


[Log in to Reply]  [No Email]
ET

06-14-2020 02:52:33




Report to Moderator
 Re: John Deere 730 power steering repair in reply to Andy R, 06-13-2020 20:11:23  
If you are going to put a wide front end on the tractor I wouldn't worry about it.



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

Hop to:


TRACTOR PARTS TRACTOR MANUALS
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


Copyright © 1997-2020 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