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
Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Help with JD 500C loader??

Welcome Guest, Log in or Register

09-19-2004 05:37:07

Report to Moderator

Hi everyone, I finally sold the old Dynahoe and got something I could work on and find parts for a bit easier. I have a 1981 John Deere model 500C loader Backhoe and the machine was well maintained and in good condition. The front loader boom and bucket seem to slowly move down on there own when raised. At times this is slower or faster. At first I thought maybe the fluid is leaking by in the cylinders as I have seen this before in single cylinders but in this case both cylinders would have to be leaking by the cup seals and I don't think thats it. So I believe it is probably leaking by within the loader and bucket control valves or probably just the orings inside?? Am I on the right track and how could I hook up a gauge or some other way of knowing for sure?? Lastly, where can I find JD OEM parts for a good price and a repair amnual for this?? Thanks very much!!

[Log in to Reply]   [No Email]
Jonathan in MA

09-20-2004 18:08:55

Report to Moderator
 Re: Help with JD 500C loader?? in reply to Exdynahoeman, 09-19-2004 05:37:07  
I'd lean towards the cylinder packings in one or both being the culprit. if only one of the 2 clinders were leaking internally, it would still settle as they are joined together after the valve port. Each cylinder (left and right)does not have its own oil ports on the control valve. The only orings on the valve spools prevent external leakage. There are no seals other than close-tolerance machining on the spools.

[Log in to Reply]  [No Email]

09-22-2004 17:22:51

Report to Moderator
 Re: Help with JD 500C loader?? in reply to Jonathan in MA, 09-20-2004 18:08:55  
Hmm, I was convinced that both cylinders cups would have to be faulty in order for this to happen but just one leaking by can allow it to lower on it's own?? It's worse sometimes than other times.... How would one figure out which cylinder is in need of cup seals?? My rods look fantastic in comparison to my old Dynahoe rods which were horrible with dented cylinders etc and they held!! So I just couldn't blame them on the JD.

[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 - Good As New - by Bill Goodwin. In the summer of 1995, my father, Russ Goodwin, and I acquired the 1945 Farmall B that my grandfather used as an overseer on a farm in Waynesboro, Georgia. After my grandfather’s death in 1955, J.P. Rollins, son of the landowner, used the tractor. In the winter 1985, while in his possession the engine block cracked and was unrepairable. He had told my father ... [Read Article]

Latest Ad: model 55 JD combine 12 ft complete outside folding grain augar hercules motor [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