Well, I'm back with an update of what happened. I tried to get the pump out the top and it absolutely refused to come. I ended up splitting the tractor behind the transmission and the pump came out easily. I disassembled the pump and found nothing broken or badly worn. Since the parts to rebuild the pump were over 50% of the cost of a pump, I replaced the pump with a new one. I put three new rings on the lift piston and new o-rings on the standpipe and under the lift cylinder. After putting it all back together it now works better than it has in the last 40 years.
In summary, all that I found was that all of the o-rings were hard and flat. I don't think that any of them could have held any pressure. I did all of the adjustments that the book called for with the cover off. The only adjustment that had to be done through the right-side inspection hole was the nut on the control valve shaft. My only conclusion is that the initial problem must have been associated with the pressure loss via the o-rings. The lift even stays up now and does not drift down. Thanks to all here for the assistance and moral support.
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 ]
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.
About this site - Yesterday's Tractors is your one-stop source for antique tractors. If you are interested in older tractors you've come to the right place! Join more than 275,000 other classic tractor enthusiasts from all over the globe. We have many resources for antique tractor enthusiasts available including photos, classified ads, more than 24 tractor discussion forums, a show guide, values, specs and much more. Bookmark this site and come back often. Thanks for stopping by! Feel free to use our feedback form to send us your comments, suggestions and ideas.