Welcome! Please use the navigational links 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

Case Tractors Discussion Forum

Help needed to install new Eagle Hitch piston cup

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

08-27-2011 20:03:50

Report to Moderator

I just got a new piston cup for my 1950 VAC Eagle Hitch from my local Case dealer (part A30798). I understand how to center the cup by inverting piston in cylinder. The problem is the new cup is made of hard rubber/fiber and is 0.12 inch larger than the cylinder. Cylinder is 3.75" and OD of new cup is 3.87". I can't even put cup into cylinder inverted (small end diameter of cup into cylinder first) as it gets stuck about half way. I just can't see how to get this installed. I thought about a piston ring tool, but can't get the compression needed on the lip of the new piston cup. I also tried to "soften" the lip of the new piston cup by rolling edge on my work bench. It's still very stiff. I'm about ready to take this $38 part back to Case because I think the Taiwan company that made it made it too large. And yes I did apply hyd. oil to cylinder, piston, and cup.

[Log in to Reply]   [No Email]
Joe (Wa)

08-27-2011 23:16:09

Report to Moderator
 Re: Help needed to install new Eagle Hitch piston cup in reply to 1950CaseVac, 08-27-2011 20:03:50  
I had to soak a leather one in hot water to make it more pliable. It swelled up some but went in, I don"t it would have otherwise. Don"t know if that will work on your composite.


[Log in to Reply]  [No Email]

08-28-2011 19:41:55

Report to Moderator
 Re: Help needed to install new Eagle Hitch piston cup in reply to Joe (Wa), 08-27-2011 23:16:09  
third party image

Thanks Joe. I did put the composite cup into hot water and then stuck it inverted into the cylinder without the piston and plate. The hot water did soften the cup temporarily and just long enough to get it in. When I put the piston/cup/plate together with loose bolts inverted into the cylinder, I couldn't get it in. Used my caliper to determine that the plate was the problem - it was larger than the space inside the cup. So I put a bevel on the plate edge facing the cup. That solved the problem. Getting the assembly started in the cylinder was a challenge, but once in I was able to drive it down. Tested it and it works well. Just FYI,thought I'd include the photo I posted on this site back in 2000 when I did the restoration.

[Log in to Reply]  [No Email]
Joe (Wa)

08-28-2011 20:58:43

Report to Moderator
 Re: Help needed to install new Eagle Hitch piston cup in reply to 1950CaseVac, 08-28-2011 19:41:55  
That is a very nice looking tractor. Very good info to keep in mind on that center plate if I ever need to change another cup type. Mine is a "53 with the o-ring piston, fast & easy changeout.


[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 - Museum Coverage: The Stuttgart Agricultural Museum - by Cindy Ladage. While cold wind was blowing back in Illinois, in Arkansas, daffodils were in bloom, and the Magnolia trees were adorned with fragrant blossoms. Stuttgart, Arkansas was the site of this year's winter Minneapolis Moline Collector's show February 25-27, 1999. The show was held at the Oliver Museum created by Don Oliver, the pioneer of the four wheel drive tractor. Oliver along with Gale Stroh and Kenneth Bull using Minneapolis Moline tractors and parts created what has become known as ... [Read Article]

Latest Ad: WTB Planter Boxes for Oliver Pipe Mount Planter to fit a 66,77,or 88. Need to be not rusted out. Call or Text Wyatt at 573-2fivenine-336eight [More Ads]

Copyright © 1997-2022 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