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
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
Kountry Life
  
Discussion Forum
:

Hydrolic pump on WD

Welcome Guest, Log in or Register
Author 
brian

08-27-2002 08:55:47




Report to Moderator

My WD has an Allice back blade on it, and the rams lift it just fine, but won't lift much weight beyond that of the blade. I tried pulling up a "T" fence post and it wouldn't budge it. I re-adjusted the leaver linkage in the way that the manual describes, but this doesn't make much difference. I also changed the oil.

Does anyone have suggestions? Can I assume I need a rebuilt pump? If so, should I buy new or rebuilt?

Thanks, Brian

[Log in to Reply]   [No Email]
Don L.

08-28-2002 09:02:15




Report to Moderator
 Re: Hydrolic pump on WD in reply to brian, 08-27-2002 08:55:47  
I have a good used pump with good lopes for $175.00 90 day warrenty. ph 507 433 0073



[Log in to Reply]  [No Email]
Brian G. NY

08-27-2002 17:36:03




Report to Moderator
 Re: Hydrolic pump on WD in reply to brian, 08-27-2002 08:55:47  
Consider the leverage involved. If you were trying to pull stakes by hooking way out at the end of the back blade, there is a tremendous amount of resistance working against you. I lifted the back end of my Ranger pickup (empty) off the ground by slipping the lock plate of my back blade under the bumper but I'm sure I couldn't have lifted the front end. There are two rams but they are relatively small and the A-C back blade is heavy in and of itself; most of the weight being way out back.

[Log in to Reply]  [No Email]
David T (MO)

08-27-2002 13:04:49




Report to Moderator
 Re: Hydrolic pump on WD in reply to brian, 08-27-2002 08:55:47  
Here's a long response I wrote a while back for someone who was having the same problem.

---

The pump can be set for all sorts of jobs so be sure that it is set up correctly for the job you need to do. There should be a decal on the battery box just above the pump that shows you how to set the pump up. The pump has four manual adjustment knobs. The most commonly used set up for me is the hold position setting. The lowest knob on the side of the pump is the drawbar adjustment. Its use is for pulling plows and the like and gives traction control. Turn this knob all the way into the body detent, locking the plate into position. The second knob is on top of the pump on the side linkages. This is the hold position adjustment. Turn it so that it locks the two plates together, allowing them to move as one. The third knob is also on top but on the front of the pump. This controls the delay lift. Turn it all the way out until it hits its stop. The last knob is on the front of the pump about half way down. It controls the rate of lift. Turning it all the way out gives you fast lift. All the way in is slow lift.

If you are having the same problems I had, the pump isn't developing the pressure it should before the unloading valve pops off (also called a pressure relief valve). It worked fine without a load but could not lift anything heavy.

I first bought a pressure gauge (0-5000 psi) and installed it at the small port on the top front of the pump where the 'booster gauge' was normally attached. My pump was only developing about 1000 psi, less than a third of its 3500 psi rating and that wasn't enough to pickup even a small 4x4 round bale of hay.

You'll have to pull the pump off the tractor (three nuts and two bolts) to access the front cover plate. Four bolts takes the cover plate off. The plate covers two cylinders, the first one has the last manual adjustment knob I mentioned above, the rate of lift control. The cylinder without the adjustment contains the unloading valve. Pull the piston out of the cylinder (you may have to tap it gently with a hammer to loosen the o-rings, the unloading spring should push it way out once the cylinder is freed up so keep a hand over it). This cylinder is the valve seat assembly which has two outside o-rings and contains the valve seat internally. Watch out for the valve ball as it may pop or fall out unexpectedly. Next pull out the upper spring retainer. Watch out for shims falling off the underside of this retainer. Last out is the spring itself. The spring may be broken or may have weakened over the years, the spring retainers may be broken, or the o-rings around the valve seat assembly may be leaking.

Adjustments are made by adding more shims on top of the spring to increase the working pressure. (if you put shims under the spring, be sure they don't block the off-center hole in the lower spring retainer, M12 washers worked for me.) Its trial and error here. I doubled the number of shims (a little over a sixteenth of an inch) and still need to reinstall the pump to see where this brings me. If it isn't enough, I'll have to pull the pump off the tractor again and add more shims. If its over 3500 psi by my gauge, I'll either have to pull some shims out or be very careful not to hit the end of travel on the rams and blow hoses (at best).

[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


Today's Featured Article - Tractors and Winter - by Staff. Unfortunately, tractors and winter don't mix well. It seems that I can start out with my tractors in great running condition but sometime during the long cold dark winter they quickly revert to the lawn-art category. The lack of running, cold weather, and admitted neglect all take their toll on a machine. If you are lucky enough to not need your tractors during the winter months you can perform a few simple maintenance items to winterize and come spring have them going by reversing the process. If you need your tractor in ready-to-run condition (like that ... [Read Article]

Latest Ad: I HAVE A FRIEND THAT NEEDS A GOOD STRAIGHT NOSE CONE FOR FARMALL C LET ME KNOW WHAT YOU HAVE [More Ads]

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