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
TractorLinks.com
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Kountry Life
  
Ford Tractors Discussion Forum
:

for Bern

Welcome Guest, Log in or Register
Author  [Modern View]
Dale2

10-04-2019 20:32:25




Report to Moderator

You answered a question on a 601 ford loosing prime on the hydraulic pump not long ago. I have replaced the seal, the wobble shaft as it had a groove worn in it. Replaced needle bearing and wobble shaft bearing. I also replaced the orings on the transmission housing and the 2 at the pump. I have the accessory plate turned around and a pressure gauge in the port. When I start the tractor and loosen the bleed screw on the pump . The pump picks up prime. when I tighten the plug the pressure comes up to around 1900 to 2000 psi and within 10 to 15 seconds will drop back to zero. To get the pressure to come back up I have to shut off engine and start the bleed process again. Do you think the relief valve item 94 in drawing fo269 in the I T manual could be sticking open or should I be looking else where.
Thanks
Dale

[Log in to Reply]   [No Email]
sotxbill

10-05-2019 13:50:43




Report to Moderator
 Re: for Bern in reply to Dale2, 10-04-2019 20:32:25  

as the pressure comes up, it will open the relief valve, and try to raise the lift. On the lift, when equal librium is obtained, the the control valve opens... either of the two valves can have a bit of rust, so that when the open, they hang up... staying open...

in some cases I have found that operating the tractor over and over, and moving the lift lever back and forth, I eventually got the valves to work loose and start operating correctly... its a crap shoot but it does work in some cases, where a tractor has set for a long time.
A while back drove a 740 down the road with a shredder bouncing and dragging, and after about three miles, the control valve worked loose and all was good. so,,, you never know...

[Log in to Reply]  [No Email]
WayneIA

10-05-2019 13:19:08




Report to Moderator
 Re: for Bern in reply to Dale2, 10-04-2019 20:32:25  
I do not have a copy of the I&T manual but I guess turning the plate would be a way to check maximum pressure. I would suggest bleeding the hydraulic system till all the air is gone by running a hose from the pump to the fill plug at the reservoir until all air is gone , then check for maximum pressure. I doubt very much if the o rings at the back of the transmission are letting in any air .



[Log in to Reply]  [No Email]
Dale2

10-05-2019 10:18:33




Report to Moderator
 Re: for Bern in reply to Dale2, 10-04-2019 20:32:25  
I have now found that there are always air bubbles coming from the pump, so I assume I am sucking in air. Has anyone ever seen the o rings between the transmission housing and the lift compartment leaking air?



[Log in to Reply]  [No Email]
WayneIA

10-05-2019 06:56:49




Report to Moderator
 Re: for Bern in reply to Dale2, 10-04-2019 20:32:25  
Explain "I have the accessory plate turn around" Do you mean the plate under the seat on the right front corner of the lift chest? Do you have that plate turned a half a turn? WAY?



[Log in to Reply]  [No Email]
Dale2

10-05-2019 10:10:08




Report to Moderator
 Re: for Bern in reply to WayneIA, 10-05-2019 06:56:49  
yes the accessory plate is turned half way around and gasket is blocking the holes, like the I T manual describes.



[Log in to Reply]  [No Email]
sotxbill

10-05-2019 06:26:23




Report to Moderator
 Re: for Bern in reply to Dale2, 10-04-2019 20:32:25  
unload valve/relief valve sticking open due to rust ring..



[Log in to Reply]  [No Email]
Dale2

10-05-2019 10:14:36




Report to Moderator
 Re: for Bern in reply to sotxbill, 10-05-2019 06:26:23  
where would I find those valves located



[Log in to Reply]  [No Email]
Bern

10-05-2019 10:23:26




Report to Moderator
 Re: for Bern in reply to Dale2, 10-05-2019 10:14:36  
The unload valve is located inside the lift cylinder piston assembly, and is the first thing I'd suspect if it doesn't lift at all when you know that you have pump flow. The IT manual should show you where it is.



[Log in to Reply]  [No Email]
Dale2

10-05-2019 11:02:44




Report to Moderator
 Re: for Bern in reply to Bern, 10-05-2019 10:23:26  
Bern have you ever seen the o rings between the transmission and the lift compartment fail? I have found air bubbles are always in the pump output



[Log in to Reply]  [No Email]
Bern

10-05-2019 15:30:45




Report to Moderator
 Re: for Bern in reply to Dale2, 10-05-2019 11:02:44  
I doubt that the o-rings have failed, since they are static. I myself would be looking for air leaks in the inlet tubing above the oil level, specifically any cracks in the pipe or manifold itself.

Or, it's possible that the seal in the pump you replaced somehow got damaged on installation? That could certainly cause it to suck air.



[Log in to Reply]  [No Email]
Dale2

10-05-2019 18:00:34




Report to Moderator
 Re: for Bern in reply to Bern, 10-05-2019 15:30:45  
Bern thank you and everyone else for their comments. I took the pump back apart and found I did not seat the seal fully. Fixed that and the pump primed up and the lift is working. So now to wait a few days and make sure the pump does not loose prime. That is the problem I was trying to fix in the beginning.
Thanks to all
Dale



[Log in to Reply]  [No Email]
Bern

10-06-2019 07:02:38




Report to Moderator
 Re: for Bern in reply to Dale2, 10-05-2019 18:00:34  
Thanks for the feedback. Awaiting good news in your final report in a few days!



[Log in to Reply]  [No Email]
Dale2

10-05-2019 15:46:49




Report to Moderator
 Re: for Bern in reply to Bern, 10-05-2019 15:30:45  
Thanks Bern Yes the seal could be leaking as I remember there was ascratch in the housing where the seal sat.



[Log in to Reply]  [No Email]
Dale2

10-05-2019 05:18:19




Report to Moderator
 Re: for Bern in reply to Dale2, 10-04-2019 20:32:25  
The lift will not even try to work. The tractor has set for about 4 years.
Thanks for your thoughts.



[Log in to Reply]  [No Email]
Bern

10-05-2019 05:02:45




Report to Moderator
 Re: for Bern in reply to Dale2, 10-04-2019 20:32:25  
That's a head scratcher right there. If the relief valve was at fault, I don't think the pressure would drop to zero. That said, pre 1965 tractors are not my area of expertise.

Have you tried operating the tractor normally to see how it performs?



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

Hop to:


TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). We have the parts you need to repair your tractor - the right parts. Our fast shipping, low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2019 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