Yesterday's Tractor Co. Restoration Quality Tractor Parts
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Tractor Manuals
Tractor Parts
Classified Ads
Photo Ads

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
Classic Trucks
Kountry Life
Enter your email address to receive our newsletter!

subscribe
unsubscribe
  
Ford Tractors Discussion Forum
Show Parts for Model:

660 hydraulics

Author  [Modern View]
Billybuck

04-27-2014 20:26:43
70.192.201.36



Report to Moderator

Arrived at the farm to do some mowing. No lift action. Looked through the differential fill port. Oil streaming back from the seam of the lift cover and auxiliary plate. O'ring(s) the likely culprit?




[Reply]   [No Email]
Billybuck

04-29-2014 04:08:55
70.192.199.134



Report to Moderator
 Re: 660 hydraulics in reply to mhb@ufe, 04-27-2014 20:26:43  
Quoting Removed, click Modern View to see

Since I replaced the safety valve last August and will do so again now, and hope it solves the problem, is there anything I should do to troubleshoot the cause of pressure build up? Seems if these safety valves can fail by staying open they could fail by not opening. Then what happens?



[Reply]  [No Email]
JMOR

04-29-2014 05:25:10
72.181.173.171



Report to Moderator
 Re: 660 hydraulics in reply to Billybuck, 04-29-2014 04:08:55  

Billybuck said: (quoted from post at 07:08:55 04/29/14)
JMOR said: (quoted from post at 03:01:14 04/29/14)
Billybuck said: (quoted from post at 21:56:59 04/28/14) Jesse, you may recall I just replaced the cylinder safety valve
last Fall. Should the safety valve even open if there is not a
problem causing excessive pressure? The source looks to be
from the same spot as last fall though it was shooting out
probably because I had a bush hog attached when trying to lift.
No it should not open. It is only one of 3 sources that potentially dump back through the same un-gasketed path.


Since I replaced the safety valve last August and will do so again now, and hope it solves the problem, is there anything I should do to troubleshoot the cause of pressure build up? Seems if these safety valves can fail by staying open they could fail by not opening. Then what happens?
The ram cylinder safety valve in question is there to relieve excess pressure that occurs when the operator has a heavy disk or such lifted & runs too fast across furrowed ground, resulting in shock loading & high pressures caused by the bouncing of disk on 3 point. Zane speaks of the cylinder being ruptured on N tractor by this. This valve opening pressure is 2700 PSI, well above the 2000 PSI normal operating system pressure. A tractor could go a lifetime & never crack this valve. Once opened, it may trap trash on closing & leak. It should be very easy to verify such by removing & applying compressed air & feel/listen for a leak through the valve. If it leaks at 100-150 PSI, it has a problem. If mine, I would apply air pressure at test port on top of accessory plate & see if lift arms rise AND look and listen for leaks at this time. Under these conditions there is very little of the system exposed to pressure.......a few o-rings lift cover to acc plate & same to ram cylinder, the ram cyl safety valve, the check valve, control valve dump path and the ram cyl itself. If all OK, move forward with other checks. If not, you will have isolated the leak or at the very least isolated the search area.
This post was edited by JMOR at 05:28:12 04/29/14.

[Reply]  [No Email]
Billybuck

04-29-2014 13:58:11
70.192.203.22



Report to Moderator
 Re: 660 hydraulics in reply to JMOR, 04-29-2014 05:25:10  
My accessory plate has a valve built into it. Will that affect access to the test port?



[Reply]  [No Email]
JMOR

04-29-2014 15:47:59
72.181.173.171



Report to Moderator
 Re: 660 hydraulics in reply to Billybuck, 04-29-2014 13:58:11  
Quoting Removed, click Modern View to seeAny 'accessory plate' that isn't the simple factory plate is wide open for what it is, so just set that valve to whatever position you would use when you want to use the 3 point and try it or send me information/picture of it.



[Reply]  [No Email]
Billybuck

04-29-2014 19:18:10
70.192.203.22



Report to Moderator
 Re: 660 hydraulics in reply to JMOR, 04-29-2014 15:47:59  
It will be a week from Saturday before I get back to it. I'll probably take the compressor and replace the safety valve again hoping that's the fix and try the air test if not. I'll message you a photo of the auxiliary plate if necessary. Thanks.



[Reply]  [No Email]
JMOR

04-29-2014 19:25:21
72.181.173.171



Report to Moderator
 Re: 660 hydraulics in reply to Billybuck, 04-29-2014 19:18:10  
Quoting Removed, click Modern View to seesure. Like to see it.



[Reply]  [No Email]
Billybuck

04-28-2014 04:12:18
70.192.201.36



Report to Moderator
 Re: 660 hydraulics in reply to Billybuck, 04-27-2014 20:26:43  
Duh, see what you mean Jesse. This is internal. Looking at the manual, it appears to be coming through the seam between the cylinder housing where the safety valve is located and the lift cover. I think this may be the same thing I just dealt with 6 months ago but not "spraying" this time as it was then.



[Reply]  [No Email]
JMOR

04-28-2014 05:03:03
72.181.173.171



Report to Moderator
 Re: 660 hydraulics in reply to Billybuck, 04-28-2014 04:12:18  

Billybuck said: (quoted from post at 07:12:18 04/28/14) Duh, see what you mean Jesse. This is internal. Looking at the manual, it appears to be coming through the seam between the cylinder housing where the safety valve is located and the lift cover. I think this may be the same thing I just dealt with 6 months ago but not "spraying" this time as it was then.
That ram cylinder safety valve under the accessory plate/down in the big hole is shown in the I&T manual to dump into the exhaust tube along with the back pressure via unloader valve, BUT those dump paths, unlike all the other connections between the ram/valve body casting & lift cover, have no sealing such as O-ring or gasket, so it seems free to leak to me & I guess it wouldn't matter as it dumps back into bottom of hyd cavity any way. I might expect your "leak" to be from back pressure/unloader when in unloading )hold or lower, but not lift) or from ram cyl safety during attempted lift if it is stuck open.
This post was edited by JMOR at 05:22:29 04/28/14.

[Reply]  [No Email]
Billybuck

04-28-2014 18:56:59
70.192.199.134



Report to Moderator
 Re: 660 hydraulics in reply to JMOR, 04-28-2014 05:03:03  
Jesse, you may recall I just replaced the cylinder safety valve last Fall. Should the safety valve even open if there is not a problem causing excessive pressure? The source looks to be from the same spot as last fall though it was shooting out probably because I had a bush hog attached when trying to lift.



[Reply]  [No Email]
JMOR

04-28-2014 19:01:14
72.181.173.171



Report to Moderator
 Re: 660 hydraulics in reply to Billybuck, 04-28-2014 18:56:59  
Quoting Removed, click Modern View to seeNo it should not open. It is only one of 3 sources that potentially dump back through the same un-gasketed path.



[Reply]  [No Email]
JMOR

04-27-2014 21:27:57
72.181.173.171



Report to Moderator
 Re: 660 hydraulics in reply to Billybuck, 04-27-2014 20:26:43  
Quoting Removed, click Modern View to see"Looked

through the differential fill port. Oil streaming back from the

seam of the lift cover and auxiliary plate."

Don't understand, as first sentence would imply leak is under lift cover & inside hyd cavity, but second sentence would be an external or on top of lift cover leak????



[Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Add a Reply]

Hop to:
TRACTOR   PARTS TRACTOR   MANUALS
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 ]

Home  |  Forums


Copyright © 1997-2014 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