Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile    Log inLog in 

LIEBHERR 932 Pilot Circuit Down


 
Post new topic    
View previous topic :: View next topic  
Author Message
SMOKINMAC
New User


Joined: 20 Dec 2017
Posts: 5


Report to Moderator

PostPosted: Wed Dec 20, 2017 1:40 pm    Post subject: LIEBHERR 932 Pilot Circuit Down Reply to specific post Reply with quote

Please Help!
The Pilot hydraulic system is not working.
The Safety Solenoid Cut OFF is not the issue, it has been by-passed, and there is hydraulic pressure on the pilot line leaving the Pilot Gear Pump.

My Question is, IS there any other cut-offs, either Electric Solenoid, or Air, etc in the pilot system. Looking for any other shut-offs down stream of the Gear Pump.

The Hydraulic Pilot Control System will go dead for no apparent reason and this time it will not come back to life, looking for causes.

Would greatly appreciate any help. Thanks
 
Back to top
View user's profile
markct
Tractor Expert


Joined: 05 Feb 2003
Posts: 2497


Report to Moderator

PostPosted: Wed Dec 20, 2017 2:33 pm    Post subject: Re: LIEBHERR 932 Pilot Circuit Down Reply to specific post Reply with quote

When you say the safety solenoid cutoff
I assume you mean the armrest or stick
by the door, when you say bypassed how
so are you talking, bypassed the switch
and direct wired the solenoid to be live
always, or physically removed it. If
electrical bypassed it there's a good
chance the solenoid failed or jammed.
 
Back to top
View user's profile
NCWayne
Tractor Guru


Joined: 20 Jun 2007
Posts: 5020


Report to Moderator

PostPosted: Wed Dec 20, 2017 8:00 pm    Post subject: Re: LIEBHERR 932 Pilot Circuit Down Reply to specific post Reply with quote

I'm not that familiar with Liebherrs but given general knowledge on various other brands, I've got to agree with Markct. If it has an electric solenoid valve simply bypassing the switch that turns it on doesn't insure it is actually going to work. I'd almost bet the coil has burned out and the valve isn't actually working. Unfortunately there's probably no way to bypass the actual valve completely as they are typically part of a larger valve body. Good luck.
 
Back to top
View user's profile
SMOKINMAC
New User


Joined: 20 Dec 2017
Posts: 5


Report to Moderator

PostPosted: Thu Dec 21, 2017 6:53 am    Post subject: Re: LIEBHERR 932 Pilot Circuit Down Reply to specific post Reply with quote


The Solenoid Valve itself has been by-passed / removed from the system. Hydraulic line goes direct from Gear pump to Pilot Line.

Looking for any other electric or air valves in the pilot system that would shut it down. Say a Oil pressure sensor circuit, Temperature circuit, etc. Thanks
 
Back to top
View user's profile
NCWayne
Tractor Guru


Joined: 20 Jun 2007
Posts: 5020


Report to Moderator

PostPosted: Fri Dec 22, 2017 5:08 pm    Post subject: Re: LIEBHERR 932 Pilot Circuit Down Reply to specific post Reply with quote

The only thing I can think of that would cause the circuit to go dead would be either the pump stops putting out, or the there is a pilot system relief that's popping and causing the pressure to drop. Beyond that, sorry, but I don't know what else to tell you.
 
Back to top
View user's profile
markct
Tractor Expert


Joined: 05 Feb 2003
Posts: 2497


Report to Moderator

PostPosted: Sat Dec 23, 2017 8:02 am    Post subject: Re: LIEBHERR 932 Pilot Circuit Down Reply to specific post Reply with quote

Ok you say it goes to the pilot line,
where's that go? Directly to the
controls? Have you checked for flow and
pressure at the joysticks? Also for flow
to return? Many pilot systems have a
small "stone" filter before the
joysticks. Also there should be a relief
and or regulating valve in the circuit,
usually incorporated with the solenoid
valve but could be separate. Did someone
remove that as well?
 
Back to top
View user's profile
SMOKINMAC
New User


Joined: 20 Dec 2017
Posts: 5


Report to Moderator

PostPosted: Mon Dec 25, 2017 12:36 pm    Post subject: Re: LIEBHERR 932 Pilot Circuit Down Reply to specific post Reply with quote

CVPost-markct wrote:
(quoted from post at 14:02:07 12/23/17) Ok you say it goes to the pilot line,
where's that go? Directly to the
controls? Have you checked for flow and
pressure at the joysticks?

Also for flow
to return? Many pilot systems have a
small "stone" filter before the
joysticks. Also there should be a relief
and or regulating valve in the circuit,
usually incorporated with the solenoid
valve but could be separate.

Did someone
remove that as well?



[/b]1. No pressure at Joysticks
2. No other mods to system.
3. I am wondering if a check valve or Relief valve in the control circuit has failed. If a relief valve then that is siphoning off the pressure, or if a check valve not as sure how this wold affect circuit. I wonder if a check valve could fail where it blocks flow in the INTENDED direction??

Thanks for your replies and help.
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> Crawlers, Dozers, Loaders and Backhoes All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  

TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). 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. [ About Us ]

YT Home  |  Forums

Modern View Forum powered by phpBB © 2001, 2005 phpBB Group

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