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 

315 BL Cat excavator hydraulic question


 
Post new topic    
View previous topic :: View next topic  
Author Message
Circle K
Regular


Joined: 07 Apr 2014
Posts: 98


Report to Moderator

PostPosted: Tue Dec 19, 2017 4:10 am    Post subject: 315 BL Cat excavator hydraulic question Reply to specific post Reply with quote

Hello, I have a 315bl Cat excavator. My hydraulics have been slowing down some when the machine gets warmed up. Machine has a lot of hours so this isn?t a surprise for me, but as far as hydraulic filters, there?s the paper one on top of the hyd tank, and somebody was telling me there might be a strainer somewhere too to clean out? Anybody know about this? Thanks
 
Back to top
View user's profile
newhollandnut
Regular


Joined: 15 Apr 2014
Posts: 375
Location: southern indiana

Report to Moderator

PostPosted: Tue Dec 19, 2017 4:32 am    Post subject: Re: 315 BL Cat excavator hydraulic question Reply to specific post Reply with quote

Could be wrong here but if it is on top of the tank wouldn?t it just be a vent? Been a while since I?ve been around one but I thought the filters were either where the boom attaches to the machine or in the back right swing door
 
Back to top
View user's profile
AJ.
Tractor Expert


Joined: 20 Oct 2007
Posts: 1630
Location: UK

Report to Moderator

PostPosted: Tue Dec 19, 2017 5:52 pm    Post subject: Re: 315 BL Cat excavator hydraulic question Reply to specific post Reply with quote

That would be the breather filter,the machine has both a suction strainer in the tank as well as the main hydraulic filter,some had an element type and others had a spin on,the machine should have its filters serviced at regular intervals,slowing up when it's hot could be the o'rings on the main regulator valve body letting the oil bypass or the pump is getting to show its age,a service man and a pressure test is the way to go.
AJ
 
Back to top
View user's profile
jm.
Tractor Guru


Joined: 11 Apr 2010
Posts: 4537
Location: Dover Tenn.

Report to Moderator

PostPosted: Tue Dec 19, 2017 6:43 pm    Post subject: Re: 315 BL Cat excavator hydraulic question Reply to specific post Reply with quote

Getting weak when hot is a dead give away for pump getting weak, just can not pump that thinner oil as fast. There is a return filter in top of tank but think you are wasting time on the filters. Flow meter on the pump will prove it but takes more than some tractor place will need one with volume.
 
Back to top
View user's profile
NCWayne
Tractor Guru


Joined: 20 Jun 2007
Posts: 5001


Report to Moderator

PostPosted: Wed Dec 20, 2017 8:06 pm    Post subject: Re: 315 BL Cat excavator hydraulic question Reply to specific post Reply with quote

The return filter is in the tank. The suction strainer should be under the plate where the tank cap is, and it's nothing but a wire mesh strainer. I've never seen one of them that needed to be cleaned out unless the pump failed, and then it's usually cheaper and easier to just get a new one than to clean out the old one.

That said, it sounds like the pumps are getting weak as others have stated. Unfortunately the only way to check one of those pumps and get an accurate diagnosis is to use a flow meter with the ability to load the system. The ability to load forces the pumps to adjust to the higher pressure, lower flow condition which is what you need to see what's going on.
 
Back to top
View user's profile
SMOKINMAC
New User


Joined: 20 Dec 2017
Posts: 5


Report to Moderator

PostPosted: Thu Dec 21, 2017 7:36 am    Post subject: Re: 315 BL Cat excavator hydraulic question Reply to specific post Reply with quote

AJ.

I am trying to contact you direct with a question about a Liebherr 932. I noticed you helped another member, CASE450 with the same problem in the past.

The Pilot controls will go dead.
The Electric Safety Solenoid has been by-passed by directly plumbing the hydraulic Gear Pump line to the Pilot Control Line, so the Safety Circuit to the Left Control Arm is a NON-Issue.
Also, I have confirmed there is pressure from the Pilot System Gear Pump.

What I would like to know is, Is there other cut-0ff valves in the pilot system. For example is there an Engine Oil pressure, or Temperature, or Air pressure sensor(s) connected to another valve somewhere? OR what else should i be looking for that would cause the pilot system to loose hydraulic pressure?

Greatly appreciate any help. Thanks
 
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