I have an International 444 with an international 2050 loader with a front end mounted hydraulic pump. I had water in my hydraulic fluid and I flushed the system out with diesel fuel based off of someones directions in a forum I had read on here. Prior to flushing the hydraulic system the hydraulics would wine like there was air in the lines. Now my problem is that the hydraulic pump is not pumping the fluid at all. I removed the pump and it seems to have nothing wrong with it. Is there a way to prime these type of pumps? We tried pouring hydraulic fluid into one of the lines but that didn't seem to help. There is no plug on my pump to pour hydraulic fluid into to prime it. Not sure what is wrong...anyone have any ideas? Like I said the pump appears to be ok when I took it apart, there was no apparent wearing or anything broken....I am at a loss...thank you for your help in advance!
- Thread starter rohde7
- Start date
Steve@Advance
Well-known Member
Any chance the pump got turned over so the suction side is now connected to the valve?
Or there is a leak in the suction line allowing air in the pump instead of drawing up oil.
If the pump is mounted above the oil level in the tank, it may be necessary to relieve the pressure upstream of the pump. Try loosening one of the cylinder lines, hold the valve as if extending the cylinder with the loose line while running the engine at fast speed. Be ready to release the valve, it will get messy!
Some gently applied air pressure (rag around a blow gun in the fill neck) will push oil to the running pump.
Or there is a leak in the suction line allowing air in the pump instead of drawing up oil.
If the pump is mounted above the oil level in the tank, it may be necessary to relieve the pressure upstream of the pump. Try loosening one of the cylinder lines, hold the valve as if extending the cylinder with the loose line while running the engine at fast speed. Be ready to release the valve, it will get messy!
Some gently applied air pressure (rag around a blow gun in the fill neck) will push oil to the running pump.
JimB2
Well-known Member
- Location
- Ottawa, Ontario, Canada
Hi, do you have two hydraulic hoses running under the seat from the front pump?
Which reservoir did you change the hydraulic fluid in? Under the seat? In the transmission/Differential? Did you fill the trans/Diff up until about 6" of the filler plug by the gear shift?
JimB
Which reservoir did you change the hydraulic fluid in? Under the seat? In the transmission/Differential? Did you fill the trans/Diff up until about 6" of the filler plug by the gear shift?
JimB
Janicholson
Well-known Member
Put 10 PSI into the reservoir to push oil to the pump., or drive it into a ditch or depression so the front is down about 16 inches or so. Be careful to not run it more than a few minutes
without putting some Hydraulic oil in the pump. It will be ruined. Jim
without putting some Hydraulic oil in the pump. It will be ruined. Jim
We dont know where you are from ? If it is a cold environment -- tell us if the hydraulic whine
just started or it was always there as you remember. Typically a sound like that (open center
system, gear pump) indicates that the intake feed(screen or what ever is used) is restricted. A
pump cavitating will make this noise. If it is cold where you are and you stated that you figured
you had water in the system -- I would say your intake was restricted with ice. If above freezing
and the likelihood of ice is not possible then your intake is restricted with some thing else.
Having the feed restricted will also greatly hamper getting the air out of the system after
changing oil/flushing the system. That being said some hydraulic systems have many unusual sounds
to them--- that is why I asked if this sound has always been there?
just started or it was always there as you remember. Typically a sound like that (open center
system, gear pump) indicates that the intake feed(screen or what ever is used) is restricted. A
pump cavitating will make this noise. If it is cold where you are and you stated that you figured
you had water in the system -- I would say your intake was restricted with ice. If above freezing
and the likelihood of ice is not possible then your intake is restricted with some thing else.
Having the feed restricted will also greatly hamper getting the air out of the system after
changing oil/flushing the system. That being said some hydraulic systems have many unusual sounds
to them--- that is why I asked if this sound has always been there?
Similar threads
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.
Copyright © 1997-2024 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