(800) 853-2651
SHOP NOW

300u hydraulics all messed up

A

antique hay co

New User
Where to even start. Rear hydraulics have been getting progressively worse the past year. Decided to do something about it. I have replaced filter screen in resevoir, cleaned little screen in pressure relief valve. New hy-trans fluid. I have even taken pump apart and inspected it. New seals in pump. Now after all that... I have no lift whatsoever. After each of the previous steps i had a hard time getting pump to prime and build enough pressure to operate lift. But eventually it always did. Not this time. I'm stumped, I'm oily, and I'm frustrated! Any comments or suggestions please.
 
I'm not real familiar with your model of tractor, but what type of hydraulic pump does it use? You might have to rebuild the whole pump with new springs, etc. depending upon what you have. I had to do this once with my tractor and it solved the problem real well -- going on a decade now with strong hydraulics.

Good luck and report back with your solution so that we can learn about what works.

Harold
 
Did you check the clearances in the pump when you had it apart? Sounds like the gears may be worn and after putting it back together it is unable to prime itself. Roger
 
Drive the front tires into a ditch 18 inches below the rear. Use an air fitting on the reservoir (Vent unit hole with schrader (valve stem) valve adapted. use a tire pump, or regulated air pressure to put a max of 20 PSI in the reservoir. start it and work the valves and steering (if power). Best of luck. Jim
 
I did not check clearances on the pump. Don't understand how a pump wears out after only 60 years! It will build pressure but it takes a long time. Every time it sits for awhile she takes forever to build pressure again
 
If the tip of gear to housing is more than .002" it will not be very powerful. Cleaning the screen and making the system checks you have should help.
An air leak on the suction side will also let it drop prime, and be slow. Jim
 
You must log in or register to reply here.

Similar threads

A
Bad Hydraulic Pump vs Bad rockshaft seals
Replies
2
Views
259
AjoeyH
A
W
JD 45 combine fuel pump won't prime.
Replies
7
Views
392
Jim.ME
J
S
Farmall C and the Char-Lynn hydraulic pac
Replies
3
Views
375
caterpillar guy
C
B
Ford 420 No fuel to injectors
2
Replies
21
Views
691
Dieseltech
D
E
NAA Hydraulics
Replies
1
Views
414
JMOR
J
Tractor Parts Tractor Manuals

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

Back
Top