(800) 853-2651
SHOP NOW

JD500A Brake/Hydraulic Problem

A

Anonymous-0

Well-known Member
HELP!!!
My left brake locked up due to a torn boot on the brake valve. I rebuilt the brake valve and reinstalled it. When I starting the tractor my brake pedles became stiff and the seal blew on my hydraulic pump. Did I do something wrong with the brake valve rebuild or is it just a coincidence the pump seal blew out.
Thanks for any advice.
 
IF I remember correctly, the brake reservoir is filled with fluid from the hydraulic pump, not pressurized. You probably created a new internal leak in the brake valve. THAT sent oil back the wrong way and pushed out the pump seal.
The hydraulic pump has close fitting parts, shaft to housing, to stop most oil from leaking. then there is a 4 sided seal to stop what oil leaks past there. Then there is the outside seal to keep the outer side of the shaft dry. There is a bleed tube to catch oil that is between the 4-sided ring, and the outer seal. That small bleed tube keeps the brake reservoir topped off. When the reservoir is full, extra oil goes back to the trans case.
 
It appears that the black tubing is causing the break cylinders to become pressurized forcing the pedals upward. I removed the pump and replaced the inner and outer seals but the inner seal quickly blew out again. I'm not sure if the brake cylinder was the cause of the problem or if the pump just happened to fail at the same time. I hate to replace the pump only to have it blow out due to a problem with the brakes.
Thanks for the help!!!
 
"That small bleed tube keeps the brake reservoir topped off. When the reservoir is full, extra oil goes back to the trans case."


WRONG WRONG WRONG...

There is NO brake reservoir, simply a brake valve.

The valve is fed line-pressure hydraulic oil and any slight leakage PLUS return oil when the brakes are released is simply "T'd" together with any oil from the main pump weep line and dumps into the maincase.
 
Guys,
I have a thread on the John Deere forum.
My son advises me it is impolite to post on 2 forums.
Sorry
 
You must log in or register to reply here.

Similar threads

S
Oliver 1650 - right brake
Replies
1
Views
170
greg krush
G
D
3010 gas
Replies
3
Views
436
dwag
D
D
Ford 3000 Hydraulic pressure problem
Replies
6
Views
479
TheOldHokie
TheOldHokie
S
2020 hydraulic pump leak from drive seal
Replies
10
Views
408
WTW
W
J
Ih 674 hydraulic problem
Replies
5
Views
480
Highwayman
H
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