(800) 853-2651
SHOP NOW

Hydro charge circuit pressure question hydro expert needed

T

Tbone8

Member
Ok, on my 1066 Hydro, at low rpm the tractor seems to go fine. At higher rpm the tractor begins to slow down and if I back off the throttle, it picks power back up. The servo control pressure is good in neutral and drive. The charge circuit pressure in neutral is about 500 psi. In drive, it is about 50 psi. It should be 170-215 psi in drive. According to the manual, if low pressure in drive only, it could be the min regulating valve in the multi valve. There are no o-rings or anything in that valve. So, could it be a busted spring or something in the valve or is it more likely the charge pump is bad? It would seem to me if the neutral pressure is a healthy 500 psi, the charge pump should be good??? Hopefully someone will give me some direction on this...
Tom
 
Is the charge pressure the same in both forward and reverse?

With the hydro in neutral there is no flow though the center section so there is no flow directed to the minimum pressure valve. The maximum pressure valve controls the pressure. When in neutral or reverse there is flow through the center section and returns to the multi valve and pressure is controlled by the minimum pressure valve. If the problem is in the minimum pressure valve the pressure should be same in both forward and reverse. If the pressures are not the same the problem may be a leak in the forward high pressure circuit.

If there is a problem with the charge pump you might also have problems with steering, especially at low idle speeds.
 
Owen,
Yes, the pressure is the same in forward and reverse. Steering seems to be good. Pressure in both directions is about 50 psi. Minimum pressure valve? Thanks a bunch Owen!
 
You must log in or register to reply here.

Similar threads

K
international 656 hydro deceleration valve question
Replies
1
Views
192
tstoub77
T
E
IH 3414 Hydro Help
Replies
3
Views
496
Mike(NEOhio)
M
H
Hydro 100 steering problems
Replies
3
Views
235
Paul swpa
P
B
806 MCV Pressures and steering part 3
Replies
4
Views
317
Bluegill2
B
J
8n oil pressure relief valve plunger view
Replies
13
Views
327
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