(800) 853-2651
SHOP NOW

856 with bad power steering, T/A

I

IH-Mitch

Member
On my 856 this past year the power steering was a lot harder to turn at a lower rpm, you have to run it a higher rpm to get the steering to work as it should. Also sometimes when i am driving it at a lower rpm it will just stop like i took it out of gear then it will kick in and jerk ahead. T/A and clutch all work fine. Hydraulic Remotes and 3pt all worked fine. Although when i pressed the brakes in i could feel the the brake petal gain pressure and lose pressure but it would always stop and lock the tires up.

I herd of a multiple control valve on the front pump that is common to blow gaskets between them, but i thought before i get into ripping stuff apart i would see what you guys think the problem is.

Thanks
 
Classic signs of the T/A and MCV pump going out. BTDT.
Hitch and remotes run off the rear pump in the rear frame.

Have you checked the fluid level and changed the hyd filter? If you haven't, try it, you just MIGHT get lucky.
 
Yes i keep the level full, and i change the hydraulic filter. There is just one main filter right? or is there another?

Thanks
 
You have the classic symptoms of a worn out MCV pump. You may as well just pull the MCV assembly. The pump is mounted on the inside of that assembly. You can check for blown O-rings between the pump and MCV and the MCV and center housing. If the O-rings are OK go ahead and replace the pump.

An unseen side affect of this problem is that you are starving the range transmission and ring gear/pinion of lube oil. The excess oil from the MCV pump goes through the oil cooler and then to the rear frame for lubrication there. The steering gets priority on the first three gallons of flow. If you do not have enough to satisfy the steering demand there will be no flow to the rear. Running with a weak MCV pump can lead to range transmssion and differential failures.
 
You must log in or register to reply here.

Similar threads

C
856 hydraulics
Replies
4
Views
209
caterpillar guy
C
M
450 power steering unit
Replies
2
Views
523
Mike Fitz
M
P
350 U. Rethinking the 1 way power steering
Replies
3
Views
297
Janicholson
Janicholson
J
Farmall 504D Steering Wheel Vibration
Replies
9
Views
270
Janicholson
Janicholson
T
Case-IH 895 steering question.
Replies
15
Views
414
Texasmark
T
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