Charles, I have some very limited experience in dealing with those steering issues.
I think the high pitched whine when nothing is being operated is usually associated with the high pressure flowing past a popoff/check valve somewhere at the rated psi of the check valve.
There is also a different whine associated with the operation of the hydraulics (such as a loader) which could be a cavitation (a pulsating noise) or groan from lack of fluid such as a plugged filter, low fluid level, or cold weather/fluid that is too cold to flow, a suction leak, leaking seal in the pump area, etc.
I'd first suspect that someone adjusted the flow divider to push more fluid to the power steering with the old worn out 12 gpm pump. Now you are getting too much which fluid opening the bypass on the power steering.
If your attempt to adjust the middle screw on the flow divider doesn't fix it, then you could have something plugging up the system from the power steering forward or a bad check ball/valve. Look under the seat for the check valve that is there. There may be another where the power steering line goes to the oil cooler if you have that on yours.
I think that flow divider adjustment screw may shut if off completely to the power steering which would help evaluate it.
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. [ About Us ]
Today's Featured Article - Ford N-Series Transmission/Hydraulic Fluid - The Full Story - by Llamas. The transmission fluid in an “N”:-series tractor lubricates the transmission, differential, rear wheel bearings, PTO and hydraulic pump drive, and it also cats as the working fluid for the hydraulic lift. In 9N/2N models, it also lubricates the steering sector and shaft system. The owner’s manual for the 9N and 2N models specified the use of only two fluids. They were STRAIGHT MINERAL OIL SAE 90 (above freezing) and
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
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.