|
Tractor Talk Discussion Board |
4430 Jerky hydraulics
[ Expand ] [ View Replies ] [ Add a Reply ] [ Return to Forum ]
Posted by 9500hp on October 26, 2006 at 07:46:30 from (199.152.136.244):
Have a 1975 John Deere 4430 tractor that has great steering and brakes, but the SCV hydraulics and 3pt are very jery when oil is hot or cold. The hyd fluid level is good, screen is clean, hyd filter is new, replaced the charge pump with a new JD HI capacity one, pump drive shaft is good, JD rebuilt the hydraulic pump(new stroke control valve and orings), replaced the priority valve and the hydraulics are STILL jerky. When I put a gauge in the SCV the pressure jumps from 2300 down to 1800 at 1800RPMs. The SCV and 3pt will not hardly work at RPMs under 1200. Any advice would be helpful. THANKS, MARK
Replies:
Home
| Forums
Today's Featured Article -
Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[More Ads]
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 HeadquartersWebsite Accessibility Policy |
|
