Posted by KEH on August 08, 2008 at 10:07:37 from (64.53.72.138):
JD 4020 hydraulics. This is news to me but I have never owned a JD as late a model as a 4020. This question and answer is from the Aug. issue of the Progressive Farmer. Writer said after turning off his 4020 to fuel it, the starter would spin slowly and then spin faster. Answer was that the 4020 has a closed center hydraulic system which maintains 2000 pounds of standby pressure. When there is no hydraulic demand, the pump does not pump oil and so requires very little hp to turn. When tractor was cut off for fueling, the tractor is at standby pressure. During the time spent fueling, the pressure leaks down some. When the starter is engaged, the pump tries to restore the lost pressure. Before the tractor starts, standby pressure is reached and the pump stops pumping(going out of stroke it is called) and the starter can spin the tractor faster. Some people jerk the steering wheel back and forth when starting which dumps hydraulic pressure making the tractor easier to start.
Question on another subject: I have been told that those rattle devices with a flat plastic container on the end of a handle work better at driving cattle than a hot shot. What is the reason given by for them working to drive cattle?
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 - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[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.
