Posted by JD Seller on July 02, 2016 at 21:09:21 from (208.126.198.123):
Well I am just about to admit to surrender on this darn JD 4020 gas. I have been using it this week. Nothing heavy just general barn yard type of stuff. It has been running great. Kind of nice to use.
So this morning I needed to go over to an out of town land lords place and do some bush hogging for him. So I decided to take the JD 4020 gas as it also has a loader on it and some times there is brush that needs shoved out of the way. We worked all morning and it ran great. Took throttle and ran smooth. At lunch time the landlord's wife had some sandwiches made for us. So I shut the tractor off to eat lunch and I also wanted to adjust the clutch free travel as it was a little too tight. Went to restart the tractor and it just about did not start. Just about cranked the batteries dead before it started. As soon as it did start it was missing. You had to give it throttle real slow or it would start to stumble and backfire. I tried to identify if it was one cylinder missing. It is not. The plugs are not black with carbon, they are white. I fooled with it for a short while and finally had him run me home. I loaded up the JD 6400 on the trailer and went an finished the mowing for him.
After I was all done and had hauled the JD 6400 home, the JD 4020 gas started right up when I went to load it on the trailer. It misses bad enough it will not pull itself in road gear. I let it run while I hauled it home. When I got home it was running a little better and would take throttle but it still has a random miss fire. I fooled with it for an hour or two this evening. I am pretty sure it is an ignition problem. I am leaning towards a bad coil. It has been switched over to an electronic system. It has one of those yellow coils on it. Do any of you know if I have to use the electronic ignition manufacture's coil??? can I just use a regular coil?? The reason I am asking I do not want to harm the electronic system with the wrong coil but I am not sure that the coil is the trouble. It is missing under load when trying to increase RPMs. Everything else check out. Plugs are good, wires are good, tried another known good distributor cap, Compression test and leak down test both show the motor as being good. So it just about has to be the coil or the trigger assembly.
If any of you have a better idea I am very open to subjections on this thing.
P.S. Checked the valve setting last week before tearing into the carburetor.
Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
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 - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
... [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]
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.
