Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Discussion Forum
:

JD420 U

Welcome Guest, Log in or Register
Author 
S Putnam

01-14-2002 18:43:56




Report to Moderator

My tractor RPM surges at all throttle settings other than full throttle. Is this normal?




[Log in to Reply]   [No Email]
Tony

01-15-2002 10:43:44




Report to Moderator
 Re: JD420 U in reply to S Putnam, 01-14-2002 18:43:56  
First off, if you haven't, Adjust your 'power screw' or high speed screw a little at a time, first out by 1/2 a turn. Continue until engine smoothes out. If not, of course turn in. More than likely it will shut the engine off. If neither of previous works carburetor must be rebuilt. Very, Very Simple carb to work on.

If confident, that its not the carb, check the govenor adjustment. First get new springs and replace all rod/linkage ends that are worn out. Most of the time loose control linkages only increase the problem.

Last but not least. On most if not all govenors there is a thing called a bump screw. It removes the HUNTING/SURGING out of the engine. In your manual it will tell you where it is and how to adjust.

[Log in to Reply]  [No Email]
MERRILL

01-14-2002 19:28:22




Report to Moderator
 Re: JD420 U in reply to S Putnam, 01-14-2002 18:43:56  
WHAT DO YOU MEAN BY A SURGE 10,20,30,40,50+ RPM? THAY NEVER MAINTAIN A CONSTANCE RPM THAY TEND TO VERY A LITTLE ESPECIALY WHEN COLD. I WOULD INSURE EVERYTHING IS SET PER THE MANUAL, MAKE SURE YOU GOT GOOD GAS. MERRILL



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


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. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 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