Yesterday's Tractor Co. Parts for Farm Tractors - Compare our Prices!
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Major engine hunts when cold


 
Post new topic    
View previous topic :: View next topic  
Author Message
David Lewis
Regular


Joined: 26 Sep 1998
Posts: 110


Report to Moderator

PostPosted: Sat Apr 02, 2011 5:47 pm    Post subject: Major engine hunts when cold Reply to specific post Reply with quote

1954 Major runs well, but the engine revs up and down when it is cold, and then evens out when warmed up. Feels like air is getting in somewhere, so went through the system last year and found no leaks. Did the diaphragm test and it seems OK. So what can I try now?
 
Back to top
View user's profile
tiresntracks
Long Time User


Joined: 20 Feb 2007
Posts: 527


Report to Moderator

PostPosted: Sat Apr 02, 2011 9:32 pm    Post subject: Re: Major engine hunts when cold Reply to specific post Reply with quote

It sounds like the damping valve in the vacuum governor may be broken.
 
Back to top
View user's profile
David Lewis
Regular


Joined: 26 Sep 1998
Posts: 110


Report to Moderator

PostPosted: Sun Apr 03, 2011 2:22 am    Post subject: Re: Major engine hunts when cold Reply to specific post Reply with quote

Interesting. Guess I can look that up in my parts book and then go take a look and see. Thanks for your help.
 
Back to top
View user's profile
mick richman
Guest






Report to Moderator

PostPosted: Sun Apr 03, 2011 3:42 am    Post subject: Re: Major engine hunts when cold Reply to specific post Reply with quote

Had the same problem. Ended up partly dismantling the fuel pump and found the diaphragm was split. Not too hard to get out except for the fourth bolt.
 
Back to top
David Lewis
Regular


Joined: 26 Sep 1998
Posts: 110


Report to Moderator

PostPosted: Sun Apr 03, 2011 4:17 am    Post subject: Re: Major engine hunts when cold Reply to specific post Reply with quote

That makes sense, because it stops hunting at very low idle, i.e. is getting enough diesel when it only needs a little. Will check it out. Thanks.
 
Back to top
View user's profile
richard bartlett
Regular


Joined: 13 Mar 2010
Posts: 32


Report to Moderator

PostPosted: Mon Apr 04, 2011 9:34 am    Post subject: Re: Major engine hunts when cold Reply to specific post Reply with quote

just another thought, mine's a 1955 FMD and had similar problem, the diaphram was split so replaced it but I also discovered one of the two pipes that run from the top of the diaphram housing to the manifold had been rubbing on the engine block and had a hole worn in it.
 
Back to top
View user's profile
David Lewis
Regular


Joined: 26 Sep 1998
Posts: 110


Report to Moderator

PostPosted: Mon Apr 04, 2011 12:46 pm    Post subject: Re: Major engine hunts when cold Reply to specific post Reply with quote

Thanks for the idea. I thought cracked pipes might be the prolem last year, so I tested them and they are OK. So I suspect it's vacuum pump diaphragm or fuel pump diaphragm - both easy fixes (if I get lucky).
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> Fordson All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
TRACTOR   PARTS TRACTOR   MANUALS
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651.

YT Home  |  Forums Home

Copyright © 1997-2014 Yesterday's Tractor Co.

Powered by phpBB © 2001, 2005 phpBB Group

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