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 

fordson f bore size and pistion clearances.


 
Post new topic    
View previous topic :: View next topic  
Author Message
doug12
Regular


Joined: 22 Jan 2011
Posts: 33


Report to Moderator

PostPosted: Sun Oct 21, 2012 10:21 am    Post subject: fordson f bore size and pistion clearances. Reply to specific post Reply with quote

I am in the process of restoring a early 20s fordson f. I am disassembling the engine and got the pistons removed. I measured the bore at 4.012. What should the the bore be? What is the maximun piston/ bore clearance that will allow for good compression? My feelings is I am going to have to have the engine bored and sleeved.

Any infomation is much appreciated.
 
Back to top
View user's profile
cdmn
Regular


Joined: 07 Aug 2011
Posts: 142


Report to Moderator

PostPosted: Mon Oct 22, 2012 6:58 pm    Post subject: Re: fordson f bore size and pistion clearances. Reply to specific post Reply with quote

The first 10 years of Fordson, the Std bore was 4.000 inches.

Beginning in about 1929, the Fordson had a slightly larger bore, 4.125.

In 1938 it got a higher compression head. The result was that the bearings were over-stressed and the engine suffered reliability.

So the conclusion is, the stock Fordson is barely adequate.

By 1945, they were getting 27 hp out of it.

To go non-stock takes money: hardened, counterbalanced crank, bearing inserts, pressurized lubrication, stronger rods.

People are doing it with Model T or Model A engines.
 
Back to top
View user's profile
cdmn
Regular


Joined: 07 Aug 2011
Posts: 142


Report to Moderator

PostPosted: Wed Oct 24, 2012 10:21 am    Post subject: Re: fordson f bore size and pistion clearances. Reply to specific post Reply with quote

It seems like if you can get the taper removed, a .010 oversized piston and rings would do it.
If necessary, a rebore of .020 oversize would clean it up.
Piston clearance of 0.005 on the diameter is what they recommend for Model T's. It may depend on the metal in the piston. Rings are fitted with a gap at the ends, to allow for thermal expansion.

Should be no need to resleeve.

In most engineering, the hole is basic. Clearance is built into the piston.

Modern piston rings would be much improved over the old style iron rings. For parade purposes, you may not need to do anything.
 
Back to top
View user's profile
Butch Howe
Guest






Report to Moderator

PostPosted: Fri Oct 26, 2012 7:57 pm    Post subject: Re: fordson f bore size and pistion clearances. Reply to specific post Reply with quote


Like I said on the Smokstak. Put cast rings in it and run it.
 
Back to top
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