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.

MF35 Fuel filter breather
:

is it necessary?

Welcome Guest, Log in or Register
Author 
Laurence

04-15-2003 21:12:37




Report to Moderator

I am in the process of changing the engine of a MF35 from 4-cylinder gas to 3-cyl diesel. I got all the necessary parts from a local used spares dealer. The double diesel filter supplied has its breather pipe pinched shut. Is this breather necessary - with it shut where would the excess fuel go, but with it connected to the fuel tank won't too much fuel run back to the tank with too little pressure for the injector pump?

[Log in to Reply]   [No Email]
Nigel

04-16-2003 05:14:42




Report to Moderator
 Re: MF35 Fuel filter breather - is it necessary? in reply to Laurence, 04-15-2003 21:12:37  
The fuel bleed line from the filter head is to bleed small amounts of air that may be in the fuel system. The banjo bolt securing the line to the filter head should have a restriction built into it. The lift pump used by MF will only pump about 5 PSI then goes into stand-by mode automatically. You can feel this occur as you hand prime the pump. Hence the answer to your question is no, but you may have difficulty bleeding air from system.

[Log in to Reply]  [No Email]
David

04-16-2003 03:03:06




Report to Moderator
 Re: MF35 Fuel filter breather - is it necessary? in reply to Laurence, 04-15-2003 21:12:37  
I think you will need to connect it. I recently test ran a 3-cylinder with my thumb over the leakback pipe and it was ok but I doubt this would be satisfactory for longer term. One function of filter leakback is to allow air bubbles to bleed out of system back to tank. I think it would also create a back pressure that the lift pump might not like if it was closed off. The system also feeds fuel to the reservoir on the back of the tank that, in turn, feeds the manifold heater plug (which you won't need to use unless you're in a very cold climate)

Appears that restriction of pipe diameter is sufficient to create a back pressure high enough to feed fuel into the injection pump. Leakback is not under pressure so a suitable fuel resistant rubber tube does the job if you need to join two cut ends of pipe to make the connection.

[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