Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
Discussion Forum
Show Parts for Model:

Air breather valve on later model Tea 20's

Welcome Guest, Log in or Register
Author  [Modern View]
Brad V

12-05-2011 18:52:27

Report to Moderator

I recently posted regarding an oil leak from my carburettor and am greatful for the feed back. Once again John (UK) was correct in his diagnosis which was a non functioning air breather valve. This resulted in crankcase pressure being vented back through the crankcase breather pipe and into the oil bath filter and the source of my leak.

On examining the factory manual I notice that my valve is different to the diagram shown but it does say a different one was used on later models.

Does anyone have a photo or diagram of this new valve as my one looks factory but a porous bush or spring is missing to make it function.

My solution was to drill a 2mm hole in the valve head and after a 2+ hour mowing session all is as it should be and now the back pressure is being vented correctly.

Below is a photo of my one.

Many thanks
Regards Brad
This post was edited by Brad V at 18:54:04 12/05/11.

[Log in to Reply]   [No Email]

12-06-2011 16:04:27

Report to Moderator
 Re: Air breather valve on later model Tea 20's in reply to Brad V, 12-05-2011 18:52:27  
when i had my tractor apart there was nothing in the pipe to the manifold, will this effect anything?

[Log in to Reply]  [No Email]

12-06-2011 05:07:14

Report to Moderator
 Re: Air breather valve on later model Tea 20's in reply to Brad V, 12-05-2011 18:52:27  
There should be a heavy flat washer with a small hole in the middle and through the hole should be a "jiggle Pin" a thin pin that can move around in the air flow, this keeps the hole clear. You will find that the hole will block over time unless you have this pin fitted. There have been three positions for that "valve", one was in the banjo bolt on top of the Valve Cover, one was in a valve assembly that screwed into the manifold and another was where the valve was straight into the Manifold intake as in the pictures. They all did the same job, no matter where they were fitted. I have pictures if you need them....John(UK)

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

Hop to:

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). 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. [ About Us ]

Home  |  Forums

Copyright © 1997-2016 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