Welcome! Please use the navigational links on your left to explore our website.

Company Logo Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts
Salvage

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

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

Research & Info
Articles
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
Glossary

Miscellaneous
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
Kountry Life
  
Ford Tractors Discussion Forum
Order Ford 640 Parts Online

640 fuel shut off

Welcome Guest, Log in or Register
Author  [Modern View]
MI-Bill

12-19-2017 07:35:02




Report to Moderator

My shtnoff on the bottom of the tank has started leaking around the shaft. A lot when open and a little when closed. when using the tractor, the vibration will slowly close it unless it is fully open against the stop. I do not see a way of tightening a nut or anything. The shop is full and I really dont have the time right now to pull the tank. Is it possible to remove the shut off while the tractor is together. It looks like there may not be enough space under the tank to get it out???

[Log in to Reply]   [No Email]
showcrop

12-20-2017 04:05:49




Report to Moderator
 Re: 640 fuel shut off in reply to MI-Bill, 12-19-2017 07:35:02  
Quoting Removed, click Modern View to see

I have trouble finding winter gloves. My fingers are too fat for fingers of the right length so I have to wear XLs which leave a half inch of cold air beyond the tips.



[Log in to Reply]  [No Email]
MarkB_MI

12-20-2017 03:25:25




Report to Moderator
 Re: 640 fuel shut off in reply to MI-Bill, 12-19-2017 07:35:02  
It will come out no problem. Having enough room to swing a wrench can be difficult, though. If you find it difficult to remove and replace the fuel line, removing the manifold will give you lots of room.



[Log in to Reply]  [No Email]
Hobo,NC

12-19-2017 18:58:27




Report to Moderator
 Re: 640 fuel shut off in reply to MI-Bill, 12-19-2017 07:35:02  
I have got them out with out removing a thang luck I guess I found I can take the rear and front of the hood loose lift it and jam a few wood blocks tween the tank and valve cover and get the valve removed and installed EZ... Maybe I took a few more bolts loose but it was EZ...



[Log in to Reply]  [No Email]
showcrop

12-19-2017 18:56:54




Report to Moderator
 Re: 640 fuel shut off in reply to MI-Bill, 12-19-2017 07:35:02  
Quoting Removed, click Modern View to see

It sure does help. I think that it is one of those things where the job takes longer when you try to make it shorter by doing less, but then that less takes more time, just because of being awkward. I know that I have wasted plenty of time in my life by thinking that I can do it with what is in my tool box instead of taking the time to go out to my truck and get the right tool.

[Log in to Reply]  [No Email]
Dean

12-19-2017 20:23:50




Report to Moderator
 Re: 640 fuel shut off in reply to showcrop, 12-19-2017 18:56:54  
I've changed so many of them that I can do it in about 30 minutes plus about another 30 minutes to R & R the fuel.

That said, I work only on my own tractors, know exactly what I need and have the right tools on hand. It does help if your hands are not too large.

Dean



[Log in to Reply]  [No Email]
Dean

12-19-2017 17:55:12




Report to Moderator
 Re: 640 fuel shut off in reply to MI-Bill, 12-19-2017 07:35:02  
Removing the rocker arm cover will buy more room but doing so is not necessary to R & R the fuel shutoff valve.

Dean



[Log in to Reply]  [No Email]
showcrop

12-19-2017 09:49:13




Report to Moderator
 Re: 640 fuel shut off in reply to MI-Bill, 12-19-2017 07:35:02  
The trick is to remove the valve cover. It rolls out.



[Log in to Reply]  [No Email]
Dean

12-19-2017 09:18:43




Report to Moderator
 Re: 640 fuel shut off in reply to MI-Bill, 12-19-2017 07:35:02  
Yes, the fuel shutoff valve can be removed and replaced without removing the sheet metal and tank.

You will need the right tools, and it helps if your hands are not too large but it can be done.

I've done it so often that I spend more time removing and replacing the fuel than removing and replacing the valve.

Be careful as you will loose some fuel.

Dean



[Log in to Reply]  [No Email]
GlenIdaho

12-19-2017 09:01:44




Report to Moderator
 Re: 640 fuel shut off in reply to MI-Bill, 12-19-2017 07:35:02  
You most likely have the screw type shut off valve. There is an O-ring that seals the screw which can be replaced. There is a rivet/pin that holds the screw in and prevents it from being screwed out. This can be removed by using a knife blade and carefully prying it up and out. Retain the pin so you can measure the length. The screw and O-ring can then be removed. You can then CAREFULLY tap the hole and use a screw of equal length to the pin as a replacement.(If I recall correctly I used a #10) Find a Viton O-ring as they resist fuel damage. The shut off valve can be removed with the tank on, however there is, as you noted, limited space. If you have small hands it's a great benefit here. If you have a loader it will be more difficult because access is limited. You can search the archives for threads concerning this issue. I rebuilt my shut-off valve and have had not issues leaking. What can occur is that the seat where the screw meets the valve body and the screw tip can become corroded and rough not allowing a proper seal. A little effort polishing the screw end and seat can help. Hope this is of help to you.

[Log in to Reply]  [No Email]
riveroadrat

12-19-2017 11:54:57




Report to Moderator
 Re: 640 fuel shut off in reply to GlenIdaho, 12-19-2017 09:01:44  
Put an inline shutoff so you dont have to use that one anymore. The aftermarket I have used start leaking pretty quick and you can tell they are sloppy.



[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


Today's Featured Article - Trenching With a Plow - by Staff. Introduction: This interesting information came from one of the discussion forums here at YT. We thought we should place it up front so it could be read by anyone interested in putting old iron to work. [Editor] I tried something new today, and it worked so well I thought I should post it - in case it might help someone else. I'm running 100 yards of 4" drain pipe from the gutter downspouts of our house to a pond down the hill. This should hel ... [Read Article]

Latest Ad: 990 7 foot mower conditioner john deere hay rake pto driven john deere head carrier [More Ads]

Copyright © 1997-2021 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