Yesterday's Tractor Co. 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

Community
Discussion Forums
Project Journals
Tractor Town
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
TractorLinks.com
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Kountry Life
  
Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

8M sediment bowl threads

Welcome Guest, Log in or Register
Author  [Modern View]
Keith Molden

08-09-2018 08:31:28




Report to Moderator

We recently bought an 8N that has the threads messed up where the sediment bowl screws into the fuel tank. I bought a new sediment bowl and can't seem to find a proper tap to chase the threads in the tank. What size should I get to do this with. I know it's not n.c and it doesn't look like pipe threads. 9/16 is too small and 3/4 is too large so I'm pretty stumped. Looking for what I need to get this old girl going again. Thanks guys, Keith

[Log in to Reply]   [No Email]
Tim PloughNman Daley

08-10-2018 06:59:03




Report to Moderator
 Re: 8M sediment bowl threads in reply to Keith Molden, 08-09-2018 08:31:28  
NO!!! You don't want to chase the threads on the fuel tank, especially if you don't know and understand threads. If you or someone else has already mucked up the tank port with the incorrect tap, or cross-thread the sediment bulb intake port, the tank is likely ruined. Attempting to 'band-aid' fix it is suicide. Do you want to be nervous every time running the tractor worrying about if the fuel is going to leak? NPT Threads are TAPERED. They are different than standard UNC and UNF threads. 3/8 isn't the nominal OD size like on a standard 3/8-24 UNF thread where .375" is the MAJOR DIAMETER of the nominal thread size. 24 designates threads per inch (TPI). On a 3/8 NPT thread, the 3/8 is defined as the minor diameter of the pipe or tube the thread fits. When an NPT tap is screwed in, the deeper it goes, the larger the top of the hole becomes, it's tapered small to large, and if screwed in too far, will destroy the hole size completely. The purpose of an NPT thread is to tightly seal the connection. As the male part is screwed into the female part, it naturally creates its own seal at each revolution. If it is enlarged beyond the largest portion of the tap, then the hole is ruined. There are GO-and NO-GO thread gauges for NPT threads just like standard UNC and UNF threads. If your 'new' sediment bulb is not going in, be aware that some mew/aftermarket units are junk out of the box -I've had one in my life, and if not careful they can ruin your tank. It matters where you buy parts from. Also related to the fuel line and sediment bulb is the special thread size used on the 1/4" steel line, fittings, and ports, both on the sediment bulb and the carb brass inlet elbow. The thread is a special pitch, used on brake and fuel lines, 7/16-24 UNS and anything else used will only booger it up and cause leaks. Forget Teflon tape, silicone, or any gasket material.

Tim *PloughNman* Daley(MI)

[Log in to Reply]  [No Email]
Jim L WA

08-09-2018 11:56:11




Report to Moderator
 Re: 8M sediment bowl threads in reply to Keith Molden, 08-09-2018 08:31:28  
You may have to drill and tap it for a bushing to get it back to 3/8 P.T. But make sure the stem for the sediment bowl will go up through the bushing first. Assuming the gas tank is dry, rig up a small hose to a vacuum or use some sort of a magnet to get out any metal chips. Sorry you ran into this with your newly bought 8N.



[Log in to Reply]  [No Email]
sunsettractor

08-09-2018 09:50:25




Report to Moderator
 Re: 8M sediment bowl threads in reply to Keith Molden, 08-09-2018 08:31:28  
3/8 pipe thread is what it originally was...Tom



[Log in to Reply]  [No Email]
Keith Molden

08-09-2018 18:25:05




Report to Moderator
 Re: 8M sediment bowl threads in reply to sunsettractor, 08-09-2018 09:50:25  
Thanks guys, I was thinking it probably is 3/8 npt so now I need to get a tap and chase the threads. I'm pretty sure there is plenty of meat for them, someone has just cross threaded the ones in there now. ONCE AGAIN, THANKS Keith



[Log in to Reply]  [No Email]
Keith Molden

08-09-2018 14:10:16




Report to Moderator
 Re: 8M sediment bowl threads in reply to sunsettractor, 08-09-2018 09:50:25  
Thanks guys, I was thinking it probably is 3/8 npt so now I need to get a tap and chase the threads. I'm pretty sure there is plenty of meat for them, someone has just cross threaded the ones in there now. ONCE AGAIN, THANKS Keith



[Log in to Reply]  [No Email]
Jim L WA

08-09-2018 16:42:53




Report to Moderator
 Re: 8M sediment bowl threads in reply to Keith Molden, 08-09-2018 14:10:16  
Keith, maybe I misunderstood, I thought you said 9/16 was too small. 9/16 is larger than 3/8 I think.



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

Hop to:


TRACTOR PARTS TRACTOR MANUALS
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 © 1997-2018 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