Yesterday's Tractor Co.
Shop Now View Cart
   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 inLog in 

8M sediment bowl threads


 
Post new topic    
View previous topic :: View next topic  
Author Message
Keith Molden
Tractor Expert


Joined: 05 Mar 2009
Posts: 2169
Location: Pomeroy, Ohio (Meigs County)

Report to Moderator

PostPosted: Thu Aug 09, 2018 7:31 am    Post subject: 8M sediment bowl threads Reply to specific post Reply with quote

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
 
Back to top
View user's profile
sunsettractor
Regular


Joined: 18 Mar 2009
Posts: 208


Report to Moderator

PostPosted: Thu Aug 09, 2018 8:50 am    Post subject: Re: 8M sediment bowl threads Reply to specific post Reply with quote

3/8 pipe thread is what it originally was...Tom
 
Back to top
View user's profile
Jim L WA
Long Time User


Joined: 17 Jun 2010
Posts: 547


Report to Moderator

PostPosted: Thu Aug 09, 2018 10:56 am    Post subject: Re: 8M sediment bowl threads Reply to specific post Reply with quote

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.
 
Back to top
View user's profile
Keith Molden
Tractor Expert


Joined: 05 Mar 2009
Posts: 2169
Location: Pomeroy, Ohio (Meigs County)

Report to Moderator

PostPosted: Thu Aug 09, 2018 1:10 pm    Post subject: Re: 8M sediment bowl threads Reply to specific post Reply with quote

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
 
Back to top
View user's profile
Jim L WA
Long Time User


Joined: 17 Jun 2010
Posts: 547


Report to Moderator

PostPosted: Thu Aug 09, 2018 3:42 pm    Post subject: Re: 8M sediment bowl threads Reply to specific post Reply with quote

Keith, maybe I misunderstood, I thought you said 9/16 was too small. 9/16 is larger than 3/8 I think.
 
Back to top
View user's profile
Keith Molden
Tractor Expert


Joined: 05 Mar 2009
Posts: 2169
Location: Pomeroy, Ohio (Meigs County)

Report to Moderator

PostPosted: Thu Aug 09, 2018 5:25 pm    Post subject: Re: 8M sediment bowl threads Reply to specific post Reply with quote

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
 
Back to top
View user's profile
Tim PloughNman Daley
Tractor Expert


Joined: 18 Sep 2004
Posts: 2881


Report to Moderator

PostPosted: Fri Aug 10, 2018 5:59 am    Post subject: Re: 8M sediment bowl threads Reply to specific post Reply with quote

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)
 
Back to top
View user's profile
:   
Post new topic    Yesterday's Tractors Forum Index -> Ford 9N, 2N, 8N All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  

TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). We have the parts you need to repair your tractor - the right parts. Our fast shipping, low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

YT Home  |  Forums

Modern View Forum 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