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.

Discussion Forum
:

Clooney help w/dist cap

Welcome Guest, Log in or Register
Author 
peter

11-28-2002 06:41:01




Report to Moderator

i have a1952 jd b with a jd 50 dist i put a mc or mt dist cap on it will it run better with the horizontal dist cap on it ? looking at pictures the wire placement looks different i am wondering if this would effect timming? thanks in advance pete




[Log in to Reply]   [No Email]
John T

11-28-2002 07:21:09




Report to Moderator
 Re: clooney help w/dist cap in reply to peter, 11-28-2002 06:41:01  
Peter, the distributor cap doesnt affect timing per se as you asked. Timing (as far as when the coil fires) is affected by rotating the distributor so the points open sooner (advance) or later (retard). The coil will fire even with no cap in place, when the points are closed conducting then open up. The caps job is to have the correct plug wire terminal lined up with the internal rotor tip WHEN THE POINTS OPEN TO FIRE THE COIL. The distributor cap has to be a match for the rotor, so when the points open to fire the coil, the rotor tip is in line with the correct plugs output terminal. Bottom line answer, therefore, is NO the wrong cap dont affect timing regarding when the points open to fire the coil, HOWEVER, you need the correct cap matched with the internal rotor which is in line with the plugs terminal when its supposed to be firing. Hope this helps and have a safe blessed and Happy Thanksgiving. My wife has the smoked turkey ready to take to the in laws, but Im snitching at the dark meat pieces as fast as she puts them in the dish lol. Ol John T

[Log in to Reply]  [No Email]
Clooney

11-28-2002 07:06:27




Report to Moderator
 Re: clooney help w/dist cap in reply to peter, 11-28-2002 06:41:01  
Peter, I didn't know an "M" cap would even fit.
~The internal distributor contacts for the towers MUST line up with the rotor side contact when the points open for that cylinder. You can't always tell by looking at a cap if the internal contacts are in line with the external towers. The big thing to look at when swapping cap types is the relation of the internal contacts to the cap indexing notch or locating clip.
~ In most cases there is no difference between the top & side tower cap as long a the insides are the same. The side tower cap was used to point the wires in the correct direction so they didn't stick out as far.
~There is a difference in rotors & some use two side contacts & others use a single. That can make a difference in how & when the rotor lines up with the cap tower contacts.
~Probably what you want to do is pull the cap & L/H spark plug, then turn the flywheel until the L/H cylinder starts to make compression, then keep turning & watch the points to see when they JUST start to open, at that time the (or a) rotor contact should be lining up with a L/H side plug wire tower in the cap [hold the cap over the distributor to line it up & see], then turn the flywheel 180� & watch for the points to open again, at that time the (or a) rotor contact should line up with the cap tower for the R/H wire..

[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