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.

Tool Talk Discussion Forum

DPST switch

Welcome Guest, Log in or Register
Author 
woodbutcher

05-04-2007 09:13:13




Report to Moderator

This is a followup question concerning my bench grinder switch. The original switch has a T-handle that was in the off position when pushed in and on when pulled out. But when I looked inside, it appears that pulling the handle out pulls the copper bars away from the contacts the wires are attached to. If I wire in a regular single pole switch, the wires that the bar is pulling away from now will never be separated, and the grinder will never turn. Am I missing something about the way the old switch worked?
Butch

[Log in to Reply]   [No Email]
jeffcat

05-05-2007 09:23:42




Report to Moderator
 Re: DPST switch in reply to woodbutcher, 05-04-2007 09:13:13  
Another little note. If it is 120vac grinder the only reason it has DPDT swith is to break both sides of the line. Thus you have a double shealded motor. If you see anything that looks a little funny buy a new switch. Motor repair places would be the best bet. jeffcat



[Log in to Reply]  [No Email]
woodbutcher

05-04-2007 13:01:51




Report to Moderator
 Re: DPST switch in reply to woodbutcher, 05-04-2007 09:13:13  
Thanks to all. When the switch came apart, I didn't notice the two springs that cause the plate and contact bars to move opposite the direction of the T-handle. I think I may be able to put it back together and make it work. If not, I'll google DPST.
Butch



[Log in to Reply]  [No Email]
Vern-MI

05-05-2007 08:23:47




Report to Moderator
 Re: DPST switch in reply to woodbutcher, 05-04-2007 13:01:51  
If you can't fix it try Grizzly tools. They have them for about $3.50 with a paddle and a safety key.



[Log in to Reply]  [No Email]
Glen in TX

05-04-2007 12:55:37




Report to Moderator
 Re: DPST switch in reply to woodbutcher, 05-04-2007 09:13:13  
Try a local electric motor rebuilding shop or a Grainger dealer or other electrical supply houses.



[Log in to Reply]  [No Email]
CENTAUR

05-04-2007 12:46:41




Report to Moderator
 Re: DPST switch in reply to woodbutcher, 05-04-2007 09:13:13  
Go to GOGGLE and enter(DPST switch) and the 2nd down on the first page has excellant pics& diagrams. CENTAUR



[Log in to Reply]  [No Email]
Turtle

05-04-2007 09:38:15




Report to Moderator
 Re: DPST switch in reply to woodbutcher, 05-04-2007 09:13:13  
The switch is a double pole single throw (DPST). That means it has two sets of contacts to work with. I would be careful to put a switch back on the unit that works in the same way as the one installed for safety reasons. Pull on push off style, it is done that way as a standard so in case of an accident it can readily be pushed off. If using a single pole single throw (SPST) you will have to make sure it is set up in this way of contacts closing in the pulled position. Hope this helps.

[Log in to Reply]  [No Email]
woodbutcher

05-04-2007 10:22:35




Report to Moderator
 Re: DPST switch in reply to Turtle, 05-04-2007 09:38:15  
Thanks, Turtle. I'm in favor of safety, but I can't find a replacement that works like the original.
Butch



[Log in to Reply]  [No Email]
Jim K

05-04-2007 18:26:12




Report to Moderator
 Re: DPST switch in reply to woodbutcher, 05-04-2007 10:22:35  
I have alot of luck with old switches especially the good old ones that you can take apart, usually just clean the contacts put it back together and good to go.



[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