|
mph
Switcher
Status:
offline
| |
 Posted - January 20 2013 : 9:19:47 PM
|
A few months ago I picked up a mantua 0-4-0 with a metal boiler. When it arrived, I noticed te boiler was cracked and I put it in the project stack until I could find a repalcement boiler. Today, I picked a boiler and started to rebuild the locomotive. Everytihng went well until I test ran it. It ran well, but the polarity was backwards. I compared the wiring with my other 0-4-0s and everything is identical - pickup wheels on the tender are on the same side, etc.
My question is did early Mantua units have the polarity switched from later years. If it helps identify the age, this unit has two screws to mount the motor and does not have tabs under the cab to mount the boiler. It also has Mantua stamped on the top of the frame between the pilot and the cylanders.
Any information or suggestions on how to change the polarity are appreciate.
Mark
|
Country:  USA ~
Posts: 39 ~
Member Since: January 19 2013 ~
Last Visit: February 15 2016
|
Alert Moderator
|
|
|
|
Posted - January 20 2013 : 9:26:47 PM
|
Maybe something isn't insulated correctly? Sure the input wires for the track ain;t backwards or something silly?!
" Heck with counting 'em rivets, TRAINS ARE FOR FUN! Not called the Mad Scientist for nothing either!"
|
|
Country: USA ~
Posts: 3147 ~
Member Since: May 07 2007 ~
Last Visit: June 10 2025
|
Alert Moderator
|
|
|
|
Posted - January 20 2013 : 9:27:50 PM
|
the motor top and bottom are almost identical
rotate the motor... only thing I can think of.
double check this by placing a second locomotive on the track. power up the track...
John
I don't have a one track mind. It depends on the turn-out.
"I love your catenary!"
Is that a power-trip or just another pick-up line?
|
Country:  Canada ~
Posts: 1124 ~
Member Since: December 15 2006 ~
Last Visit: January 30 2023
|
Alert Moderator
|
|
|
mph
Switcher
Status:
offline
| |
Posted - January 20 2013 : 11:05:50 PM
|
| Thanks for the responses. I am testing the loco on an established layout and it runs in the opposite direction as my other locos. I thought about flipping the motor, but there doesn't appear to be an easy way to do it. The only thought I had was to try and flip the drivers and tender trucks, but I really don't want to go through all of the rod work required.
|
|
Country: USA ~
Posts: 39 ~
Member Since: January 19 2013 ~
Last Visit: February 15 2016
|
Alert Moderator
|
|
|
|
Posted - January 20 2013 : 11:33:33 PM
|
If the motor magnet was removed and replaced upside down, it will run the other direction.
Ray
|
|
Country: USA ~
Posts: 1285 ~
Member Since: December 14 2005 ~
Last Visit: May 16 2019
|
Alert Moderator
|
|
|
|
Posted - January 21 2013 : 08:57:28 AM
|
Rays right . if all looks the same , someone has flipped the maganet, reversing the direction of the motor rotation.
frank
toptrain
" It's a Heck of a Day " !!!
|
|
Country: USA ~
Posts: 7519 ~
Member Since: August 07 2008 ~
Last Visit: June 19 2025
|
Alert Moderator
|
|
|
|
Posted - January 21 2013 : 8:46:19 PM
|
quote:Rays right . if all looks the same , someone has flipped the maganet, reversing the direction of the motor rotation.
frank
Originally posted by toptrain - January 21 2013 : 08:57:28 AM
|
^^ ^^
YES, WHAT HE SAID!
I don't have a one track mind. It depends on the turn-out.
"I love your catenary!"
Is that a power-trip or just another pick-up line?
|
|
Country: Canada ~
Posts: 1124 ~
Member Since: December 15 2006 ~
Last Visit: January 30 2023
|
Alert Moderator
|
|
|
|
Posted - January 22 2013 : 08:01:23 AM
|
There is no reversing switch on a DC locomotive. it is not needed. The reverse switch is on the power pack
toptrain
" It's a Heck of a Day " !!!
|
|
Country: USA ~
Posts: 7519 ~
Member Since: August 07 2008 ~
Last Visit: June 19 2025
|
Alert Moderator
|
|
|
mph
Switcher
Status:
offline
| |
Posted - January 22 2013 : 7:47:09 PM
|
The magnet was the culprit. I flipped it over and everything is running in the right direction.
Thanks for the help!!
Mark
|
|
Country: USA ~
Posts: 39 ~
Member Since: January 19 2013 ~
Last Visit: February 15 2016
|
Alert Moderator
|
|
|
|
Posted - January 25 2013 : 6:18:41 PM
|
quote from Blue Harvest...
"I made sandwiches! Yea!"
John
p.s. George Peppard: "I love it when a plan comes together!" 
I don't have a one track mind. It depends on the turn-out.
"I love your catenary!"
Is that a power-trip or just another pick-up line?
|
|
Country: Canada ~
Posts: 1124 ~
Member Since: December 15 2006 ~
Last Visit: January 30 2023
|
Alert Moderator
|
|
|
|
Posted - February 05 2013 : 12:45:05 PM
|
quote:The magnet was the culprit. I flipped it over and everything is running in the right direction.
Thanks for the help!!
Mark
Originally posted by mph - January 22 2013 : 7:47:09 PM
|
THANK YOU for answering the question I had of why one of my engines would only run backwards! I took the plunge of resurrecting some old engines of mine over the holidays. After reassembly, one engine would only run BACKWARDS. Now at least I have an idea that that a misplaced magnet might be the culprit.
ArtSkull.com: Graphic Design & Illustration
|
|
Country: USA ~
Posts: 69 ~
Member Since: December 11 2012 ~
Last Visit: January 19 2020
|
Alert Moderator
|
|
|
|
Posted - February 05 2013 : 3:01:06 PM
|
The +plus side goes to the +plus side
& the -minus side goes to the -minus side
|
|
Country: USA ~
Posts: 14908 ~
Member Since: February 23 2009 ~
Last Visit: June 20 2025
|
Alert Moderator
|
|
|
|
Posted - February 07 2013 : 12:55:08 PM
|
You learn something new everyday!
ArtSkull.com: Graphic Design & Illustration
|
|
Country: USA ~
Posts: 69 ~
Member Since: December 11 2012 ~
Last Visit: January 19 2020
|
Alert Moderator
|
|
|
|
Posted - February 07 2013 : 1:17:00 PM
|
| HMMM my one royal blue does this as the prior owner said he put another motor in it. Same solution here or something different?
|
|
Country: USA ~
Posts: 457 ~
Member Since: February 20 2010 ~
Last Visit: April 24 2020
|
Alert Moderator
|
|
|
|
Posted - February 07 2013 : 8:08:18 PM
|
quote:HMMM my one royal blue does this as the prior owner said he put another motor in it. Same solution here or something different?
Originally posted by royal blue - February 07 2013 : 1:17:00 PM
|
That's a completely different motor, but he may have screwed the brush end of the motor on upside-down. If not, then the magnets are flipped.
The Tyco Depot
|
|
Country: USA ~
Posts: 3927 ~
Member Since: June 20 2007 ~
Last Visit: November 19 2015
|
Alert Moderator
|
|
Home
Forums
Events Calendar
Forum Admins & Mods
Register
