Bus Conversions dot Com Bulletin Board
December 20, 2014, 12:40:30 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: If you had an Online Subscription: It will not be stolen by your mailman or your neighbor who also may be into buses.
   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: [1]   Go Down
  Print  
Author Topic: polarize  (Read 916 times)
tony
Newbie
*
Offline Offline

Posts: 22


I HAVE A 1980 MCI




Ignore
« on: December 02, 2010, 04:58:11 AM »

does anyone know how to polarize a generator to a regulator
Logged
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #1 on: December 02, 2010, 05:58:35 AM »

The polarity of an alternator is determined by the diode packs.

If you have a negative-ground alternator and you want to make it positive-ground (or vice-versa), you need to change the diodes.  Generally that requires that the alternator manufacturer makes and sells a positive-ground (or negative-ground) diode pack for the unit.

-Sean
http://OurOdyssey.BlogSpot.com
Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
robertglines1
steam nut
Hero Member
*****
Offline Offline

Posts: 4061





Ignore
« Reply #2 on: December 02, 2010, 06:08:20 AM »

Generator: My 78 mci had a alternator. If you have a Generator ck how in a older car manual like in the 50"s. can"t remember the sequence but can remember doing it. is voltage regulator marked F  B  A  ?
Logged

Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana
Van
Billy Van Hagen
Hero Member
*****
Offline Offline

Posts: 2390


89' Silver Eagle 15/40 6V92MUI Boulder City,NV




Ignore
« Reply #3 on: December 02, 2010, 06:38:43 AM »

Not sure if this helps. On the older cars and Harleys with generators, you flash (touch) the field terminal to ground, check and double check, first to be sure this is your particular case, good luck!
Logged

If you are not living on the edge, then you're takin' up too much space!!!
Sean
Geek.
Hero Member
*****
Offline Offline

Posts: 2553


'85 Neoplan Spaceliner "Odyssey"


WWW

Ignore
« Reply #4 on: December 02, 2010, 06:41:58 AM »

OK, if it's really a "generator" meaning that it is straight DC with commutators and brushes, you just need to momentarily touch hot to "F" to change polarity, or momentarily short "A" and "F."

However, many so-called "generators" are actually alternators, and I don't think any 1980 MCI was fitted with a DC generator.  Specifically, Delco called the 50DN a "generator" for a long time even though it was an alternator and had diode packs.

FWIW.

-Sean
http://OurOdyssey.BlogSpot.com
« Last Edit: December 02, 2010, 06:58:03 AM by Sean » Logged

Full-timing in a 1985 Neoplan Spaceliner since 2004.
Our blog: http://OurOdyssey.BlogSpot.com
rgrauto
Full Member
***
Offline Offline

Posts: 118





Ignore
« Reply #5 on: December 02, 2010, 06:45:43 AM »

Tony, I usually use a jumper wire hooked to the + - power to momentarily to touch the F-field  terminal,that usually does it. HTH Glen
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!