Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 10-09-2009, 20:33   #1
Registered User

Join Date: Feb 2009
Posts: 1,751
Install Balmar 3-Stage Regulator

Can someone give me a link or a step by step on how to convert an alternator to install a balmar 3 stage reg? The alt I have has an internal reg

motion30 is online now   Reply With Quote
Old 10-09-2009, 21:39   #2
Registered User
mesquaukee's Avatar

Join Date: Jun 2009
Location: Western Caribbean & ocassionaly inCanada
Boat: Mesqua Ukee, Buccaneer 40 (Salar 40)
Posts: 480
What type of alternator do you have?
If it is a Delco this is how to do it (see pics).
Basically you want to isolate the brushes from the internal regulator and rewire them so the external regulator is hooked up to one brush, the other brush goes to ground. This is done by:
1. removing the diodes that feed the internal regulator (compare pics # 1 & 4), it is that thing that bridges across all 3 terminals on the diodes and has a long arm going across to the brush holder (which sits on top of the voltage reg)
2. removing the plastic insulator from the screw that the diodes were connected to (compare pics #1 & 4) this will ground one of the brushes. Look close at pic #2 and you will see a plastic washer under the screw head, discard that link between the two screws.
3. cutt off the part of the metal tab that folds around the brush holder (see pic # 3) and attaching a wire to it (see pic # 4) and lead it out of the case, this connects to the external regulator
4. push the brushes back into the holder and insert a stiff wire through the hole to keep them fully depressed, ensure that this wire extends out through the matching hole in the body. When the alternator is fully assembled pull this wire out.
Other alternators are basically the same, just look different but are just as easy.
Attached Thumbnails
Click image for larger version

Name:	2. Oringinal wiring, coil removed.jpg
Views:	157
Size:	436.0 KB
ID:	9835   Click image for larger version

Name:	3. Brush holder an voltage regulator, before mofication.jpg
Views:	157
Size:	433.0 KB
ID:	9836  

Click image for larger version

Name:	4. Cut metal Tab on brush holder.jpg
Views:	142
Size:	422.7 KB
ID:	9837   Click image for larger version

Name:	5. Note placement of ground screw.jpg
Views:	140
Size:	439.8 KB
ID:	9838  

Click image for larger version

Name:	6. Final wiring, note placement of bonding screw.jpg
Views:	141
Size:	438.4 KB
ID:	9839  

mesquaukee is offline   Reply With Quote
Old 11-09-2009, 06:33   #3
Registered User

Join Date: Feb 2009
Posts: 1,751
Thanks Mesquakee
That is what I needed,, Mt alt is a leece neville with an internal reg, actually it is bolted to the back of the alt. One question there is a small ga. wire that connects to the top of the reg from inside the alt, any idea what that wire is? The reg is connected to the two brushes ,could that wire be a voltage feed (field) ?
motion30 is online now   Reply With Quote
Old 11-09-2009, 07:26   #4
Registered User

Join Date: Jan 2007
Posts: 497
Images: 1
Prestolite (Leece-Neville) makes a plate with the wiring on it that is a direct bolt in for most of their alternators to do what was described here, you just remove the existing regulator and put this one one, has the correct plugs on the wires. If you go to their website and search their forums for external regulator you will find the part numbers, I think there are two different ones for small frame and large frame alts.
jdoe71 is offline   Reply With Quote
Old 11-09-2009, 09:18   #5
Moderator Emeritus
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 29,347
Images: 240
Prestolite Electric / Leece-Neville

Alternator Tech Bulletins
Prestolite / Leece-Neville Technical Bulletins

Troubleshooting Leece-Neville Alternators
Technical Services

Training Manuals
Training Manual

Alternator Parts Listings
Prestolite / Leece-Neville Product Parts Listings

Prestolite Electric Inc. - Leece-Neville Heavy Duty Systems
Technical Service Hotline Phone: (866) 288-9853
On-line Forum: Support | Prestolite News
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

GordMay is offline   Reply With Quote
Old 22-09-2009, 00:06   #6
Registered User

Join Date: Feb 2009
Location: Brisbane, Oz
Boat: Roberts 36 - Clarity
Posts: 24
Hey Motion
The hard work has been done. maine Sail will take you, step by step, with photos, converting a 90 amp leece-neville to external regulation. gotta love this site. Bill
Converting An Alternator To External Regulation (Converting An Alternator To External Regulation -

clarity36 is offline   Reply With Quote

balmar, regulator

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
3 stage charger for ex honda 350 mark ayre Electrical: Batteries, Generators & Solar 8 20-04-2013 19:47
Three-Stage Regulators motion30 Electrical: Batteries, Generators & Solar 4 25-08-2009 16:12
3 stage regulator or internal regulator for AGMs? sgtPluck Electrical: Batteries, Generators & Solar 13 05-09-2008 08:50
3 stage regulator question jdoe71 Electrical: Batteries, Generators & Solar 2 29-12-2007 06:20
3 stage alternator regulator logic Fuss Electrical: Batteries, Generators & Solar 10 28-12-2007 17:48

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:13.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.