Alternator Brushes


Information and questions on GL1500 Goldwings (1988-2000)
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Csj992
Posts: 29
Joined: Thu Jan 07, 2016 9:04 pm
Location: Athens, Georgia
Motorcycle: 1990 GL1500l w/2012 Champion trike kit, 1998 Harley Road King.

Alternator Brushes

Post by Csj992 » Thu Mar 01, 2018 9:12 am



My alternator quit on my 1990 GL1500. After disassembly I found one of the brushes stuck up away from the armature. I understand about dirt and grime not allowing something to move but could someone please tell me how the brush got pushed up in the holder. After cleaning the alternator is working fine. I am now a little worried about it failing again. Thanks, Charlie


Getting too old to have so many old vehicles. :P

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hugger-4641
Posts: 249
Joined: Wed May 25, 2011 1:07 pm
Location: McKenzie, TN
Motorcycle: 1994 GL1500 Aspencade, 1982 CM 200 Twinstar, 1984 VT500 Ascot

Re: Alternator Brushes

Post by hugger-4641 » Thu Mar 01, 2018 4:57 pm

You should be worried. Once the brushes start sticking, they will stick again. As to the reason why: could be a bump in the road that you hit, could be magnetic field when the engine is revved, stopped, or started. No telling what caused them to get stuck, but you probably need to go ahead and replace them or have a spare alternator handy. I would also install a voltmeter if you haven't already so that you are aware of the problem before your battery goes completely dead and leaves you stranded. There are several threads here about alternator problems that would probably give you some insight.

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ct1500
Posts: 1063
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: Alternator Brushes

Post by ct1500 » Thu Mar 01, 2018 8:44 pm

Csj992 wrote:
Thu Mar 01, 2018 9:12 am
My alternator quit on my 1990 GL1500. After disassembly I found one of the brushes stuck up away from the armature. I understand about dirt and grime not allowing something to move but could someone please tell me how the brush got pushed up in the holder. After cleaning the alternator is working fine. I am now a little worried about it failing again. Thanks, Charlie
Could be the brush stuck a long time ago and during use it was arcing between the slip ring and brush causing the wear until it stopped working altogether.
Could be that unless the rotor was pulled out of housing with NASA precision the bearing on rotor shaft bumped it in a little further upon removal.
Carbon dust is what hangs the brushes up and if a thorough cleaning job was done you are good to go for another 50-75k miles or thereabouts.
Local and need repair help with your 1500, Valkyrie or ST please click contact
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User avatar
Csj992
Posts: 29
Joined: Thu Jan 07, 2016 9:04 pm
Location: Athens, Georgia
Motorcycle: 1990 GL1500l w/2012 Champion trike kit, 1998 Harley Road King.

Re: Alternator Brushes

Post by Csj992 » Thu Mar 01, 2018 8:53 pm

Hey Guys, thanks for the replys. I did clean the carbon dust with cleaner and compressed air. I did just order a volt gauge. I plan on ordering an extra alternator. I was thinking of getting a high output one and using my existing one as a backup. Y'all got any ideas on a high output alternator?
Getting too old to have so many old vehicles. :P

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Bluewaterhooker0
Posts: 968
Joined: Wed Nov 14, 2012 11:27 pm
Location: Tampa, Fl
Motorcycle: 1997 Goldwing GL 1500 SE

Re: Alternator Brushes

Post by Bluewaterhooker0 » Thu Mar 01, 2018 11:17 pm

My personal choice.
85 Amps
Many have been used by folks on this forum, including me.
Be sure the one you order is "Sold by Lactrical" in the 'add to cart' section.

https://www.amazon.com/LACTRICAL-ALTERN ... +lactrical
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