Dynamo brushes sparking.

General purpose topics/chat goes in here
Locked
laxy
Member
Posts: 790
Joined: Sat Jan 01, 1994 12:00 am
Location: LINCOLNSHIRE UK

Dynamo brushes sparking.

Post by laxy »

Ive been servicing my dynamo today on my 55 350 heavyweight. Cleaned comutater , brushes checked wiring etc. Ive noticed with engine running in a dark garage very small sparks can be seen where the brushes contact the comutater . The dynamo is working normaly ie charging the battery when the headlight is switched on. So im not too worried about this but just wondered if this sparking was normal.
User avatar
Rob Harknett
Member
Posts: 11211
Joined: Mon Jan 01, 1990 12:00 am
Location: ESSEX UK

Re: Dynamo brushes sparking.

Post by Rob Harknett »

laxy wrote:Ive been servicing my dynamo today on my 55 350 heavyweight. Cleaned comutater , brushes checked wiring etc. Ive noticed with engine running in a dark garage very small sparks can be seen where the brushes contact the comutater . The dynamo is working normaly ie charging the battery when the headlight is switched on. So im not too worried about this but just wondered if this sparking was normal.
I am sure in the dark you will see some sparking. Even more so if the comutater has any burns or scuffing, brushes will also need to bed in. Worn bearings may encourage sparking.
Locked