Northern Lights — Replacing brushes
Repair & overhaul · generator brush assembly
From a Northern Lights owner's manual covering: 643/673, M643, M673, NL643, NL673. Check it applies to your exact model before use.
Applies to: Northern Lights M643, Northern Lights M673, Northern Lights NL643, Northern Lights NL673, Northern Lights L643 / L673 engine
Before you start
- Excessively worn brushes exposing the pigtail cause sparking and slip ring surface damage.
Procedure
- Shut down the generator and remove four screws and the end cover.
- Locate the white plastic brush assembly with two wires at ten o'clock.
- Remove the two screws and unplug the leads.
- Attach leads to the new brush assembly.
- Install with the plastic ears towards the front of the generator.
- Connect wire J to terminal J and wire K to terminal K.
Tools required
- screwdriver Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Northern Lights M643 →, Northern Lights M673 →, Northern Lights NL643 →, Northern Lights NL673 →
Source: Northern Lights owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.