Page 8 Galaxy Floor Sanding Machines, Operator’s Manual
How to Check and Replace the Carbon Brushes
The electric motor has two carbon brushes, one behind a front vent plate and the other behind a rear
vent plate. If replacement is required always replace both carbon brushes. Follow these steps:
•
Turn the power switch to the “OFF” position and unplug the machine from its electrical power
source.
•
Remove the screw on one of the vent plates. Slide it out of its grooved channel.
•
Put your finger on the exposed metal tab. Push and release it to remove the Brush Holder
Spring. Pull on the copper shunt wire and the carbon brush will come out. Inspect it. If it is over
¼” in length and its wear is even it does not need to be replaced. Wipe it with a clean dry cloth
and push it back in. Push the Brush Holder Spring in and release it. It should stay locked in.
•
If the carbon brush is less than ¼” in length or its wear is uneven it needs to be replaced. Pull
down on the wire as near as you can to the terminal. It will slide out. Reverse the procedure.
•
Always replace both carbon brushes even if only one requires replacement.
Sliding Up the Vent Plate
Pushing the Brush Holder Spring
Dust Pipe
