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Additive Feeders Chapter 5: Maintenance 35 of 50
Motor Brush Replacement
The two (2) motor brushes should be replaced when they are worn down to less than 1 inch in
length. Replacement brushes are “pre-worn” by the manufacturer and require no break-in
period.
Caution! Disconnect power to the Additive Feeder before changing the motor
brushes.
1. Remove a brush cap screw near the back of the motor.
Caution! The motor brushes are spring loaded. Use care to avoid eye injury when
removing the cap screw. Wear safety glasses when performing this
procedure.
2. Remove the brush. Make note of the direction of the tapered end of the brush face.
3. Insert the new brush (See Figure 5 below for Brush Part Numbers) with the tapered
end facing the same way as the worn brush.
4. Secure the new brush with the cap screw.
5. Repeat the above steps for the other brush.
The motor is now ready for use.
Figure 5: Replacement Motor Brush Part Numbers
Part Number Description
A0541239 115 VAC controls, motor plate marked 90 VDC, 1/20 HP
A053426-BS 115 VAC controls, motor plate marked 90 VDC, 1/10 HP