64Service Manual – SC900 34 - Scrub System, Cylindrical
Brush Motor Brushes
1. Drain the recovery tank and disconnect the main battery connector.
2. Remove the Scrub Skirt described on page 63.
3. Remove the Scrub Brush Motor described on page 63.
Remove both scrub brushes.
4. Important: Using a marker or paint pen, mark the
alignment (A) of the top and bottom end caps with
respect to the motor housing (D).
5. Remove the two screws (B) that secure the top cap (C),
through the motor housing (D), and down to the bottom
cap. The screws are very long.
6. Carefully pry up the top cap (C) away from the motor
housing (D). Note the following:
• The rotor’s bearing is a light press into the top cap.
It will come free fairly easily, but care must be
taken to not skew the cap in the process.
• A very light tap on the side of the cap with a plastic
deadblow hammer should be enough to loosen the
cap enough to begin prying with a small screw
driver.
• Taking care not to damage the aluminum cap, work
the small screw driver around the cap enough to be
able to get two medium sized screw drivers in 180°
apart, and then pry up on both sides evenly.
7. Slowly and gently, lift the top cap up until the 4
brushes clear the commutator and rotor bearing.
8. Remove the nut from the terminal screw (E),
and lift the brush wire off the screw.
9. Slide the brush toward the center to remove the
brush and coil spring.
A
B
C
D
D
D
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