40 Maintenance Basics – Motor
Rotor Assembly Replacement
1.
Remove and set aside:
• two motor housing screws
(not shown)
• motor housing
(not shown)
• plastic fan
A
(discard old fan)
• two coil screws and lock washers
B
• coil (keep wires connected)
D
2.
Remove and discard the rotor
E
and two plastic
brackets
C
.
3.
Press the new plastic bearing bracket onto the threaded
brass inserts in the front of the motor case.
4.
Install new rotor assembly by inserting the shaft (helical
gear side) onto the gear case.
5.
Place the coil over the rotor and keep the copper-shaded
poles on the right-hand side (same side as the on/off switch).
6.
Snap into place the second plastic bearing bracket on
the rotor.
7.
Insert two self-tapping screws (w/lock washers).
8.
Starting at an angle, press fan (with hub side down) onto
the rotor shaft.
9.
Reinstall two motor housing screws and tighten the
self-tapping screws to secure the motor housing cover.
A
B
C
D
E
C
