18
Motor Component Testing and Inspection
MOTOR (MODEL EJ4-4001 AND EJ8-4001A)
Bearing Inspection
NOTE:
Replacement of the end cap bearing is highly-recommended if the end cap is removed from the motor. The
following procedure is provided as a guideline for determining general bearing failure.
1.
Remove the motor from the vehicle.
See Motor Removal on page 18-3.
2.
Remove the bearing by performing steps 1 through 14 of Motor Disassembly on page 18-4.
3.
Use a clean cloth to wipe the carbon dust off of the bearing. Inspect the bearing by spinning it by hand and
checking for both axial (A) and radial (B) play
(Figure 18-14, Page 18-10)
.
4.
Replace the bearing if it is noisy, does not spin smoothly, or has excessive play. Check the bearing and replace if
rusted, worn, cracked, or if there is an abnormal color change in the metal of the bearing.
A
B
756
Figure 18-13
Brush Spring Tension Test
736
Figure 18-14
Bearing Inspection
Speed Sensor Magnet Inspection
Inspect the speed sensor magnet (24) for rust, wear, and cracks
(Figure 18-15, Page 18-11)
. Replace the magnet
if necessary.
Page 18-10
2009 Electric Precedent Maintenance and Service Manual
