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MOTOR (MODELS EJ4-4001 AND EJ8-4001A)
Motor Component Testing and Inspection
Page 16b-10
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
16B
Terminal Insulator Inspection
1. Remove the motor from the vehicle.
See Motor Removal, Section 16b, Page 16b-3.
2. Remove the terminal insulators by performing steps 1 through 12 of Motor Disassembly on page 16b-5.
1. Inspect the insulators (4 and 6) for cracks or other damage
. Replace
insulators as required.
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, Section 16b, Page 16b-3.
2. Remove the bearing by performing steps 1 through 14 of Motor Disassembly on page 16b-5.
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
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.
Speed Sensor Magnet Inspection
Inspect the speed sensor magnet (24) for rust, wear, and cracks
. Replace the
magnet if necessary.
Figure 16b-13 Brush Spring Tension Test
Figure 16b-14 Bearing Inspection
C-SHAPED
STEEL PLATE
SCALE
A
B