MOTOR (MODELS EJ4-4001 AND EJ8-4001A)
Motor Component Testing and Inspection
2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
Page 16b-7
16B
MOTOR COMPONENT TESTING AND INSPECTION
See General Warning, Section 10, Page 10-1.
ARMATURE INSPECTION AND TESTING
1. Remove the motor from the vehicle.
See Motor Removal, Section 16b, Page 16b-3.
2. Remove the end cap and armature by performing steps 1 through 7 of Motor Disassembly on
Visual Inspection
•
Burned, charred or cracked insulation
•
Improperly cured varnish
•
Thrown solder
•
Flared armature windings
•
Damaged armature core laminations
•
Worn, burned or glazed commutators
•
Dirty or oily commutators
•
Raised commutator bars
•
Worn armature bearing or shaft
A dirty or oily commutator should be cleaned and wiped dry. Abnormalities identified during the inspection can
help determine original cause of failure. Slight roughness of the commutator can be polished smooth with 400
grit or finer sandpaper.
See following CAUTION and NOTE.
CAUT ION
• Do not use emery cloth to polish the commutator. Particles of emery are conductive and may
short-circuit the commutator bars. Do not use oil or lubricants on the commutator or brushes.
NOTE:
Oil on the commutator may indicate a faulty transaxle input shaft oil seal.
Figure 16b-10 Brush Rigging
Figure 16b-11 Bearing Retaining Ring