MOTOR (MODEL EJ4-4001)
Motor Component Testing and Inspection
2005 Precedent IQ System Electric Golf Car Maintenance and Service Manual
Page 15b-7
15B
•
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.
Armature Ground Test
CAUT ION
• Do not submerge the armature in solvent.
NOTE: Before testing the armature, wipe it clean with a clean cloth. Remove any carbon dust and metal
particles from between the commutator bars.
1. With a multimeter set to 200 ohms, place one probe on the commutator and the other on the armature
core. The multimeter should indicate no continuity
(Figure 15b-12, Page 15b-7)
. If the reading is incor-
rect, replace the armature.
Figure 15b-12 Armature Test
COMMUTATOR
ARMATURE CORE
