18
Motor Component Testing and Inspection
MOTOR (MODEL EJ4-4001 AND EJ8-4001A)
CAUTION
• 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
CAUTION
• 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 (1) and the other on the armature
core (2). The multimeter should indicate no continuity
(Figure 18-12, Page 18-8)
. If the reading is incorrect,
replace the armature.
1
2
734
Figure 18-12
Armature Test
Page 18-8
2009 Electric Precedent Maintenance and Service Manual
