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ELECTRICAL SYSTEM 16-57
Electric Starter System
Brush Inspection
•
Measure the length [A] of each brush [B].
If any is worn down to the service limit, replace the brush
holder assembly.
Starter Motor Brush Length
Standard: 10 mm (0.39 in.)
Service Limit: 5.0 mm (0.20 in.)
Commutator Cleaning and Inspection
•
Smooth the commutator surface [A] if necessary with fine
emery cloth [B], and clean out the grooves.
•
Measure the diameter [A] of the commutator [B].
If the commutator diameter is less than the service limit,
replace the starter motor with a new one .
Commutator Diameter
Standard: 28 mm (1.10 in.)
Service Limit: 27 mm (1.06 in.)
Armature Inspection
•
Using the × 1 Ω hand tester range, measure the resis-
tance between any two commutator segments [A].
Special Tool - Hand Tester: 57001-1394
If there is a high resistance or no reading (∞) between any
two segments, a winding is open and the starter motor
must be replaced.
•
Using the highest hand tester range, measure the resis-
tance between the segments and the shaft [B].
If there is any reading at all, the armature has a short and
the starter motor must be replaced.
NOTE
○
Even if the foregoing checks show the armature to be
good, it may be defective in some manner not readily
detectable with the hand tester. If all other starter motor
and starter motor circuit components check good, but
the starter motor still does not turn over or only turns
over weakly, replace the starter motor with a new one.
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