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14-30 ELECTRICAL SYSTEM
Electric Starter System
•
Measure the diameter [A] of the commutator [B].
Replace the starter motor with a new one if the commu-
tator diameter is less than the service limit.
Commutator Diameter
Standard: 28 mm (1.1024 in.)
Service Limit: 27 mm (1.063 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 within the hand tester. If all other starter mo-
tor 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.
Brush Lead Inspection
•
Using the × 1 Ω hand tester range, measure the resis-
tance as shown.
[A] Terminal and Positive Brush
[B] Brush Plate and Negative Brush
Special Tool - Hand Tester: 57001-1394
If there i s not close to zero ohms, the brush lead has an
open. Replace the positive brush assembly and/or the
negative brush assembly.
Brush Plate and Terminal Bo lt Inspection
•
Using the highest hand tester range, measure the resis-
tance as shown.
[A] Terminal Bolt and Brush Plate
[B] Terminal Bolt and Yoke
If there is any reading, the negative brush assembly
and/or positive brush assembly have a short. Replace
the negative and positive brush assemblies.