Commutator diameter, Armature inspection, Special tool – Kawasaki STX-15F User Manual

Page 356: Brush lead inspection, Brush plate and terminal bolt inspection, Brush plate and

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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 is 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 Bolt 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.

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