Kawasaki STX-15F service manual Armature Inspection, Brush Lead Inspection

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.