4-15 ELECTRICAL
Armature core
Commutator
Shaft
Check for continuity between the commutator and the arma-
ture core / shaft.
Replace armature if continuity is indicated.
Check for continuity between the adjacent commutator seg-
ments.
Replace armature if no continuity is indicated.
09930-99320 : Digital tester
Tester range : (Continuity)
BRUSHES
Check the length of each brush.
09900-20101 : Vernier calipers
Brush length:
Standard : 17.0 mm (0.67 in.)
Service limit : 10.0 mm (0.39 in.)
If brushes are worn down to the service limit, they must be re-
placed.
BRUSH HOLDER
Check brush holder continuity.
09930-99320 : Digital tester
Tester range : (Continuity)
Brush holder continuity :
z
z
z
Tester probe connection Continuity
Brush holder positive + to Brush holder
negative -
No
Brush holder positive + to Base plate
(ground)
No
Brush
+
-
Base plate
r
r
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