147
9
MOTOR
152T059
Sand paper
Brush
Commutator
l
Repairing surface of brush
l
If the contacting surface is not good, repair it as
follows.
152T042
l
Inspection of contacting
surface of brush
Good
Not Good Not Good
Commutator
Brush
Inspection of force of spring
4
3
Inspection of contacting surface of brush
4
2
<Repairing procedure>
1. Insert a sand paper [#400] between COMMUTATOR
and BRUSH.
(Face the file side to the brush.)
2. Polish the contacting surface of the brush by moving a
sand paper or rotating COMMUTATOR by hand.
3. Blow the dust out with compressed air after repairing.
l
Hook a spring scale to the brush SPRING and check if
both springs have the same tension.
Then make sure of equal force on 2 springs.
<Specific force of SPRING>
Applicable motor
Reference value
EPS motor
(NIKKO only)
5 N
(0.5 kgf)
If the SPRING and/or the brush holder were
rusted, replace them.
CAUTION
152T060
Spring
l
Inspection of force of spring
Spring scale
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