Checking for Brush Wear
1.
Check
to
see
that the brush has worn down more than 1/3 the standard dimensions.
2.
If wear exceeds the allowable limit, replace.
Allowable limit
Longer than
10.5
mm
(0.4134
in.)
• Dimensions of starter brush
Length
16.0
mm
0.6299 in.
Width
12.0 mm
0.4724 in.
Thickness
7.0
mm
0.2756 in.
Checking Brush Spring Tension
1.
Measure the tension with a new spring
in
place.
2.
Replace if the tension
is
under the reference value.
Reference value
Spring tension
Commutator diameter
1. Spring Hanger
9.8N
(1.0
kgf,
2.21
Ibs)
32.70 mm
(1.2874
in.)
",
, .'
.......
I!
'.
"
(1)
"
i~(2)
2. Install the Brush and Spring
in
this Manner
3.
Brush
164
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