Inspecting And Repairing Starter; Inspecting Brushes For Wear; Measuring Brush Spring Load; Inspecting Brush Holder For Insulation - Mitsubishi S6S-Y3T61HF Service Manual

ELECTRICAL SYSTEM

2.3 Inspecting and repairing starter

2.3.1

Inspecting brushes for wear

Measure the length of the brushes. If the measured value is
less than the limit, replace both the brush holder assembly
and the brush assembly with new ones.
Item
Brush length
2.3.2

Measuring brush spring load

Using a new brush, measure the spring load at which the
spring lifts from the brush. If the measured value is less than
the limit, replace the spring with a new one.
Item
Brush spring load
2.3.3

Inspecting brush holder for insulation

Check for no continuity between each brush holder and the
brush holder base. If continuity is found, replace the brush
holder assembly.
Check the brush holders for looseness.
2.3.4

Measuring commutator radial runout

(1) Inspect the commutator surface. If the surface is rough,
polish it using a 400 to 600 grit sandpaper.
(2) Measure the commutator radial runout with a dial
gauge. If the measured value exceeds the limit, replace
the armature with a new one.
Item
Commutator
runout [0.0020 in.] or less
12-12
Standard Limit
18 mm 11 mm
[0.71 in.] [0.43 in.]
Standard Limit
29.4 to 39.4 N 13.7 N
{3.0 to 4.0 kgf} {1.4 kgf}
[6.6 to 8.8 lbf] [3.1 lbf]
Standard Limit
0.05 mm 0.10 mm
[0.0039 in.]
Measure the
length of the
brush. Replace if
the length is equal
to or less than the
limit.
Inspecting brushes for wear
Measuring brush spring load
Insulated brush holder
Brush holder base
Checking brush holder for grounding
Measuring commutator radial runout
Commutator