Inspecting And Repairing Starter; Inspecting Brushes For Wear; Measuring Brush Spring Load; Inspecting Brush Holder For Insulation - Mitsubishi Heavy Industries SL Series Service Manual

ELECTRICAL SYSTEM

2.4 Inspecting and repairing starter

2.4.1

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
M001T68281
Brush length
M008T70471A
M008T81071A
2.4.2

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
M001T68281
Brush
spring load
M008T70471A
M008T81071A
2.4.3

Inspecting brush holder for insulation

Check that there is no continuity between each brush holder
and the brush holder base. If continuity is observed, replace
the whole brush holder assembly.
Check the brush holders for looseness.
12-14
Standard Limit
16.5 mm 10.0 mm
[0.650 in.] [0.394 in.]
17.5 mm 11.0 mm
[0.689 in.] [0.433 in.]
Standard Limit
17.5 to 23.7 N 6.86 N
{1.78 to 2.42 kgf} {0.70 kgf}
[3.92 to 5.34 lbf] [1.54 lbf]
26.7 to 36.1 N 14.7 N
{2.7 to 3.7 kgf} {1.5 kgf}
[6.00 to 8.12 lbf] [3.31 lbf]
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