Inspecting And Correcting The Starter - Mitsubishi diesel engines Service Manual

ELECTRICAL SYSTEM - DISASSEMBLY, INSPECTION AND REASSEMBLY

1.2 Inspecting and correcting the starter

Inspecting the brushes
(1)
Brush wear
(a)
Measure the length of the brushes. If the
measured value is equal to or less than the
limit, replace both the brush assembly and the
brush holder assembly.
M001T68281
Brush
length
M008T70471A
M008T81071A
Measuring the brush spring load
(b)
Using a new brush and a spring balance as
illustrated, measure the spring load at which
the spring lifts from the brush. If the measured
value is equal to or less than the limit, replace
the spring.
M001T68281
Brush
spring
load
M008T70471A
M008T81071A
Brush holder insulation
(c)
Measure between each brush holder and the
brush holder base for continuity. If continuity
is indicated, replace the entire brush holder
assembly.
Check the brush holder for looseness.
7 - 12
Unit: mm (in.)
Standard
Limit
value
16.5 10.0
(0.65) (0.39)
18.0 11.0
(0.71) (0.43)
Unit: N (kgf) [lbf]
Standard
Limit
value
17.5 to 23.7 6.90
(1.78 to 2.41) (0.70)
[3.9 to 5.3] [1.6]
29.4 to 39.2 13.7
(3.0 to 4.0) (1.40)
[6.6 to 8.8] [3.1]
Replace if the measured
brush length is equal to
or less than the limit.
Inspecting the brushes
Measuring the brush spring load
Brush holder
Checking the brush holder insulation