Yanmar 3TNV76 - Page 207

STARTER MOTOR
TNV IDI Service Manual
10-13
Starter Motor
Measure Armature and Commutator Run-Out
Measure the armature core run-out and the
commutator run-out using a dial indicator
(Figure 10-17). Replace the armature if either of
the measurements is not within specifications. See
Starter Motor Specifications on page 10-5 for
service limit.
Figure 10-17
Field Coil
Field Coil Continuity Test
Check for continuity between the field coil terminals
using a multimeter (Figure 10-18). The multimeter
should indicate continuity.
If the multimeter does not indicate continuity,
replace the field coil assembly.
Figure 10-18
Field Coil Insulation Test
Check for continuity between either field coil
terminal and the yoke using a multimeter
(Figure 10-19). The multimeter should not indicate
continuity.
If the multimeter indicates continuity, replace the
field coil assembly.
Figure 10-19
Measure Brush Length
Measure the length of the brush (Figure 10-20).
Replace the brush if the length is less than the limit.
See Starter Motor Specifications on page 10-5 for
service limit.
Figure 10-20
0000116
000011
9
000012
0
0000121
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