Yanmar 4TNV98, Руководство по обслуживанию

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4TNV98 & 4TNE98 Diesel Engine Section 7. Starter Motor 229
Measure Armature and Commutator Run-Outs
Measure the armature core run-out and the
commutator run-out using a dial indicator
(Figure
11-17) . Replace the armature if either of the
measurements is less than the limit.
Figure 11-17
See Starter Motor Specifications on page 222 for
the service limit.
Field Coil
Field Coil Continuity Test
Check for continuity between the field coil terminals
using a multimeter
(Figure11-18) . The multimeter
should indicate continuity.
If the multimeter does not indicate continuity,
replace the field coil assembly.
Figure 11-18
Field Coil Insulation Test
Check for continuity between the field coil terminal
and the yoke using a multimeter
(Figure11-19) .
The multimeter should not indicate continuity.
If the multimeter indicates continuity, replace the
field coil assembly.
Figure 11-19
Measure Brush Length
Measure the length of the brush
(Figure11-20) .
Replace the brush if the length is less than the limit.
Figure 11-20
See Starter Motor Specifications on page 222 for
the service limit.