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1.Measure the resistance
between the two slip rings of the rotor coil to check the
continuity between them.
Replace the rotor if the
resistance is not within the standard value
range.
Standard value: 3 -
5 Ω
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2.Check the continuity
between the slip rings and core.
If continuity is
present, replace the rotor.
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1.Check the continuity
between coil leads.
If there is no continuity, replace
the stator.
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2.Check the continuity
between coil and core.
If there is no continuity, replace
the stator.
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1.Check the condition of the
(+) heat sink by checking continuity between the
(+) heat sink and each of the stator coil lead
connecting terminals.
If continuity is present for both
terminals, the diode is shorted. Replace the rectifier
assembly.
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2.Check the condition of the
(-) heat sink by checking continuity between the
(-) heat sink and each of the stator coil lead
connecting terminals.
If continuity is present in both
directions, the diode is shorted. Replace the rectifier
assembly.
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3.Check the condition of the
diode trio by testing continuity of each of the three diodes
using a circuit tester connected to both sides of the diode.
Connect in a polarity and then reverse the polarity for each
test.
If continuity exists or no continuity exists for
both polarities, the diode is defective. Replace the
rectifier assembly if any of the diodes is
defective.
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1.Measure the length of the
protrusion of the brush. Replace the brush if the protrusion
length is shorter than the limit.
Limit: 2 mm
minimum
2.Unsolder the lead of the brush.
The brush will come out, becoming ready for
removal.
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3.Install a new brush by
pushing it into the holder as shown in the drawing and
soldering the lead.
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