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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: 2.1 - 2.4
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 continuity, replace
the stator.
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1.Check the condition of the
(+) heat sink by checking the continuity between the
(+) heat sink and each of the stator coil lead
connecting terminals.
If the continuity is present for
both terminals, or if no 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 the continuity between the
(-) heat sink and each of the stator coil lead
connecting terminals.
If the continuity is present for
both terminals, or if no continuity is present for both
terminals, the diode is shorted. Replace the rectifier
assembly.
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3.Diode Trio Test: Check
three diodes for continuity by connecting an ammeter to both
ends of each diode.
If there is no continuity in both
directions, diode is faulty and heatsink assembly must be
replaced.
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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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