E N G IN E ELECTRICAL
6Y-11
NOTE: There are two diode trio units
differing in appearance used in the generator
but they are completely interchangeable.
The diode trio may also be checked for a grounded
brush lead while still installed in the end frame. Connect
an ohmmeter from the brush lead clip to the end frame
as shown in Step 2, Figure 1C, then reverse the lead
connection. If both readings are zero, check for a
grounded brush lead clip caused by omission of the
insulating washer, of the insulating sleeve over the screw,
or damaged insulating sleeve. Remove the screw to
inspect the sleeve. If sleeve or screw are not grounded,
replace regulator.
CAUTION: Do not use high voltage to check
the diode trio, such as 110 volt test lamp.
Rectifier Bridge Check (fig. 6C)
Connect an ohmmeter to the grounded heat sink and one
of the three terminals. Then reverse the lead connections
to the grounded heat sink and same terminal. If both
readings are the same, replace the bridge. A good
rectifier bridge will give one high and one low reading.
Repeat this same test between the grounded heat sink
and the other two terminals, and between the insulated
heat sink and each of the three terminals. When this is
done all six diodes are checked with two readings taken
for each diode.
NOTE: The diodes are not replaced individu
ally. The entire rectifier bridge is replaced if
one or more diodes are defective.
CAUTION: Do not use high voltage to check
the rectifier bridge, such as a 110 volt test
lamp.
Voltage Reg./Brush Lead Clip Check (fig.
7C)
Connect an ohmmeter from the brush lead clip to the
end frame as shown in Step 1, Figure 1C. Then reverse
lead connections. If both readings are zero, either the
brush lead clip is grounded or the regulator is defective.
A grounded brush lead clip can result from omission of
the insulating washer, omission of the insulating sleeve
on the screw, or a damaged insulating sleeve. Remove
the screw and inspect the sleeve. If it is satisfactory,
replace the regulator unit.
BRUSH
HOLDER
REGULATOR
OHMMETER
INSULATING
WASHER
INSULATED
HEAT SINK
GROUNDED
HEAT SINK
CAPACITOR
DIODE
ATTACHING
TRIO
n u t s
BRIDGE
OHMMETER
INSULATING
OHMMETER
Fig. 6 C -R e c tifie r Bridge Checks
Fig. 7C--Brush Lead C lip Checks
CHASSIS OVERHAUL MANUAL
Содержание 10 series 1973
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Страница 144: ...ENGINE 6 3 OIL PRESSURE SENDING UNIT Fig 1 In Line Engine Lubrication OVERHAUL MANUAL...
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Страница 247: ...7 M 28 CLUTCHES AND MANUAL TRANSMISSIONS Fig 19X Loading Countergear Bearings Fig 20X Loading Mainshaft Pilot Bearings...
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Страница 352: ...AUTOMATIC TRANSMISSION 7A 49 Fig 85M Planetary Gear Train Exploded View OVERHAUL MANUAL...
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