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Page Title:
Figure 100. Frequency selector, rear view. |
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|  TM5820-222-35-110
move the rubber coupling by loos-
(2) During the 1,000-hour lubrication
ening the four small setscrews that
check of the Receiver-Transmitter
Group OA-2648/VRC-24 dynamo-
secure the rubber coupling to the
tor and dc case blower, check the
two shafts, remove the four re-
taining screws that fasten the
condition of the electrical brushes
motor to the mounting base, and
by unscrewing the brush holder
pull the motor and centrifugal fan
caps and removing the brushes.
shafts apart. Align the replacement
Replace the brushes as required.
(3) The rubber coupling on the shaft
rubber coupling with the flats of
of Centrifugal Fan HD-390/U
both shafts, slide the shafts to-
fatigues rapidly after 1,000 hours
gether, tighten the four setscrews,
of operation. During the 1,000-hour
and replace the retaining screws
lubrication check of this subunit,
and washers that fasten the motor
replace the rubber coupling. Re-
to the mounting base.
163
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