AT&T Bell System Plant Series Adjusting Manual page 3

vacuum cleaner. If the rubber gaskets on the
cleaner head or the aluminum ring have lost
their resiliency, replace the gaskets.
Caution: The vacuum cleaner should never
be used for cleaning when the felt-cambric
filter is torn or missing.
3.003
Removing and Remounting Motor
Brushes:
To remove a brush from its
brush holder proceed as covered in
(1),
and to
remount the brush proceed as covered in (2).
(1) To gain access to the motor brushes, remove
the cleaner head from the dust container as
covered in 3.002(1). Unscrew and remove a
brush holder cap with the fingers. Loosen the
brush spring plate in the brush holder by inserting
a thumbnail between the plate and the holder
and then remove the brush assembly by pulling
on the plate. Mark the brush to ensure its being
remounted in the same brush holder and position
relative to the commutator surface.
(2) To remount a brush, place it in the slots
of the brush holder from which it was
removed and in its original position with respect
to the commutator surface. Push the brush
and spring into the holder, insert the brush
spring plate tabs in the slots and seat the plate
on the holder.
If the brush spring plate does
not remain seated on the brush holder, bend
the tabs on the plate out slightly. Mount the
cap. Remount the cleaner head as covered in
3.002(2).
3.01
Cleaning (Reqt. 2.01):
(1) Do the following cleaning at a place remote
from the central office apparatus.
(2) Remove the dust from inside the dust
container as follows: Remove the cleaner
head from the dust container as covered in
3.002(1). Leave the hose attached to the container
at this time. Hold the filter assembly in the
dust container with one hand and tap around
the inside of the felt-cambric filter with the
other hand. Give the dust time to settle and
then remove the filter assembly from the dust
container. Remove the hose by turning the
coupling counterclockwise and pulling it away
from the container. Empty the dust in the dust
ISS 3, SECTION 075-180-703
container into a suitable closed receptacle. Do
not wash or dry clean the felt-cambric filter.
(3) If the dust container is provided with the
rubber baffle described in 1.03 and shown
in Fig. 2, the filter assembly should have a
disposable paper filter mounted over the
felt-cambric filter. If the paper filter is clogged
with dust or is missing, mount a new paper filter
as follows: Remove the old paper filter. Examine
the felt-cambric filter c.nd if it is clogged or torn
replace it. Slip the new paper filter over the
outside of the felt-cambric filter until the
cardboard ring in the paper filter is against the
rubber gasket of the filter assembly.
(4) If the dust container does not have a rubber
baffle as shown in Fig. 2, examine the
felt-cambric filter and if it is clogged or torn
replace it.
(5) Place the filter assembly in the dust container
and remount the cleaner head in the dust
container as covered in 3.002(2).
(6) Clean the commutator as follows. Remove
the motor brushes as covered in 3.003(1).
Turn the commutator with the fingers and wipe
the surface with a clean, dry KS-14666 cloth. If
the commutator surface is smutted and cannot
be so cleaned, clean it with a KS-14666 cloth
moistened with KS-7860 petroleum spirits. Then
wipe the commutator dry with a clean dry
KS-14666 cloth. Remount the motor brushes as
covered in 3.003(2).
Note: A bronze-colored, highly polished
surface is very desirable and it should not be
mistaken for a burned commutator. If the
surface presents this condition and is smooth,
the commutator is satisfactory.
(7) If the commutator needs reconditioning, refer
the matter to the supervisor.
(8) After cleaning the parts, reassemble the
vacuum cleaner as covered in 3.002(2).
(9) Clean the external surfaces of the vacuum
cleaner with a KS-14666 cloth.
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