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OILING
The
CB -11
and
CB
-21 chassis are equipped with Chrysler oilite
bearings
in the
main center spindle
and on each idler wheel bearing.
Thus, little,
if any,
oiling
is
required
at
this point,
although
in
some
instances where the equipment
is
new and tight, oiling
-may
be
required
for
a
period of three or four
weeks.
Remove
the idler
wheels and the platter.
Clean both the inside
of
the spindle bear-
ing with
a
soft rag, and the
inside
of the
idler wheel bearings and
the outside of the spindle bearings.
Place about
a
teaspoonful of
fine -oil
or
lathe spindle oil
in the
center spindle bearing and
a
few drops in each
of
the idler wheel bearings and reassemble the
equipment.
Caution should betaken
that oil
is
not conducted
to
the
inside rim of the turntable
as this will cause slippage.
This, of
course,
is
corrected
by
making sure there
is
no oil on
the top
of
each idler wheel bearing.
As
a
precaution, wipe them off with
a
soft rag.
After operating
the
turntable
a
minute
or two
immediately
foll6wing the oiling procedure, remove
the
turntable platter and
note
if
there
is
any oil on the inside
rim.
If
there
is,
it
should
be
wiped
off,
and likewise the idler wheels should then
be
wiped
clean because
if
there
is
oil on the inside rim of the platter,
there will
be
oil
on the
outside
of the
idler wheels.
MODE OF OPERATION
The
turntable
is
simple
in its design,
and the operator will imme-
diately recognize, by casual inspection, the mode
of
operation.
When the speed shift lever
is in
the center position, the
motor
is
turned off and
the
idler wheels are disengaged from the platter.
When the lever
is
turned
to
right
or left, the
turntable
is
operat-
ing at the speed pointed to on the
escutcheon plate, either
7$
RPM
and
33
-1/3 RPM on the CB -11, or 45 RPM and
33
-1/3 RPM on
the CB
-21.
The
microswitch
which turns on the motor
at
time of engaging the
speed lever
is
provided
so
that the operator will not possibly let
the motor come up to speed before engaging the idler wheels
to
the
turntable.
Though
in
emergencies, such
as
the
operator starting the
turntable
at the
wrong speed,
it
can
be
quickly changed
to the
other
speed
by
reversing
the speed
lever position.
This practice
is
not
recommended, as
it
creates extra pressure
on the
driver wheels and
morely adds
to
their wear, which under normal operations
in
indefinite.
It is
strongly urged
that the
practice
of
placing
the
turntable
in
operating condition
but
holding
the platter proper awaiting
a
cue,
not be
followed
by
operating personnel,
as
this simply allows the
motor
to drive
against
the
idler wheel and
it
is
possible
to
wear
an
indentation into the wheel.
As the turntable
is
provided with
a
felt
top,
where this practice
is desired,
the operators can
hold
the record,
allowing
the
turntable platter
to
spin underneath the
record.
The guide pin,
if
provided,
can be
removed
if
there
is
any
danger
of
defacing
the
record labels.
SUMMARY OF MECHANICAL OPERATION
The CB -11 and CB -21
Transcription Turntable Chassis
is so
con-
structed
in its
rugged design and simplicity that
it
will operate
for years with only normal
maintenance
and
occasional replacement
of the idler wheels.
It is
suggested
that
a
spare idler wheel be
purchased for your service stock
so
that no
inconvenience will
be
had where
the idler wheel might require replacing.
There
is
a
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