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BRAKE
TORQUE
ADJUSTMENT
PROCEDURES
NOTE
The
brake
torque
is
actuated
mechanically.
Pressure
is set
by
the variable
spring
force.
While
making
this
measurement
and
adjustment,
be
careful
not
to bend
the
brake
bands.
As brake
torque
will
change
with
cleaning,
brake
drums
and brake
shoes
should
be
cleaned
only when
absolutely
necessary.
If
cleaning
is
required,
use
TEAC
cleaner
TZ-251B
only.
After
cleaning
operate
the
machine
for
some
time
before
performing
the below
procedures.
Brake
torque
adjustments
are
made
with
no
power
applied
to
the
unit.
Place
an
empty
4" hub
reel
on
the
left
reel
table,
and
fasten
one
end of a 30" length
of string
to the reel
anchor.
. Wind
several
turns
of string
counterclockwise
around
the
hub
and
attach
a suitable
spring
scale
to
the
free
end
of the
string.
Pull
the
spring
scale
away
from
the
reel,
making
sure
that
the
string
does
not
rub
the
reel
flanges.
Take
a reading
only when
the
reel
is
in steady
motion
since
the
force
required
to
overcome
static
friction
will
produce
a false,
excessively
high
initial
reading.
The
reading
should
be 1300
+100
g-cm
(1620
oz~inch).
If adjustment
is
required,
loosen
the
screw
in the
spring
mount
and
position
the brake
for
optimum
torque.
The
adjustment
of
the
right
brake
is the
same,
with
the
exception
that
rotations
are
clockwise.
BRAKE
BAND
MOUNT
M-0280
Fig.
6-4
Torque
Measurement
and
Adjustment
Location
IMPORTANT
The
difference
in torque
between
the
right
and
left
brake
should
be kept
within
50g-cm(0.7oz-inch).
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