Teac A-3340 - Page 17

BRAKE
TORQUE
—————
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
adjustments
are
made
with
no
power
connected
to
the
equipment.
procedure
for
check
and
adjustment
1.
Place
an
empty
2"
hub
reel
on
the
left
reel
table,
and
fasten
one
end
of
a
30"
length
of
string
to
the
reel
anchor.
2.
Wind
several
turns
of
string
counterclockwise
around
the
hub
and
attach
a
suitable
spring
scale
to
the
free
end
of
the
string.
Slowly
draw
the
spring
scale
away
from
the
reel,
making
sure
that
the
string
does
not
rub
against
the
reel
flanges.
3.
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.
4, The reading should be 1.8 kg-cm +0.1(25 oz-inch).
5.
If
different,
brake
torque
will
normally
be
adjusted
by
means
of
the
A
&
B
adjustment
screws,
loosen
locking
screw
C,
adjust
A
&
B
for
proper
torque
value,
retighten
screw
C.
NOTE
The difference in readings between the right and left
brakes
should
be
kept
within
50
g-cm
(0.7
oz-inch).
Fig.
6-4
Torque
Measurement
&
Adjustment
Location
-Brake-