Dual 601 - Motor and Drive; Replacement of Motor Pulley

Fig. 2
Motor
and
Drive
102 12 10
127
1111
11
129
111
6
33 34 9
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Fig.
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Fig. 4
Motor
and
Drive
The turntable
platter and the changing
me—
chanism are
driven by an
eight—pole, syn—
chronous motor
suspended by
radially loca—
ted
elastic mounts and
having a very
small
stray
magnetic field
as well as
little Vi—
bration.
The speed of
the motor is a function
of line
voltage, temperature and
load variations.
Speed is
dependent on and
proportional
to
line
frequency. The motor
is adapted to
50 or
60 Hz power line
frequencies by
the
correct
choice of
motor
pulley.
Pulley for
50 Hz
Part.—No. 224 453
ISulley for 60 Hz
Part.—No.
234 454
The motor pulley
(129) is secured to
the
motor
shaft by two
set screws
(130).
The
drive is
linked to a
flywheel rotor be—
neath the
platter by a
precision—graund
belt
(34). When
replacing the
flat belt
(34) be
eure
that the precision—ground
surface of
the belt (dull finish)
closely contacts
pulley (129) and
the flywheel
rotor.
Platter
speeds of 33 1/3 and
45 rpm are ad—
justed by linking the
flat belt (34) to the
corresponding step of the
drive pulley (129)
(Fig. 3).
Corresponding to the actuation
of the speed
selector (12) the
changeover layer is
brought to the
appropriate
position of no—
minal speeds (33 or 45
rpm) via lauer (101)
and spring
lever. When the
unit is electri—
cally shut off
the changeover
lever is
blocked
by locking bar (9).
Consequently,
the speed is
only preselected.
After
switching on the unit and turning the plat—
ter (4) the pawl (9) disengages the
changeover layer, thus guiding the
Fiat
belt to appropriate step of the pulley (129)
Reacenment
of
Motor Pulkyir
1. Remove flat belt (34) from motor
pulley
(129) toothed belt from toothed belt
pulley II
(104).
2. Disengage tension spring (112) at shield
(116).
3. Undo adjusting nut
(108).
4. Pull—off the conter bearing assembly con—
sisting of the conter bearing, toothed
belt pulley (110), stop disk (109) and
toothed belt (127).
Aftention:
Do not remove stop disk
(109) from
toothed belt pulley I. For
correct ad—
justment of stop disk proceed
as follows:
Turn toothed belt
pulley I (110) with
toothed belt (34)
conterclockwise until
it stops at the counter bearing (116).
Then turn
quarter to half turn clockwise
Place stop disk
(109) such that the nose
(N)
touches the stop as shown in Fig. 2.
5. Loosen set screws (130 a and 130 b) and
remove motor pulley (129).
6. Place complete replacement motor pulley
on motor axle. Remove conical sleeve. Be
careful with the interior
distance bush—
ing. Adjust motor pulley
vertically (see
Fig. 1) and tighten set screws (130 a and
130 b) uniformly. Place conical sleeve
into the motor pulley (129).
7. Mount the complete bearing assembly, and
attach Fiat belt (34), toothed belt (127)
and tension spring. Mount adjusting nut
(10B).
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