Dual 1010 - Turntable does not run, when unit plugged in and Start button operated; Turntable does not come up to speed

Motor pulley for two-pole motor
50 cycle: Part No. 12G-U45
60 cycle: Part No. 12G-U55
The motor pulley is secured to the motor by means of a set
screw. When the pulley is changed, care must be taken that
it is set to the correct height, i. e., with the drive wheel in
the middle of the appropriate pulley stop.
The motor field is mounted before the stator is riveted. For
this reason, the complete stator must be replaced when a
winding becomes defective.
The turntable is driven by means of the drive wheel (86),
which, to prevent damage to its friction surfaces, automatically
disengages in the “off position. Setting the turntable speed
to 16%, 3343, 45 and 78 r.p.m. is accomplished by raising
or lowering the drive wheel to the corresponding step of the
motor pulley.
Similarly, moving the speed change knob (7) causes the
switch segment (93) to rotate. The grooves in the switch
segment guide the rocker assembly (91) on which the drive
wheel is mounted. The drive wheel is thus lifted vertically
from the motor pulley and placed in the desired position.
Trouble shooting:
Symptom Cause
Turntable does not run, when unit
a) Current path to motor
Fig. 4 Turntable speeds and drive wheel shift mechanism
17, 86) 89) 125) 121 + 9 13 9
Remedy
a) Check connections at switch plate and voltage
plugged in and “Start" button interrupted selector
operated
Turntable does not come b) Drive wheel (86) not in contact 6) Check rocker assembly (91)
up to speed with turntable
c) Motor pulley (96) loose
a) Motor pulley does not
correspond to local line
frequency
b) Slippage between drive
wheel (86) and motor pulley
(96)
c) Friction in motor or drive wheel
bearings
d) The vertical position of the
motor pulley (96) does not
correspond with the speed
setting
c)
b
oS
c)
qd)
Tighten motor pulley (96)
Change motor pulley
Clean friction surface of drive wheel (86) and
motor pulley. Change drive wheel, if necessary.
Clean bearings and relubricate per lubrication chart
Loosen set screw and correct motor pulley height
so that drive wheel is ‘in the center of the
appropriate pulley step. Then tighten set screw.