S&C Mark VI Instructions For Installation Manual page 21

Step 30
The fl exible couplings are pre-installed on the
gearbox and Mark VI CS-1A Switch Operator.
If required, attach the fl exible coupling to the
output shaft of the switch operator and to
the input coupling of the gearbox using the
following procedure:
a. Thread the flexible coupling attachment
bolts through the fl exible coupling plate and
through the coupling fl ange.
b. Tighten the bolts to draw the fl exible plate
fl ush against the fl ange; this will deform the
threads in the fl exible plate, resulting in a
binding, nonslip connection.
c. Install and tighten the self-locking nuts. DO
NOT use lockwashers with the fl exible cou-
pling attachment bolts. See Figure 26.
If universal couplings are specified on the
catalog drawing instead of flexible couplings,
use the same installation procedure.
Step 31
Before installing the vertical shaft, make sure
that the cutting tips of the piercing set screws
do not protrude through the clamp.
Loosely fit the vertical shaft section between
the gearbox and operator coupling assemblies.
The vertical shaft should extend slightly past
the flange end of each clamp. See Figure 27. If
the shaft does not seat correctly, or is too long
or short, re-check the mounting height of the
Mark VI CS-1A Switch Operator and re-adjust
if necessary.
NOTICE
Shaft sections are cut to the appropriate
length at the fatory. Carefully examine
and measure all sections of shaft
before cutting any of the shaft sections.
The shaft sections can be trimmed using a
pipe cutter.
Step 32
With the vertical shaft inserted into the
couplings, tighten the clamp bolts equally
so that the clamp pulls down evenly on the
couplings.
When the vertical shaft is seated properly
in both the gearbox and operator couplings,
tighten the piercing set screws, piercing the
shaft and continue turning until a firm resis-
tance is felt. See Figure 28.
Attachment bolts
Figure 26. Attach the plate to the output shaft fl ange.
Clamp bolts
Figure 27. Insert the vertical shaft sections between the couplings. Fasten
the clamp to the couplings.
Figure 28. Tighten the piercing set screws.
21
INSTALLATION
Coupling fl ange
Flexible coupling
plate
Vertical shaft
Clamp
Piercing set
screws
712-502