S&C Mark V Circuit-Switchers Installation Manual page 21

STEP 3� With the hand-operation adapter, operate each
circuit-switcher pole-unit to its fully Closed
position. See Figure 16. The drive-shaft crank
should rest firmly in a toggle position against an
internal drive-shaft crank stop in the drive-shaft
assembly. As in the Open position, a positive-
toggle position of the drive-shaft crank should be
maintained by the force exerted on the rotating-
insulator lever by the toggle-loading snubber and
transmitted by the operating link.
Although it is desirable that the blade
crank-arm rest against its closed stop in the
fully Closed position, a gap not greater than
1/32 inch (0.8 mm) can be tolerated in the Closed
position only.
Blade
crank arm
Closed
stop
Figure 16� Top of brain, blade crank arm stop� Closed
position�
Rotating-yoke
lock nut
Ball-joint
shaft
locking nut
Figure 17� Blade mechanism overview�
S&C Instruction Sheet 711-510
Installation
Rotating
yoke
Rotating-
yoke
coupling
pin
Interrupter
target
21