S&C Mark V Circuit-Switchers Installation Manual page 20

Installation
With the drive-shaft crank in the fully Open
toggle position described, the blade crank-arm
at the top of the brain should rest against its
open stop, thus assuring a positive Closed and
Latched position of the interrupter. See Figure
15. Do not attempt to adjust this stop. The stop
is factory-set to provide the travel necessary to
achieve positive latching of the brain as well as
tripping simultaneity.
Should the blade crank-arm fail to meet its
open stop, readjust as follows:
(a) Loosen the four cap screws fastening the
brain to the rotating insulator.
(b) Install the ½–13 X 2 ¾-inch positioning bolt,
flat washer, and nut in the adjustment-holding
device under the brain, as shown in Figure 5
on page 12. Tighten the nut securely so the
two mating surfaces are drawn together.
(c) Securely tighten the four cap screws fasten-
ing the brain to the rotating insulator.
(d) Remove the positioning bolt installed in (b).
20 S&C Instruction Sheet 711-510
Insulator
Leveling nuts
Figure 13� Leveling nuts on base of jaw-contact insulator�
Toggle loading
snubbers
Figure 14� Toggle loading snubbers, closed position�
Blade
crank arm
Open stop
Figure 15� Top of brain, blade crank arm stop� Open
position�