S&C Instruction Sheet 761-525 21
Installation
STEP 23.
When satisfactory travel adjustment of the
operating handle and switch have been attained,
torque the nuts on the adjustable lever arm of
the interphase drive lever and the clamp bolt
on the rod guide (or interphase drive lever)
coupling to fi nal tightness. Then, tighten the
associated piercing set screws, piercing the
pipe, and continue turning until a fi rm resistance
is felt. See Figure 28.
NOTICE
After readjusting, be sure to retighten the
clamp bolt and piercing set screw on the
pipe coupling at the rod guide (or interphase
drive lever) coupling immediately above the
operating handle, the nuts on the adjustable
lever arm of the interphase drive lever, and
the clamp bolts and piercing set screws on
the interphase pipe couplings .
NOTICE
For the most favorable mechanical
advantage, the interphase drive lever
should be within 5 degrees of the 45-degree
position when the switch is in the
Open
position as well as in the
Closed position .
Figure 28. Torquing the nuts on the adjustable lever arm of the
interphase drive lever.
Adjustable lever arm