S&C Mark VI Instructions For Installation Manual page 24

INSTALLATION
Step 37
Hook the headhook onto the operating shaft
pin. The headhook should hang securely from
the operating shaft. Turn the motor until the
mounting bosses align with the holes in the
mounting brackets. See Figure 32. Using the
four ¹⁄₂ –13
1¹⁄₄ stainless-steel hex-head cap
screws and fl at washers furnished, fasten the
motor to the brackets. Tighten the screws to
between 40 and 50 ft.-lbs. See Figure 33.
If engaging the headhook with the operating
shaft is difficult, turn the operating shaft coun-
terclockwise until it stops, approximately one
to four turns. Then turn the shaft clockwise
¹⁄₄-turn. The headhook should engage easily
with the operating shaft.
Retighten any of the nuts loosened in
Step 36.
712-502
Pin
Figure 32. Attach the motor to the operating shaft.
Figure 33. Secure the motor to the motor brackets.
24
Operating shaft
Headhook
Pin
¹⁄₂ –13
1¹⁄₄ hex-head
stainless-steel cap
screws