ADS Environmental Services Model 4000 530017 A0 - Manual (Page 34)

Monitor and Sensor Installation 3-11
18. Tighten the screw through the hole using a Phillips-head
screwdriver while holding the hex nut with a ½-inch (13 mm)
nut driver.
Tightening the spreader mechanism screw and hex nut
19. Insert the second spreader mechanism screw through the
following hole based on the ring type:
Overlapping Appropriate ring size adjustment hole on
the outside of the ring
Non-overlapping Last hole on the other free end of the
ring (inserting the screw from the outside of the ring)
20. Slip the large washer onto the screw on the inside of the ring.