Chamberlain HD920EV Manual page 8

Assembly
3 Install the pulley
HARDWARE
H3
H2
Bolt
Bolt 1/4"-20x1-3/4"
H6
H4
Nut 3/8"
Lock Nut 1/4"-20
H7
Lock Washer 3/8"
3.1
Lay the belt beside the rail, as shown.
Grasp the end with the hooked trolley
connector and pass approximately 12" (30
cm) of belt through the window. Keep the
ribbed side toward the rail, and allow it to
hang.
3.2
Remove the tape from the pulley. The
center should be greased, if not, regrease
the center of the pulley.
3.3
Insert the pulley into the window of the
front rail.
3.4
Insert the bolt (H3) into the rail and pulley.
Tighten securely with the lock washer (H7)
and nut (H6).
3.5
Rotate the pulley to be sure it spins freely.
3.6
Insert the bolt (H2) into the hole shown
and fasten with the lock nut (H4).
H2
H3
H6
8
Screwdriver
Pulley
H7
Trolley
H4
Connector
Rail