Chamberlain HD920EV Garage Door Opener User Manual


 
9
Install the belt
4
4.1 Pull the belt around the pulley and
toward the trolley. The ribbed side
must contact the pulley.
4.2 Hook the trolley connector into the
retaining slot on the trolley as shown.
4.3 With the trolley against the
screwdriver, dispense the remainder of
the belt along the rail length toward the
motor unit and around the sprocket.
The sprocket teeth must engage the
belt.
4.4 Check to make sure the belt is not
twisted. Connect the trolley threaded
shaft with the master link (H5).
Push pins of master link bar
through holes in end of belt and
trolley threaded shaft.
Push master link cap over pins and
past pin notches.
Slide clip-on spring over cap and
onto pin notches until both pins are
securely locked in place.
4.5 Insert the trolley threaded shaft
through the hole in the trolley.
HARDWARE
H5
Master Link
H1
Threaded Shaft
H5
H1
H5