Chamberlain 248730 Garage Door Opener User Manual


 
8
Attach Chain To Trolley
Threaded Shaft
Insert Trolley Threaded
Shaft into Round Hole in
Trolley
Attach Nut and Lock
Washer to Trolley
Threaded Shaft
Tighten the Chain
Desired Chain Tension
ALL HARDWARE SHOWN ACTUAL SIZE
To avoid possible SERIOUS INJURY to fi ngers:
• Securely attach chain spreader.
• NEVER connect garage door opener to power source
until instructed to do so.
Route Chain/Cable Around Rail
Assembly and Motor Unit Sprocket
Assembly of your opener is now complete.
8
Leave chain/cable
inside carton to
prevent kinking
B4
Master Link
Clip-On Spring
B1
Trolley
Threaded
Shaft
B1
Trolley
Threaded
Shaft
C2
Nut
C3
Lock
Washer
C3
Lock
Washer
C2
Nut
A2 Chain
Mid Length of RailBase of Rail
1/4" (6 mm)
B1
Trolley
Threaded
Shaft
B4
Master
Link Bar
Chain and
Cable in
Dispensing
Carton
Cable
Chain
Motor Unit
Sprocket
A2
9
12
10 11
Threaded Trolley Shaft
B1
Master Link
B4
Nut Lock Washer
C2 C3