Assembly; Assemble The Rail - Chamberlain Power Drive PD420D Owner's Manual

ASSEMBLY STEP 1

Assemble the Rail

To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
1. Turn the opened rail carton upside down and
empty its contents onto a level work surface.
2. Unfold the rails, taking care to avoid kinking the
screw rod joint.
3. Rotate the rail sections so that the flat side is down
and the screw side is up for all three lengths. Keep
it clean and free of debris while you are working.
Rail
Support
Braces
Rail Assembly
Carton
Remove
Cardboard
Packing
NOTE: During assembly, avoid pulling the rail section
housing the trolley rack away from the screw rod.
The rack is factory set about 9" (23 cm) from the end
of the screw rod to the center of the rack.
If the plastic liner slides part way out during
assembly, simply push it back in.
Trolley Rack
Door End Rail
To prevent INJURY from pinching, keep hands and
fingers away from the joints while assembling the rail.
Straight
Door Arm
Extend
End Rails
Outward
Rotate
Center Rail
8
WARNING
CAUTION
Remove
Extend
Cardboard Packing
End Rails
Outward
Center
Rail
Trolley Rack
Rail Assembly Chassis Assembly
Hardware Bag Hardware Bag
Sprocket End Rail
Rail
Sprocket