Preparation - Chamberlain BC550C Owner's Manual

Preparation

Hardware
ASSEMBLY
1/4"-20x1-3/4"
Threaded
Shaft with
Spring
Trolley Nut
Lock Washer 3/8"
Bolt
Bolt
Master Link
Hex Screw #8x3/8" (3)
(packed with the
sprocket cover)
Lock Nut
Nut 3/8"
1/4"-20
INSTALLATION
Lag Screw 5/16"-9x1-5/8" (4)
Clevis Pin 5/16"x1-1/2"
Clevis Pin 5/16"x1"
Hex Bolt 5/16"-18x7/8" (4)
Lock Washer
Nut
5/16"-18 (4)
5/16"-18 (4)
5
Wing Nut
1/4"-20 (2)
Self-Threading Screw
1/4"-14x5/8" (2)
Clevis Pin 5/16"x1-1/4"
Carriage Bolt
1/4"-20x1/2" (2)
Ring
Fastener (3)
DOOR CONTROL
Drywall Anchors (2)
Screw 6-32x1" (2)
Screw 6ABx1" (2)
Insulated Staples
(Not Shown)