Chamberlain BILT B4643T User Manual

10
Assembly
STEP 2 Fasten the Rail to the Motor Unit
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of
the opener.
1. Insert a 1/4"-20 x 1-3/4" bolt into the cover protection bolt hole on the back end of the rail as
shown. Tighten securely with a 1/4"-20 lock nut. DO NOT overtighten.
2. Remove the bolts from the top of the motor unit.
3. Use the carton to support the front end of the rail.
4. Place the “U” bracket, flat side down onto the motor unit and align the bracket holes with the bolt
holes.
5. Fasten the “U” bracket with the previously removed bolts; DO NOT use any power tools. The use of
power tools may permanently damage the garage door opener.
Bolt
1/4"-20x1-3/4"
Lock Nut
1/4"-20
HARDWARE
Bolts (Mounted in the
garage door opener)
Bolt
Lock Nut
Cover Protection
Bolt Hole
“U” Bracket

Chamberlain BILT B4643T Specifications

General

Drive Type	Belt Drive
Horsepower	1/2 HP
Battery Backup	Yes
Smartphone Control	Yes
Connectivity	Wi-Fi
Remote Controls Included	2
Safety and Security Features	Rolling Code
Speed	7.0 in/sec
Motor	DC
Warranty	5 years on parts
Lighting	Dual LED lighting