®

Model 7806CB

 

EIGHT-FOOT SCREW DRIVE

 

RAIL EXTENSION KIT

OWNER’S INSTRUCTIONS

This kit should be installed prior to installation of your garage door opener. Attach the extension rail after fastening the existing rail to the power unit. See Assembly Section of your owner’s manual, then continue with step 3 below.

In an existing installation, the trolley must be in down (closed) position during assembly and installation. The rail/opener assembly must be taken down and the limits must be readjusted after re-installation.

PROCEDURE

1.Place rail/opener assembly on a flat surface.

2.Remove the rail brackets at the end of the existing rail and set aside (Figure 1).

3.Connect the extension rail to the end of rail (Figure 2):

•Secure rails together with braces and bolts.

•Tighten all hex bolts.

4.Reattach the rail brackets to the end of the extension rail.

5.Replace the emergency release rope that came with the opener with the new, longer replacement rope.

6.Install the opener following the instructions in your owner’s manual, but stop before connecting the door arm to the outer trolley.

7.Reposition the inner trolley as follows:

•Pull the emergency release handle to disconnect the outer trolley from the inner trolley.

•Connect power to the opener (be sure the safety reverse sensor is connected).

•Refer to the Adjustment Section in your opener’s manual, and adjust the travel limits until the inner trolley is about 3/4" (19 mm) from the rail joint (Figure 3).

8.With the inner trolley at this new location, complete the final Installation step in your owner’s manual to connect the door arm and re-engage the trolley.

9.Complete all remaining adjustments of your opener, according to your owner’s manual.

WARNING

To prevent possible SERIOUS INJURY or DEATH:

•Be sure door is CLOSED and

•Disconnect power to opener before proceeding.

Figure 1. Remove rail brackets.

Rail Brackets

Hex Bolt

1/4-20 x 7/16"

Rail

Hex Bolt 1/4-20x7/16"

Figure 2. Connect both rails.

 

 

Rail Support Brace

 

Extension Rail

 

 

 

Figure 3. Reposition the inner trolley.

 

Inner Trolley position

 

after adjustment

Header Wall

Rail Support Brace

Disconnected

Outer Trolley

Extension Rail

 

 

3/4"

 

 

(19 mm)

Inner Trolley position

 

 

before adjustment

 

© 2007, The Chamberlain Group, Inc.

114A3369

All Rights Reserved