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1.  Pull emergency release cord on carriage to disengage opener to 

close door, if necessary. (If unable to lower door using opener, 

use extreme caution manually closing door. Before pulling 

emergency release cord, make certain people and objects are 

clear of door opening.)

2.  Unplug opener power cord from power receptacle.

3.  Remove Battery Backup (BBU) from powerhead, if equipped:

4.  Unplug harness from top of powerhead.

5.  Remove two screws securing BBU to rear of powerhead. 

6.  Tilt BBU up and slide mounting brackets out. FIG. 1.

7.   Set BBU aside. 

8.  Remove lens cover(s) by pressing top tabs down and slide lens 

cover(s) out. Remove light bulbs. FIG. 2. 

9.  Remove wall control and Safe-T-Beam® wires from terminal 

block located on side  of two bulb models or rear of one bulb 

models FIG. 3. Use small common screwdriver to press in on 

orange tabs while gently pulling wires from block. Mark wires to 

help facilitate replacement.

10.  Remove clevis pin and hairpin from door arm assembly. FIG. 4.

11.  Remove opener from mounting hardware and set opener assembly on clean work surface. 

Belt or Chain Rail Replacement

39413503026

 WARNING

BE SURE ELECTRICAL POWER HAS BEEN DISCONNECTED FROM THE INPUT POWER LINES PRIOR TO REMOVING THE POWERHEAD. 

!

 WARNING

 

ANY AND ALL REPAIRS MADE TO THIS UNIT MUST BE PERFORMED WITH THE DOOR DISCONNECTED FROM THE OPENER AND IN THE 

CLOSED POSITION. 

!

10/2015

This repair will require removal of the unit from its mounting hardware and repair made on a bench or floor. Refer to your 

Owners Manual/Installation Poster for proper assembly and carefully read and understand all warnings and cautions 

pertaining to your unit. 

FIG. 2.

Parts removed for clarity

FIG. 1.

FIG. 3.

Two Bulb Model

One Bulb Model

Antenna

FIG. 4.

Antenna

For use on models: 1035, 2035, 2036, 2055, 3035, 3055, 7035, 7055 ONLY!

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