Genie 39276R.S Use and care manual

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:
• Unplug harness from top of powerhead.
• Remove two screws securing BBU to rear of powerhead.
• Tilt BBU up and slide mounting brackets out.
• Set BBU aside. FIG. 1.
4. Remove lens cover(s) by pressing top tabs down and slide lens
cover(s) out. Remove light bulbs. FIG. 2.
5. 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.
6. Remove clevis pin and hairpin from door arm assembly. FIG. 4.
7. Remove opener from mounting hardware and set opener assembly on clean work surface.
Idler Pulley Replacement
39350502958
WARNING
BE SURE ELECTRICAL POWER HAS BEEN DISCONNECTED FROM THE INPUT POWER LINES PRIOR TO REMOVING THE MOTOR COVER.
!
WARNING
ANY AND ALL REPAIRS MADE TO THIS UNIT MUST BE PERFORMED WITH THE DOOR DISCONNECTED FROM THE OPENER AND IN THE
CLOSED POSITION.
!
06/2015
This repair will require removal of the unit from it’s mounting hardware and repair made on a bench or oor. Refer to your
Owners Manual 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.

8. Remove Idler Pulley from rail assembly.
• Disconnect carriage by pulling emergency release handle down from turnbuckle and slide out of the way. (a)
• Loosen turnbuckle lock-nuts. (7/16”wrench) (b)
• Hold chain/belt and rotate turnbuckle clockwise until threaded ends are free. (c)
• Pull chain/belt out from front idler pulley.(d)
• Remove hairpin, clevis pin and idler pulley. (e)
• Install replacment Idler pulley, clevis pin, and hairpin.
• Feed chain/belt through idler pulley. Ensure chain/belt is not twisted or bound.
a
Hold Hold
b
c
d e

9. Install chain/belt rail assembly:
• Install turnbuckle with “door” end arrow onto the gold threaded end by rotating counter-clockwise one full turn. (a)
• Disengage carriage assembly by rotating release handle downward and insert turnbuckle through the carriage as shown.
Ensure chain/belt is not twisted or bound. (b)
• Insert silver threaded shaft into the turnbuckle and rotate turnbuckle counter-clockwise one full turn. (c)
• Hold chain/belt and rotate turnbuckle with thumbs counter-clockwise until chain/belt is tensioned properly. Measure chain/
belt tension on opposite side of rail until 1/4” from bottom of rail. (d)
• Once proper tension has been established, hold turnbuckle in place with a 7/16” or adjustable wrench. Tighten both tension
nuts with a 7/16” wrench. (e)
10. Reinstall opener assembly to mounting hardware.
11. Reinstall door arms in reverse of step 6.
12. Install wall control and Safe-T-Beam wires.
13. Install light bulbs and lens cover(s).
14. Plug opener in.
15. Operate opener and test all safety
features. Refer to owners manual or
visit www.GenieCompany.com
16. Install BBU, if equipped. Plug BBU
harness into top of powerhead.
NOTE: Limits may require
reprogramming. Refer to your owners
manual.
Tighten Locknuts
against the Turnbuckle
Hold
Hold
1/4”
gap
a
b
c
d
e