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{"id":1716147716211,"title":"Belt Drive Sprocket- 39278R.S","handle":"belt-drive-sprocket-39278r-s","description":"\u003cp\u003e\u003cspan\u003eThis Belt Drive Sprocket sits on the shaft on top of the power head. The belt goes around the sprocket and the teeth on it grip the chain so it stays on track. This is used on multiple Genie model garage door openers that have the belt drive rail system. (See below) \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with Models; 2055, 3053, 3055, 7055, SilentMax Connect, StealthDrive 750, SilentMax 750, SilentMax 550, QuietLift 550, StealthLift 500\u003c\/li\u003e\n\u003cli\u003eIf you do not see your model on this list and have questions please contact Genie for compatibility questions\u003c\/li\u003e\n\u003cli\u003eGenuine Genie Replacement Part \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- TABS --\u003e\n\u003ch5\u003eReviews\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eInstallation Instructions\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions.pdf?4874\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePDF Instructions for replacing the 39278R.S Belt Drive Sprocket Assembly\u003c\/a\u003e \u003c\/p\u003e\n\u003cp\u003eBelt Sprocket Assembly Replacement Instructions for the 39278R.S \u003c\/p\u003e\n\u003cp\u003eThis repair will require removal of the unit from it’s mounting hardware and repair made on a bench or floor. Refer to your Owners Manual for proper assembly and carefully read and understand all warnings and cautions pertaining to your unit.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003eWARNING\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eBE SURE ELECTRICAL POWER HAS BEEN DISCONNECTED FROM THE INPUT POWER LINES PRIOR TO REMOVING THE MOTOR COVER.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003eWARNING\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eANY AND ALL REPAIRS MADE TO THIS UNIT MUST BE PERFORMED WITH THE DOOR DISCONNECTED FROM THE OPENER AND IN THE CLOSED POSITION.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e1. Pull emergency release cord on the carriage to disengage opener to close the garage door if necessary. (If unable to lower door using the garage door opener, use extreme caution manually closing the garage door. Before pulling the emergency release cord, make certain people and objects are clear of the garage door opening.)\u003c\/p\u003e\n\u003cp\u003e2. Unplug opener power cord from power receptacle.\u003c\/p\u003e\n\u003cp\u003e3. Remove Battery Backup (BBU) from powerhead if equipped:\u003cbr\u003e• Unplug harness from top of powerhead.\u003cbr\u003e• Remove two screws securing BBU to the rear of the powerhead.\u003cbr\u003e• Tilt BBU up and slide mounting brackets out.\u003cbr\u003e• Set BBU aside. FIG. 1.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39342R.S_Transformer_Replacement_figure_1_large.png?v=1563806315\" alt=\"Genie 39277R.S Sprocket replacement instructions \"\u003e\u003c\/p\u003e\n\u003cp\u003e4. Remove lens cover(s) by pressing top tabs down and slide lens cover(s) out. Remove light bulbs. FIG. 2.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39342R.S_Transformer_Replacement_figure_2_large.png?v=1563806350\" alt=\"Genie garage door opener sprocket replacement instructions \"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e5. Remove wall control and Safe-T-Beam® wires from the terminal block located on side of two bulb models or rear of one bulb models FIG. 3. Use a small common screwdriver to press in on orange tabs while gently pulling wires from the block. Mark wires to help facilitate replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39342R.S_Transformer_Replacement_figure_3_large.png?v=1563806684\" alt=\"Genie garage door opener terminal strip \"\u003e\u003c\/p\u003e\n\u003cp\u003e6. Remove clevis pin and hairpin from door arm assembly. FIG. 4.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_figure_4_large.png?v=1563812103\" alt=\"Genie garage door opener removing the clevis pin and hairpin from the door assembly \"\u003e\u003c\/p\u003e\n\u003cp\u003e7. Remove opener from mounting hardware and set opener assembly on clean work surface.\u003c\/p\u003e\n\u003cp\u003e 8. Remove rail assembly from powerhead:\u003cbr\u003e• On belt drive models, remove two screws and belt retainer cover from rail assembly. FIG. 5.\u003cbr\u003e• Remove four rail mounting screws and slide rail assembly off of the motor shaft. FIG. 6.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_figure_5_large.png?v=1563812162\" alt=\"Genie garage door opener replacing the sprocket part 39277R.S\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_figure_6_large.png?v=1563812190\" alt=\"39277R.S Sprocket replacement for Genie garage door openers \"\u003e\u003c\/p\u003e\n\u003cp\u003e9. Remove the old belt Sprocket assembly from the rail assembly.\u003cbr\u003e• Pull the emergency release handle down to disconnect carriage and slide out of the way. (a)\u003cbr\u003e• Loosen turnbuckle lock-nuts. (7\/16” wrench) (b)\u003cbr\u003e• Hold chain\/belt and rotate turnbuckle clockwise until threaded ends are free. (c)\u003cbr\u003e• Pull the belt away from sprocket assembly.\u003cbr\u003e• Remove and replace belt sprocket assembly 39278R.S. (d)\u003cbr\u003e• Feed the belt around the motor sprocket. Ensure the belt is not twisted or bound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_grande.png?v=1563812249\" alt=\"Genie replacement sprocket instructions 39277R.S\"\u003e\u003c\/p\u003e\n\u003cp\u003e10. Install the belt rail assembly:\u003cbr\u003e• Install turnbuckle with “door” end arrow onto the gold-threaded end by rotating counter-clockwise one full turn. (a)\u003cbr\u003e• Disengage carriage assembly by rotating release handle downward and insert turnbuckle through the carriage as shown.\u003cbr\u003eEnsure the belt is not twisted or bound. (b)\u003cbr\u003e• Continue routing the chain\/belt assembly until turnbuckle is near the middle of the rail. Insert the silver threaded shaft into the\u003cbr\u003eturnbuckle and rotate turnbuckle counter-clockwise one full turn. (c)\u003cbr\u003e• Hold the belt and rotate turnbuckle with thumbs counter-clockwise until the belt is tensioned properly. Measure the belt tension on the opposite side of the rail until 1\/4” from the bottom of the rail. (d)\u003cbr\u003e• Once proper tension has been established, hold turnbuckle in place with a 7\/16” or adjustable wrench. Tighten both tension\u003cbr\u003enuts with a 7\/16” wrench. (e)\u003cbr\u003e• Reinstall rail assembly to the powerhead. FIG.6.\u003cbr\u003e• Reinstall belt guard if applicable. FIG. 5.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_2_grande.png?v=1563812316\" alt=\"39277R.S Genie garage door opener chain sprocket replacement \"\u003e\u003c\/p\u003e\n\u003cp\u003e11. Reinstall opener assembly to mounting hardware.\u003c\/p\u003e\n\u003cp\u003e12. Reinstall door arms in reverse of step 6.\u003c\/p\u003e\n\u003cp\u003e13. Install wall control and Safe-TBeam wires.\u003c\/p\u003e\n\u003cp\u003e14. Install light bulbs and lens cover(s).\u003c\/p\u003e\n\u003cp\u003e15. Plug opener in.\u003c\/p\u003e\n\u003cp\u003e16. Reset limits and fully test opener. Refer to the owners manual or visit\u003cbr\u003ewww.GenieCompany.com\u003c\/p\u003e\n\u003cp\u003e17. Install BBU, if equipped. Plug BBU harness into the top of the powerhead.\u003c\/p\u003e\n\u003c!-- \/TABS --\u003e","published_at":"2018-10-15T10:29:28-04:00","created_at":"2018-10-15T10:34:02-04:00","vendor":"The Genie Company","type":"Service Parts","tags":["Gears \u0026 Sprockets"],"price":2099,"price_min":2099,"price_max":2099,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":16939108696179,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"39278R.S","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Belt Drive Sprocket- 39278R.S","public_title":null,"options":["Default Title"],"price":2099,"weight":136,"compare_at_price":null,"inventory_quantity":999,"inventory_management":"shopify","inventory_policy":"continue","barcode":""}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/products\/39278R.S.JPG?v=1540409984"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/products\/39278R.S.JPG?v=1540409984","options":["Title"],"content":"\u003cp\u003e\u003cspan\u003eThis Belt Drive Sprocket sits on the shaft on top of the power head. The belt goes around the sprocket and the teeth on it grip the chain so it stays on track. This is used on multiple Genie model garage door openers that have the belt drive rail system. (See below) \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with Models; 2055, 3053, 3055, 7055, SilentMax Connect, StealthDrive 750, SilentMax 750, SilentMax 550, QuietLift 550, StealthLift 500\u003c\/li\u003e\n\u003cli\u003eIf you do not see your model on this list and have questions please contact Genie for compatibility questions\u003c\/li\u003e\n\u003cli\u003eGenuine Genie Replacement Part \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- TABS --\u003e\n\u003ch5\u003eReviews\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eInstallation Instructions\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions.pdf?4874\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePDF Instructions for replacing the 39278R.S Belt Drive Sprocket Assembly\u003c\/a\u003e \u003c\/p\u003e\n\u003cp\u003eBelt Sprocket Assembly Replacement Instructions for the 39278R.S \u003c\/p\u003e\n\u003cp\u003eThis repair will require removal of the unit from it’s mounting hardware and repair made on a bench or floor. Refer to your Owners Manual for proper assembly and carefully read and understand all warnings and cautions pertaining to your unit.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003eWARNING\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eBE SURE ELECTRICAL POWER HAS BEEN DISCONNECTED FROM THE INPUT POWER LINES PRIOR TO REMOVING THE MOTOR COVER.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003eWARNING\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eANY AND ALL REPAIRS MADE TO THIS UNIT MUST BE PERFORMED WITH THE DOOR DISCONNECTED FROM THE OPENER AND IN THE CLOSED POSITION.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e1. Pull emergency release cord on the carriage to disengage opener to close the garage door if necessary. (If unable to lower door using the garage door opener, use extreme caution manually closing the garage door. Before pulling the emergency release cord, make certain people and objects are clear of the garage door opening.)\u003c\/p\u003e\n\u003cp\u003e2. Unplug opener power cord from power receptacle.\u003c\/p\u003e\n\u003cp\u003e3. Remove Battery Backup (BBU) from powerhead if equipped:\u003cbr\u003e• Unplug harness from top of powerhead.\u003cbr\u003e• Remove two screws securing BBU to the rear of the powerhead.\u003cbr\u003e• Tilt BBU up and slide mounting brackets out.\u003cbr\u003e• Set BBU aside. FIG. 1.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39342R.S_Transformer_Replacement_figure_1_large.png?v=1563806315\" alt=\"Genie 39277R.S Sprocket replacement instructions \"\u003e\u003c\/p\u003e\n\u003cp\u003e4. Remove lens cover(s) by pressing top tabs down and slide lens cover(s) out. Remove light bulbs. FIG. 2.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39342R.S_Transformer_Replacement_figure_2_large.png?v=1563806350\" alt=\"Genie garage door opener sprocket replacement instructions \"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e5. Remove wall control and Safe-T-Beam® wires from the terminal block located on side of two bulb models or rear of one bulb models FIG. 3. Use a small common screwdriver to press in on orange tabs while gently pulling wires from the block. Mark wires to help facilitate replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39342R.S_Transformer_Replacement_figure_3_large.png?v=1563806684\" alt=\"Genie garage door opener terminal strip \"\u003e\u003c\/p\u003e\n\u003cp\u003e6. Remove clevis pin and hairpin from door arm assembly. FIG. 4.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_figure_4_large.png?v=1563812103\" alt=\"Genie garage door opener removing the clevis pin and hairpin from the door assembly \"\u003e\u003c\/p\u003e\n\u003cp\u003e7. Remove opener from mounting hardware and set opener assembly on clean work surface.\u003c\/p\u003e\n\u003cp\u003e 8. Remove rail assembly from powerhead:\u003cbr\u003e• On belt drive models, remove two screws and belt retainer cover from rail assembly. FIG. 5.\u003cbr\u003e• Remove four rail mounting screws and slide rail assembly off of the motor shaft. FIG. 6.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_figure_5_large.png?v=1563812162\" alt=\"Genie garage door opener replacing the sprocket part 39277R.S\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_figure_6_large.png?v=1563812190\" alt=\"39277R.S Sprocket replacement for Genie garage door openers \"\u003e\u003c\/p\u003e\n\u003cp\u003e9. Remove the old belt Sprocket assembly from the rail assembly.\u003cbr\u003e• Pull the emergency release handle down to disconnect carriage and slide out of the way. (a)\u003cbr\u003e• Loosen turnbuckle lock-nuts. (7\/16” wrench) (b)\u003cbr\u003e• Hold chain\/belt and rotate turnbuckle clockwise until threaded ends are free. (c)\u003cbr\u003e• Pull the belt away from sprocket assembly.\u003cbr\u003e• Remove and replace belt sprocket assembly 39278R.S. (d)\u003cbr\u003e• Feed the belt around the motor sprocket. Ensure the belt is not twisted or bound.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_grande.png?v=1563812249\" alt=\"Genie replacement sprocket instructions 39277R.S\"\u003e\u003c\/p\u003e\n\u003cp\u003e10. Install the belt rail assembly:\u003cbr\u003e• Install turnbuckle with “door” end arrow onto the gold-threaded end by rotating counter-clockwise one full turn. (a)\u003cbr\u003e• Disengage carriage assembly by rotating release handle downward and insert turnbuckle through the carriage as shown.\u003cbr\u003eEnsure the belt is not twisted or bound. (b)\u003cbr\u003e• Continue routing the chain\/belt assembly until turnbuckle is near the middle of the rail. Insert the silver threaded shaft into the\u003cbr\u003eturnbuckle and rotate turnbuckle counter-clockwise one full turn. (c)\u003cbr\u003e• Hold the belt and rotate turnbuckle with thumbs counter-clockwise until the belt is tensioned properly. Measure the belt tension on the opposite side of the rail until 1\/4” from the bottom of the rail. (d)\u003cbr\u003e• Once proper tension has been established, hold turnbuckle in place with a 7\/16” or adjustable wrench. Tighten both tension\u003cbr\u003enuts with a 7\/16” wrench. (e)\u003cbr\u003e• Reinstall rail assembly to the powerhead. FIG.6.\u003cbr\u003e• Reinstall belt guard if applicable. FIG. 5.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1470\/8272\/files\/39277R.S_AND_39278R.S_Sprocket_Replacement_Instructions_2_grande.png?v=1563812316\" alt=\"39277R.S Genie garage door opener chain sprocket replacement \"\u003e\u003c\/p\u003e\n\u003cp\u003e11. Reinstall opener assembly to mounting hardware.\u003c\/p\u003e\n\u003cp\u003e12. Reinstall door arms in reverse of step 6.\u003c\/p\u003e\n\u003cp\u003e13. Install wall control and Safe-TBeam wires.\u003c\/p\u003e\n\u003cp\u003e14. Install light bulbs and lens cover(s).\u003c\/p\u003e\n\u003cp\u003e15. Plug opener in.\u003c\/p\u003e\n\u003cp\u003e16. Reset limits and fully test opener. Refer to the owners manual or visit\u003cbr\u003ewww.GenieCompany.com\u003c\/p\u003e\n\u003cp\u003e17. Install BBU, if equipped. Plug BBU harness into the top of the powerhead.\u003c\/p\u003e\n\u003c!-- \/TABS --\u003e"}

Belt Drive Sprocket- 39278R.S

Product Description
$20.99
Maximum quantity available reached.

This Belt Drive Sprocket sits on the shaft on top of the power head. The belt goes around the sprocket and the teeth on it grip the chain so it stays on track. This is used on multiple Genie model garage door openers that have the belt drive rail system. (See below) 

  • Compatible with Models; 2055, 3053, 3055, 7055, SilentMax Connect, StealthDrive 750, SilentMax 750, SilentMax 550, QuietLift 550, StealthLift 500
  • If you do not see your model on this list and have questions please contact Genie for compatibility questions
  • Genuine Genie Replacement Part 
Sku: 39278R.S

PDF Instructions for replacing the 39278R.S Belt Drive Sprocket Assembly 

Belt Sprocket Assembly Replacement Instructions for the 39278R.S 

This repair will require removal of the unit from it’s mounting hardware and repair made on a bench or floor. Refer to your Owners Manual for proper assembly and carefully read and understand all warnings and cautions pertaining to your unit.

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.

1. Pull emergency release cord on the carriage to disengage opener to close the garage door if necessary. (If unable to lower door using the garage door opener, use extreme caution manually closing the garage door. Before pulling the emergency release cord, make certain people and objects are clear of the garage 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 the rear of the powerhead.
• Tilt BBU up and slide mounting brackets out.
• Set BBU aside. FIG. 1.

Genie 39277R.S Sprocket replacement instructions

4. Remove lens cover(s) by pressing top tabs down and slide lens cover(s) out. Remove light bulbs. FIG. 2.

Genie garage door opener sprocket replacement instructions

 

5. Remove wall control and Safe-T-Beam® wires from the terminal block located on side of two bulb models or rear of one bulb models FIG. 3. Use a small common screwdriver to press in on orange tabs while gently pulling wires from the block. Mark wires to help facilitate replacement.

Genie garage door opener terminal strip

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

Genie garage door opener removing the clevis pin and hairpin from the door assembly

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

 8. Remove rail assembly from powerhead:
• On belt drive models, remove two screws and belt retainer cover from rail assembly. FIG. 5.
• Remove four rail mounting screws and slide rail assembly off of the motor shaft. FIG. 6.

Genie garage door opener replacing the sprocket part 39277R.S

39277R.S Sprocket replacement for Genie garage door openers

9. Remove the old belt Sprocket assembly from the rail assembly.
• Pull the emergency release handle down to disconnect carriage 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 the belt away from sprocket assembly.
• Remove and replace belt sprocket assembly 39278R.S. (d)
• Feed the belt around the motor sprocket. Ensure the belt is not twisted or bound.

Genie replacement sprocket instructions 39277R.S

10. Install the 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 the belt is not twisted or bound. (b)
• Continue routing the chain/belt assembly until turnbuckle is near the middle of the rail. Insert the silver threaded shaft into the
turnbuckle and rotate turnbuckle counter-clockwise one full turn. (c)
• Hold the belt and rotate turnbuckle with thumbs counter-clockwise until the belt is tensioned properly. Measure the belt tension on the opposite side of the rail until 1/4” from the bottom of the 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)
• Reinstall rail assembly to the powerhead. FIG.6.
• Reinstall belt guard if applicable. FIG. 5.

39277R.S Genie garage door opener chain sprocket replacement

11. Reinstall opener assembly to mounting hardware.

12. Reinstall door arms in reverse of step 6.

13. Install wall control and Safe-TBeam wires.

14. Install light bulbs and lens cover(s).

15. Plug opener in.

16. Reset limits and fully test opener. Refer to the owners manual or visit
www.GenieCompany.com

17. Install BBU, if equipped. Plug BBU harness into the top of the powerhead.

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