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8 Tooth Chain Sprocket - 38415A.S

Product Description
$15.89
Maximum quantity available reached.

This 8 Tooth Chain Sprocket sits on top of the power head. The chain goes around the sprocket and the teeth on it grip the chain so it stays on track. The Chain Sprocket comes with DIY replacement instructions.  

  • Compatible with Genie Models: 1022, 1024, 2022, 2022-700, 2024 (with chain rails)
  • Genuine Genie factory replacement part
  • Includes Chain Sprocket, 2 Screws, 2 Nuts, and replacement instructions 
Sku: 38415A.S

38415A.S Chain Drive Sprocket Replacement Instructions 

 PDF Printable Instructions for replacing the 38415A.S Chain Sprocket 

Chain Drive Sprocket Replacement

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 door if necessary. (If unable to lower door using an opener, use extreme caution manually closing the door. Before pulling the emergency release cord, make certain people and objects are clear of the door opening.)

2. Unplug the garage door opener power cord from power receptacle.

3. Open lens cover by pressing outer tabs on both sides of the motor and swing down to remove light bulbs. FIG. 1.

38415A.S Genie Chain Sprocket replacement instructons, figure 1

4. Remove wall control and Safe-T-Beam wires from the terminal block located on the rear of opener FIG. 1A. Use a small common screwdriver to press in on orange tabs while gently pulling wires from the block. Mark wires to help facilitate replacement.

5. Remove the cotter pin & clevis from door arm to separate door from the opener. FIG. 2.

Genie Chain Sprocket 38415A.S replacement instructions, figure 2

 

6. Remove motor head and rail assembly from mounting brackets/hardware and set on a clean work surface or floor.

7. Remove the 3-5/16” bolts from rail to motor mount to remove the chain rail. FIG. 3.

Genie Chain Drive Sprocket Replacement Instructions (38415A.S), figure 3

 

8. Loosen 1/2” tension nut at header end of the rail to create slack in the chain/belt. FIG. 4.

Figure 4, replacing the chain drive sprocket 38415A.S, Genie garage door openers

 

9. Place scrap block of wood under the sprocket assembly and drill out the rivets holding the sprocket bracket to the rail with a #7 (.201) drill bit.

Genie 38415A.S Chain Replacement Sprocket

10. Remove screws from upper and lower brackets to separate the sprocket bracket assembly and remove the old sprocket.

11. Install replacement chain sprocket 38415A.S, with bushing to lower bracket.

12. Wrap chain/belt around the new sprocket.

13. Install sprocket guard and reinstall lower bracket screws.

14. Align bushing into the upper bracket and assemble over the sprocket.

38415A.S Genie replacement chain sprocket instructions

15. Reinstall screws into sprocket guard through upper bracket.

16. Use the supplied nuts and bolts to fasten bracket assembly to the rail.

17. Tension the chain/belt with the 1/2” tension nut. FIG. 4.

NOTE: Refer to the manual for proper tension. (1/8” gap between chain/belt and rail)

18. Assemble rail to the motor head. FIG. 3.

19. Install operator to mounting hardware. Refer to owners manual for reassembly if necessary.

20. Reinstall wall control and photocell wires. FIG. 1.

21. Reinstall Light Bulbs and close lens cover(s) and rear cover. FIG. 1.

22. Reattach door arm to the carriage with clevis and hairpin. FIG. 2.

23. Move door up or down to reengage carriage into chain/belt.

24. Refer to owners manual to reset up and down limits.

25. Perform complete safety check per owners manual.

QUESTIONS & ANSWERS

Ask a Question
  • Does this fit 3022 model ? Thank you

    No, it will not. The 3022 model garage door opener would use the 37559R.S Chain Sprocket.

  • How to remove chain sprocket on genie pro 1024? Do I need to drill the rivet that holds the sprocket housing? Does the kit includes the black plastic bushings that holds the sprocket in place in the housing plate m?

    You can view the replacement instructions for the 38415A.S chain sprocket here. If you need assistance you can also contact our Genie customer service at 1-800-354-3643. This 38415A.S includes:

    •  Chain Sprocket, 2 Screws, 2 Nuts, and replacement instructions. 

  • Do you ship Canada

    Yes, we do!

  • model 2024... this sprocket looks has half the teeth of the original sprocket, will it still work?

    This will work for the 2024 if it has a chain drive rail.

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