The Genie 28773A.S Belt Pulley is an OEM replacement component for select Genie belt-drive garage door openers. Designed to guide and redirect the drive belt inside the rail assembly, this pulley helps maintain proper belt alignment and smooth travel of the door carriage, reducing noise and wear during everyday use. It is intended as a like-for-like replacement for the original pulley identified by part number 28773A.S, making it a reliable option to restore performance on compatible Genie belt-driven systems used in residential applications.
Use this replacement pulley when the existing pulley is worn, cracked, or causing belt misalignment. Installation typically involves disconnecting power to the opener, releasing belt tension, swapping the pulley within the rail assembly, re-tensioning the belt according to the opener’s service instructions, and verifying travel limits. For compatibility, match the part number 28773A.S to the model’s parts list or user manual before ordering. As with all garage door opener service, follow Genie’s safety guidance and ensure the door is secured to prevent unintended movement during maintenance.