The Genie 18428D.S is an OEM replacement drive chain engineered for Genie chain drive garage door openers paired with 8 ft (96 in) high sectional garage doors and containing 522 pitches (522P). The additional pitch count (522 vs 474 for the 7 ft variant GE-18428B.S) accounts for the longer rail travel required when opening an 8 ft door. The chain drives the carriage trolley along the opener T-rail, transmitting motor torque to smooth door travel. The chain master link GE-20060A.S is used to join the chain ends during installation or replacement. This chain is not intended for 7 ft, 10 ft, or taller door configurations, or for belt or screw drive opener models.
A: GE-18428D.S has 522 pitches for 8 ft door height installations, while GE-18428B.S has 474 pitches for 7 ft door height models. The correct chain must match the door height to ensure proper tension and travel.
A: GE-20060A.S is the chain master link used to join the chain runs when installing GE-18428D.S.
A: GE-18428D.S is for Genie chain drive openers installed on 8 ft door height garage door applications.
A: GE-18428D.S is also known as 162-18428D and 18428D.
A: Set chain slack to approximately 1/2 in of deflection at the midpoint of the chain span, then secure the tensioning hardware and verify door travel is smooth through the full cycle.
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