Liftmaster 41A4837-1 Worm Gear and Retainer
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Liftmaster 41A4837-1 Garage Door Opener Worm Gear and Retainer
• Works on Liftmaster models 3130, 3240, and more.
• Works on Liftmaster models 3130, 3240, and more.
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COMMENT: replacement part for Chamberlin PD420 door opener by John A 6/5/2017
COMMENT: Existing one is worn out. by Thomas B 5/21/2015
