The LiftMaster K19-10929-25 is an OEM replacement hand chain designed for manual operation of LiftMaster commercial door operators. Used with hoist-style and jackshaft operators, this chain allows you to open or close rolling steel and high-lift sectional doors when electrical power is unavailable or during service. It is supplied in a 25 ft continuous length and built to a 353 pitch specification for proper engagement with compatible pocket wheels and sprockets. This configuration ships without a master link, so the connecting link must be sourced separately to complete installation.
Use this chain on LiftMaster commercial operators that specifically call for a 353-pitch hand chain in their parts lists or service manuals. For proper setup, measure the required chain drop, trim as needed, and install per LiftMaster instructions, ensuring the pocket wheel/sprocket matches the 353 pitch. Always secure the door and follow lockout/tagout procedures before servicing. After installation, verify smooth manual travel and adjust chain length or guides if necessary. This genuine LiftMaster component is ideal for maintenance, repair, or upgrade scenarios where a reliable replacement hand chain is required for emergency or routine manual operation.