The Genie 36179R.S Screw Drive Carriage with Magnet is a direct replacement trolley assembly for select Genie screw drive garage door openers that use a magnetic travel limit system. This carriage rides on the screw-drive rail to move the door, while the integrated magnet interfaces with the opener’s sensor to signal accurate open and close limits. It restores smooth, reliable travel when the original carriage is worn, cracked, or slipping, making it an essential repair part for maintaining consistent performance in residential garage door opener applications.
Identified by Genie part number 36179R.S and commonly referred to as a trolley or carriage assembly, this unit is designed for compatible Genie screw-drive rails that require a magnet-equipped carriage. Installation generally involves disconnecting power, releasing the door via the emergency release, removing the old carriage from the rail, sliding the new carriage into position, reconnecting the door arm, and re-engaging the opener; after replacement, verify and adjust travel and force limits per the opener’s owner’s manual. For safety, ensure the door is balanced and supported during service, keep hands clear of moving parts, and test the safety reversal system after setup. Always confirm compatibility with your specific Genie model and rail type—particularly that it uses magnetic travel sensing—by checking the opener manual or existing part number before purchasing this replacement part.