LiftMaster 041B3869-3A Belt Drive Trolley Kit Discontinued Buttons: 2

Buttons: 2

for Extension Spring Doors

providing reliable performance for large trapezoid curtain slats

ISO Viscosity Grade of Base Oil: 15

Roller options: Your choice between Nylon or Steel 2" wheels with ball bearings 4" Stem

LiftMaster 041B3869-3A Belt Drive Trolley Kit Discontinued Buttons: 2The LiftMaster 041B3869 3A Belt Drive Trolley Kit is a genuine replacement trolley assembly designed for use with select LiftMaster and Chamberlain belt drive garage door openers. The trolley connects the opener carriage to the garage door arm, allowing the motor to open and close the door smoothly along the rail. This replacement kit is used when the original trolley becomes worn, damaged, or fails to properly engage the belt drive system. Installing