LiftMaster 65520818STK Dual-Trolley Modification Package – 1/2 HP T Operator, 18-Foot Application

Convert a compatible LiftMaster 1/2 HP T-series commercial trolley operator to an approved 18-foot dual-trolley arrangement with package 65520818STK. Dual trolleys provide two door-connection points to help distribute operating force across qualifying large sectional doors.

Product details:

• Manufacturer: LiftMaster

• SKU: 65520818STK

• Application length: 18 feet

• Operator type: Compatible T-series trolley operator

• Operator rating: 1/2 HP

• Configuration: Dual-trolley modification

• Commercial application

This is a modification package, not a complete commercial operator. The operator, extended rails, appropriate #48 drive chain, cross shaft, structural supports, door arms, fasteners, and other job-specific components may be required separately.

Cross-reference 65520818STK with LiftMaster dual-trolley modification 65-5208 and the documentation for the exact operator. Verify that the selected operator has sufficient capacity for the door’s size, weight, construction, track arrangement, duty cycle, and operating conditions.

Because this is an extended 18-foot configuration, accurate rail positioning, support spacing, chain tension, cross-shaft alignment, and door-arm geometry are especially important. Installation should be handled by a qualified commercial-door technician. Secure and balance the door and lock out operator power before beginning work.

Order this package only for an approved 18-foot dual-trolley installation using a compatible 1/2 HP LiftMaster T operator.