Genuine LiftMaster K41-0378-000 complete motor, gear box and encoder assembly for the Maxum industrial DC operators.
Fitment: LiftMaster Maxum TDC12S.
The 1200 lb standard duty trolley drive assembly.
Ordering the right part depends on the full model number, which is printed on the operator label. Call GateHouse Supplies if you are not sure — we service these units every day.