SD5011 & All SD Series Slide Door Parts

LiftMaster SD5011 Replacement Parts — SD Series Industrial-Duty Slide Door Operator

Genuine LiftMaster replacement parts for the SD series industrial-duty slide door operator. The SD5011 is the most common version — 1/2 HP, 115V, single phase. Use the exploded diagram to identify your part by its key number, then match it to the tables below.

The SD is belt-driven. Its clutch group runs a 7" pulley and a V-belt, and the clutch spring changes with horsepower — K18-10164 for 1/3 and 1/2 HP, K18-10168 for 3/4 and 1 HP. If your slide door operator is gear-reduced with a torque limiter instead, you have a GSD and want that page, not this one.

Single-slide and bi-parting doors take different hardware and different trolley slider kits, so check which configuration you have before ordering those. Your model number is on the operator’s data label: the first two digits are horsepower and the last two are voltage and phase, so SD5011 is 1/2 HP at 115V single phase.

Models Covered

1/2 HP — most common: SD5011 (115V, 1PH), SD5021 (230V, 1PH), SD5023 (208/230V, 3PH), SD5043 (460V, 3PH), SD5053 (575V, 3PH), SD5025 (230V, 50Hz)

1/3 HP: SD3311, SD3321, SD3323, SD3343, SD3353

3/4 HP: SD7511, SD7521, SD7523, SD7543, SD7553

1 HP: SD1011, SD1021, SD1023, SD1043, SD1053

Logic 5.0 units: SD501L5, SD503L5, SD505L5, SD751L5, SD753L5, SD755L5, SD101L5, SD103L5, SD105L5

Replacement Parts

Service Kits

The motor’s part number is printed on the motor’s own data label. If you can reach it, read the number straight off the label and match it in the motor tables below — that is the most reliable way to order the right motor.

Motor Replacement Kits

Find your model number on the data label, then pick the column that matches your motor. TEFC motors are the NEMA 4/12 enclosure versions.

Motor Replacement Kits — Logic 5.0

Electrical box parts. The SD uses the same control boxes as the T, GT, APT, GSD and GH. Use the section that matches your unit’s control generation.

Electrical Box — Logic Control 4.0

Electrical Box — Logic Control 5.0

Electrical Box — Contactor Style