J5011 & All J Series Industrial Jackshaft Parts

LiftMaster J5011 Replacement Parts — J Series Industrial-Duty Jackshaft Operator

Genuine LiftMaster replacement parts for the J series industrial-duty jackshaft operator, 2005 to current production. The J5011 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.

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 J5011 is 1/2 HP at 115V single phase and J5023 is 1/2 HP at 208/230V three phase. The J is handed — frame plate kits and frame rails come in left and right versions that do not interchange.

Note on brake parts: the J takes the internal brake solenoids and the single-phase drum brake kit listed under Service Kits. It uses K71-B3PH for three-phase units rather than a three-phase drum brake.

If your J was built before 2005 these parts will not fit. Those are listed separately on our J Prior to 2005 page.

Models Covered

1/2 HP — most common: J5011 (115V, 1PH), J5021 (230V, 1PH), J5023 (208/230V, 3PH), J5043 (460V, 3PH), J5053 (575V, 3PH), J5025 (230V, 50Hz), J5038 (380V, 3PH, 50Hz)

1/3 HP: J3311, J3321, J3323, J3325, J3338, J3343, J3353

3/4 HP: J7511, J7521, J7523, J7525, J7538, J7543, J7553

1 HP: J1011, J1021, J1023, J1043, J1053

Logic 5.0 units: J501L5, J503L5, J505L5, J331L5, J333L5, J751L5, J753L5, J755L5, J101L5, J103L5, J105L5

Replacement Parts

Service Kits

Motor Replacement 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 below — that is the most reliable way to order the right motor. TEFC motors are the NEMA 4/12 enclosure versions.

Motor Replacement Kits — Logic 5.0

Electrical box parts. The J shares its control boxes with the H and HJ, and those boxes use different parts from the T and GT versions. The J was also offered in a NEMA 4/4X enclosure and, on early units, the contactor-style box.

Electrical Box — Logic Control 4.0

Electrical Box — Logic Control 5.0

Electrical Box — NEMA 4 / 4X