LiftMaster K20-1075B-2LP-H24 Motor — 3/4 HP, Single Phase, Logic 5

The LiftMaster K20-1075B-2LP-H24 is the 3/4-horsepower, single-phase motor service reference identified for applicable Logic 5 commercial-door operator configurations. Preserve the entire part number, including the H24 suffix, when comparing the installed motor with the service guide. Horsepower and phase are only part of the selection: mounting, shaft connection, supply and lead arrangement must also match. This is a replacement motor for a documented configuration, not an operator-capacity upgrade or a universal substitute for other 3/4 HP motors.

Compatibility — Models, Versions and Exclusions

Match the Mounting and Motor Wiring Before Ordering

Record the complete operator and motor nameplates before ordering, then compare the mounting points, shaft connection and wiring with the service drawing. The H24 suffix is part of the selection rather than an optional catalog detail. A previously modified operator needs assessment against its actual configuration; do not infer the required motor from a housing label alone.

Have qualified personnel inspect the supply, motor-control circuit, capacitor where fitted and mechanical load before replacing the motor. A drive that binds or a brake that does not release can resemble a motor fault. The replacement should restore the specified arrangement. Changing pulleys, bypassing protection or guessing a voltage connection is not an acceptable way to make an unsuitable motor operate.

Specifications and Product Identification

Before Ordering

• Record full operator and motor labels, including the H24 suffix.
• Verify the 3/4 HP single-phase Logic 5 service reference.
• Confirm mounting, shaft and actual electrical connections.
• Inspect the drive, control circuit and cause of motor failure.

Package Contents and Separate Requirements

This listing identifies the replacement motor. A pulley, belt, capacitor, brake, gearbox, wiring harness or complete operator is not promised as included. Confirm the current supplier package against the repair requirements. A parts illustration may show the motor beside these components without including them in the motor carton. Retain only hardware that the service instructions permit to be reused and that the technician finds serviceable.

Safety Warnings — Read Before Installation or Service

• WARNING: Motor replacement exposes hazardous voltage and moving machinery. Use qualified operator-service and electrical personnel.
• Disconnect all applicable power and secure the door or gate before disturbing the drive. Follow the required capacitor and stored-energy precautions.
• Do not connect unidentified leads, infer wiring from color alone or substitute an unapproved mounting or voltage configuration.
• Restore guards and verify motor direction, travel, reversal and all required protection functions before normal use.

Related Products and Important Differences

• CPS-U monitored commercial photo eyes — a separate protection component for approved operators and environments; not supplied with this mechanical accessory.
• TDC12X1BMC MAXUM trolley operator — a complete-operator comparison; verify accessory selection against its own documentation.

Frequently Asked Questions

Is this a three-phase motor?

No. The catalog identifies single phase.

Can any 3/4 HP motor replace it?

No. Match the full reference, mounting, shaft and electrical arrangement.

Can I infer wiring from the part number?

No. Follow the supplied motor label and exact wiring diagram.

Will this increase the operator’s approved capacity?

No. It is a replacement component, not a capacity-conversion kit.

Need Help Confirming the Right Product?

Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.