LiftMaster K76-36398 1/2 HP 24V DC Gate Operator Replacement Motor

The LiftMaster K76-36398 is a 1/2 HP, 24V DC replacement motor for specified LiftMaster gate operators. Use it when the exact equipment parts diagram identifies this motor and diagnosis confirms that the motor requires replacement. Manufacturer parts documentation identifies this motor in compatible CSL24V, CSL24U and CSW24V configurations. Confirm the production revision and original assembly before purchase; this is a motor service part, and the horsepower or voltage rating alone does not establish fit or include an entire drive assembly.

Compatibility — Models, Versions and Exclusions

Motor Failure Versus a Power or Mechanical Problem

A gate that stops, runs inconsistently or fails to move may have a power, wiring or mechanical fault instead of a defective motor. The motor should be selected after a technician has evaluated the complete drive and confirmed the correct service part. A new motor does not correct a binding gate, worn transmission component or damaged connection.

Record the original motor label and its mounting location before ordering. The operator’s external model label is useful, but an earlier repair may have changed the assembly inside. Ask the technician to identify which adjacent parts are being retained and which require separate replacement. The motor listing should not be treated as a complete gearbox, belt or pulley kit.

Specifications

Compatibility

LiftMaster repair-parts documentation lists K76-36398 in the CSL24V and CSL24U slide-gate operator systems and the CSW24V swing-gate platform. Verify the complete model and production revision before purchase.

The motor’s 24V DC rating describes the motor circuit. It does not mean the operator has a 24V AC mains supply. Follow the equipment wiring diagram and never select a replacement by horsepower alone.

Diagnose the Complete Drive

• Check the power supply, battery condition and motor connections.
• Inspect the gate for mechanical binding or damage.
• Have the gearbox, belt or other connected drive components assessed.
• Confirm the motor reference and mounting arrangement before ordering.

Frequently Asked Questions

Is this a complete gearbox or gate operator?

This SKU identifies the replacement motor. Confirm any separately needed gearbox, pulley, belt or mounting parts from the operator diagram.

Will it fit every 1/2 HP LiftMaster operator?

No. Voltage, motor design, mounting and the specified service part must all match the equipment.

Safety Warnings — Read Before Installation or Service

• WARNING: Electrical energy, moving drive parts and an unsecured gate can cause serious injury. Motor replacement requires a qualified gate-systems technician.
• Isolate every power source, including backup batteries and solar equipment where fitted, and secure the gate before work.
• Never connect this DC motor directly to an AC mains circuit or improvise a supply based on the horsepower rating.
• After installation, verify drive alignment, travel limits and obstruction response. Restore guards and test every required safety device before normal use.

Related Products and Important Differences

• LMRRUL monitored photo eye — a separate protection component to check against the exact operator manual during the post-repair safety inspection.
• LMWEKITU wireless edge kit — a monitored edge communication accessory for approved configurations; it does not replace the motor, gearbox or mechanical repair.

More Questions Before Ordering

Will a higher-horsepower motor improve this operator?

Do not change the motor specification as an improvised upgrade. The controls, transmission, mounting and safety setup must match the approved equipment design.

Does a motor change require safety testing?

Yes. A completed mechanical repair still requires the operator’s prescribed setup and safety checks before the gate returns to service.

Need Help Confirming the Right Part?

Contact Garage-DoorParts.com before ordering. Send the full operator model, readable part labels and photographs of the installed assembly. Include dimensions or the control-box model where relevant. We can help compare the listing with the information you provide; final installation suitability should be confirmed by the servicing technician.