LiftMaster K32-34655-1 Top Gearbox — CSW24 Swing-Gate Operator Service Part

The LiftMaster K32-34655-1 is the top gearbox identified in documented CSW24VDC and CSW24UL swing-gate operator repair drawings. It is a mechanical drive service component, separate from the lower gear reducer, motor and output-shaft kit. Choose it by the complete operator model and this exact part number, including the -1 suffix. A gearbox located in the same position on another LiftMaster operator is not automatically interchangeable. Confirm the fault and the condition of the surrounding drive before ordering.

Compatibility — Models, Versions and Exclusions

Confirm the Upper Gearbox Is the Component That Needs Repair

The CSW24 drive contains several mechanical connections and a separate lower reducer. Noise, looseness or failure to move the gate can involve the shaft, chain, sprockets or arm connection as well as the gearbox. Have the technician inspect the complete drive and the gate’s mechanical condition before selecting replacement parts.

Photograph the existing assembly and record the operator model before disassembly. Compare the installed gearbox with the exact service drawing, especially on equipment that has been repaired previously. The output shaft and limit-drive kit have their own service reference, so determine whether those parts can be retained or also need replacement. A new top gearbox should not be used to compensate for worn connections or a gate that binds on its hinges.

Specifications and Product Identification

Before Ordering

• Read the complete operator model and verify K32-34655-1 in its parts diagram.
• Confirm the required repair is the upper gearbox rather than the lower reducer.
• Inspect the shaft, chain, sprockets, mounting points and arm connection.
• Check the current gearbox carton and identify any separately required service parts.

Package Contents and Separate Requirements

This listing identifies the top gearbox. A motor, lower reducer, output-shaft kit, limit chain, encoder or complete arm assembly is not promised as included. Confirm the current supplied contents before purchase. The operator’s exploded drawing identifies several neighboring items separately; their proximity to the gearbox in the illustration does not make them part of the same shipment.

Safety Warnings — Read Before Installation or Service

• WARNING: Gearbox service can disconnect the gate from its drive and permit unexpected movement. Have a qualified gate-systems technician secure the gate before removing components.
• Isolate all applicable utility, solar and battery power before opening the drive or touching wiring.
• Do not increase operator force to compensate for damaged hardware or incorrect assembly. Correct the underlying mechanical problem.
• Follow the manufacturer’s reassembly requirements, restore covers and verify travel, reversal and every required protection device before normal use.

Related Products and Important Differences

• LMRRUL monitored photo eye — a separate non-contact protection option for approved operator configurations; verify its operation after the drive repair.
• LMWEKITU monitored wireless edge kit — a separate connection system for compatible monitored edges; it does not replace the gearbox or the required travel setup.

Frequently Asked Questions

Is this the upper or lower gearbox?

The manufacturer diagrams identify K32-34655-1 as the top gearbox. The lower reducer is a separate service item.

Will it replace the RSW12U top gearbox?

No interchangeability is established. The RSW12U diagram identifies a different reference, K32-34656-1.

Does it include the output shaft and limit chain?

They are not promised with this listing. The referenced CSW24 drawings identify K77-36539 separately for that shaft and limit-drive kit.

Will a new gearbox fix a stiff or sagging gate?

No. Hinges, supports, arm geometry and other mechanical faults need correction. The operator should not force an unsuitable gate through its travel.

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.