LiftMaster Q210 / K75-50224 #70 Top Gearbox Assembly

The LiftMaster Q210 is the #70 gearbox assembly identified by the supplier as manufacturer part K75-50224. The CSW200U repair-parts drawing lists this reference as the top gearbox assembly, separate from the lower gear reducer and output shaft. Choose it for a repair whose exact operator documentation calls for this complete part number. The #70 designation is an assembly identifier, not a stated 70:1 reduction ratio. Confirm the operator generation, mounting and required kit contents before ordering.

Compatibility — Models, Versions and Exclusions

Confirm Which Gearbox and Associated Parts Need Repair

A gate drive can contain more than one gear-reduction assembly. Identify the failed stage before ordering a top gearbox. Noise, excess movement or failure to transmit motion may also involve a shaft connection, chain, belt or arm hardware. A technician should inspect the complete drive rather than assuming all motion problems originate inside this assembly.

Document the operator model and the existing gearbox arrangement before disassembly. Older equipment may have undergone prior repairs, so compare the installed part with the correct service drawing. Check the output-shaft and mounting condition at the same time. A new gearbox should not be fitted to worn connections or used to force a gate that does not move correctly on its own supports.

Specifications and Product Identification

Before Ordering

• Record the exact operator model and verify K75-50224 in its parts diagram.
• Confirm the required component is the top #70 gearbox, not the lower reducer.
• Inspect the output shaft, mounting points and associated drive connections.
• Check the current kit contents and identify any separate parts required for the repair.

Package Contents and Separate Requirements

This listing identifies the Q210 / K75-50224 gearbox assembly. An output shaft, motor, drive belt, external chain, arm assembly or all adjacent parts are not promised as included. Confirm the current carton before ordering. The manufacturer repair diagram lists the gearbox and output shaft separately, so the complete illustrated drive should not be treated as one shipment.

Safety Warnings — Read Before Installation or Service

• WARNING: Gearbox removal can disconnect the gate from its drive and allow unexpected movement. Use a qualified gate-systems technician.
• Isolate all applicable power and secure the gate before removing drive components.
• Do not compensate for binding or damaged hardware by increasing operator force. Correct the mechanical cause before returning the drive to service.
• Follow the specified assembly and maintenance instructions, restore guards and verify travel, reversal and all required protection devices.

Related Products and Important Differences

• LMRRUL monitored photo eye — a separate safety accessory only where approved by the operator’s exact control revision.
• LMWEKITU monitored wireless edge kit — a separate monitored-edge system; it neither replaces the gearbox nor establishes compatibility with older controls.

Frequently Asked Questions

Does #70 mean a 70:1 gear ratio?

No ratio is established by that designation in this listing. Use the manufacturer service reference to identify the correct assembly.

Is the output shaft included?

It is not promised here. The repair drawing lists Q216 / K07-50227 separately; confirm the current gearbox carton.

Is this the same as the CSW24 top gearbox?

No interchangeable fit is established. K32-34655-1 is a different reference and must be selected from its own operator documentation.

Will a new gearbox fix a gate that binds?

No. The gate structure, hinges and drive connections must be inspected and repaired as needed before normal operation.

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.