LiftMaster K41-0374-000 MAXUM J/H 700 Motor, Gearbox and Encoder — Non-3-Inch Shaft

The LiftMaster K41-0374-000 is the combined motor, gearbox and encoder service assembly identified in MAXUM documentation for the J/H 700 non-3-inch-shaft arrangement. The source describes a 24 VDC motor assembly. Match the exact operator, drive role and shaft configuration before ordering; the manufacturer separately lists K41-0540-000 for the J/H 700 three-inch-shaft arrangement. Select the replacement by the complete part number and the installed equipment configuration. A similar photograph or a shared LiftMaster brand name does not establish interchangeability. Confirm the applicable service drawing before ordering so the repair addresses the correct component and its related mounting, connection and operating requirements.

Compatibility — Models, Versions and Exclusions

Identify the Assembly and Plan the Repair

The complete assembly must match the installed mechanical and feedback configuration. Have qualified personnel diagnose the supply, motor circuit, gearbox and door condition before choosing replacement. Record the operator and existing assembly labels and compare the exact shaft arrangement rather than select from the 700 designation or motor voltage alone.

A combined assembly is different from a bare motor, encoder-only kit or separate drive sprocket. Confirm the current supplied mounting and connection pieces and follow the exact manufacturer replacement procedure. Restore the approved drive alignment and wiring and complete the prescribed commissioning and protection tests. Replacement does not authorize increasing the door capacity or using another duty-class assembly without an approved conversion.

An electrical symptom does not identify the failed component by itself. Have qualified service personnel inspect the supply, wiring, connections and equipment condition before replacing parts. Record existing labels and terminal references with power safely isolated. A replacement should restore the documented circuit arrangement; it should not be used to change operating voltage, defeat a protective function or compensate for a mechanical load that the equipment cannot safely move.

Specifications and Product Identification

Before Ordering

• Record the complete equipment model, serial information and installed service reference.
• Confirm K41-0374-000 in the current service table.
• Manufacturer lists a separate assembly reference.
• Do not transfer jackshaft/hoist assembly fit to trolley equipment.
• Confirm the current supplied inventory and exact installation and final testing instructions.

Package Contents and Separate Requirements

This offer identifies the combined motor, gearbox and encoder service assembly. Confirm the current supplied mounting and connection inventory. A main board, transformer, hoist chain, output sprocket package, rail and complete operator are not established as included. Obtain separate damaged components after checking the exact failure and approved configuration.

Safety Warnings — Read Before Installation or Service

• WARNING: Electrical service can expose hazardous voltage and moving equipment. Use qualified service personnel and electrical personnel where required.
• Disconnect every applicable mains, battery and auxiliary supply before work. Follow the equipment instructions for stored energy and safe isolation.
• Do not bypass grounding, overload protection, monitored safety devices or fire-control functions to make the equipment operate. Diagnose the underlying fault.
• Restore covers and wiring protection, then complete the model-specific functional and safety checks before returning the installation to normal use.

Related Products and Important Differences

• CPS-U monitored photo eyes — separate protection devices for approved commercial-door controls; match the operator and environment.
• TDC12X1BMC MAXUM trolley operator — a complete-operator comparison, not evidence that this legacy service part fits MAXUM.

Frequently Asked Questions

Is this only a bare motor?

No. The manufacturer identifies the motor, gearbox and encoder together.

Will it fit the three-inch-shaft version?

The manufacturer lists K41-0540-000 for that arrangement; confirm the exact current recommendation.

Is it the trolley 700 assembly?

No general trolley fit is established. T 700 has a separate assembly reference.

Does it upgrade operator capacity?

No new capacity or duty-class conversion is established. Restore the approved complete configuration.

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.