LiftMaster K75-11034 Brake Solenoid Service Kit — 120V Designation

The LiftMaster K75-11034 is the brake-solenoid service reference identified with a 120V designation in the current SKU list. Earlier GH mechanical literature describes the related solenoid plate assembly for 115V models. Match the actual brake label and approved operator service information before ordering, rather than assuming that a nominal voltage description establishes every electrical and mechanical requirement. 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

A brake complaint can involve its electrical actuation, friction parts, linkage or mechanical loading. Have qualified personnel determine whether the solenoid or plate assembly is the required repair. A new solenoid cannot correct an unsafe door, an incorrectly adjusted brake or a worn drive component elsewhere in the mechanism.

Preserve the exact brake circuit and service configuration. Supplier descriptions and historical manuals use different nominal-voltage wording, so the installer must check the current component marking rather than guess connections. Compare the mounting and actuation geometry as well as voltage, then complete the model-specific brake setup and holding/function tests.

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 operator and existing brake-solenoid labels.
• Verify the exact current service application and voltage.
• Inspect the brake linkage and friction components.
• Confirm the supplied kit inventory and required setup tests.

Package Contents and Separate Requirements

This offer identifies the K75-11034 brake-solenoid service item, described as a kit or solenoid plate assembly in service references. Confirm current supplied mounting and linkage pieces. A complete brake, friction disc set, hub, motor and operator are not established as included.

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 it a complete brake?

No complete brake assembly is established. Confirm the current solenoid or plate-service package.

Why do references say both 115V and 120V?

They use different nominal descriptions. Match the actual approved replacement label and exact operator wiring information before installation.

Can it replace a 230V solenoid?

Do not assume so. The separate voltage and complete service reference must match the circuit.

Will it correct a falling door?

Do not operate unsafe equipment. Have the door, counterbalance and complete brake arrangement inspected and repaired by qualified personnel.

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.