LiftMaster K75-16339 Wall Bracket Service Reference — SD / GSD

The LiftMaster K75-16339 identifies the wall-bracket service reference used in documented SD and GSD commercial sliding-door arrangements. Select it by the rail support and opening configuration, not simply by the number of brackets pictured in an installation manual. The quantity required for a complete installation and the quantity supplied under one service reference must be checked separately. 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 bracket supports the documented sliding-door rail arrangement, so correct location, spacing and attachment are essential. Have the installer evaluate the wall structure and the rail’s alignment before replacing a damaged support. A new bracket cannot correct inadequate anchoring, a distorted rail or a wall that cannot carry the intended loads.

Installation documentation can show different total bracket counts for different opening sizes and door arrangements. A full hardware-kit count is not proof of the quantity supplied when ordering K75-16339 as an individual service reference. Confirm the current package, calculate the total needed for the specific layout and account for any supports that are damaged or missing.

Compare the replacement with the installed service arrangement before dismantling the equipment. Photograph the part’s location and record the complete model and visible service numbers. Inspect the surrounding attachment points and mating components for wear, impact damage or misalignment. Replacing one worn item will not correct a damaged support or another component that continues to impose abnormal loads on the repaired assembly.

Specifications and Product Identification

Before Ordering

• Identify the exact SD or GSD installation layout.
• Measure the opening and establish the prescribed bracket locations.
• Confirm wall structure, attachment and rail alignment requirements.
• Separate the total installation count from the current carton quantity.

Package Contents and Separate Requirements

This offer identifies the K75-16339 wall-bracket service item. Confirm the number of brackets and any hardware supplied in its current package. Do not infer a four-bracket carton from a larger operator hardware kit, and do not assume that anchors, rail, door hangers or a complete mounting system are included.

Safety Warnings — Read Before Installation or Service

• WARNING: A moving commercial door and exposed wall bracket service reference — sd / gsd can cause serious injury or death. Have a trained door-systems technician perform installation and service.
• Disconnect mains power and any battery backup before mechanical work or wiring. Secure the door against unexpected movement as directed by its manufacturer.
• Do not work on springs, cables or counterbalance components without appropriate training. Never bypass safety sensors or increase force to overcome binding.
• Restore guards and complete the model-specific travel, reversal and protection-device tests before returning the door to normal operation.

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

How many brackets do I need?

Use the installation layout for the actual opening and single-slide or bi-part configuration. The total is not established by the service number alone.

Does one order contain four brackets?

That is not established here. A larger kit’s packing list does not prove the current individual service-package quantity.

Is this a universal operator wall mount?

No universal mounting application is claimed. Match the SD/GSD rail support drawing and exact arrangement.

Can I reuse damaged wall anchors?

Have the installer assess the wall and attachment system. Replace unsuitable attachment materials according to the approved structural requirements.

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.