LiftMaster K76-34740 RSL12V / RSL12VH Learn-Limit Assembly Kit

The LiftMaster K76-34740 is the learn-limit assembly service kit identified for the documented RSL12V and RSL12VH slide-gate operators. The manufacturer kit description names the learn-limit switch, learn-limit nut, limit-shaft assembly, sprocket and wire harness. Later service lists also describe it as a limit passpoint kit. Match the exact V-generation operator arrangement rather than assume compatibility with later U or UL equipment. 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

Identify the actual limit-system fault before choosing the complete assembly. Switch operation, shaft movement, nut condition and wiring can each affect the travel reference. Inspect the surrounding drive and mounting arrangement so that replacing the kit does not leave a damaged support or another source of incorrect limit actuation unresolved.

Confirm the current kit inventory and exact service revision before dismantling the limit mechanism. Follow the manufacturer’s prescribed assembly, learning and travel procedure for the installed controller rather than copy settings from another model. After repair, verify endpoints, stopping behavior and required entrapment protection. A gate that moves once has not completed the required commissioning checks.

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

• Record the complete RSL12V / RSL12VH and controller revision.
• Locate the K76-34740 learn-limit kit callout.
• Inspect the shaft, nut, switch and wiring condition.
• Confirm current contents and prescribed learning/travel procedure.

Package Contents and Separate Requirements

The researched manufacturer kit description identifies the learn-limit switch, learn-limit nut, limit-shaft assembly, sprocket and wire harness. Confirm current quantities and revision. A main control board, motor, complete external gate chain, receiver and operator are not established as included with this learn-limit assembly kit.

Safety Warnings — Read Before Installation or Service

• WARNING: A moving gate and exposed rsl12v / rsl12vh learn-limit assembly kit can cause serious injury. Installation and service require a qualified gate-systems technician.
• Isolate AC power, batteries and any solar supply as applicable, and secure the gate against unexpected movement before work begins.
• Keep people clear of the gate and drive during supervised testing. Never bypass required entrapment-protection devices or increase force to overcome a mechanical fault.
• Restore all covers and guards, then verify travel endpoints, reversal and every required safety device before returning the gate to normal operation.

Related Products and Important Differences

• LMRRUL monitored photo eye — a separate protection option only where the exact operator and control revision approve it; not a universal legacy retrofit.
• LMWEKITU monitored wireless edge kit — a separate edge communication system for approved controls and resistive edges; not a replacement for this mechanical or electrical service part.

Frequently Asked Questions

Is this only the learn-limit switch?

No. The manufacturer describes an assembly kit with the switch, nut, shaft assembly, sprocket and harness.

Is limit passpoint kit related wording?

Yes. Later manufacturer service information uses that wording for K76-34740.

Will it automatically fit RSL12UL?

No. Match the later operator’s exact service information instead of assuming V-generation compatibility.

Must travel be checked after service?

Yes. Follow the approved learning and adjustment procedure and verify stopping and required protection 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.