LiftMaster K71-B3PH Brake Service Kit — Documented 230/460V Three-Phase Applications

The LiftMaster K71-B3PH source offer identifies a brake-related service kit for documented 230/460V three-phase gate-operator applications. Manufacturer SL585U and SL595U diagrams use this reference within the brake-kit listing, while the supplier describes an internal brake-solenoid item. Confirm the current manufacturer replacement and exact package scope before ordering, particularly where newer service information uses K71-B3PH-1. The operator’s supply designation is not an instruction to apply that voltage directly to an individual coil, and a three-phase kit must not be selected as a single-phase substitute.

Compatibility — Models, Versions and Exclusions

Resolve the Kit Revision and Brake-Circuit Requirements

Have the technician record the complete operator nameplate and the installed brake and solenoid markings. Older diagrams and later service corrections can use different kit references, so compare them before ordering. The source product name alone is insufficient to establish whether the shipment provides an individual solenoid or the broader documented brake assembly.

Inspect the brake linkage, friction components and supply circuit together. A coil-related failure may not be the only defect, and a new solenoid does not repair worn mechanical parts. Use the exact wiring diagram and current service procedure; do not infer a coil connection from the 230/460V operator-family label or transfer wiring by color alone.

Specifications and Product Identification

Before Ordering

• Record the complete operator model, supply and phase.
• Photograph the installed brake and solenoid markings.
• Confirm the current replacement forK71-B3PH and its exact package scope.
• Inspect both the mechanical brake and its electrical control before ordering.

Package Contents and Separate Requirements

The manufacturer diagram describes a broader brake kit, while the source calls this an internal brake-solenoid item. Confirm the actual supplied inventory before purchase, including whether brake hardware beyond the solenoid is included. Do not assume a complete brake or a specific set of friction and mounting parts from the short supplier title. Motor, gearbox and complete operator are separate requirements.

Safety Warnings — Read Before Installation or Service

• WARNING: Brake service can allow unexpected gate movement. A qualified gate technician must secure the gate before disturbing the brake or drive.
• Disconnect and secure all applicable electrical power before wiring or mechanical work. Use qualified electrical personnel for supply verification.
• Do not bypass the brake, force it to remain released or apply an unverified voltage to a solenoid.
• After service, verify the required brake behavior, travel, reversal and all protection devices before returning the entrance to traffic.

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 automatically a bare solenoid?

Do not assume so. Manufacturer and supplier descriptions use different scope wording; confirm the current kit inventory.

Does 230/460V mean that voltage goes directly to the coil?

No. Verify the actual brake circuit and component label with the wiring diagram.

Can it replace a single-phase kit?

No interchangeability is established; use the kit for the exact electrical configuration.

IsK71-B3PH-1 the same shipment as this source SKU?

Confirm the current manufacturer replacement and carton contents before ordering; related references do not prove identical inventory.

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.