LiftMaster K71-B1PH-1 Brake Solenoid Kit — 120/240V, SL585U / SL595U

The LiftMaster K71-B1PH-1 is the brake-solenoid kit identified by the manufacturer for the documented 120/240V SL585U and SL595U applications. LiftMaster’s support information expressly corrects this kit reference and distinguishes it from three-phase and 575V brake-solenoid kits. Select it using the operator’s complete nameplate, electrical configuration and brake arrangement. The motor supply label and the brake circuit must be checked together; a similar-looking solenoid or a shared operator family name is not enough to establish fit.

Compatibility — Models, Versions and Exclusions

Inspect the Brake Mechanism and Electrical Supply Together

A brake that fails to release or hold correctly may have a mechanical fault, an electrical supply problem or both. Have the technician inspect the linkage and friction components as well as the solenoid circuit. Replacing the coil-related assembly alone will not correct worn brake parts or a binding drive.

Use the manufacturer’s corrected part reference rather than relying on an older diagram without checking its service notes. Record the existing solenoid label and operator voltage and phase before ordering. Do not connect a replacement based on wire color alone or treat a kit’s voltage description as permission to select any available terminal arrangement.

Specifications and Product Identification

Before Ordering

• Record the full operator model, supply voltage and phase.
• Identify the existing brake and solenoid labels.
• Check the applicable manufacturer correction and kit instructions.
• Inspect the mechanical brake components and confirm the required package scope.

Package Contents and Separate Requirements

This listing identifies the brake-solenoid kit. Confirm its current inventory for the solenoid and any supporting mounting or connection pieces. A complete brake mechanism, motor, gearbox or operator is not promised as included. LiftMaster also identifies individual solenoids separately, so compare a component-only repair with the kit rather than assuming identical contents.

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 the same as the three-phase brake kit?

No. LiftMaster identifies K71-B3PH-1 separately for the documented three-phase arrangement.

Does the kit include a complete brake?

A complete brake is not promised. Confirm the current service-kit inventory and required mechanical parts.

Can the operator model name alone establish fit?

No. The electrical configuration and actual brake arrangement must also match.

Will a new solenoid repair worn brake surfaces?

No. Mechanical wear requires its own diagnosis and repair.

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.