LiftMaster K75-39337 Trolley Nut Kit | LA500 & LA500DC Swing Gate Operator Repair Kit

Product Description:

LiftMaster K75-39337 Trolley Nut Service Kit — LA500 Series Swing Gate Operators

Get your LiftMaster LA500 swing gate operator back in action with the genuine OEM K75-39337 Trolley Nut Service Kit — the factory-designed repair solution for one of the most common LA500 failure points.

Why You Need This Kit: The travel nut on LA500DC and LA500DCS gate operators may break when excessive force is applied to the gate, such as being struck by a vehicle. The travel nut is the white plastic nut that attaches to the internal lead screw of the arm. The symptom of this problem is that the trolley assembly slides back and forth along the guide slots without mechanical restraint. When this happens, the gate arm loses all mechanical control — and this kit is the correct fix.

Everything You Need in One Box: The kit includes Pan Head Screws (M5 and M6), Split Washer M6, Nut M6, O-ring, Pin, Retaining Ring, Trolley Plate, Bushing Retainer, Flat Washers M6, Screw M6, Trolley Pin, Base Plate, Arm Gasket, and an Installation Guide. No hunting down individual hardware — everything needed for a complete repair is included.

Genuine OEM Part: The K75-39337 is a direct OEM replacement, crafted to match the precise standards and quality of your original equipment for seamless compatibility. Aftermarket trolley nuts may fit loosely or wear prematurely — this is the part LiftMaster engineered specifically for this repair.

Compatible Models: The K75-39337 is designed for use with LiftMaster Model LA500 Series and various commercial swing gate operators. Compatible with LA500, LA500DC, and LA500DCS actuator arms.

DIY or Pro-Friendly: The kit includes all necessary hardware and straightforward instructions, making it ideal for both DIY enthusiasts and professional installers. No specialized tools required — if you can follow step-by-step instructions, you can complete this repair.

Important Notes:

• The image may not represent the complete kit — all components listed above are included
• Consult your LA500 product manual or replacement parts diagram before ordering to confirm compatibility with your specific model revision
• This is a genuine LiftMaster (Chamberlain Group) OEM part — not an aftermarket substitute

Part Number: K75-39337 Also Known As: LA500 Trolley Service Kit, LA500 Travel Nut Kit, LA500DC Trolley Repair Kit Manufacturer: LiftMaster / Chamberlain Group Condition: New OEM