Dreyoo 4 Pcs Screw Drive Coupler Part Compatible with LiftMaster Chamberlain Garage Door Opener, Garage Door Opener Sprocket Coupler Part 25C20 25A18

Garage Door Makes Noise But Will Not Open First, check the power, switch and opener motor. If they work but the shaft does not turn, then check the coupler. The coupler assembly is designed to keep the screw drive and motor from wear and tear. It can get fatigued over time with the weight of your garage door. Then it's time to replace the screw drive coupler with this replacement. Universal Compatibility Replaces sprocket coupler part number: replacement for 025C0020, 25A20, 25C20, 25A18 Compatible with LiftMaster, Sears and Chamberlian screw drive and low profile screw drive operators (1995-current) Compatible with LiftMaster models 1000SD, 2000SD, 1000SDR, 2000SDR, 2110, 2220 Compatible with Chamberlain models 4600, 4620, 4640, 9902, PD420, PD460-2, 9950 Quick Replace Sprocket Coupling on a Screw Drive Operator Tools are Required: Socket wrench/ratchet set Cross head screwdriver Flat head screwdriver Adjustable wrench 3/8'' socket or 7/16'' socket Steps to Replace: 1. Disconnect power to your garage door opener 2. Take off the nuts and hex screws from the motor unit bracket 3. Detach the rail from the bracket and slide it backwards 4. Carefully remove the broken coupling, and slide the new one over the rail sprocket 5. Aligning the teeth on the new coupler with the grooves 6. Reattach the rail/power unit bracket with the hex bolts 7. Connect power and adjust the travel and force limits Warm Note: The brands related above are only for purposes of demonstrating compatibility, not use as trademarks, our trademark is Dreyoo.