{"product_id":"liftmaster-q123","title":"LiftMaster Q123 \/ K20-9012B-1 Replacement Gate Motor — 12V DC","description":"\u003cp\u003e\u003cstrong\u003eThe LiftMaster Q123 supplier SKU identifies motor K20-9012B-1, a 12V DC replacement used in documented LiftMaster gate-drive arrangements. Manufacturer parts information identifies this motor in the legacy RSW12V \/ RSW12VH platform and in the DC2000CSW backup-drive assembly. Select it by the motor part number and the actual drive configuration, not merely by the gate’s brand or the presence of a 12V battery. This motor is a service component, not a complete battery-backup conversion kit.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eCompatibility — Models, Versions and Exclusions\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel or selection point\u003c\/th\u003e\n\u003cth\u003eCompatibility requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRSW12V \/ RSW12VH\u003c\/td\u003e\n\u003ctd\u003eManufacturer replacement-parts documentation identifies this exact motor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC2000CSW assembly\u003c\/td\u003e\n\u003ctd\u003eThe motor is one component of the documented backup-drive system.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther DC2000 or slide-gate applications\u003c\/td\u003e\n\u003ctd\u003eConfirm the specific parts diagram before ordering; a shared accessory name is insufficient.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24V DC motors\u003c\/td\u003e\n\u003ctd\u003eNot an established substitute; voltage, shaft and mounting requirements must match.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain AC motor on a legacy CSW operator\u003c\/td\u003e\n\u003ctd\u003eDo not confuse the backup-drive motor with the operator’s separate AC motor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eIdentify Which Motor the Repair Requires\u003c\/h2\u003e\u003cp\u003eA legacy installation may have more than one motor function. The primary drive and an optional battery-backup arrangement can use different motors, belts, brackets and controls. A photograph of the operator cover will not resolve that distinction. Record the label on the failed motor and compare its mounting and drive connection with the applicable service drawing.\u003c\/p\u003e\u003cp\u003eA gate that fails during a power outage does not automatically have a failed backup motor. Battery condition, charging, wiring, controller operation and the mechanical drive all need diagnosis. Similarly, a motor should not be replaced to compensate for a gate that binds or a reducer that is difficult to turn. Correct the underlying fault so the replacement is not subjected to the same abnormal load.\u003c\/p\u003e\u003ch2\u003eSpecifications and Product Identification\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplier SKU\u003c\/td\u003e\n\u003ctd\u003eQ123\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer motor reference\u003c\/td\u003e\n\u003ctd\u003eK20-9012B-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical rating\u003c\/td\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct role\u003c\/td\u003e\n\u003ctd\u003eReplacement drive motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented examples\u003c\/td\u003e\n\u003ctd\u003eRSW12V \/ RSW12VH; DC2000CSW backup drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMatch K20-9012B-1 to the installed motor and service diagram.\u003c\/li\u003e\n\u003cli\u003eConfirm 12V DC supply and the correct main-drive or backup-drive role.\u003c\/li\u003e\n\u003cli\u003eInspect the related pulley, belt, coupling or mounting arrangement.\u003c\/li\u003e\n\u003cli\u003eCheck the batteries, wiring and controller before concluding the motor has failed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents and Separate Requirements\u003c\/h2\u003e\u003cp\u003eThe listing identifies the replacement motor. A battery set, DC2000 controller, mounting plate, pulleys, belts and complete wiring harness are not promised as included. Confirm the current carton for any motor-specific hardware. If adding backup operation to an existing gate rather than repairing an installed system, obtain the complete documented conversion requirements instead of purchasing a motor alone.\u003c\/p\u003e\u003ch2 class=\"safety-warning\"\u003eSafety Warnings — Read Before Installation or Service\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWARNING: A moving gate and exposed motor and drive components can cause serious injury. Installation and service require a qualified gate-systems technician.\u003c\/li\u003e\n\u003cli\u003eIsolate AC power, batteries and any solar supply as applicable, and secure the gate against unexpected movement before work begins.\u003c\/li\u003e\n\u003cli\u003eKeep people clear of the gate and drive during supervised testing. Never bypass required entrapment-protection devices or increase force to overcome a mechanical fault.\u003c\/li\u003e\n\u003cli\u003eRestore all covers and guards, then verify travel endpoints, reversal and every required safety device before returning the gate to normal operation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Products and Important Differences\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmrrul-monitored-retro-reflective-photo-eye\"\u003eLMRRUL monitored photo eye\u003c\/a\u003e — a separate protection option only where the exact operator and control revision approve it; not a universal legacy retrofit.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmwekitu-monitored-wireless-edge-kit-for-gate-operators\"\u003eLMWEKITU monitored wireless edge kit\u003c\/a\u003e — a separate edge communication system for approved controls and resistive edges; not a replacement for this mechanical or electrical service part.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs Q123 the manufacturer part number?\u003c\/h3\u003e\u003cp\u003eQ123 is the supplier ordering SKU; the captured supplier record maps it to K20-9012B-1.\u003c\/p\u003e\u003ch3\u003eDoes a 12V battery prove that this motor fits?\u003c\/h3\u003e\u003cp\u003eNo. Battery voltage alone does not establish motor voltage, mounting, control or mechanical compatibility.\u003c\/p\u003e\u003ch3\u003eDoes it replace the AC motor in a CSW backup installation?\u003c\/h3\u003e\u003cp\u003eNot by that description alone. Identify whether the failed component belongs to the AC drive or the separate DC backup drive.\u003c\/p\u003e\u003ch3\u003eWill a motor alone add battery backup?\u003c\/h3\u003e\u003cp\u003eNo. Backup operation requires the correct controller, batteries, wiring and drive components for the documented system.\u003c\/p\u003e\u003ch2\u003eNeed Help Confirming the Right Product?\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/garage-doorparts.com\/pages\/contact\"\u003eContact Garage-DoorParts.com before ordering\u003c\/a\u003e. 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.\u003c\/p\u003e","brand":"LiftMaster","offers":[{"title":"Default Title","offer_id":60655779479838,"sku":"Q123","price":241.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/q123.jpg?v=1793139934","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-q123","provider":"garage-doorparts.com","version":"1.0","type":"link"}