LiftMaster K80-50142 Lock and Key Replacement Kit for Commercial Gate Operators
The LiftMaster K80-50142 is a lock and key replacement kit used on select LiftMaster commercial gate operator cabinets and access doors. It restores keyed access to the operator enclosure when the original lock is damaged, the keys are missing, or the cabinet lock has worn from use. Proper cabinet access is important for service work, but the enclosure should also remain secured to protect internal controls and wiring from tampering or weather exposure.
This kit is commonly referenced as Q084 and is broadly described for various LiftMaster commercial gate operators. Some listings specifically associate it with RSW12V swing gate operators and HCTDCU overhead gate systems, but the lock style must match the operator cabinet. This is a cabinet/access lock kit, not an electrical control component and not a gate locking device for securing the moving gate leaf.
What This Part Does
The K80-50142 supports the operator system by servicing the lock and key replacement kit area of the equipment. In the field, this type of replacement part is normally considered when the original component is worn, damaged, missing, electrically failed, mechanically loose, or no longer matching the required operator function. Because these parts are used on commercial and perimeter access systems, the exact fit can depend on model family, horsepower, voltage, control generation, enclosure style, and the original parts diagram.
Compatible With
The K80-50142 is commonly associated with Various LiftMaster commercial gate operators including RSW12V and HCTDCU where Q084 or K80-50142 cam lock/key hardware is specified. Compatibility should be confirmed by model number, original part number, component layout, and the manufacturer parts diagram, especially where several similar LiftMaster parts exist for nearby models.
Common Compatible Products and Applications
- Various LiftMaster commercial gate operator cabinets where K80-50142 is listed
- LiftMaster RSW12V swing gate operator cabinet applications where Q084 is specified
- LiftMaster HCTDCU overhead gate system cabinet applications where Q084 is specified
- Select LiftMaster access door/cabinet lock applications using the matching cam lock and key set
- Operator enclosures where the parts diagram calls for Q084 or K80-50142
Compatibility Notes
- Use with select applications only; do not treat this as a universal LiftMaster replacement part.
- Match the operator model, horsepower or voltage where applicable, and the original part number before ordering.
- Similar-looking LiftMaster parts may use different connectors, shafts, mounting holes, cabinet locks, switch layouts, or electrical ratings.
- For commercial door and gate operators, confirm safety devices and operator operation after repair before returning the system to service.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Lock and key replacement kit |
| Part Number | K80-50142 |
| Application | Cabinet/access door lock replacement for select gate operators |
| Compatible Operator Type | Select LiftMaster commercial gate operators and access enclosures |
| Related Number | Q084 |
| Included Components | Cam lock and keys as supplied by the kit |
| Notes | Match lock style and cabinet application before ordering |
Also Known As / Related Part Numbers
This part may be searched by several LiftMaster, distributor, or component-reference numbers. Related numbers are included to help with identification, but they should not be treated as guaranteed replacements unless the operator parts diagram confirms the match.
- K80-50142
- LM-K80-50142
- Q084
- Q084_A
- LiftMaster lock and keys
- LiftMaster cam lock and keys
- Gate operator cabinet lock kit
- Commercial gate operator key set
Technician Note
Before replacing the K80-50142, compare the original part label, mounting style, wiring or shaft layout, operator model, and parts breakdown. Commercial LiftMaster parts often share similar names but differ by horsepower, voltage, phase, logic generation, operator family, or cabinet design. If the failure involved binding hardware, damaged wiring, water intrusion, overheated components, or repeated faults, correct the cause before installing the replacement part.
Before Ordering, Confirm
- Original part number or related number on the failed component
- Exact LiftMaster operator model and product family
- Voltage, phase, horsepower, or logic generation when applicable
- Mounting style, connector layout, shaft size, switch layout, or cabinet lock style
- Parts diagram match for the specific operator version
- That the door or gate moves freely and the operator is not being overloaded
Professional Advisory
Commercial gate and door operator repairs should be performed with power disconnected and with the moving door or gate secured as required. Electrical components, brake circuits, control boards, and high-voltage motor circuits should be serviced by a qualified gate or door technician. Do not bypass monitored entrapment protection, limit switches, interlocks, or safety devices to force operation after a part replacement.
Important Ordering Warnings
- Do not order by appearance alone.
- Do not assume related part numbers are interchangeable without checking the parts diagram.
- Voltage, phase, horsepower, and logic generation must match where applicable.
- Limit, brake, control, and safety-related parts must be tested after installation.
Questions & Answers
What is the K80-50142 used for?
It replaces the cabinet or access-door lock and keys on compatible LiftMaster commercial gate operator enclosures.
Is Q084 related to K80-50142?
Yes. Q084 is commonly used as a related number for the LiftMaster K80-50142 lock and key kit.
Does this lock secure the gate leaf?
No. This is an enclosure or access-door lock kit, not a gate leaf locking device.
Which operators commonly use this kit?
It is broadly listed for various LiftMaster commercial gate operators and is also associated with RSW12V and HCTDCU applications where the cabinet lock matches.
What should be checked before ordering?
Check the existing lock style, cabinet/access-door cutout, key reference, and operator parts diagram before ordering.
