LiftMaster 50-19503 Push-to-Open Bracket Kit for LA400 and LA412
The LiftMaster 50-19503 is a push-to-open bracket kit for LA400 and LA412 linear swing gate operators. Standard swing gate arm installations are often pull-to-open, where the gate opens inward toward the property. Some driveways, slopes, setbacks, or property layouts require the gate to open outward instead. This kit provides the bracket geometry needed for push-to-open mounting so the arm can move the gate away from the property. The kit is commonly described as including two post brackets and one arm bracket, and many listings note one kit is used per arm. Because the mounting geometry directly affects stroke, gate travel, and force behavior, the operator installation instructions must be followed. Do not use this bracket to improvise mounting on a non-compatible arm operator.
Compatible With
- LiftMaster LA400 residential linear swing gate operators
- LiftMaster LA412 solar linear swing gate operators
- LA400-S or LA412-S single gate applications when a push-to-open layout is required and the installation manual supports it
- Dual LA400 or LA412 systems when one bracket kit is used per arm as required
- Not intended for LA500, LA500UL, CSW, RSW, SCS, or non-LiftMaster linear arm operators unless the manufacturer specifically lists this kit
Features and Specifications
| Manufacturer | LiftMaster |
|---|
| Product Type | Push-to-open bracket kit |
|---|
| Part Number | 50-19503 |
|---|
| Application | Outward-swinging gate installation |
|---|
| Compatible Operator Type | LiftMaster LA400 and LA412 swing gate operators |
|---|
| Included Components | Common listings describe two post brackets and one arm bracket |
|---|
| Notes | One kit is commonly used per arm; follow operator installation manual |
|---|
Also Known As / Related Part Numbers
- 50-19503
- LM-50-19503
- LiftMaster 5019503
- Push-to-open bracket
- Push to open bracket
- LA400 push open bracket
- LA412 push open bracket
Technician Note
This part should be matched by the operator model, original part number, and replacement parts diagram. Similar LiftMaster parts can look close but differ by switch rating, actuator style, chain length, bracket geometry, mounting pattern, or operator generation.
Before Ordering
- Confirm the manufacturer part number on the old part or parts diagram.
- Match the operator model and production series, not just the product family name.
- Compare physical mounting points, terminals, actuator style, chain length, or bracket layout where applicable.
- Check nearby worn parts that may have caused the original failure.
- For electrical switch replacement or unsafe gate movement, use a qualified gate or commercial door technician.
Professional Advisory
Gate and commercial door operators are heavy moving systems. Do not bypass monitored safety devices, limit controls, stop circuits, or required entrapment protection to keep an operator running. If the operator has high-voltage wiring issues, damaged controls, missing safety devices, or unpredictable movement, have the system inspected before returning it to service.
Product Questions and Answers
What does the 50-19503 bracket kit do?
It allows compatible LA400 and LA412 swing gate operators to be installed in a push-to-open layout where the gate opens away from the property.
Which operators is this bracket made for?
It is listed for LiftMaster LA400 and LA412 gate operators.
Do I need one kit or two for a dual gate?
Listings commonly describe this as one kit per arm, so a dual-arm system may require two kits depending on the installation.
Can this be used on an LA500 operator?
This kit is not listed as an LA500 bracket. Use the bracket hardware specified for the exact operator model.
Why is bracket geometry important?
Incorrect geometry can cause binding, poor travel, excessive force, or unsafe gate movement.
