Liftmaster SW22A, SECONDARY ARM TUBE
The LiftMaster SW22A Secondary Arm Tube is a genuine-style replacement part used in the LiftMaster Mega Swing / MSWDCBB commercial swing gate operator family. This tube is part of the secondary arm assembly that links the arm end and gate-side hardware. It is used to maintain the designed arm length and force path between the operator linkage and the gate plate.
Mega Swing operators use a specific arm and enclosure layout, so small pieces such as bolts, washers, plates, arm ends, and windows are not generic hardware. Correct geometry is important because the arm assembly transfers the operator force into the moving gate. If the wrong part is installed, the gate may bind, pull unevenly, damage the arm, or place extra load on the operator gearbox and motor.
This part should be matched by the original part number and the MSWDCBB parts diagram. It is especially important on older or high-cycle gate systems where worn bushings, loose bolts, bent plates, or gate hinge problems may have caused the original component to fail.
Compatible With
These parts are primarily for LiftMaster Mega Swing MSWDCBB / Mega Swing UL commercial-duty swing gate operators and related arm or enclosure assemblies that call out the exact part number.
- LiftMaster MSWDCBB Mega Swing UL commercial-duty swing gate operators.
- Mega Swing perimeter access swing gate operator parts diagrams that list the exact SW part number.
- SW-ARMKIT complete arm kit references where the matching subcomponent is included.
- SW021 primary arm and SW022 secondary arm assemblies where the diagram identifies the related subpart.
- Older Mega Swing / MSWDCBB service documentation using SW-prefix mechanical part numbers.
- SW022 secondary arm assemblies described as including extension tube, arm ends, gate plate hardware, set screws, and nylon washers.
Features and Specifications
| Manufacturer | LiftMaster |
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| Product Type | Secondary arm tube |
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| Part Number | SW22A |
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| Application | LiftMaster Mega Swing / MSWDCBB service part |
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| Compatible Operator Type | Commercial-duty swing gate operator |
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| Associated Assemblies | SW-ARMKIT, SW021 primary arm, SW022 secondary arm, or MSWDCBB enclosure as applicable |
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| Notes | Verify exact part number and parts diagram before ordering |
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| Function | Secondary arm tube / extension tube |
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| Related Assembly | SW022 secondary arm and SW-ARMKIT |
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| Installation Location | Secondary arm between arm end and gate plate area |
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Also Known As / Related Part Numbers
- SW22A
- LM-SW22A
- Secondary arm tube
- SW022 secondary arm component
- SW-ARMKIT secondary arm tube
Technician Note
If the original secondary arm tube is bent or distorted, check gate hinge alignment and stopping points. A tube usually bends from excessive force, impact, or an arm geometry problem rather than normal wear alone.
Before Ordering
- Confirm the installed operator is a LiftMaster Mega Swing / MSWDCBB style unit.
- Match the exact SW part number from the parts diagram.
- Inspect the arm assembly and gate hinges for binding before replacing hardware.
- Do not substitute ordinary hardware for load-bearing arm parts unless the manufacturer documentation allows it.
- Make sure all required gate safety devices remain installed and working after service.
Important Ordering Warning
Several Mega Swing SW-prefix parts are similar in name but not interchangeable. Match the exact part number, location, and assembly before ordering.
Professional Advisory
Gate operator mechanical and electrical parts should be serviced with the operator powered down and secured against unexpected movement. If the gate is binding, moving unevenly, missing required safety devices, or showing electrical damage, have the system inspected by a qualified gate technician before replacing parts.
Product Questions and Answers
What is the LiftMaster SW22A used for?
The LiftMaster SW22A is used as the secondary arm tube in the Mega Swing gate arm assembly on compatible LiftMaster Mega Swing / MSWDCBB swing gate operator assemblies.
Which operator is SW22A most commonly associated with?
It is most commonly associated with the LiftMaster MSWDCBB Mega Swing UL commercial-duty swing gate operator and related Mega Swing arm or enclosure parts diagrams.
Can SW22A be used as a universal swing gate part?
No. This is an OEM-style LiftMaster service part and should only be used where the operator parts diagram calls out the exact part number or assembly.
How should fitment be verified for SW22A?
Verify the operator model, compare the installed component, and check the Mega Swing parts diagram before ordering. Similar SW-prefix parts can look related but serve different functions.
What else should be inspected when replacing SW22A?
Inspect the surrounding arm, brackets, pivot hardware, bushings, fasteners, enclosure, and gate movement. A worn linkage or misaligned gate can damage a new part quickly.
