LiftMaster K74-34582-1 Plastic Control Box for LA500CONT Swing Gate Control System

LiftMaster K74-34582-1 Plastic Control Box for LA500CONT Swing Gate Control System

The LiftMaster K74-34582-1 plastic control box is a replacement enclosure for LA500CONT style LiftMaster swing gate control installations. The enclosure protects the control board, battery backup components, transformer area, accessory wiring and internal brackets from rain, UV exposure, insects, dust and physical damage. A damaged box can allow water into the electronics, which is one of the most common causes of intermittent gate operation and board failure.

Because LiftMaster uses several similar control box families, this enclosure must be matched by part number and control box layout. LA500CONT, LA500, LA400, LA412 and UL-generation boxes may not share the same housing, mounting pattern or internal bracket arrangement. If the old box has a different reset switch location, hinge style or bracket layout, confirm the factory parts diagram before ordering.

Features and Specifications

Compatible With

• LiftMaster LA500CONT control box applications
• Select LiftMaster LA500 series swing gate operator control systems
• Select LA400 and LA412 actuator systems using an LA500CONT-style control panel where verified by parts diagram
• Perimeter access swing gate control boxes that specifically list K74-34582-1

Also Known As / Related Part Numbers

• K74-34582-1
• K74345821
• 74-34582-1
• K74-34582
• LA500CONT plastic control box
• LA500 control box housing

Technician Note

This is an enclosure, not an electronics kit. If the old box has water damage, inspect the board, batteries, transformer, wiring harnesses, reset switch and accessory terminals before transferring parts into the new housing.

Before Ordering Checklist

• Match the part number on the original control box or parts diagram.
• Confirm the operator model and suffix, such as LA400, LA400U, LA412, LA500, or LA500U.
• Confirm whether this is an empty plastic enclosure or a complete control panel with electronics.
• Inspect hinges, latch points, mounting holes, wire exits, and internal brackets before ordering.
• Do not reuse damaged wiring, corroded terminals, or unsafe battery connections.

Professional Advisory

This enclosure work involves the operator control compartment. Disconnect power, secure the gate, and use a qualified gate technician if wiring, batteries, safety devices, or line-voltage connections need to be moved.

Product Questions and Answers

Does K74-34582-1 include the control board?

No. It is treated as the plastic control box enclosure unless the supplier specifically states that electronics are included.

What system is this box commonly used with?

It is commonly associated with LA500CONT style LiftMaster swing gate control systems and select LA500 series applications.

Can I use this to replace any LA400 or LA412 box?

Not automatically. Some LA400 and LA412 systems use different enclosure part numbers or control-panel layouts.

Why does the exact control box part number matter?

Mounting holes, internal brackets, reset switch placement, wiring exits and lid hardware can differ between similar-looking boxes.

Should damaged electronics be reused in the new box?

Only after inspection. Water-damaged boards, corroded terminals or unsafe battery wiring should not be reused without proper diagnosis.