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AL-KO Lockable Coupling 50mm 2000Kg Mechanical Override Body Only


Handbrake Plate AL-KO

Brake Cable Adjuster

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SKU: 614054LPL


2000Kg Mechanical Override Coupling – 50mm – Plated – Body Only.

Caravan and Trailers are a desirable yet costly investment. Protection has not only become a way of the times, it is a part of your insurance requirements. Alko have incorporated locking technology into the body of the coupling, ensuring you never forget or lose a vital part of your protection leaving you vulnerable.

The Trailer Shop is proud to introduce Alko’s innovative new range of premium lockable couplings – designed to ensure your valuable investment is secure, and eliminating the need for a separate coupling lock. The addition of the new Alko XL Grip also enhances comfort and ease of use.

  • Lock is integrated into the coupling body
  • XL Grip for optimal ergonomics + ease of use compared to classic design
  • AL-KO standard mounting options for a straight switch over.
  • Each coupling comes with 2 keys.

An Alko mechanical Override Coupling is the ideal solution for trailers with a laden mass up to 2000Kg. At the time of writing, braking systems that use an override principal meet legal requirements, as long as they provide adequate braking for the trailer and tow vehicle combination.

This coupling suits a standard 50mm tow ball and is plated for maximum corrosion resistance.

The principal of this type of coupling is a sliding shaft attached to the tow ball housing of the coupling. As the tow vehicle slows down the force of deceleration is passed through the coupling shaft and pushed either on a mechanical linkage (for mechanical brakes) or on a linkage connected to a hydraulic cylinder providing hydraulic pressure to a braking system (hydraulic brakes).

This type of coupling is most efficient if the ball load is not excessive and when load levelling devices are not used, as these devices impede the smooth operation of the coupling, ultimately impeding the braking performance.

When reversing, the attached collar would be fitted to prevent inadvertent brake application. The collar should be removed from the shaft during normal towing use.

For hydraulic brake applications, this coupling would be fitted with the Alko Hydraulic brake conversion kit (Alko Part Number 610941).

For mechanical brake applications, this coupling would be fitted with the Alko Mechanical Override Brake Plate (Alko Part Number 614051).

This coupling is suitable for 50mm tow balls only.

Capacity: 2000Kg
Mounting Pattern (hole centres): 4 bolt 184mm x 54mm
Bolt Hole Size: 13.5mm
Coupling bolt: 1/2″ UNC grade 8

Additional information

Weight 8.2 kg
Dimensions 45 × 22 × 16 cm



  • Ball Size: 50mm
  • Park brake lever fitted: No
  • Finish: Zinc Plated
  • Style: Override
  • Number of Mounting Holes: 4
  • Mounting Hole Dia.: 13.5mm
  • Mounting Hole Spacing: 184mm (centerline of front holes to centre of rear hole) – 54mm (hole center to hole centre side to side)
  • Rating: 2000kg


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