Overrun devices for trailers

    Safe braking with the right overrun device

    An overrun device is the control unit for the overrun brake system. When the towing vehicle decelerates, a force is generated at the coupling point. This causes the draw tube to be pushed in. The force is then transmitted to the trailer wheel brakes via deflection lever and brake actuating rod. This way, the overrun brake helps to safely slow down the combination.

    AL-KO VT overrun devices combine precise brake transmission with a wide selection of designs and weight classes. The housings are hot-dip galvanised. The systems comply with the ECE guidelines specified in the catalogue and must be used with the matching AL-KO wheel brakes.

    The right overrun device for your trailer

    Which overrun device is suitable depends, among other things, on the permissible gross weight, the drawbar design, the installation situation and the required function.

    Square overrun devices

    Square overrun devices are available for trailers with different drawbar profiles. Versions without drawbar profile cover trailer weights from 450 to 3,500 kg. Variants with drawbar profile are also available for areas from 450 to 3,500 kg. Additionally, side-swivelling versions with telescopic handbrake lever and removable models for 950 to 2,600 kg are available.

    Overrun devices square

    Overrun device square with drawbar section

    V-shaped overrun devices

    The V-shaped design is available in various weight classes from 450 to 3,500 kg. Depending on application, you can choose from the BASIC, PLUS and PREMIUM PROFI product lines. These differ, among other things, in the housing, bearings, ease of use and scope of equipment.

    Height-adjustable overrun devices

    Height-adjustable models make it easier to adapt to different vehicle and drawbar heights. The catalogue includes versions for 500 to 1,000 kg, 850 to 1,600 kg, 1,425 to 2,700 kg and 2,500 to 3,500 kg.

    Special versions and accessories

    For special requirements, AL-KO VT offers overrun devices with hydraulic brake transmission as well as versions up to 6,000 kg at 40 km/h. Additionally, towing connections, jockey wheel traverses, brake actuating rods and breakaway cable guides are available.

    Frequently asked questions about overrun devices

    When braking the towing vehicle, the draw tube of the overrun device is pushed in. The force is transmitted to the wheel brakes via deflection lever and transmission device.

    Depending on the design, the catalogue versions span from 450 to 6,000 kg. The appropriate weight class must be matched to the permissible gross weight and other components of the trailer.

    The overrun device and wheel brakes must be compatible. For the operation of the breakaway brake, a suitable cable guide and sufficient clearance for the handbrake lever are required. The specific design and approval of the trailer are the responsibility of the vehicle manufacturer.

    Looking for the right solution for your trailer?

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