Doll: New X Low-Loader for Forestry

Doll Fahrzeugbau GmbH has further developed its low-bed semi-trailer designed for forestry machine transport: In the development, the focus was specifically on the transport of large and heavy forestry machines.

According to the information provided, the redesign features a loading height of 150 millimeters - which is 10 centimeters lower than its predecessor.

For Off-Road Operations

The chassis technology Panther, developed by DOLL, provides the vehicle with a clearance of 315 millimeters, giving it significant ground clearance for rough terrain. The chassis can be adjusted accordingly for uneven surfaces and height differences.

Additionally, the individual wheel suspension features a hydraulic axle compensation. This ensures that the platform remains horizontal in rough terrain.

"Modern XXL harvesters and timber transporters must be transported safely, time-efficiently, and within the legally permitted load height of four meters," says Markus Erdrich, Sales Manager for Heavy Transport at Doll Fahrzeugbau, and adds: "This requires special vehicles that combine robustness, off-road capability, and low load height."

The vehicle is intended to remain maneuverable even in tight spaces as well as off-road with a maximum steering angle of 55 degrees. The frame design has also been optimized.

In the rear area of the loading platform, the new low bed features a tapered and downward-sloping central frame. Here, the crane arm of the forestry vehicles can be placed lower thanks to a 440 millimeter deep crane arm recess.

Assistance Systems

Loading and controlling the Forest Lowbed X is supposed to be even easier in combination with the assistance systems Doll tronic, Doll connect, and Doll control.

Doll tronic is meant to allow the driver to operate all central trailer functions via a keypad on the gooseneck.

In the Doll control variant, instead of a keypad, there is a 7-inch color display on the gooseneck - acting as a digital trailer control center. During loading and transport, a clear display of all vehicle data in symbols and plain text is intended to provide support.

With the Doll connect remote control, the driver can intervene in the steering, control the driving height, or select pre-set driving levels with the push of a button from the driver’s cab without having to get out.

Even if the operator wants to re-align the vehicle after manual re-steering, this can be done with the push of a button on the remote control – the electronic re-alignment (EEP) automatically determines the correct steering angle of the axles.

According to the company, the control systems meet the latest legal requirements for functional safety and cybersecurity. As an additional benefit, Doll cites the robust and weather-resistant (protection class IP 67) housing.