An apparatus for providing with two pairs of forks a front part of a forklift truck comprises first profiled elements for supporting a pair of external forks and second profiled elements for supporting a pair of internal forks, a guide device that receives internally both said first profiled elements and said second profiled elements. A water-resistant arrangement is further incorporated into the light-emitting device. The connection is further reinforced by way of welding. Increasing the proportional function gain term at relatively low cabin error rate magnitudes offsets potential backlash effects from the gear train.