for fork board 66 remains at a fixed position relative to lifting fork board 66 the oil coupling is realized in the shown embodiment by making use of deep drilling techniques fork board 66 replaces in the shown embodiment the conventional fork board in the case of an existing fork lift truck 2 in a further alternative embodiment lifting fork board 76 fig6 and 7 is embodied so as to be arranged without integrated guides into mast construction 12 of fork lift truck 2 chain block 68 provides for the connection to mast chain 70 in this embodiment of fork board 76 mast profiles in mast construction 12 function as guides for the movement of fork board 76 guide wheels 72 are arranged for this purpose on side edges 78 of fork board 76 oil couplings 74 are provided fixedly on frame 78 of fork board 76 in yet another alternative embodiment lifting fork board 80 fig8 is provided with frame 82 with two girders 84 and two side edges 86 the inner area is provided with a plastic plate 88 arranged with connections 90 on frame 82 provided on side edges 86 are uprights 92 in which recess 94 is arranged such that cylinder 96 is arranged therein frame 82 is connected to uprights 92 with form closure 98 and or weld 100 the oil circuit from and to cylinders 96 comprises distributor block 102 mounted on connecting beam 104 a number of oil lines.