fig2 with advantage the screws 3 and 5 which only have been screw in a few turns are screw home at the same time as the last screw 4 is tightened thereby the valve position is fixed before the screws 3 4 and 5 are screw home it is as indicated in fig6 possible to laterally adjust the valve 1 in the direction d 3 fig7 10 schematically illustrate a second embodiment of the valve fastening means 1 that is mirrored with regards to the valve fastening means shown in fig1 6 also the hole pattern for the screw holes 10 12 on the valve is mirrored with regards to the valve shown in fig1 6 however the same reference numbers are used in all figures independently of whether the structures are mirrored or not in fig7 and 8 the valve fastening means 1 and the valve are in the relative positions that correspond to the relative positions in fig3 i e with the screws 3 and 5 in front of the openings 6 a and 8 a from fig7 it is appreciated that no screw hole 11 is available through the slit 7 in this position instead the right part of the screw hole is visible through the groove 6 b thus the valve has to be moved to the left with regards to the valve fastening means i e towards the position that is shown in fig9 and 10 before the screw can be inserted into the last screw hole 11 one advantage with the valve fastening means according to the invention is that it is turnable i e the valve part lb can be attached in any orientation on the tractor with maintained functionality fig1 14 show the second embodiment of the valve fastening.