axis parallel to that of hinge 33 and is connected to lever 32 by a hinge 39 parallel to hinge 38 with specific reference to fig1 shock absorber 36 is hydropneumatic and comprises a stiffness regulating member 40 having known hydropneumatic accumulators and for adapting the response of shock absorber 36 to the characteristics of the terrain over which tractor 2 is operated with reference to fig1 and 2 it should be noted that elongated body 30 is normally located to the side of and therefore in no way interferes with countershaft 23 the operation of steering assembly 1 is clearly understandable from the foregoing description with no further explanation required it should be noted however that in response to ground induced stress on tractor 2 oscillation of front axle 4 about joint 5 is damped by shock absorber 36 thus providing for smooth operation of tractor 2 over rough ground clearly changes may be made to assembly 1 as described and illustrated herein without however departing from the scope of the present invention for example as shown in fig3 to reduce the stress on shock absorber 36 the locations of joint 34 and hinge 33 are inverted so that lever 32 which in fig1 is hinged centrally to frame 3 is hinged at the end and operates as a known second class lever with reference to fig4 and 5 lever 32 is modified and defined longitudinally by a pair of substantially identical squarely bent portions 45 frame 3 carries a pair of shock absorbers 36 only one.