plate 120 is fixed across a forward region of the bottom of the channel member 116 a vertically oriented l shaped mounting plate 122 joins a complimentary shaped forward end arrangement of the channel member 116 and plates 118 and 120 a left upright cylindrical mounting yoke stem receptacle not visible is provided in a front end region of the reaction arm 96 l when the axle section 28 is adjusted outwardly with the left wheel 16 to establish a wide track position as shown in fig2 the long leg of the l shaped mounting plate 122 is clamped in sandwiching relationship to a left spacer plate 106 by a left pair of bolts 108 while the short leg is clamped as by a left pair of vertically spaced bolts 110 to an upright plate 124 forming part of a u shaped mounting bracket 126 having vertically spaced legs supported by the left spindle receptacle 34 in the case where the axle section 28 is placed in an inward position along with the wheel 16 to establish a narrow track position of the left wheel 16 the long leg of the l shaped mounting plate is clamped to the mounting plate 90 of the support bracket 74 l in sandwiching relationship to the left spacer plate 106 by the left pair of bolts 108 the right and left hydraulic steering cylinders 98 each include a rod 128 projecting axially through a barrel 130 in which is located a piston not shown which is fixed to the rod for reciprocation within the barrel a forward end of the cylinder rod 128 is connected to the right steering arm 48 by a coupler 132 which includes a stem that projects.