ears one of each of which is shown at 25 and 26 the lowering arm lever in turn pivots along and about a tag pivot shaft 27 which is provided with a bushing 28 the tag axle wheel 30 is mounted on a stub axle or spindle 31 which is carried by an axle mounting lever 32 which in turn is fixed to the lowering arm lever 22 a mount stop 33 is associated with the pivoting lowering actuator mount 34 which carries the ears as at 26 to aid in transmitting force from the pivot lowering actuator 20 to the pivot lowering arm 22 the system is further provided with a tag axle suspension lift actuator which may be an air operated spring 40 the upper end of which is fixed in relation to the frame by a stationary mount 41 and which has a lower pivoting lift actuator mount 42 which further carries a pair of ears one of which is 43 and which pivotally mount the lower end of the lift actuator to a lift arm lever 44 including a shaft 45 as was the case with respect to the lowering arm lever two spaced ears straddle the lift arm lever 44 and are pivotally joined with the spaced ears as at 43 of the lift actuator 40 and held as by a shaft or pin member 45 the three dimensional aspect of the axle mounting and lowering system are depicted in the fragmentary view of fig4 which also depicts the tag axle pivot bushing as at 28 with pivot shaft 27 and pivot shaft mounting collars 51 and 52 the bottom of the tailgate hopper is shown at 53 and the side of the tailgate hopper wheel well at 54 the top of the.