leveler retraction fig2 3 are exploded views that show the kingpin rivet prior to the swaging process when the kingpin rivet is swaged the shim 70 and the upper spacer 72 are captured between the lower surface 34 of the upper raceway and a flat upper surface 53 of the lower raceway the thickness of the shim 70 is controlled to provide proper spacing for the bearings the lower raceway 50 has a drawn cylindrical portion 51 circumscribed by an arctuate lip 52 which extends upwards and supports the lower bearings the lip 52 enhances structural rigidity permits the absorption of lateral loads and allows the lower o ring seal 77 to nest between it and the interior 48 of the wheel chassis which is shown in fig4 a cavity 54 internal to the cylindrical portion accommodates the lower spacer 74 and the head 61 of the kingpin rivet 60 the lower spacer rests between a flat inner surface 55 and the seat 62 of the kingpin rivet as shown in fig5 6 the leveling sub assembly 100 is similar to a standard leveler and comprises a stud 120 a foot 130 and a locknut 110 the stud 120 is a machined part with a threaded portion 121 at one end 128 a u201c stop u201d which may be a hex nut portion 124 and a ball end 127 the ball may be either integral to the stud as shown or separately attached as shown in fig1 and 5 the end of the stud 128 opposite the ball end 127.