12 is provided with a vertical hole which is aligned with a vertical hole 58 extending through the ball 52 with a hitch pin 60 being received in these aligned holes so as to connect the hitch 14 to the tractor and to provide a vertical axis about which the hitch 14 may pivot referring now to fig1 and 5 there is shown structure for effecting raising or lowering of the clevis 28 for accommodating tractor drawbars of different heights by individually inducing a force for lifting or lowering the arm sections 24 and or 26 about the pivot pins 48 and 50 specifically extending horizontally between and welded to the straps making up the connecting portion 30 of the upper hitch arm section 24 is a rod which defines a stop 62 a bell crank 64 in the form of a pair of parallel generally triangular plates has a first corner mounted for pivoting about the pivot pin 34 and includes a front corner with the plates straddling and being welded to a threaded cylindrical tube 66 which receives a cap screw 68 having its lower end engaged with the stop 62 a jam nut 70 is received on the screw 68 for holding the latter in a desired position of adjustment the bell crank 64 has a lower.