mounted on a scrapper or other earth moving equipment or equipment to be mounted on a rear end of a tractor the drawbar 22 is mounted on the rear of a tractor its wheels 28 a 28 b being shown in phantom the drawbar is connected at a trailing end 30 of a plate 32 which extends underneath and is connected to the underside of the tractor in fig1 the drawbar 22 includes two ears 32 a 32 b however in the embodiment shown in fig2 through 4 a drawbar 22 includes four ears 34 a 34 b 34 c and 34 d both of these embodiments operate in the same way to connect a yoke pin to the drawbar in fig2 and 3 two interconnected locking cams 36 a 36 b are pivotally mounted between ears 34 b and 34 c about pivot axis 38 passing through pivot pin 40 pivot pin 40 is shown in fig2 and 4 the locking cams are pivoted about pivot axis 38 by a removable cam actuating lever 42 lever 42 has one end 42 a engaged in an opening 44 of drawbar block 70 and secured in place by a rotatable thumb screw 46 as best shown in fig4 the locking cam plates 36 a 36 b are retained at the opposite ends of their arcuate path of rotation by opposed spring biased pins 48 a 48 b which extend into grooves 52 at detents 50 a located at one end of the grooves 52 for locking the cams in a closed or locked position the pins 48 a 48 b extend into grooves 52 at detents 50 b located at the opposite ends of grooves 52 for locking the locking.