correctly aligned with the holes in the ears 20 and 21 a hydraulic hoist system including a cylinder 24 piston rod 25 and lever arm 26 is mounted on the support 18 on the driving vehicle this hydraulic hoist is also operated from the cab of the driving vehicle at the outer end of the lever arm 26 a length of chain may be affixed to extend downwardly to a suspension point on the plow assembly frame close to the rear face of the blade 10 that length of chain and suspension point are not shown in the drawings in conventional operation the lower scraping edge of the blade 10 may be raised or lowered with respect to ground by operation of the hydraulic hoist to lift and lower the plow assembly at that suspension point a typical sequence of steps in mounting a conventional plow assembly of the kind disclosed on a drive vehicle is generally as follows the rear of the frame 13 is left resting on the ground and the vehicle is driven forwardly until the ears 20 and 21 are approximately over and near the lugs 15 and 16 the rearward end of the frame 13 is then manually lifted to.