(22) Winch operator must stop winch just before payload makes contact with payload chock (20), which should be
positioned on streetside of platform, just forward of second set of curb guide mounting holes.
(23) Chock streetside rear of payload using streetside rear payload chock (19).
Do not disconnect winch cable until platform is level and payload is chocked or
injury to personnel may result.
(24) Release semitrailer parking brakes by pushing inward on knob of brake release valve (21).