Abstract: A lock mechanism includes a locking pawl which is movable to a pedal-lock position for preventing a brake pedal from returning from a brake-engage to a normal brake-release position. The pawl is biased toward a pedal-lock position but is normally held in a pedal-release position through means of an actuator rod that is biased to a pawl-retain position. The rod has a foot-engageable portion so located that an operator can use one foot to simultaneously move the brake pedal to its brake-engage position and move the actuator to a pawl-release position permitting the pawl to move its pedal-lock position.