Abstract: Apparatus (10) is disclosed including an interchangeable brush (88) and either a removable vacuum shoe (38) for soft floor surfaces or removable squeegee and carriage assemblies (56, 68) for hard floor surfaces. A spindle (32) is rotatably mounted in the chassis (18) and includes first and second arms (36, 52). The first arm (36) is attached to a sleeve (34) for removably and pivotally receiving a pivot pin (40) of the vacuum shoe (38). The second arm (52) includes an elongated slot (54) which slideably receives a follower pin (82) of a crank arm (80) of the carriage assembly (68). The spindle (32) is rotated by an integral lever (44) pivotally connected to a linkage (46) having its opposite end pivotally connected to a second, pivotable lever (26).

Abstract: A mobile surface cleaning machine with rear mounted steerable wheels steered by a steering wheel, first and second squeegee blades pivotally mounted on each side, respectively, on the rear of the machine. A cam carried by the rear wheels with first and second levers pivotally mounted on the machine, each of the levers having a roller mounted thereon for contact with the cam. A first flexible cable connected to the first lever and the first squeegee and a second cable connected to the second lever and said second squeegee. A sprocket carried by the cam. A chain carried by said sprocket and the steering wheel whereby actuation of the steering wheel to turn the machine in one direction lowers one of said squeegees to a surface on which the machine is operated and maintains the other squeegee raised from the machine with both squeegees maintained in raised positions when the machine is steered in a forward direction.