COMPONENT OPERATION / Swing Device SWING MOTOR The swing motor consists of swash plate (1), rotor (4), plunger (10), valve plate (5), housing (3) and swing parking brake (springs (6), brake piston (7), plate (8), friction plate (9)). Shaft (12) is splined to rotor (4) into which plunger (10) is inserted. When pressure oil is supplied from the pump, plunger (10) is pushed. Shoe (2) at the top of plunger (10) slides over swash plate (1) so that rotor (4) rotates. The top of shaft (12) is splined to the first stage sun gear of swing reduction gear. Therefore, the rotation of shaft (12) is transmitted to the swing reduction gear.
T178-03-02-002 1 - Swash plate 4 - Rotor 7 - Brake Piston 10 - Plunger 2 - Shoe 5 - Valve Plate 8 - Plate 11 - Retainer 3 - Housing 6 - Spring 9 - Friction Plate 12 - Shaft T3-2-3 6 7 8 9 10 11 12 5 4 3 2 1