CONSOLE GP 5087596 - Caterpillar

Illustration 1 g01445258
Piston motor (hydrostatic system)
(1) Valve assembly
(2) Flushing valve
(3) Plate
(4) Ring gear
(5) Outer housing
(6) Planetary gear
(7) Sun gear
(8) Piston shoe
(9) Motor housing
(10) Brake disc assembly
(11) Brake spring
(12) Drive shaft
(13) Piston assembly
(14) Rotor housing The piston motor (hydrostatic system) is of an axial piston type. The piston motor (hydrostatic system) that is standard equipment for the machine is a motor that is single speed. The piston motor (hydrostatic system) consists of three sections. These sections are the motor housing (9), valve assembly (1), and the rotor assembly (14). Rotor (14) is connected to shaft (12) by splines. The brake assembly (10) is engaged by the brake springs (11) when there is no hydraulic oil pressure. When there is hydraulic oil pressure, the oil pressure forces brake springs against the face of valve assembly (1). This allows brake assembly (10) to disengage.
Illustration 2 g01445826
Piston motor (hydrostatic system)
(15) Port for the "A" or "B" high pressure loop
(16) Port for the motor case drain
(17) Port for the brake release
(18) Port for the "A" or "B" high pressure loop The hydraulic oil that flows from the hydrostatic piston pump flows into ports (15) and (18). One port will receive the high pressure oil and the other port will be the low pressure oil that is in the return loop. The port that receives the high pressure oil is determined by the desired direction of travel of the machine and the rotation of the motor. The direction of rotation is different for each motor. The motor that is on the right side of the machine will rotate in the opposite direction as the motor that is on the left side. For the following example of the operation of the motor, port (18) is considered to be the high pressure port.The high pressure hydraulic oil flows into port (18). The hydraulic oil then flows through the exposed ports. The exposed ports are part of the rotor (14). The hydraulic oil flows through the exposed ports into the cavity that is below the piston assemblies.The pistons are arranged in a circular pattern in the hydraulic motor. As the oil pressure in the cavity increases, the pistons are forced into the rotor by the angle of plate (3). Plate (3) remains stationary. The high pressure oil in the cavity of the piston begins to expel the piston from the rotor. As the piston begins to move down, the pistons rotate around the plate. The rotor is splined to the shaft (12). Because the rotor is connected to the shaft (12) by splines, the rotor turns the shaft. Shaft (12) is splined to sun gear shaft (7). Sun gear (7) is part of the planetary gear set (6) that drives the ring gear (4). The ring gear (4) is machined into the outer housing (5). The outer housing (5) drives the track on the Multi Terrain Loader. As the rotor turns, the previously exposed ports are covered and the previously covered ports are exposed. The fully extended piston