550 Wheel Harvester, 570 Wheel Harvester and 580 Wheel Harvester Hydraulic System Caterpillar

Implement Control System

Usage:

570 4XR

The implement control system uses cylinders to control the movement of the boom and the stick. The rotator controls the rotation of the harvester head. The movement of the components are controlled by two joysticks in the cab of the machine. The system is composed of the following components: implement control valve, boom cylinders, stick cylinder, rotator, implement joysticks, extendable stick cylinder and IQAN.

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Illustration 1	g00481595
Diagram of the Implement Control System (1) Left implement joystick (2) Right implement joystick (3) IQAN monitoring and control system (4) Boom cylinders (5) Stick cylinder (6) Rotator (7) Extendable stick cylinder (8) Implement control valve

When the operator moves joystick (1) or (2), current flows from the control lever to IQAN (3). The IQAN then sends current to the corresponding proportional solenoids in implement control valve (8). As the joystick is moved further from the HOLD position the current increases. As the current increases, the speed of the function moves faster.

The magnitude of the current to the proportional solenoids controls the movement of the solenoids. The movement of the solenoids controls the flow of oil to the cylinders and rotator. Increased oil flow will increase the speed of the function.

Operation of the Rotator

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Illustration 2	g00481813
Exploded View of the Rotator (9) Rotor. (10) Shaft. (11) Vane. (12) Stator frame. (13) Stator. (A) Pressure port. (B) Pressure port. (C) Port for the tilt cylinders on the harvester head.

The rotator is a bidirectional hydraulic motor. When pressure oil enters ports (A) or (B) of rotor (9) the harvester head rotates. The oil enters the chamber of stator frame (12). The oil forces vanes (11) to rotate shaft (10). The shaft forces stator (13) and the harvester head to rotate.

Note: Ports (C) are used for oil flow to the tilt cylinders on the harvester head. The oil enters ports (C) and exits through the ports in the bottom of stator (13) .