SUPPORT AS 9W0580 - Caterpillar

Illustration 1 g01355797
Swing Brake Function component connectionsThe Swing Brake Function will allow the operator to immediately stop the machine Swing Function. The Machine Control ECM will monitor the left joystick Swing Brake Switch input circuit and the Swing Pilot Pressure Switch input circuit in order to control Swing Brake. The ECM will use the Swing Brake Solenoid in order to activate the Swing Brake.The Swing Brake Solenoid is connected to a PWM output circuit on the Machine Control ECM, however, the ECM will use this solenoid as an ON/OFF solenoid.During machine operation, when the Swing Brake Solenoid is not energized, the Swing Brake will be ON.The ECM will use the status of the Swing Pilot Pressure Switch input circuit to determine if a swing request is present. When the switch circuit is grounded (contacts closed), the ECM will determine that a swing request is active. When a request for machine swing is present, the ECM will energize the Swing Brake Solenoid in order to turn OFF the Swing Brake. The following machine conditions must be present in order for the ECM to energize the solenoid.
The left console is in the DOWN position.
The Implement Lockout Function is OFF.
The Swing Brake Switch on the left joystick is not pressed (switch contacts open).
Swing is being requested as indicated by the Swing Pilot Pressure Switch (contacts closed).When the Swing Pilot Pressure Switch contacts are opened indicating that swing is no longer requested, the ECM will use a configurable "Swing Brake Delay Time" parameter to de-energize the Swing Brake Solenoid in the set time delay period. The time delay parameter can be configured using Cat ET.If the operator presses the Swing Brake Switch on the left joystick when the machine is swinging, the ECM will immediately de-energize the Swing Brake Solenoid in order to activate the Swing Brake. The operator switch will have priority over all other conditions that can activate the swing brake.Any one of the following conditions will cause the ECM to de-energize the Swing Brake Solenoid in order to immediately activate the swing brake.
The left console is in the UP position.
The implement lockout function is ON.
The Swing Brake Switch on the left joystick is pressed (switch contacts closed).If the position switch for the left armrest is faulted, the ECM will de-energize the Swing Brake Solenoid in order to activate the swing brake.