HARNESS AS-OPERATOR CONTROLS 2511509 - Caterpillar

Hoe Auxiliary Valve 1 Solenoid 2
Illustration 9 g01237056
The purpose of this feature is to provide the operator a means to control the hydraulic oil flow to the optional 7th valve section on the backhoe valve stack. The operator actuating the proportional device located on the handle of the right backhoe control joystick activates the tool control. When the proportional device is actuated up or down, the ECM reads this input, scales it according to a preset current map, and outputs a current to the appropriate solenoid that is proportional to the input. Certain requirements are necessary upon power-up of a machine to reduce the risk of unexpected movement of the machine and it's tools. The inputs to the system that directly control movement of the tools shall power up in the NEUTRAL state. Because the operator has direct access to the inputs of the system, the ECM will require all associated inputs be read in the NEUTRAL state upon power-up. For the proportional input, the neutral state will be 50% +/- 5% duty cycle from the handle. This 10% tolerance allows for variations from handle to handle. The outputs of the system shall power-up in the OFF state. For the proportional solenoid, the off state is where no electrical current is flowing through the solenoid coils.The solenoid has a connector with two contacts. The sensor ground is connected to the ECM through contact J1-60.