HANDLE AS-DOOR 3658741 - Caterpillar

Software Installation
Use the WinFlash utility within the Caterpillar Electronic Technician (ET). Flash software file "176-6176.fls" into the engine ECM. The "Direct Fueling Configuration Parameter" must be changed to "ON" in order to activate the direct fuel feature. A factory password must be generated in order to proceed. This is accomplished by contacting a Caterpillar dealer. Once the password is received, enter the password and change the parameter to "ON". Note: This software part number is compatible with 3512B engines only. For 3508B engines, use "178-9617.fls" for flashing. For 3516B engines, use "178-9164.fls". Check with 3500 Customer Service in order to verify the most recent version of this software.Operational Check
Be sure to follow this procedure when you are connecting all the wires.
Ensure that the Emergency Stop Button is in the reset position.
Ensure that the Engine Control Switch is in the OFF position.
Connect the 0 to 200 mA signal to pin 1 and pin 2 of the customer connector or connect the signal to "R1A" and "R2A" of the Converter Control .Note: The external engine control system is now in control of the engine speed. Any increase in the current flow in the signal line will increase the engine speed. Ensure that the external engine control is adjusted in order to provide a proper engine speed when the engine is started.
Apply 24 DCV to the engine.
Start the engine and observe the engine speed.
Stop the engine by turning the Engine Control Switch to "OFF".
Start the engine and observe the engine speed. The external engine control system will increase engine speed by increasing the control current.
Operate the engine at various loads. Some adjustments to the external control system may be necessary to optimize the response.
Stop the engine by turning the Engine Control Switch to OFF. Final Assembly
Secure any loose wires in the EIP with tie straps.
Ensure that all fasteners are tightened to proper torque levels.
Close and secure the door to the EIP.Maintenance
Theory of Operation
Inductor "L1" and resistors ("R1" and "R2") replace the standard load for the actuator. The control signal for the analog speed was originally designed to drive this load. The 0 to 200 mA speed controller must be connected to this impedance. If the speed controller is not connected then the controller may not work correctly for the following reasons:
Some controllers operate by using a switched voltage that requires the 50 mH inductance from the rack actuator.
Some controllers operate by supplying a voltage that requires the rack actuator's 30-50 Ohm resistance to regulate the current.Resistor "R2" converts the 0 to 200 mA signal into a voltage for the voltage converter. This converter provides isolation between the analog speed control and the engine ECM. The 9X-9591 Electrical Converter (Pulse Width Modulated) converts the analog voltage signal from the voltage converter into a PWM signal for the engine ECM. This signal sets the engine fuel rack. The expected conversion of the fuel control hardware is shown in Table 4. Resistor "R3" provides a bias voltage that is used as the negative reference