IMPELLER 4B1769 - Caterpillar

Introduction
Some of the components that are connected to the Implement or Transmission ECM can be calibrated by using the Caterpillar Electronic Technician (Cat ET).Calibrations are performed when directed by troubleshooting procedures or replacing a component within the calibrated system.The calibration of a component allows the ECM to determine the correct output level. The calibration also allows the ECM to determine the correct input signal of displacement.For more information on error codes that may occur during calibration refer to Testing and Adjusting , KENR0365-00, "Calibration Error Codes".Required Tools
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Table 1
Required Tools
Tool Item Qty Part
Number Description
C 1 317-7484(1) Communication Adapter Gp
C1 1 370-4617 Cable As (USB PC Communication)
C2 1 317-7485 Communication Adapter III
C3 1 327-8981 Cable As (Data Link)
C4 1 317-7492 Cable As Wireless Radio
C5 1 JERD2129 Caterpillar Electronic Technician (Cat ET)
(1) Cat Electronic Technician (ET) and Software CD, NETG5057 are required when using the communication adapter.Cat ET Calibration Screen
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Implement ECM Calibration Screen
Implement ECM Calibrations
The following calibrations can be performed to the Implement ECM:
Lever Calibrations - Each lever can be calibrated to align the Implement ECM software to the range of physical component. The calibration records the duty cycle at each end of lever travel. Also the calibration ensures that the lever centered duty cycle is within a certain range. This information is then used to calculate a normalized lever position and a lever input command.
Implement Valve Calibrations - Each implement valve solenoid is calibrated so the Implement ECM delivers the current needed to achieve the desired valve stem displacement. For pumped functions (Raise, Rack), the calibration will try to build pressure in the system by upstroking one or more implement pumps. Then, the current to the valve solenoids will be increased and the calibration will monitor the cylinder position for any change. Next, the calibration will destroke the pump(s) back to standby displacement. Then, the current to the valve solenoids will be increased again and the calibration will again monitor the cylinder position for any change. For gravity functions (Lower, Dump), the calibration will increase current to the valve solenoids and determine any change in cylinder position. In both cases, the ECM will record the current when the cylinder starts to move. This information is then used to determine the current needed to crack open the valve, the minimum amount of current needed to start moving the cylinder, and the current required to fully shift the valve stem.
Lockup Clutch Engagement Calibration- Adjusts engagement current to prevent clutch fatigue and slip. The benefit of this calibration is to regulate consistency of shift quality and clutch durability from machine-to-machine.
Neutralization Setpoint and Pedal Calibration - Adjusts percent travel with respect to duty cycle. The benefit of this calibration is to regulate consistency of operation from machine-to-machine
Transmission Fill Calibration - The transmission clutch fill calibration will fine tune each valve to the clutch that is controlled by the valve. If the parameters for the clutch fill are not correct, the quality of the transmission