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| Illustration 1 | g00635449 |
Ripper control handle (1) Ripper lift lever (2) Ripper auto stow switch (3) Ripper shank in/out sensor (4) Ripper raise/lower sensor (5) Ripper shank lever | |
The ripper shank in/out sensor (3), the ripper raise/lower sensor (4) and the ripper auto stow switch (2) are components of the ripper control handle. Each of these components are activated by the operator.
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| Illustration 2 | g00334076 |
Ripper Shank In/Out Sensor | |
The ripper shank in/out sensor (3) is designed to tell the ECM the position of the ripper shank lever (5) continuously. The sensor is connected to the ripper shank lever mechanically. The ripper shank lever has three ranges: SHANK OUT, HOLD and SHANK IN. The operator selects the range and the sensor tells the ECM. The sensor is a pulse width modulated sensor (PWM). The sensor is an input of the ECM. The sensor generates a PWM signal continuously. The duty cycle of this signal varies in proportion to the position of the ripper shank lever. The ECM receives the PWM signal. Then, the ECM measures the duty cycle in order to determine the position of the ripper shank lever. The frequency of this signal is constant at approximately 500 Hz. The machine electrical system provides +battery voltage to the sensor for operating power. The sensor can be calibrated by using the Caterpillar Electronic Technician service tool. The VIDS can also be used to calibrate the sensor for the (S/N: 9XR), (S/N: AAF) and (S/N: 7PZ) machines. For more information, see the topic Testing and Adjusting, "Calibration". The ECM diagnoses diagnostic codes that occur to the sensor signal circuit. The diagnostic code that is associated with the ripper shank in/out sensor is CID 0879.
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| Illustration 3 | g00635500 |
Ripper raise/lower sensor | |
The ripper raise/lower sensor (4) is designed to tell the ECM the position of the ripper lift lever (1) continuously. The sensor is connected to the ripper lift lever mechanically. The ripper lift lever has three ranges: RAISE, HOLD and LOWER. The operator selects the range and the sensor tells the ECM. The sensor is a pulse width modulated sensor (PWM) and the sensor is an input of the ECM. The sensor generates a PWM signal continuously. The duty cycle of the signal varies in proportion to the position of the ripper lift lever. The ECM receives the PWM signal. Then, the ECM measures the duty cycle in order to determine the position of the ripper lift lever. The frequency of this signal is approximately 500 Hz. The machine electrical system provides +battery voltage to the sensor for operating power. The sensor can be calibrated by using the Caterpillar Electronic Technician service tool. The VIDS can also be used to calibrate the sensor for the (S/N: 9XR), (S/N: AAF) and (S/N: 7PZ) machines. For more information, see the topic Testing and Adjusting, "Calibration". The ECM diagnoses diagnostic codes that occur to the sensor signal circuit.
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| Illustration 4 | g00635504 |
Ripper auto stow switch | |
The ripper auto stow switch (2) is designed to inform the ECM about the request of the operator. The switch is a momentary push button. The switch has an normally closed input and normally open input to the ECM. The normally closed circuit is closed and the normally open circuit is open, when the switch is placed in the released position. The normally closed circuit opens momentarily and the normally open circuit closes momentarily, when the switch is pressed and then released by the operator. The floating voltage from the ECM that is present at an open switch circuit is 12 DCV. Each switch has two circuits. One of the circuits is normally closed and the other circuit is normally open. These circuits are used for diagnostic purposes. The ECM will detect a failed circuit, if the two circuits of the switch are ever in the same state. A diagnostic code will be logged. The diagnostic code that is associated with the ripper auto stow switch is CID 0881.