CORE AS-OIL COOLER 3668881 - Caterpillar

Main Pump Pressure Sensor
Illustration 10 g01113832
Main pump pressure sensor
The main pump pressure sensor is designed to inform the ECM about the discharge pressure of the main pump. The ECM uses this information for the ripper auto stow function. The sensor is located in the man hole and to the right side of the machine and adjacent to the accumulator. The sensor analog voltage and the sensor is an input of the ECM. The ECM receives the analog voltage and the ECM measures the duty cycle in order to determine the pressure. The frequency of this signal is between 0.5V and 4.5V. The ECM provides +8 DCV to the sensor for operating power. The ECM diagnoses diagnostic codes that occur to the signal circuit of the sensor.The diagnostic code that is associated with the main pump pressure sensor is CID 1450. .Tilt Pump Pressure Sensor
Illustration 11 g01113832
Tilt pump pressure sensor
The tilt pump pressure sensor is designed to inform the ECM about the discharge pressure of the main pump. The ECM uses this information for the tilt function of the blade. The sensor is located on the dozer control valve, inside the right fender. The sensor analog voltage and the sensor is an input of the ECM. The ECM receives the analog voltage and the ECM measures the duty cycle in order to determine the pressure. The frequency of this signal is between 0.5V and 4.5V. The ECM provides +8 DCV to the sensor for operating power. The ECM diagnoses diagnostic codes that occur to the signal circuit of the sensor.The diagnostic code that is associated with the tilt pump pressure sensor is CID 0873.Hydraulic Oil Temperature Sensor
Illustration 12 g01113896The sender outputs a voltage signal that corresponds to the temperature of the hydraulic oil. The voltage signal is input to the Implement ECM. This voltage signal will vary representing changes in the hydraulic oil temperatures. As the hydraulic oil temperature changes, the resistance of the sender changes. As the resistance of the sender changes the hydraulic oil temperature gauge in the instrument cluster will change.
Table 1
Temperature Resistance (Ohms)
60° 3°C (140° 5°F) 248.7
90° 3°C (194° 5°F) 91.7
100° 3°C (212° 5°F) 68.0 Inclination Sensor
Illustration 13 g01484373
Dynamic Inclination Sensor
The dynamic inclination sensor provides information about the pitch of the machine. The sensor provides information about the pitch rate of the machine. The sensor provides information about the roll of the machine. The pitch is the measurement of the tractor rotation about the lateral axis or the rear idler. The roll (side slope) is the measurement of the tractor rotation about the longitudinal axis of the tractor. The sensor output is reported to the Implement ECM over the CAN data link. The value (percentage) for the pitch and the data for the side slope can be viewed by using the Advisor. The data for the pitch rate, the pitch, and the roll can be viewed through the Caterpillar Electronic Technician. The inclination sensor is capable of self-diagnosing problems. The sensor