Challenger 65C, Challenger 65D, Challenger 65E, Challenger 70C, Challenger 75C, Challenger 75D, Challenger 75E, Challenger 85C, Challenger 85D, Challenger 85E and Challenger 95E Agricultural Tractors Machine Performance Panel Caterpillar

Speed Sensor (Engine)

Usage:

70C 2YL

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Illustration 1	g00569851
Engine Speed Sensor

The engine speed sensor is an input of the MPP. The engine speed sensor is located on the flywheel housing of the engine. The purpose of the sensor is for telling the engine speed to the Machine Performance Panel (MPP). The MPP uses the information from the engine speed sensor and the transmission speed sensor to calculate the following values that are shown in the display area:

Engine RPM
PTO RPM
Percentage of track slip

The engine speed sensor measures the speed of the engine. A signal is sent from the sensor to the MPP. This type of sensor is a frequency sensor.

The frequency (Hz) of the signal that is produced by a frequency sensor varies as conditions change. These sensors generate a sine wave signal from passing gear teeth which is sent to the MPP. The MPP measures the signal frequency with one pulse per gear tooth. The MPP calculates the engine RPM.

The signal wire from connector contact 1 of the engine speed sensor connects to contact 8 of connector B of the MPP.

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