LiuGong CLG835H, Service Manual

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Structure Function Principle
January 24, 2017
Monitoring system CLG835H
Monitoring system
Circuit for engine water temperature indication
This machine uses Perkins Electric Injection Engine whose ECM sends the water temperature (WT) sig-
nal to the meter by CAN bus. The meter microcontroller processes information after reading WT data,
and finally to actuate the engine water-thermometer.
Circuit for torque converter oil temperature indication
The temperature sensor used in the machine is resistance thermometer of contact type and negative
temperature coefficient. The resistance of its internal temperature sensitive elements changes along with
the temperature variation of measured medium, and the higher temperature of measured medium, the
lower resistance of temperature sensitive elements. Once the circuit is connected, the characteristics of
resistance changing with temperature are converted to that of voltage varying with temperature. The
changing voltage signal enters into the microcontroller of combination instrument, which outputs signal
through the operation processing of microcontroller, to drive the stepping motor-type instrument for tem-
perature indication.
P18E00025
P18E00026