AD30 Underground Articulated Truck Machine Electrical System Fuel Level Caterpillar


Fuel Level
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Illustration 1g01001145

Fuel level circuit

The components of the fuel level circuit are the fuel level sensor, the fuel level buffer, the AVSpare Monitoring System, the Engine Electronic Control Module (Engine ECM), and the gauge module.




Illustration 2g00996568

Dash panel

(1) AVSpare Monitoring System




Illustration 3g00996569

Left side view of engine

(2) Engine ECM




Illustration 4g00996570

Right side view of transmission compartment

(3) Fuel level buffer

With the key start switch in the ON position, 24 volt power is supplied from the batteries via circuit breaker #10 to the AVSpare Monitoring System and the fuel level buffer. 24 volt power is also supplied via circuit breaker #3 and circuit breaker #11 to the Engine ECM.




Illustration 5g00996578

Top view of fuel tank

(4) Fuel level sensor




Illustration 6g00996579

Dash panel

(5) Fuel level gauge

Fuel level sensor (4) sends a resistance signal to fuel level buffer (3). The fuel level buffer sends a Pulse Width Modulated (PWM) signal to Engine ECM (2). The Engine ECM sends a signal to AVSpare Monitoring System (1) via the AVS Data Link. This signal is sent to the gauge module. Fuel level gauge (5) indicates the level of fuel remaining in the tank.

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