AD30 Underground Articulated Truck Machine Electrical System Residual Brake Oil/Stop Light Caterpillar


Residual Brake Oil/Stop Light
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Illustration 1g01001136

Residual brake oil/stop light circuit

The components of the residual brake oil/stop light circuit are the residual brake oil pressure indicator, the stop/tail lights, and the residual brake oil/stop light pressure switches.




Illustration 2g00996864

Dash panel

(1) Residual brake oil pressure indicator




Illustration 3g00996865

Rear view of machine

(2) Stop/tail lights




Illustration 4g00996866

Left side view of the transmission compartment

(3) Residual brake oil/stop light pressure switches

With the key start switch in the ON position, 24 volt power is supplied from the batteries via circuit breaker #14 to the residual brake oil/stop light pressure switches.

When the brake pedal is depressed or the retarder is activated, the brake oil pressure increases. As the brake oil pressure increases, residual brake oil/stop light pressure switches (3) are activated. 24 volt power is then supplied to illuminate stop/tail lights (2) and residual brake oil pressure indicator (1). When the brake pedal is released the brake oil pressure decreases, the residual brake oil/stop tail light pressure switches de-activate and the stop/tail lights and the residual brake oil pressure indicator turn off.

If the brake oil pressure does not decrease to a preset pressure, the residual brake oil pressure indicator will remain on to alert the operator.

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