WIRING GP-SENSOR 3843507 - Caterpillar

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(1) Electric drive pump (secondary steering and brake release)
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(2) Brake release and secondary steering switchSecondary steering and brake release electric drive pump (1) can be used to release the parking brakes. Secondary steering and brake release electric drive pump (1) is energized by brake release and secondary steering switch (2). Secondary steering and brake release electric drive pump (1) sends oil through the diverter valve and the parking brake release valve in order to release the parking brakes.Note: Air pressure is also required to release the parking brakes. The piston chamber in the parking brake release valve must be pressurized in order for the oil from secondary steering and brake release pump (1) to flow to the brakes.Note: The diverter valve must be switched in order to release the parking brakes.