Onboard wash system

A wash system for use on a concrete mixer truck having drum, a charge hopper, a collector, and a delivery chute, the wash system comprising:

• a water supply carried by the concrete mixer truck;
• a plurality of spray nozzles mounted on the concrete mixer truck at a plurality of predetermined locations, wherein the predetermined locations cause a spray pattern generated by the plurality of nozzles to cover a plurality of wash areas, the plurality of nozzles comprising, a set of collector nozzles coupled to the collector and configured to provide a washing spray to an inner surface of the collector, and a set of drum nozzles coupled to a portion of the concrete mixer truck and positioned to be adjacent the drum so as to provide a washing spray to an inner surface of the drum and an outer surface of the drum;
• a water distribution system having a plurality of hoses and related manifold devices configured to supply water from the tank to the plurality of spray nozzles;
• and
• a control system coupled to the water distribution system to control the supply of water to the plurality of spray nozzles so that water is selectively provided to the plurality of nozzles, the control system positioned at the rear portion of the concrete mixer truck and accessible by a user from a ground surface and without the need for the user to climb on any portion of the concrete mixer truck, the control system further comprises a plurality of control switches, with a first switch configured to control the collector nozzles, and a second switch configured to control the drum nozzles, and wherein each switch is manually operable and positioned to be operated by a user while still on the ground.