The D3522 Mixer/Pump is composed of our D3522 2-inch hydraulic squeeze pump with infinitely variable speed from 0-6 cubic yards per hour, 9 cu. ft. capacity hydraulic spiral mixer with hydraulic dump, hydraulic agitator in the receiving hopper, and mounted on a high speed single axle trailer with lights and electric braking package. The D3522 Mixer/Pump's primary wear part is the rubber pumping tube that can be replaced in 20 minutes.