Maxx Disel 450. The Maxx Diesel 450 is a dependable, high-performance truckmount. Solution temperatures can be fine tuned from 160° to 250° F without the system dumping hot water into the recovery tank. You can also switch off the solution pump for flood restoration work. The Maxx 470's vacuum performance is superior; plus, the machine offers up to 1,200 psi for hard floor cleaning. The extra large recovery tank lets you finish a job, uninterrupted.