Abstract: A blower drive system for a vehicle such as a vacuum truck includes a blower including a blower input shaft and a blower housing; a transfer case operably connected to transfer drive from the vehicle engine driveline to the blower input shaft; a frame bracket assembly including one or more connections to the vehicle chassis frame and one or more connections to the blower housing. The frame bracket assembly mounts the blower housing in a specified fixed angle with respect to ground and mounts the bottom of the blower housing in a specified fixed height above the vehicle chassis frame.

Abstract: A system for varying the weight over one or more axles of a truck carrying a container, the container, the truck and the one or more axles being arranged in the manner of a vacuum tank mounted on a vacuum truck having a front axle and one or more rear axles, the system including: a telescopic subframe comprising one or more elongate structures, each elongate structure having a fixed part and a telescoping part telescopically engaged with the fixed part, and each fixed part fixedly attached to a mounting frame of the truck so that the telescopic subframe lays substantially horizontally on the mounting frame; and one or more hydraulic cylinders operable by a controller, each hydraulic cylinder attached to and operably coupling the truck and the vacuum tank.