Hydrostatic Drive System
Figure 7. Hydrostatic Drive Torque Hub.
The BMPM has a hydrostatic propulsion system that drives each track independently using a torque hub (Figure
7, Item 1). The propulsion system can generate paving speeds from 0 140 feet per minute (ft/min) (0 42.7
meters per minute (m/min)) with infinitely variable control of each track speed for precision paving accuracy.
Forward or reverse propulsion is controlled by two joysticks. Moving the joysticks forward achieves forward
motion, and moving the joysticks backward achieves reverse motion. Turning is accomplished by moving one
joystick further forward than the other joystick. Travel speeds from 0 360 ft/min (0 110 m/min) are standard on
The hydrostatic drive is a separate subsystem, not connected to any other hydraulic subsystems. The drive
system circuit is isolated from all other hydraulic circuits. No power losses are experienced by the hydrostatic
drive when other hydraulic subsystems are activated.