The DD22 has a drum width of 39 inches (1000 millimeters) and an operating weight of 5,400 pounds (2450 kilograms). The DD24 has a drum width of 47 inches (1200 millimeters) and an operating weight of 5,725 pounds (2600 kilograms). The front and rear drums on both compactors protrude beyond the frame, making it easier to compact around obstructions without the chassis getting in the way and giving operators a clear view of drum edges.
The propulsion system features hydrostatic drive to both drums in series to provide a quality mat. An optional anti-slip control (ASC) can be added to provide enhanced traction by use of a flow divider, giving the machine the ability to handle the toughest traction demands with ease.
The DD22 and DD24 double drum units are built to produce the right combination of amplitude, centrifugal force and frequency to maximize daily productivity. Both compactors provide the choice of automatic or manual vibration and can operate in three modes: statically, front drum vibration only or both drums vibrating. Two vibrating frequencies ” 3,300 or 4,020 vibrations per minute (55 or 67 hertz) ” allow the DD22 and DD24 to produce smooth, dense mats with a reduced number of passes. At 4,020 vibrations per minute (67 hertz), these compactors have the highest frequency in their class.
Both the DD22 and DD24 have a large water tank that allows the compactor to work for longer intervals. A standard, pressurized water system with hand-serviceable water nozzles is integrated into both units. Water can be controlled by a four-position interval switch and sprays only when the compactor is in motion.
All maintenance points, including filters, the starter motor and injection pump are easily accessible for reduced downtime.