The Volvo D-Series excavators span the weight classes between 14 and 28 tons and are fitted with Volvo D4 and D6 IT4 engines. Featuring greased and sealed track chains as standard, each truck is powered by an automatic two-speed shift travel motor, maximizing tractive force. The track brakes are multi-disc, and travel motor, brake and planetary gears are well protected within the track frame. The hydraulics system increases total flow and improves cycle times up to 2.5 percent compared with previous models. An attachment management system can store up to 18 pre-sets and enables hydraulic flow to adjust to meet the requirements of the attachment in use. www.volvoce.com/constructionequipment/na/en-us/pages/BAHome.aspx?sc_cid=vce_na_us_00002