The new Caterpillar D Series mini hydraulic excavators, (303.5D CR, 304D CR, 305D CR and 305.5D CR) are said to be powerful, versatile, compact-radius machines that work comfortably in confined spaces and build on the quality design and reliability of their C Series predecessors (303C CR, 303.5C CR, 304C CR and 305C CR). With model designations closely reflecting their operating weights (3.5-5.5tonnes), the new machines feature enhanced stability for greater productivity, a redesigned work-tool coupler, loa