Description Overview American model 9310 crawler crane Year: 1975 Engine: Detroit Diesel Condition Running condition: great Works and runs great Inspected: July 15, 2014 Specifications Boom length: 130 feet Walking chains: 56 feet in length (replaced in 2009) Walking pad: 50 inches in width Other: 6 x 25 hand lay Cable Cable replaced in 2006 Cable size: main hoist drum 1 1/8, auxiliary hoist drum 1 1/8 Psi: 1,032