DESCRIPTION 1994 Mack CH613 Dry Truck (DR12808 Unit 509), diesel engine, 9 speed transmission, tandem axle full screw, air ride suspension, Tyler Side Shooter 16 stainless steel hydraulic dry tender box, dual aluminum fuel tanks, engine brake, 22.5 tires. Serial Number: 1M1AA13Y1RW029266 Notes: This truck has been sitting not used for couple years.