Dumpers with Turbocharged Engine are available with Rear tandem axle drive with lockable axle and interaxle differentials. Tatra Vectra Motors Ltd. Offers Dumpers with Turbocharged Engine. Tatra Vectra Motors Ltd. Also supplies tractors. Dumpers with Turbocharged Engine come with Pneumatic, dual circuit air operated, spring released, and self-adjusting Wedge brakes. The Dumper has Single plate clutch with diaphragm spring, hydraulic, control with pneumatic boost. It also comes with 10 forward and 2 reverse gear box, synchromesh with one speed transfer gearbox. It comes with 28 tons payload capacity.