The Claas Arion 660 is a row-crop tractor produced from 2017 onward as part of the Arion 600 Series. It features a John Deere 6.8L 6-cylinder turbocharged intercooled diesel engine delivering 175 hp (130.5 kW) net power with a maximum of 185 hp and boost up to 205 hp. The tractor uses a CMATIC EQ 220 continuously-variable transmission with infinite forward and reverse gears. It has four-wheel drive, electro-hydraulic differential lock, power steering, and hydraulic wet disc brakes. The cab comes standard with air-conditioning. Hydraulics are load sensing with 2900 psi pressure and 2 to 4 valves, with pump flow options of 29.1 gpm or 39.6 gpm. The rear hitch is category III with a lift capacity of 11244 lbs at 24 inches. PTO includes independent rear and optional front PTOs. Dimensions include a 111 inch wheelbase, 189.7 inch length, and 120.1 inch height, with an operating weight of 17328 lbs and max weight of 27558 lbs. Electrical system is 12 volts with negative ground and alternator charging.