The Massey Ferguson 660 is a row-crop tractor from the 600 Series produced from 2003 to 2009 by Massey Ferguson, a part of AGCO. It features a Perkins 6.0L 6-cylinder turbocharged diesel engine delivering 150 hp (111.9 kW) with a 12-speed synchronized transmission. The tractor offers two- or four-wheel drive options, mechanical rear differential lock, and a two-post ROPS with an optional cab. It has a fuel tank capacity of 117.6 gallons (445.1 L) and hydraulic pressure of 3046 psi (210.0 bar) with a pump flow of 15.9 gpm (60.2 lpm). The rear hitch is category II with position and draft control, capable of lifting 9921 lbs (4500 kg) standard and optionally 12125 lbs (5499 kg). The PTO is independent with 540/1000 rpm options. Dimensions include a wheelbase of 115.8 inches (294 cm), length of 191 inches (485 cm), and height up to 117.3 inches (297 cm) with cab. Standard tires are 14.9-28 front and 18.4-38 rear. Electrical system is 12 volts with negative ground.