Zetor 5511

The Zetor 5511 is a farm tractor produced by Zetor in Brno, Czechoslovakia from 1968 to 1972. It features a 3.1L 4-cylinder diesel engine producing 56 hp (41.8 kW) with a 10-speed gear transmission. The tractor is two-wheel drive with mechanical rear differential lock and manual steering, with a power steering option on the 5611 variant. It has an open operator station and hydraulic drum brakes. The PTO is live with a 540 RPM rear PTO type. The tractor has a wheelbase of 89 inches (226 cm) and weighs 4950 lbs (2245 kg). It uses 6.00-18 front tires and 13-28 or 11-36 rear tires. The hydraulic system is open center with 2134 psi (147.1 bar) pressure and one valve. The rear hitch is type II/I with position and draft control and a rear lift capacity of 3080 lbs (1397 kg). Variants include the 5511 2WD open, 5545 4WD open, and 5611 2WD cab models.