The John Deere 840 is a utility tractor produced from 1976 to 1986 in Mannheim, Germany. It features a 2.9L 3-cylinder liquid-cooled diesel engine producing 37.5 hp (28.0 kW) with a PTO power of 33.5 hp (25.0 kW). Transmission options include an 8-speed collar shift and a 16-speed two-speed power shift. The tractor has two-wheel drive with planetary final drives, manual steering, hydraulic wet disc brakes, and a four-post ROPS. Fuel capacity is 20.6 gallons (78.0 L) and hydraulic system capacity is 10.8 gallons (40.9 L) with a closed center hydraulic system and 6.1 gpm pump flow. The rear hitch is category II/I with a lift capacity of 4878 lbs (2212 kg). PTO options include live rear PTO with optional independent and wet disc clutches, and an optional front PTO. Dimensions include a 74.4 inch (188 cm) wheelbase, 138 inch (350 cm) length, and 5004 lbs (2269 kg) shipping weight. Tires are 6.50-16 front and various rear sizes. Electrical system features a 12 volt negative ground with alternator charging at 33 amps and two batteries.
John Deere 840tractorutility tractor2.9L diesel engine37.5 hp8-speed collar shift16-speed power shiftPTOhydraulicsdimensions