Lineage ← Predecessor 8110 1999–2002 · 183 hp This model 8120 2002–2005 · 170 hp
Successor → 8130 2006–2009 · 225 hp Power specifications Engine 208 hp gross Engine, maximum (boost) 230 hp PTO 170 hp claimed PTO, tested 199.7 hp Drawbar 148.4 hp tested Listed power 208 hp engine basis
Engines fitted to the John Deere 8120 John Deere 8.1L 6-cyl dieselDiesel · 6 cyl 496 ci
Engine details John Deere 8.1L 6-cyl diesel Bore × stroke 4.56 in × 5.06 in Rated speed 2,200 rpm Rated power 208 hp Compression 16.5:1 Aspiration turbocharged diesel Cooling liquid-cooled inline Transmissions for the John Deere 8120 John Deere PowerShiftfull power shift 16F / 4R
Transmission notes John Deere PowerShift: Full power shift transmission with single shift lever with display on cab corner post. Tractor begins in 7 (forward) and 2 (reverse) on start up. Clutch pedal may be used to pre-select a gear by holding clutch and pressing lever until desired gear is reached. Automatic PowerShift (APS) allows automated shifting to match load.
Weight specifications Weight 20,060 lb operating Shipping 19,100 lb
Dimensions specifications Wheelbase 123.6 in Length 209.9 in
Capacities specifications Fuel tank 135 gal Hydraulic system 37 gal
Hydraulics specifications System closed center pressure-flow compensated (PFC) Pump flow no record Total flow 33.5 gpm Remote valve flow 30 gpm Pressure 2,900 psi Remote valves 5
Hitch specifications Rear hitch category III,IIIN Rear lift capacity 12,300 lb Front hitch category IIIN Front lift capacity 11,000 lb
PTO specifications Rear PTO independent Rear PTO speeds 1000 (1.75) Clutch hydraulic wet discs Engine rpm at PTO speed 540@1975
Chassis specifications Drive 2WD/4WD Steering hydrostatic power Brakes Hydraulic wet disc brakes Cab Cab standard
Tires specifications Front 11.00-24 Rear 480/80R46
Electrical specifications System voltage 12 V Batteries 2 Cold cranking 925 CCA Charging alternator Charging output 150 A Ground negative
Production specifications Factories Waterloo, Iowa, USA Built by John Deere