Tractor reference
John Deere 6R 120
Specifications, maintenance, parts and compatibility reference.
Specification set: United States - Current US / 2026 North America specification Engine and electrical data use the 5 May 2026 Deere price book. US comparison-page values are used for PTO, transmission and hydraulics when available.
Engine
Engine modelJohn Deere PowerTech PSS
Rated engine power120 hp
Maximum engine power130 hp
Rated engine power with IPM138 hp
Maximum engine power with IPM143 hp
Engine displacement4.5 L
Cylinders4
Rated engine speed2100 rpm
AspirationDual turbochargers, wastegate turbo with fixed geometry turbo in series
EmissionsFinal Tier 4
Transmission
Standard transmissionJohn Deere AutoPowr/IVT 25 mph (40 km/h)
Transmission optionsAutoPowr/IVT 31 mph (50 km/h); 24-speed AutoQuad Plus ECO 25 mph (40 km/h) or 31 mph (50 km/h)
PTO
PTO power91 hp
Hydraulics
Standard pump rated output30.1 gpm (114 L/min)
Optional pump rated output40.9 gpm (155 L/min)
Capacities
DEF tank capacity13 L
Electrical
Battery12 V / 174 A
Alternator14 V / 250 A