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| info | |
| 1978 - 1989 50 Compact Series, Compact Utility tractor | |
| Next model: | John Deere 870 |
| Series next: | John Deere 950 |
| Series back: | John Deere 750 |
| Production | |
| Distributor: | John Deere |
| Manufacturer: | Yanmar |
| Factory: | Japan |
| Original price (USD), $11,000 (1989 ), | |
| Capacity | |
| Fuel: | 8.5 gal [32.2 L] |
| Hydraulic system: | 4.75 gal [18.0 L], 5.25 gal [19.9 L] *After 1984 |
| 3-Point Hitch | |
| Rear Type: | I |
| Power Take-off (PTO) | |
| Rear PTO: | transmission*Early models, through the 1983 model year., live two-stage clutch*Introduced in 1984, tractor serial number 16001. |
| Rear RPM: | 540 (1.375) |
| Engine RPM: | 540@2258 |
| Dimensions & Tires | |
| Wheelbase: | 64 inches [162 cm] |
| Weight: | 2400 lbs [1088 kg] |
| Front tire: | 5.00-15 |
| Rear tire: | 9.5-24 |
| 850 Serial Numbers | |
| Location: | Serial number plate on the rear of the John Deere 850, below the PTO shaft. |
| John Deere 850 Power | |
| Engine (gross): | 25 hp [18.6 kW] |
| Drawbar (claimed): | 19 hp [14.2 kW] |
| PTO (claimed): | 22 hp [16.4 kW] |
| Drawbar (tested): | 17.77 hp [13.3 kW] |
| PTO (tested): | 22.27 hp [16.6 kW] |
| Mechanical | |
| Chassis: | 4x2 2WD, 4x4 MFWD 4WD |
| Steering: | manual, power*Optional |
| Brakes: | differential mechanical expanding shoe |
| Cab: | Two-post ROPS. |
| Hydraulics | |
| Type: | open center |
| Capacity: | 4.75 gal [18.0 L], 5.25 gal [19.9 L] *After 1984 |
| Electrical | |
| Ground: | negative |
| Battery | |
| Number: | 1 |
| Volts: | 12 |
| info | |
| Bore/Stroke: | 3.15x3.35 inches [80 x 85 mm] |
| Power (gross): | 25 hp [18.6 kW] |
| Air cleaner: | paper element |
| Compression: | 21.2:1 |
| Rated RPM: | 2600 |
| Starter volts: | 12 |
| Coolant capacity: | 6 qts [5.7 L] |
| Engine Detail | |
| Yanmar 3T80-J, diesel, 3-cylinder, liquid-cooled, 78 ci [1.3 L] |
| info | |
| Speeds: | With 11.2-24 rear tires. |
| Transmission | |
| Type: | gear |
| Gears: | 8 forward and 2 reverse |
| Clutch: | 210mm dry disc |
| info | |
| Next model: | John Deere 870 |
| Series next: | John Deere 950 |
| Series back: | John Deere 750 |
| Dimensions | |
| Weight: | 2400 lbs [1088 kg] |
| Wheelbase: | 64 inches [162 cm] |
| Length: | 117.7 inches [298 cm] |
| Width: | 53.3 inches [135 cm] |
| Height (hood): | 50.8 inches [129 cm] |
| Ground clearance: | 13.7 inches [34 cm] |
| Front tread: | 42 to 58 inches [106 to 147 cm] |
| Rear tread: | 42 to 50 inches [106 to 127 cm] |
| John Deere 850 Tires | |
| Ag front: | 5.00-15 |
| Ag rear: | 9.5-24, 11.2-24 |
| Lawn/turf front: | 23/8.5-12 |
| Lawn/turf rear: | 13.6-16 |
| info | |
| Next model: | John Deere 870 |
| Series next: | John Deere 950 |
| Series back: | John Deere 750 |
| 72" Mower deck | |
| Type: | mid-mount John Deere 172, 3-blade |
| Cutting width: | 72 inches [182 cm] |
| Blade | |
| Type: | front-mount John Deere 423 |
| Width: | 72 inches [182 cm] |
| Loader | |
| Loader type: | John Deere 80 |
| Backhoe | |
| Backhoe type: | John Deere 8A |