The John Deere 850 is a 2WD or 4WD compact utility tractor from the 50 Compact series. This tractor was manufactured by the Yanmar for John Deere in from 1978 to 1989. The JD 850 is equipped with a 1.3 L three-cylinder diesel engine and gear type transmission (8 forward and 2 reverse gears) with dry disc clutch.
The JD 850 compact utility tractor used the Yanmar 3T80-J engine. It is a 1.3 L, 1,278 cm2, (80.0 cu·in) three-cylinder natural aspirated diesel engine with 80.0 mm (3.15 in) of the cylinder bore and 85.0 mm (3.35 in) of the piston stroke. This engine produced 25.3 PS (18.6 kW; 25.0 HP) at 2,600 rpm of maximum output power.
The John Deere 850 is equipped with manual or power (optional) steering, differential mechanical expanding shoe brakes, open operator station with two-post ROPS and 32.2 liters (8.5 US gal.; 7.1 Imp. gal) fuel tank.
Following attachments are available for John Deere 850 compact utility tractor:
- Mid-mount John Deere 172: 72 in (1,820 mm) mower deck
- Front-mount John Deere 423: 72 in (1,820 mm) blade
- John Deere 80 loader
- John Deere 8A backhoe
John Deere 850 Specifications
| General Specifications | |
| Model | John Deere 850 |
| Length | 2,980 mm (117.3 in) |
| Width | 1,350 mm (53.1 in) |
| Height | 1,290 mm (50.8 in) |
| Wheel base | 1,620 mm (63.8 in) |
| Weight | 1,090 kg (2,400 lbs) |
| Fuel tank capacity | 32.2 liters (8.5 US gal.; 7.1 Imp. gal) |
| Battery | 12V |
| Cabin type | Open operator station with two-post ROPS |
| Engine | |
| Engine model | Yanmar 3T80-J |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 3 |
| Fuel type | Diesel |
| Displacement | 1.3 L, 1,278 cm2, (80.0 cu·in) |
| Bore and stroke | 80.0 mm X 85.0 mm (3.15 in X 3.35 in) |
| Compression ratio | 21.2:1 |
| Horsepower | 25.3 PS (18.6 kW; 25.0 HP) at 2,600 rpm |
| Starter | Electric |
| Coolant capacity: | 5.7 L (6.02 US. qt, 5.02 Imp. qt.) |
| Transmission and chassis | |
| Chassis | 4×2 2WD or 4×4 MFWD 4WD |
| Steering type | Manual or power (optional) |
| Brakes | Differential mechanical expanding shoe |
| Transmission model | – |
| Transmission type | Gear type with dry disc clutch |
| Gears | 8 forward and 2 reverse |
| Speed | Forward: 18.8 kmh (11.7 mph) Reverse: 8.7 (5.4 mph) |
| Tires | |
| Front tires | Ag: 5.00-15 Lawn/turf: 23/8.5-12 |
| Rear tires | Ag: 9.5-24, 11.2-24 Lawn/turf: 13.6-16 |
| Three-Point Hitch | |
| Caterogy | I |
| Control type | – |
| Lift capacity | – |
| PTO (Power take-off shaft) | |
| Rear PTO type | Transmission or live two-stage clutch |
| Rear PTO spped | 540 rpm |
| Hydraulic system | |
| Hydraulic type | Open center |
| Hydraulic capacity | 18.0 L (19.02 US. qt, 15.84 Imp. qt.) or 19.5 L (20.61 US. qt, 17.16 Imp. qt.) |
Iam trying to find out what year my tractor is. But serial number tag is missing. I have an 850 john deere
Im not sure you can get that without a data plate or maybe a serial number off the engine block. These were only built from 1978-89.