John Deere
John Deere 850
The John Deere 850 is a compact utility tractor produced from 1978 to 1989. It is part of the 50 Compact Series and was built by Yanmar in Japan. The tractor features a Yanmar 1.3L 3-cylinder liquid-cooled diesel engine producing 25 hp gross. It has an 8-speed gear transmission and offers two- or four-wheel drive options. The 850 includes features such as manual or optional power steering, differential mechanical expanding shoe brakes, and a two-post ROPS. It has a fuel capacity of 8.5 gallons and a hydraulic system capacity of 4.75 gallons, increased to 5.25 gallons after 1984. The rear PTO is a 540 rpm type with a live two-stage clutch introduced in 1984. Dimensions include a 64-inch wheelbase, 117.7-inch length, and 53.3-inch width, with a weight of 2400 lbs. Attachments available include a 72" mid-mount mower deck, snowblower, blade, front-end loader, and backhoe options. The tractor was originally priced at $7,670 in 1983 and $11,000 in 1989.
Power25 hp
Founded1978 - 1989
Model850
Technical Specifications
Detailed specifications and technical data for John Deere 850
Power
| PTO (tested) | 22.27 hp (16.6 kW) |
|---|---|
| PTO (claimed) | 22 hp (16.4 kW) |
| Engine (gross) | 25 hp (18.6 kW) |
| Drawbar (tested) | 17.77 hp (13.3 kW) |
| Drawbar (claimed) | 19 hp (14.2 kW) |
Tires
| Ag rear | 9.5-24, 11.2-24 |
|---|---|
| Ag front | 5.00-15 |
| Lawn/turf rear | 13.6-16 |
| Lawn/turf front | 23/8.5-12 |
Engine
| Type | diesel |
|---|---|
| Model | Yanmar 3T80-J |
| Cooling | liquid-cooled |
| Cylinders | 3-cylinder |
| Rated RPM | 2600 |
| Air cleaner | paper element |
| Bore/Stroke | 3.15x3.35 inches (80 x 85 mm) |
| Compression | 21.2:1 |
| Displacement | 78 ci (1.3 L) |
| Power (gross) | 25 hp (18.6 kW) |
| Starter volts | 12 |
| Coolant capacity | 6 qts (5.7 L) |
Capacity
| Fuel | 8.5 gal (32.2 L) |
|---|---|
| Hydraulic system | 4.75 gal (18.0 L), 5.25 gal (19.9 L) After 1984 |
Dimensions
| Width | 53.3 inches (135 cm) |
|---|---|
| Length | 117.7 inches (298 cm) |
| Weight | 2400 lbs (1088 kg) |
| Wheelbase | 64 inches (162 cm) |
| Rear tread | 42 to 50 inches (106 to 127 cm) |
| Front tread | 42 to 58 inches (106 to 147 cm) |
| Max Drawbar | 825 lbs (374 kg) |
| Height (hood) | 50.8 inches (129 cm) |
| Ground clearance | 13.7 inches (34 cm) |
Electrical
| Ground | negative |
|---|---|
| Battery CCA | 570 |
| Battery Group | BCI 30H |
| Battery volts | 12 |
| Charging amps | 25 |
| Charging system | alternator |
Hydraulics
| Type | open center |
|---|---|
| Capacity | 4.75 gal (18.0 L), 5.25 gal (19.9 L) After 1984 |
| Pressure | 2030 psi (140.0 bar) |
Mechanical
| ROPS | Two-post ROPS |
|---|---|
| Drive | Two- or four-wheel drive |
| Brakes | Differential mechanical expanding shoe brakes |
| Steering | manual, power Optional |
Production
| Type | Compact Utility tractor |
|---|---|
| Built in | Japan |
| Distributor | John Deere |
| Manufacturer | Yanmar |
| Original price | $7,670 (1983), $11,000 (1989) |
Attachments
| Backhoes | John Deere 8A BackhoeJohn Deere 8A Backhoe John Deere 1550 Backhoe{"Weight":"1300 lbs (589 kg)","Swing Arc":"180°","Bucket force":"3107 lbs (1409 kg)","Digging depth":"93 inches (236 cm)","Loading height":"65.5 inches (166 cm)","Bucket Rotation":"180°","Reach from pivot":"131 inches (332 cm)","Transport height":"68 inches (172 cm)","Dipperstick force":"1470 lbs (666 kg)"} |
|---|---|
| Overview | 72" mid-mount mower deck, Snowblower, Blade, Front-end loader, Backhoe |
| 72" Blade | Lift14.5 inches (36 cm) ModelJohn Deere 423 Mountfront-mount Width72 inches (182 cm) Height24 inches (60 cm) Weight405 lbs (183 kg) Angling27° Lift typehydraulic-lift Angle controlmanual-angle hydraulic -angle Optional |
| 75 Loader | Weight833 lbs (377 kg) Dump angle40° Dump reach24 inches (60 cm) Bucket width53 inches (134 cm), 61 inches (154 cm) Ground reach55 inches (139 cm) Boom cylinder2 inches (5 cm) Height at pin92 inches (233 cm) Lift capacity950 lbs (430 kg) full at pin Breakout force1710 lbs (775 kg) at pin Dump clearance75 inches (190 cm) Rollback angle19° ground line |
| 72" Mower deck | Typemid-mount John Deere 72 Blades3-blade Weight525 lbs (238 kg) Cutting width72 inches (182 cm) Overall width84 inches (213 cm) |
| 66" Snow blower | Typetwo-stage ModelJohn Deere 666 Mountfront-mount Width66 inches (167 cm) Weight612 lbs (277 kg) Clear height28 inches (71 cm) |
Transmission
| Type | 8-speed gear |
|---|
Tractor hitch
| Control | position control |
|---|---|
| Rear Type | I |
Serial Numbers
| 1978 | 1000 |
|---|---|
| 1979 | 3859 |
| 1980 | 7389 |
| 1981 | 11338 |
| 1982 | 12481 |
| 1983 | 14183 |
| 1984 | 16006 |
| 1985 | 18001 |
| 1986 | 22001 |
| 1987 | 25501 |
| 1988 | 28337 |
| Final | 30852 |
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 |
|---|---|
| Engine RPM | 540@2258 |
| Rear PTO Type | 540 (1.375) |
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