| Manufacturer |
John Deere |
| Price |
11,000(USD) |
| Model |
850 |
| Equipment Type |
Compact Utility Tractors |
| Factory |
Japan |
NEBRASKA TRACTOR TEST 1280 2
| Description |
Diesel 8-speed 2WD June 12 - 21, 1978 Link: Nebraska Tractor Test 1280 file PTO performance Drawbar performance Gear 6 used for power test Gear 4 used for pull test |
| Power at rated engine speed |
22.27hp / 16.6kW |
| Fuel use |
1.6gal/hour / 6.1l/hour |
| Power at rated PTO speed |
20.66hp / 15.4kW |
| Max power |
17.77hp / 13.3kW |
| Max pull |
2,699lbs / 1224kg |
JOHN DEERE 850 POWER
| Engine (gross) |
25hp / 18.6kW |
| Drawbar (claimed) |
19hp / 14.2kW |
| PTO (claimed) |
22hp / 16.4kW |
| Drawbar (tested) |
17.77hp / 13.3kW |
| PTO (tested) |
22.27hp / 16.6kW |
ENGINE DETAIL
The John Deere 850 tractor is powered by a Yanmar 3T80-J diesel engine, delivering 25 hp at 2600 RPM, making it suitable for light to moderate agricultural tasks. Its 21.2:1 compression ratio and liquid-cooled design enhance efficiency and reduce engine wear, although the compact 1.3L displacement may limit power for heavy-duty applications. The paper element air cleaner provides reliable filtration, ensuring longevity, but may require regular maintenance depending on the operating environment.
| Description |
Yanmar 3T80-J diesel 3-cylinder liquid-cooled |
| Displacement |
78ci / 1.3L |
| Bore/Stroke |
3.15x3.35inches / 80x 85 mm |
| Power (gross) |
25hp / 18.6kW |
| Air cleaner |
paper element |
| Compression |
21.2:1 |
| Rated RPM |
2600 |
| Starter volts |
12 |
| Coolant capacity |
6 qts /5.7 L |
JOHN DEERE 850 ENGINE
The John Deere 850 is powered by a Yanmar 1.3L 3-cylinder diesel engine, offering efficient fuel consumption and reliability suited for small-scale agricultural tasks. Its compact size enhances maneuverability in tight spaces, though the limited horsepower may challenge heavy-duty applications. Ideal for suburban farming or light landscaping, it excels in providing a balance between power and efficiency.
| Description |
Yanmar 1.3L 3-cyl diesel |
TRANSMISSION
The John Deere 850 features an 8 forward and 2 reverse gear configuration, enabling versatile speed control for various field applications. The 210mm dry disc clutch offers robust engagement, though it may require more frequent maintenance than wet clutches under heavy-use scenarios. Ideal for both attachment operation and hauling, this tractor excels in small to mid-sized agricultural tasks, but users should be mindful of clutch wear during intensive operation.
| Type |
gear |
| Gears |
8 forward and 2 reverse |
| Clutch |
210mm dry disc |
SPEEDS
| Description |
With 11.2-24 rear tires |
MECHANICAL
The John Deere 850 tractor's 4x4 MFWD configuration provides superior traction and stability, making it suitable for varied terrains. Its 8-speed gear transmission enables precise speed control, enhancing efficiency for various agricultural tasks. However, the manual steering system may require more effort in tight maneuvers compared to power steering setups, which could pose a challenge in heavy-duty applications.
| Chassis |
4x2 2WD/4x4 MFWD 4WD |
| Steering |
manual/power |
| Brakes |
differential mechanical expanding shoe |
| Cab |
Two-post ROPS |
| Transmission |
8-speed gear |
CAPACITY
| Fuel |
8.5gal / 32.2L |
| Hydraulic system |
4.75gal / 18.0L/5.25gal / 19.9L *After 1984 |
HYDRAULICS
| Type |
open center |
| Capacity |
4.75gal / 18.0L/5.25gal / 19.9L *After 1984 |
| Pressure |
2030psi / 140.0bar |
TRACTOR HITCH
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 |
JOHN DEERE 850 TIRES
The John Deere 850 tractor features versatile tire sizes for both agricultural and lawn/turf applications, allowing for effective field work and landscaping tasks. The Ag front and rear tires (5.00-15 and 9.5-24/11.2-24) provide excellent traction and stability in varied terrains, while the lawn/turf tires (23/8.5-12 and 13.6-16) minimize ground disturbance, making it suitable for delicate areas. A key consideration is the tractor's ability to switch between tire types depending on the work environment, enhancing its functionality for diverse agricultural and landscaping tasks.
| 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 |
DIMENSIONS
| Wheelbase |
64inches / 162cm |
| Length |
117.7inches / 298cm |
| Width |
53.3inches / 135cm |
| Height (hood) |
50.8inches / 129cm |
| Weight |
2400lbs / 1088kg |
| Ground clearance |
13.7inches / 34cm |
| Front tread |
42 to 58inches / 106to 147 cm |
| Rear tread |
42 to 50inches / 106to 127 cm |
DIMENSIONS & TIRES
The John Deere 850 tractor, with a 64-inch wheelbase and a weight of 2,400 lbs, offers enhanced stability for various agricultural tasks, particularly in tight spaces. Its front tire size of 5.00-15 and rear tire size of 9.5-24 provide good traction, though soil compaction may be a concern in heavier clay soils. Overall, this model is ideal for light to medium-duty applications but may struggle with heavier towing requirements due to its lower weight class.
| Wheelbase |
64inches / 162cm |
| Weight |
2400lbs / 1088kg |
| Front tire |
5.00-15 |
| Rear tire |
9.5-24 |
ATTACHMENT OVERVIEW
72
| Type |
mid-mount John Deere 72/3-blade |
| Cutting width |
72inches / 182cm |
| Weight |
525lbs / 238kg |
| Overall width |
84inches / 213cm |
BLADE
| Type |
front-mount John Deere 423 |
| Width |
72inches / 182cm |
| Height |
24inches / 60cm |
| Lift height |
14.5inches / 36cm |
| Angle |
27° |
| Weight |
405lbs / 183kg |
| Lift type |
hydraulic |
| Angle type |
manual/hydraulic |
66
| Type |
front-mount John Deere 666/two-stage |
| Clearing width |
66inches / 167cm |
| Clearing height |
28inches / 71cm |
| Weight |
612lbs / 277kg |
JOHN DEERE 75 LOADER
| Loader weight |
833lbs / 377kg |
| Height (to pin) |
92inches / 233cm |
| Clearance, dumped bucket |
75inches / 190cm |
| Dump reach |
24inches / 60cm |
| Dump angle |
40° |
| Reach at ground |
55inches / 139cm |
| Breakout force (at pin) |
1710lbs / 775kg |
| Lift to full height (at pin) |
950lbs / 430kg |
| Bucket width |
53inches / 134cm/61inches / 154cm |
JOHN DEERE 8A BACKHOE
| Backhoe type |
John Deere 8A Backhoe |
JOHN DEERE 1550 BACKHOE
| Backhoe type |
John Deere 1550 Backhoe |
| Weight |
1300lbs / 589kg |
| Transport height |
68inches / 172cm |
| Digging depth |
93inches / 236cm |
| Reach from pivot |
131inches / 332cm |
| Loading height |
65.5inches / 166cm |
| Bucket Rotation |
180 |
| Swing Arc |
180 |
| Bucket force |
3107lbs / 1409kg |
| Dipperstick force |
1470lbs / 666kg |
850 SERIAL NUMBERS
| Location |
Serial number plate on the rear of the John Deere 850, below the PTO shaft. |
| 1978 |
1000 |
| 1979 |
3859 |
| 1980 |
7389 |
| 1981 |
11338 |
| 1982 |
12481 |
| 1983 |
14183 |
| 1984 |
16006 |
| 1985 |
18001 |
| 1986 |
22001 |
| 1987 |
25501 |
| 1988 |
28337 |
| Final |
30852 |
ELECTRICAL
| Ground |
negative |
| Battery volts |
12 |
