| Manufacturer | John Deere |
| Price | 122,694(USD) |
| Model | 8850 |
| Equipment Type | Four-wheel Drive 4WD Tractors |
| Factory | Waterloo, Iowa, USA |
NEBRASKA TRACTOR TEST 1434 2
| Description | Diesel Quad-Range 4WD May 11 - 21, 1982 Link: Nebraska Tractor Test 1434 file PTO performance Drawbar performance |
| Power at rated engine speed | 303.99hp / 226.7kW |
| Fuel use | 19.2gal/hour / 72.7l/hour |
| Max power | 269.77hp / 201.2kW |
| Max pull | 35,330lbs / 16025kg |
JOHN DEERE 8850 POWER
| Engine | 370hp / 275.9kW |
| PTO (claimed) | 300hp / 223.7kW |
| Drawbar (tested) | 269.77hp / 201.2kW |
| PTO (tested) | 303.99hp / 226.7kW |
ENGINE DETAIL
The John Deere 8850 features a robust intercooled turbocharged V8 engine, providing 370 hp, ideal for heavy-duty agricultural tasks. Its substantial 15.7L displacement and long stroke design (5.00 inches) enhance torque delivery at lower RPMs, making it suitable for plowing and tilling operations. However, the high compression ratio of 15.5:1 may necessitate careful fuel selection to avoid knocking, and its significant oil (51 quarts) and coolant capacities indicate a robust design but may pose challenges in maintenance due to the volume of fluids involved.
| Description | John Deere intercooled turbocharged diesel 8-cylinder liquid-cooled V8 |
| Displacement | 955ci / 15.7L |
| Bore/Stroke | 5.51x5.00inches / 140x 127mm |
| Power | 370hp / 275.9kW |
| Compression | 15.5:1 |
| Rated RPM | 2100 |
| Starter volts | 12 |
| Oil capacity | 51qts / 48.3L |
| Coolant capacity | 78qts / 73.8L |
JOHN DEERE 8850 ENGINE
The John Deere 8850 is equipped with a powerful 15.7L 8-cylinder diesel engine, delivering robust torque for heavy-duty applications. This high displacement engine provides excellent fuel efficiency and reliability, making it suitable for demanding agricultural tasks. However, its large size may also present challenges in maneuverability in tighter fields or confined spaces.
| Description | John Deere 15.7L 8-cyl diesel |
TRANSMISSION
The John Deere 8850 features a Quad-Range transmission with a partial power shift, providing 16 forward and 6 reverse gears, which allows for efficient speed management across various field conditions. The Perma-Clutch hydraulic wet disc system enhances durability, yet the requirement to stop the tractor for range selection may challenge operational efficiency during tasks requiring frequent range changes. Ideal for tasks demanding consistent power, such as heavy tillage, the setup provides a robust performance, though operators must adapt to the clutch usage for gear synchronization.
| Transmission | Quad-Range |
| Type | partial power shift |
| Gears | 16 forward and 6 reverse |
| Clutch | Perma-Clutch hydraulic wet discs |
| Oil capacity | 182qts / 172.2L |
| Description | Tractor must be stopped to select one of four ranges. Clutchless power shift between speeds 1-2 and 3-4 in range. A synchronized shift (using clutch) can be made between 2 and 3 in range |
SPEEDS
| Description | 20.8-38 tires |
MECHANICAL
The John Deere 8850 features a robust 4x4 articulated 4WD chassis, providing excellent traction and maneuverability in varied terrain. Its inboard compound planetary final drives enhance durability and efficiency, while the electro-hydraulic differential lock improves traction during challenging conditions. The partial power shift transmission allows smooth gear transitions, optimizing performance for heavy-duty tasks; however, this complexity may require more maintenance compared to simpler systems.
| Chassis | 4x4 articulated 4WD |
| Final drives | inboard compound planetary |
| Differential lock | electro-hydraulic front and rear |
| Steering | articulated power |
| Brakes | power wet disc |
| Cab | Sound-Gard cab with air-conditioning |
| Transmission | 16-speed partial power shift |
CAPACITY
| Fuel | 240gal / 908.4L |
| Hydraulic system | 45.5gal / 172.2L |
HYDRAULICS
| Type | closed center constant-pressure |
| Capacity | 45.5gal / 172.2L |
| Valves | 3 to 4 |
| Pump flow | 44gpm / 166.5lpm |
TRACTOR HITCH
| Rear Type | 4/4N |
| Control | lower-link draft sensing |
| Rear lift | 10,250lbs / 4649kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | hydraulic wet disc |
| Rear RPM | 1000 (1.75) |
JOHN DEERE 8850 TIRES
The John Deere 8850 features large tire options (20.8-42 for both front and rear), enhancing traction and stability in various agricultural tasks. However, using such large tires can limit maneuverability in tighter spaces, necessitating planning for field layouts. Its versatility allows for configurations with multiple rear tire sizes, accommodating different soil types and load requirements effectively.
| Ag front | 20.8-42 |
| Ag rear | 20.8-42 23.1-34 24.5-32 30.5L-32 20.8-42 |
DIMENSIONS
| Wheelbase | 133inches / 337cm |
| Length | 257.8inches / 654cm |
| Shipping weight | 37,480lbs / 17000kg |
| Operating weight | 37,700lbs / 17100kg |
| Front axle | 4.331 by 127.5inches / 110by 3238mm |
| Rear axle | 4.331 by 127.5inches / 110by 3238mm |
DIMENSIONS & TIRES
The John Deere 8850's wheelbase of 133 inches provides stability and maneuverability, making it suitable for heavy-duty operations. Weighing between 37,480 to 37,700 pounds, it offers substantial traction, especially with 20.8-38 tires, optimizing performance in various soil conditions. However, the heavier weight may pose challenges in transport and require adequate towing equipment for efficiency.
| Wheelbase | 133inches / 337cm |
| Weight | 37480 to 37700 pounds |
| Front tire | 20.8-38 |
| Rear tire | 20.8-38 |
BLADE
| Type | front-mount John Deere 866 |
| Width | 168inches / 426cm |
| Height | 38inches / 96cm |
| Lift height | 20inches / 50cm |
| Angle | 18° |
| Cut depth | 6 inches /15 cm |
| Lift type | hydraulic |
| Angle type | hydraulic |
8850 SERIAL NUMBERS
| Location | Serial number plate on the rear of the tractor |
| 1982 | 2000 |
| 1983 | 4000 |
| 1984 | 5101 |
| 1985 | 6001 |
| 1986 | 6501 |
| 1987 | 7001 |
| 1988 | 7501 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 110 |
| Batteries | 3 |
| Battery CCA | 625 |
| Battery volts | 12 |