John deere 850

The John Deere 850 is a compact utility tractor that was produced from 1978 to 1989 as part of the 50 Compact Series. This versatile tractor was manufactured by Yanmar in Japan and distributed under the John Deere brand. Known for its reliability and adaptability, the John Deere 850 is a well-regarded model among enthusiasts and farmers.

Its compact size and durable construction made it suitable for various agricultural tasks, and it could be equipped with a range of attachments, including a mid-mount mower deck, snowblower, blade, front-end loader, and backhoe, enhancing its utility on the farm. The tractor was available in both two-wheel and four-wheel drive configurations to provide flexibility for different operating conditions.

The John Deere 850 was powered by a Yanmar 3-cylinder diesel engine, delivering a respectable amount of horsepower to handle various tasks. Its user-friendly design, ease of maintenance, and optional power steering made it a practical choice for both small and medium-sized farms.

General Information
ManufacturerJohn Deere (Distributor)
Manufacturer of EngineYanmar
Model850
Series50 Compact Series
TypeCompact Utility Tractor
Production LocationJapan
Original Price (1983)$7,670
Original Price (1989)$11,000
Engine Details
Engine TypeYanmar 3T80-J
Fuel TypeDiesel
Number of Cylinders3
CoolingLiquid-cooled
Displacement78 cubic inches (1.3 liters)
Bore/Stroke3.15 x 3.35 inches (80 x 85 mm)
Power (Gross)25 horsepower (18.6 kW)
Air CleanerPaper element
Compression Ratio21.2:1
Rated RPM2600
Starter Voltage12 volts
Coolant Capacity6 quarts (5.7 liters)
Transmission
TypeGear
Number of Gears8 forward and 2 reverse
Clutch210mm dry disc
Power
Engine (Gross)25 horsepower (18.6 kW)
Drawbar (Claimed)19 horsepower (14.2 kW)
PTO (Claimed)22 horsepower (16.4 kW)
Drawbar (Tested)17.77 horsepower (13.3 kW)
PTO (Tested)22.27 horsepower (16.6 kW)
Mechanical Details
DriveTwo- or four-wheel drive
SteeringManual (Power steering optional)
BrakesMechanical expanding shoe brakes
Roll-Over Protection Structure (ROPS)Two-post ROPS
Capacity
Fuel Tank Capacity8.5 gallons (32.2 liters)
Hydraulic System Capacity4.75 gallons (18.0 liters) or 5.25 gallons (19.9 liters)
Hydraulics
TypeOpen center
Hydraulic Pressure2030 psi (140.0 bar)
Tractor Hitch
Rear Hitch TypeCategory I
ControlPosition control
Power Take-off (PTO)
Rear PTO TypeTransmission or live two-stage clutch
Rear PTO Speed540 RPM @ 2258 engine RPM
Tires
Ag Front Tires5.00-15
Ag Rear Tires9.5-24 or 11.2-24
Lawn/Turf Front Tires23/8.5-12
Lawn/Turf Rear Tires13.6-16
Dimensions
Wheelbase64 inches (162 cm)
Length117.7 inches (298 cm)
Width53.3 inches (135 cm)
Height (Hood)50.8 inches (129 cm)
Weight2400 pounds (1088 kg)
Max Drawbar Capacity825 pounds (374 kg)
Ground Clearance13.7 inches (34 cm)
Front Tread Range42 to 58 inches (106 to 147 cm)
Rear Tread Range42 to 50 inches (106 to 127 cm)
Attachment Variants (Optional)
Attachment72″ Mid-Mount Mower Deck
AttachmentSnowblower
AttachmentBlade
AttachmentFront-End Loader
AttachmentBackhoe
72″ Mower Deck Details
TypeMid-mount John Deere 72
Blade Type3-blade
Cutting Width72 inches (182 cm)
Weight525 pounds (238 kg)
Overall Width84 inches (213 cm)
72″ Blade Details
TypeFront-mount John Deere 423
Blade Width72 inches (182 cm)
Blade Height24 inches (60 cm)
Lift14.5 inches (36 cm)
Angling27°
Weight405 pounds (183 kg)
66″ Snow Blower Details
TypeJohn Deere 666
Blower Width66 inches (167 cm)
Clear Height28 inches (71 cm)
MountingFront-mount
Weight612 pounds (277 kg)
Front-End Loader (75 Loader) Details
Lift Capacity (Full at Pin)950 pounds (430 kg)
Breakout Force (at Pin)1710 pounds (775 kg)
Dump Angle40°
Reach (Dumped)24 inches (60 cm)
Reach (Ground)55 inches (139 cm)
Rollback (Ground Line)19°
Height (at Pin)92 inches (233 cm)
Clearance (Dumped)75 inches (190 cm)
Bucket Width53 inches (134 cm) or 61 inches (154 cm)
Backhoe (Optional) Details
Backhoe TypesJohn Deere 8A Backhoe or John Deere 1550 Backhoe
Weight1300 pounds (589 kg)
Transport Height68 inches (172 cm)
Digging Depth93 inches (236 cm)
Reach from Pivot131 inches (332 cm)
Loading Height65.5 inches (166 cm)
Bucket Rotation180°
Swing Arc180°
Bucket Force3107 pounds (1409 kg)
Dipperstick Force1470 pounds (666 kg)
The John Deere 850 is a collector’s gem with significant historical value in the world of vintage tractors. Here’s what makes it special and unique:

Historical Significance: The John Deere 850 is a symbol of a pivotal era in agricultural history. Produced from 1978 to 1989, it marked a period when compact utility tractors were gaining prominence, revolutionizing farming practices.
Yanmar Collaboration: This model’s collaboration with Yanmar, a renowned Japanese manufacturer, brought together the expertise of two respected brands in the world of agriculture. Yanmar’s engineering excellence added to the tractor’s appeal.
Versatility: The John Deere 850’s compact size and adaptability made it suitable for a wide range of farming tasks. It could be equipped with various attachments, from mowers to loaders and backhoes, enhancing its utility and versatility.
Reliability: Known for its robust construction and durability, the 850 earned a reputation for reliability in the field. Its user-friendly design and ease of maintenance endeared it to farmers.
Compact Design: In an era when compact tractors were gaining popularity, the John Deere 850 stood out for its compact yet powerful design. It offered a unique balance of power and maneuverability.
Optional Features: The availability of optional features like power steering added to its appeal, allowing for a more comfortable and efficient farming experience.
Distinctive Appearance: Adorned in the classic John Deere green and yellow color scheme with the iconic branding, the 850 boasts a timeless and visually appealing design.
Collectibility: Due to its historical significance and limited production span, the John Deere 850 has become a sought-after collector’s item. Enthusiasts value it for its rarity and its representation of a transformative period in agriculture.
Cultural Icon: John Deere is synonymous with American farming, and the 850 is a part of this rich heritage. It embodies the spirit of hard work and innovation that has defined American agriculture.
John Deere 850 compact utility tractor is special and unique among tractors due to its historical significance, collaboration with Yanmar, versatility, reliability, compact design, optional features, distinctive appearance, collectibility, and its role as a cultural icon in the world of farming. As a collectible model with historical value, it represents a bygone era while remaining a cherished piece of agricultural history.

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