John Deere 850

The John Deere 850 is a tractor produced by John Deere. It is equipped with a 78 ci 1.3 L engine. The rated power output is 25 hp 18.6 kW. Transmission: 8 forward and 2 reverse. Operating weight: 1300 lbs 589 kg.

Overview

	1978 - 1989 50 Compact SeriesCompact Utility tractorYanmar built
1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

Production
Distributor	John Deere
Manufacturer	Yanmar
Compact Utility tractor
Built in Japan
Original price	$7,670 (1983 )
	$11,000 (1989 )

John Deere 850 Engine
Yanmar 1.3L 3-cyl diesel
Engine details ...

John Deere 850 Transmission
8-speed gear
Transmission details ...

John Deere 850 Power
Engine (gross)	25 hp 18.6 kW
Drawbar (claimed)	19 hp 14.2 kW
PTO (claimed)	22 hp 16.4 kW
Drawbar (tested)	17.77 hp 13.3 kW
PTO (tested)	22.27 hp 16.6 kW
Performance test details ...

Mechanical
Two- or four-wheel drive
Steering	manual
	power OptOptional
Differential mechanical expanding shoe brakes
Two-post ROPS.

Capacity
Fuel	8.5 gal 32.2 L
Hydraulic system	4.75 gal 18.0 L
	5.25 gal*After 1984 19.9 L

Hydraulics
Type	open center
Capacity	4.75 gal 18.0 L
	5.25 gal*After 1984 19.9 L
Pressure	2030 psi 140.0 bar

Tractor hitch
Rear Type	I
Control	position control

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 PTO Type	540 (1.375)
Engine RPM	540@2258

Dimensions & Tires
Wheelbase	64 inches 162 cm
Weight	2400 lbs 1088 kg
Front tire	5.00-15
Rear tire	9.5-24
Full dimensions and tires ...

Electrical
Ground	negative
Charging system	alternator
Charging amps	25
Battery CCA	570
Battery volts	12
Battery Group	BCI 30H

References
Introducing the John Deere lawn and garden line for 1979
Consumer Products Price List published in 1983, by John Deere
Grounds Care Equipment Purchasing Guide published in 1983, by John Deere
Compact Utility/Utility Tractors Product Information Handbook published in 1983, by John Deere
Operator's Manual 850, 950 and 1050 Tractors (OMRW19870) published in 1984
John Deere 850 and 950 tractors published in 1978
Operator's Manual 850 and 950 Tractors (OMR68993) published in 1978
John Deere tractors 22 to 50 HP published in 1980
Compact Utility Diesel Tractors 14.5 to 40 PTO hp published in 1982, by John Deere
Diesel Tractors 14.5 to 60 PTO hp published in 1984, by John Deere

Engine

	1978 - 1989 50 Compact SeriesCompact Utility tractorYanmar built
1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

Engine Detail — 78 ci / 1.3 L Diesel

Manufacturer	Yanmar 3T80-J
Fuel Type	Diesel
Configuration	3-cylinder, liquid-cooled
Displacement	78 ci 1.3 L
Bore/Stroke	3.15x3.35 inches 80 x 85 mm
Power (gross)	25 hp 18.6 kW
Air cleaner	paper element
Compression	21.2:1
Rated RPM	2600
Starter volts	12
Coolant capacity	6 qts 5.7 L

Transmission

	1978 - 1989 50 Compact SeriesCompact Utility tractorYanmar built
1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

Transmission — 8 forward and 2 reverse gear

Type	gear
Gears	8 forward and 2 reverse
Clutch	210mm dry disc
With 11.2-24 rear tires.

Dimensions

	1978 - 1989 50 Compact SeriesCompact Utility tractorYanmar built
1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

John Deere 850 Tires
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	64 inches 162 cm
Length	117.7 inches 298 cm
Width	53.3 inches 135 cm
Height (hood)	50.8 inches 129 cm
Weight	2400 lbs 1088 kg
Max Drawbar	825 lbs 374 kg
Ground clearance	13.7 inches 34 cm
Front tread	42 to 58 inches 106 to 147 cm
Rear tread	42 to 50 inches 106 to 127 cm

Tests

	1978 - 1989 50 Compact SeriesCompact Utility tractorYanmar built
1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

Nebraska Tractor Test 1280
Diesel 8-speed 2WD June 12 - 21, 1978 Link: Nebraska Tractor Test 1280 file
PTO performance
Power at rated engine speed	22.27 hp 16.6 kW
Fuel use	1.6 gal/hour 6.1 l/hour
Power at rated PTO speed	20.66 hp 15.4 kW
Fuel use	1.4 gal/hour 5.3 l/hour
Drawbar performance
Max power	17.77 hp 13.3 kW
Fuel use	1.6 gal/hour 6.1 l/hour
Gear 6 used for power test.
Max pull	2,699 lbs 1224 kg
Gear 4 used for pull test.

Attachments

	1978 - 1989 50 Compact SeriesCompact Utility tractorYanmar built
1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

1978 - 1989
50 Compact Series
Compact Utility tractor
Yanmar built

Attachment overview
72" mid-mount mower deck
Snowblower
Blade
Front-end loader
Backhoe

72" Mower deck
Type	mid-mount John Deere 72
	3-blade
Cutting width	72 inches 182 cm
Weight	525 lbs 238 kg
Overall width	84 inches 213 cm

John Deere 8A Backhoe
Backhoe type	John Deere 8A Backhoe

John Deere 1550 Backhoe
Backhoe type	John Deere 1550 Backhoe
Weight	1300 lbs 589 kg
Transport height	68 inches 172 cm
Digging depth	93 inches 236 cm
Reach from pivot	131 inches 332 cm
Loading height	65.5 inches 166 cm
Bucket Rotation	180°
Swing Arc	180°
Bucket force	3107 lbs 1409 kg
Dipperstick force	1470 lbs 666 kg