Deere 850 tractor specifications

1978 - 1989

1978 - 1989 50 Compact SeriesCompact Utility tractorYanmar built

Series:

Series:750 ← 850 → 950870 ↓

1981 - 1988

50 Compact Series

Compact Utility tractor

Yanmar built

Series:

Series:	650 ←	750	→ 850
		770 ↓

Production

Production
Distributor:	John Deere
Manufacturer:	Yanmar
Type:	Compact Utility tractor
Factory:	Japan
Original price:	$7,070 (1983 )
Original price:	$10,000 (1989 )

John Deere 750 Power

John Deere 750 Power
Engine (gross):	20 hp 14.9 kW
PTO (claimed):	18 hp 13.4 kW
Drawbar (tested):	15.30 hp 11.4 kW
PTO (tested):	18.54 hp 13.8 kW
power test details ...

John Deere 750 Engine

John Deere 750 Engine
Yanmar 1.3L 3-cyl diesel
Fuel tank:	6.2 gal 23.5 L
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
	4x4 MFWD 4WD
Steering:	manual
	power optional
Brakes:	differential mechanical dry, internal expanding shoe
Cab:	Two-post ROPS.
Transmission:	8-speed gear
Transmission details ...

Hydraulics

Hydraulics
Type:	open center
Pressure:	2030 psi 140.0 bar
Valves:	1

Tractor hitch

Tractor hitch
Rear Type:	I

Power Take-off (PTO)

Power Take-off (PTO)
Rear PTO:	transmission
Clutch:	over-running
Rear RPM:	540
Engine RPM:	540@2300
Front PTO:	independent*Optional
Clutch:	electro-magnetic

Dimensions & Tires

Dimensions & Tires
Wheelbase:	61.1 inches 155 cm
Weight:	1900 to 2000 pounds
Front tire:	4.00-15
Rear tire:	9.5-24
Full dimensions and tires ...

John Deere 750 attachments

John Deere 750 attachments
60" mid-mount mower deck
snowblower
blade
front-end loader
backhoe
Attachment details ...

750 Serial Numbers

750 Serial Numbers
Location:	Serial number plate on the rear of the John Deere 750, below the PTO shaft.
1981:	1000
1982:	3448
1983:	5613
1984:	8457
1985:	13001
1986:	18501
1987:	22601
1988:	26450
Final:	28161
how to read serial numbers...

Electrical

Electrical
Ground:	negative
Battery volts:	12

Production

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

John Deere 850 Power

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
power test details ...

1978 - 1989

50 Compact Series

Compact Utility tractor

Yanmar built

Series:

Series:	750 ←	850	→ 950
		870 ↓

Nebraska Tractor Test 1280

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.

John Deere 850 Engine

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

1978 - 1989

50 Compact Series

Compact Utility tractor

Yanmar built

Series:

Series:	750 ←	850	→ 950
		870 ↓

Engine Detail

Engine Detail
Yanmar 3T80-J
diesel
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

Mechanical

Mechanical Chassis:4x2 2WD
4x4 MFWD 4WD
Steering:manual
power*Optional
Brakes:differential mechanical expanding shoe
Cab:Two-post ROPS.
Transmission:8-speed gear
Transmission details ...

1978 - 1989

50 Compact Series

Compact Utility tractor

Yanmar built

Series:

Series:	750 ←	850	→ 950
		870 ↓

Transmission

Transmission
Type:	gear
Gears:	8 forward and 2 reverse
Clutch:	210mm dry disc

Speeds

Speeds
With 11.2-24 rear tires.

Capacity

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

Hydraulics

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

Tractor hitch

Tractor hitch Rear Type:I

Power Take-off (PTO)

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

Dimensions & Tires

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 ...

1978 - 1989

50 Compact Series

Compact Utility tractor

Yanmar built

Series:

Series:	750 ←	850	→ 950
		870 ↓

John Deere 850 Tires

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

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
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

John Deere 850 attachments

John Deere 850 attachments 72" mid-mount mower deck snowblower blade front-end loader backhoe Attachment details ...

1978 - 1989

50 Compact Series

Compact Utility tractor

Yanmar built

Series:

Series:	750 ←	850	→ 950
		870 ↓

Attachment overview

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

72" Mower deck

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

Blade

Blade
Type:	front-mount John Deere 423
Width:	72 inches 182 cm
Height:	24 inches 60 cm
Lift height:	14.5 inches 36 cm
Angle:	27°
Weight:	405 lbs 183 kg
Lift type:	hydraulic
Angle type:	manual
	hydraulic*Optional

66" Snow blower

66" Snow blower
Type:	front-mount John Deere 666
	two-stage
Clearing width:	66 inches 167 cm
Clearing height:	28 inches 71 cm
Weight:	612 lbs 277 kg

John Deere 75 Loader

John Deere 75 Loader
Loader weight:	833 lbs 377 kg
Height (to pin):	92 inches 233 cm
Clearance, dumped bucket:	75 inches 190 cm
Dump reach:	24 inches 60 cm
Dump angle:	40°
Reach at ground:	55 inches 139 cm
Breakout force (at pin):	1710 lbs 775 kg
Lift to full height (at pin):	950 lbs 430 kg
Bucket width:	53 inches 134 cm
	61 inches 154 cm

John Deere 8A Backhoe

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

John Deere 1550 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

850 Serial Numbers

850 Serial Numbers Location:Serial number plate on the rear of the John Deere 850, below the PTO shaft.
photo of 850 serial number
1978:1000
1979:3859
1980:7389
1981:11338
1982:12481
1983:14183
1984:16006
1985:18001
1986:22001
1987:25501
1988:28337
Final:30852

how to read serial numbers...