John Deere 840
The John Deere 840 is a tractor produced by John Deere. It is equipped with a 179 ci 2.9 L engine. The rated power output is 37.5 hp 28.0 kW. Transmission: 16 forward and 8 reverse. Operating weight: 5004 lbs 2269 kg.
Engine Power
37.5 hp
28.0 kW
Fuel & Capacities
20.6 gal
78.0 L
Transmission
16 forward and 8 reverse
Operating Weight
5004 lbs
2269 kg
John Deere 840 Serial Number & Year Decoder
Find the exact manufacture year of your tractor by checking your chassis serial number below.
Where to Find the Serial NumberThe serial number plate is commonly located on the front frame, tractor transmission housing (right side), or instrument panel badge.
Overview
 | 1976 - 1986
Utility tractor |
|---|---|
1976 - 1986 | |
Utility tractor | |
Production | |
|---|---|
Manufacturer | John Deere |
Utility tractor | |
Built in Mannheim, Baden-Württemberg, Germany | |
John Deere 840 Engine | |
|---|---|
John Deere 2.9L 3-cyl diesel | |
Engine details ...  |
John Deere 840 Power | |
|---|---|
Engine | 37.5 hp
28.0 kW |
PTO (claimed) | 33.5 hp
25.0 kW |
Mechanical | |
|---|---|
Two-wheel drive | |
Final drives | planetary |
Manual steering | |
Hydraulic wet disc brakes | |
Four-post ROPS. | |
Capacity | |
|---|---|
Fuel | 20.6 gal
78.0 L |
Hydraulic system | 10.8 gal
40.9 L |
Hydraulics | |
|---|---|
Type | closed center |
Capacity | 10.8 gal
40.9 L |
Pump flow | 6.1 gpm
23.1 lpm |
Tractor hitch | |
|---|---|
Rear Type | II/I |
Rear lift | 4878 lbs
2212 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | live |
independent OptOptional | |
Clutch | dry disc |
wet disc *Optional, independent PTO | |
Rear PTO Type | 540 |
Engine RPM | 540@2400 |
Front PTO | optional |
Front PTO Type | 1000 |
Engine RPM | 1000@2070 |
Dimensions & Tires | |
|---|---|
Wheelbase | 74.4 inches
188 cm |
Weight | 5004 lbs
2269 kg |
Front tire | 6.50-16 |
Rear tire | 12.4-32 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Charging amps | 33 |
Batteries | 2 |
Battery volts | 12 |
References | |
|---|---|
 | |
Der Neue Traktor 840 published in 1979, by John Deere |
Engine
Engine Detail — 179 ci / 2.9 L Diesel
Manufacturer | John Deere |
Fuel Type | Diesel |
Configuration | 3-cylinder, liquid-cooled |
Displacement | 179 ci
2.9 L |
Bore/Stroke | 4.19x4.33 inches
106 x 110 mm |
Power | 37.5 hp
28.0 kW |
Fuel system | direct injection |
Compression | 16.8:1 |
Rated RPM | 2400 |
Operating RPM | 1300-2400 |
Starter volts | 12 |
Starter power | 4 hp
3.0 kW |
Oil capacity | 7.4 qts
7.0 L |
Coolant capacity | 11.1 qts
10.5 L |
Transmission
Transmission options | |
|---|---|
8-speed collar shift | |
16-speed two-speed power shift |
Transmission — 8 forward and 4 reverse collar shift
Type | collar shift |
Gears | 8 forward and 4 reverse |
Clutch | dry disc |
Transmission — 16 forward and 8 reverse two-speed power shift
Type | two-speed power shift |
Gears | 16 forward and 8 reverse |
Dimensions
John Deere 840 Tires | |
|---|---|
Ag front | 6.50-16 |
Ag rear | 12.4-32 |
Ag rear | 9.5-36 |
12.4-28 | |
Dimensions | |
|---|---|
Wheelbase | 74.4 inches
188 cm |
Length | 138 inches
350 cm |
Width | 65.4 inches
166 cm |
Height (ROPS) | 94.1 inches
239 cm |
Height (exhaust) | 103.1 inches
261 cm |
Shipping weight | 5004 lbs
2269 kg |
Clearance (front axle) | 21 inches
53 cm |
Front tread | 49.6 to 79.5 inches
125 to 201 cm |
Rear tread | 53.5 to 73.2 inches
135 to 185 cm |
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