John Deere 840 Specs ( 1976-1986 )
Overview
The John Deere 840 is a utility farm tractor manufactured in Mannheim, Germany, during the production period of 1976 to 1986. It is powered by a 2.9L 3-cylinder diesel engine rated at 37.5 hp and is equipped with a closed-center hydraulic system. The mechanical configuration includes a two-wheel drive system, manual steering, and a shipping weight of 5004 lbs.
Ideal Applications
Transmission and Power Output:
The tractor features either an 8-speed collar shift or 16-speed power shift transmission, providing a claimed 33.5 hp at the live rear PTO.
Hitch and Hydraulic Capacity:
The rear Type II/I hitch is rated for a lift capacity of 4878 lbs, supported by a hydraulic pump flow of 6.1 gpm and a 10.8 gallon system capacity.
Chassis and Engine Specifications:
The 179 ci liquid-cooled engine utilizes direct injection and operates at a rated 2400 RPM within a wheelbase of 74.4 inches.
Production
| Description | Utility tractor / Built in Mannheim, Baden-Württemberg, Germany |
|---|---|
| Manufacturer | John Deere |
Engine
| Engine type | John Deere 2.9L 3-cyl diesel |
|---|---|
| Bore/Stroke | 4.19x4.33 inches (106 x 110 mm) |
| Compression | 16.8:1 |
| Coolant capacity | 11.1 qts (10.5 L) |
| Description | John Deere / diesel / 3-cylinder / liquid-cooled |
| Displacement | 179 ci (2.9 L) |
| Fuel system | direct injection |
| Oil capacity | 7.4 qts (7.0 L) |
| Operating RPM | 1300-2400 |
| Power | 37.5 hp (28.0 kW) |
| Rated RPM | 2400 |
| Starter power | 4 hp (3.0 kW) |
| Starter volts | 12 |
| PTO (claimed) | 33.5 hp (25.0 kW) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 8 forward and 4 reverse / 16 forward and 8 reverse |
| Type | collar shift / two-speed power shift |
| Transmission type | 8-speed collar shift / 16-speed two-speed power shift |
| Transmission type | 8-speed collar shift / 16-speed two-speed power shift |
Mechanical
| Description | Manual steering / Hydraulic wet disc brakes / Four-post ROPS. |
|---|---|
| Drive type | Two-wheel drive |
| Final drives | planetary |
Capacity
| Fuel | 20.6 gal (78.0 L) |
|---|---|
| Hydraulic system | 10.8 gal (40.9 L) |
Hydraulics
| Capacity | 10.8 gal (40.9 L) |
|---|---|
| Pump flow | 6.1 gpm (23.1 lpm) |
| Type | closed center |
Hitch
| Rear lift | 4878 lbs (2212 kg) |
|---|---|
| Rear Type | II/I |
PTO
| Clutch | dry disc |
|---|---|
| Engine RPM | 540@2400 / 1000@2070 |
| Front PTO | optional |
| Front PTO Type | 1000 |
| Rear PTO | live |
| Rear PTO Type | 540 |
Electrical
| Batteries | 2 |
|---|---|
| Battery volts | 12 |
| Charging amps | 33 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Clearance (front axle) | 21 inches (53 cm) |
|---|---|
| Front tread | 49.6 to 79.5 inches (125 to 201 cm) |
| Height (exhaust) | 103.1 inches (261 cm) |
| Height (ROPS) | 94.1 inches (239 cm) |
| Length | 138 inches (350 cm) |
| Rear tread | 53.5 to 73.2 inches (135 to 185 cm) |
| Shipping weight | 5004 lbs (2269 kg) |
| Wheelbase | 74.4 inches (188 cm) |
| Width | 65.4 inches (166 cm) |
| Front tire | 6.50-16 |
| Rear tire | 12.4-32 |
| Weight | 5004 lbs (2269 kg) |
| Wheelbase | 74.4 inches (188 cm) |
| Ag front | 6.50-16 |
| Ag rear | 12.4-32 / 9.5-36 |
References
| Description | Der Neue Traktor 840 published in 1979, by John Deere |
|---|