John Deere 1840

The John Deere 1840 is a tractor produced by John Deere. It is equipped with a 239 ci 3.9 L engine. The rated power output is 70 hp 52.2 kW. Transmission: Hi-Lo. Operating weight: 5476 lbs 2483 kg.

Overview

	1979 - 1982 Utility tractor
1979 - 1982
Utility tractor

Production
Manufacturer	John Deere
Utility tractor
Built in Mannheim, Baden-Württemberg, Germany
The Canadian-market 1840 is similar to the US 2440 model.

John Deere 1840 Engine
John Deere 3.9L 4-cyl diesel
Fuel tank	25.1 gal 95.0 L
Engine details ...

John Deere 1840 Power
Engine (net)	70 hp 52.2 kW
PTO (claimed)	60 hp 44.7 kW

Mechanical
Two- or four-wheel drive
Final drives	planetary
Differential lock	mechanical rear
Power steering
Wet disc brakes
Open operator station. Cab optional.

Hydraulics
Type	closed center

Tractor hitch
Rear Type	II/I
Control	position and draft control

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	540 (1.375)
	540/1000 (1.375)

Dimensions & Tires
Wheelbase	89.7 inches 227 cm
Weight	5476 lbs 2483 kg
Front tire	7.50-16
Rear tire	15.5-38
Full dimensions and tires ...

Electrical
Ground	negative
Charging system	alternator
Charging amps	33
	55 *Standard with cab, optional on open station.
Charging volts	14
Batteries	2
Battery volts	12

References
Operator's Manual 145 Loader (OMW21474)
Operator's Manual 1640, 1840 and 2040 Tractors published by John Deere
New Profiles of Performance published in 1979, by John Deere

Engine

Engine Detail — 239 ci / 3.9 L Diesel

Manufacturer	John Deere
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled
Displacement	239 ci 3.9 L
Bore/Stroke	4.19x4.33 inches 106 x 110 mm
Power (net)	70 hp 52.2 kW
Compression	16.8:1
Rated RPM	2500
Idle RPM	800-2660
Operating RPM	1300-2500
Torque	170 lb-ft 230.5 Nm
Torque RPM	1300
Firing order	1-3-4-2
Starter volts	12
Intake valve clearance	0.014 inches 0.356 mm
Exhaust valve clearance	0.018 inches 0.457 mm

Transmission

Transmission options
8-speed unsynchronized gear
8-speed partially synchronized
16-speed two-speed power shift

Transmission — 8 forward and 4 reverse unsynchronized gear

Type	unsynchronized gear
Gears	8 forward and 4 reverse
Clutch	dry disc
Four gears in two ranges, plus reverse range.
With 15.5-38 rear tires.

Transmission — Top-Shaft Synchronized

Transmission	Top-Shaft Synchronized
Type	partially synchronized
Gears	8 forward and 4 reverse
Four synchronized gears in two ranges, plus reverse range.

Transmission — Hi-Lo

Transmission	Hi-Lo
Type	two-speed power shift
Gears	16 forward and 8 reverse

Dimensions

John Deere 1840 Tires
Ag front	7.50-16
Ag rear	15.5-38
Ag rear	16.9-30

Dimensions
Wheelbase	89.7 inches 227 cm
Length	147 inches 373 cm
Height (hood)	62 inches 157 cm
Weight	5476 lbs 2483 kg