John Deere 1840: all source data
All 72 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production| Manufacturer | John Deere |
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| (no label) | Utility tractor |
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| (no label) | Built in Mannheim, Baden-Württemberg, Germany |
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| (no label) | The Canadian-market 1840 is similar to the US 2440 model. |
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Engine| (no label) | John Deere 3.9L 4-cyl diesel |
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| Fuel tank | 25.1 gal | 95.0 L |
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Transmission| (no label) | 8-speed unsynchronized gear |
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| (no label) | 8-speed partially synchronized |
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| (no label) | 16-speed two-speed power shift |
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Power| Engine (net) | 70 hp | 52.2 kW |
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| PTO (claimed) | 60 hp | 44.7 kW |
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Mechanical| (no label) | Two- or four-wheel drive |
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| Final drives | planetary |
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| Differential lock | mechanical rear |
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| (no label) | Power steering |
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| (no label) | Wet disc brakes |
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| (no label) | Open operator station. Cab optional. |
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Hydraulics| Type | closed center |
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Hitch| Rear Type | II/I |
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| Control | position and draft control |
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Pto| Rear PTO | independent |
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| Rear PTO Type | 540 (1.375) |
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| Rear PTO Type | 540/1000 (1.375) |
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Dimensions| Wheelbase | 89.7 inches | 227 cm |
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| Weight | 5476 lbs | 2483 kg |
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| Front tire | 7.50-16 |
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| Rear tire | 15.5-38 |
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Electrical| Ground | negative |
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| Charging system | alternator |
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| Charging amps | 33 |
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| Charging amps | 55 |
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| Charging volts | 14 |
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| Batteries | 2 |
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| Battery volts | 12 |
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Engine
Engine detail| (no label) | John Deere |
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| (no label) | diesel |
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| (no label) | 4-cylinder |
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| (no label) | liquid-cooled |
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| Displacement | 239 ci | 3.9 L |
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| Bore/Stroke | 4.19x4.33 inches | 106 x 110 mm |
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| Power (net) | 70 hp | 52.2 kW |
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| Compression | 16.8:1 |
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| Rated RPM | 2500 |
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| Idle RPM | 800-2660 |
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| Operating RPM | 1300-2500 |
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| Torque | 170 lb-ft | 230.5 Nm |
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| Torque RPM | 1300 |
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| Firing order | 1-3-4-2 |
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| Starter volts | 12 |
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| Intake valve clearance | 0.014 inches | 0.356 mm |
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| Exhaust valve clearance | 0.018 inches | 0.457 mm |
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Transmission
Transmission options| (no label) | 8-speed unsynchronized gear |
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| (no label) | 8-speed partially synchronized |
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| (no label) | 16-speed two-speed power shift |
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Transmission| Type | unsynchronized gear |
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| Gears | 8 forward and 4 reverse |
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| Clutch | dry disc |
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| (no label) | Four gears in two ranges, plus reverse range. |
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| Transmission | Top-Shaft Synchronized |
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| Type | partially synchronized |
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| Gears | 8 forward and 4 reverse |
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| (no label) | Four synchronized gears in two ranges, plus reverse range. |
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| Transmission | Hi-Lo |
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| Type | two-speed power shift |
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| Gears | 16 forward and 8 reverse |
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Dimensions
Tires| Ag front | 7.50-16 |
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| Ag rear | 15.5-38 |
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| Ag rear | 16.9-30 |
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Dimensions| Wheelbase | 89.7 inches | 227 cm |
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| Length | 147 inches | 373 cm |
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| Height (hood) | 62 inches | 157 cm |
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| Weight | 5476 lbs | 2483 kg |
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