John Deere 840 vs John Deere 8420T - compare
Compare tractors: John Deere 840 vs John Deere 8420T
John Deere 840 vs John Deere 8420T compare - general information
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Brand | John Deere | John Deere |
| Model | John Deere 840 | John Deere 8420T |
| Series | n.d. | n.d. |
| Previous model | – | John Deere 8410T |
| Next model | – | John Deere 8430T |
| Smaller | – | John Deere 8320T |
| Larger | John Deere 940 | John Deere 8520T |
| Years | from 1976 to 1986 y. | from 2002 to 2005 y. |
| Cab with ROPS | No | No |
| Reviews | John Deere 840 reviews New! | John Deere 8420T reviews New! |
John Deere 840 vs John Deere 8420T - performance
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Maximum power (HP / kW) | 35 KM (26.1 kW) | n.d. |
| Engine RPM | 2400 rpm | 2200 rpm |
| Fuel consumption | n.d. | n.d. |
| Fuel tank capacity | n.d. | n.d. |
| Max. speed | n.d. | n.d. |
John Deere 840 vs John Deere 8420T - engine
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Fuel type | Diesel | Diesel |
| Engine producer | n.d. | n.d. |
| Engine model | John Deere | John Deere |
| Engine type | Diesel (diesel engine) | Diesel (diesel engine) |
| Engine capacity | 2.912 l. | 8.179 l. |
| Strokes, qty | n.d. | n.d. |
| Cylinders | 3 | 6 |
| Compression | n.d. | n.d. |
| Bore | 106 mm | 116 mm |
| Stroke | 110 mm | 129 mm |
| Maximum torque | n.d. | n.d. |
| Air filter | n.d. | n.d. |
| Fuel filter | n.d. | n.d. |
| Fuel filter chambers, qty | n.d. | n.d. |
| Oil filter | n.d. | n.d. |
| Oil pump | n.d. | n.d. |
| Speed control (control) | n.d. | n.d. |
| Injection pump | n.d. | n.d. |
| Injectors | n.d. | n.d. |
| Injection pressure | n.d. | n.d. |
| Cooling system | liquid cooled engine | n.d. |
| Forced cooling | n.d. | n.d. |
| Cooler | Yes | |
| Thermostat | Yes | |
| Cooler type | tubular-plate cooler | |
| Coolant system capacity | n.d. | n.d. |
| Clutch | n.d. | n.d. |
John Deere 840 vs John Deere 8420T - turbocharger
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Turbocharger | No | Yes |
| Dual turbocharger | Not applicable | No |
| Intercooler | Not applicable | No |
| Aftercooler | Not applicable | No |
| Wastegate valve | Not applicable | No |
| Variable geometry | Not applicable | No |
| Additional parameters | – | – |
John Deere 840 vs John Deere 8420T - electronics
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Supply voltage starter (V) | 12 V | 12 V |
| Ground | negative ground | negative ground |
| Battery (V) | 12 V | 12 V |
| Battery, qty | 1 | 1 |
| Charging system | Generator | Alternator |
| Charging system producer | n.d. | n.d. |
| Ignition | Manual | Manual |
| Rear stop lamp | Yes | Yes |
| Rear agricultural lamp | n.d. | n.d. |
| Cock lamp | No | No |
John Deere 840 vs John Deere 8420T - PTO
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| PTO rpm | 540 rpm | 1000 rpm |
| PTO control | manual | manual |
John Deere 840 vs John Deere 8420T - brakes
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| ABS | No | No |
| Brake assist | No | No |
| Braking system | n.d. | n.d. |
| Differential | No | No |
| Brake type | disc brakes, wet brakes | disc brakes, wet brakes, hydraulic |
| Discs | Single | Single |
John Deere 840 vs John Deere 8420T - dimensions
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Weight | n.d. | from 11770 kg to 13061 kg (depending by model) |
| Weight with ROPS | n.d. | n.d. |
| Weight with cab | n.d. | n.d. |
| Length | n.d. | 5258 mm |
| Height | n.d. | n.d. |
| Width | n.d. | 2634 mm |
| Clearance | n.d. | n.d. |
| Rear clearance | n.d. | 551 mm |
| Front track width | n.d. | n.d. |
| Rear track width | n.d. | n.d. |
| Wheelbase | 1880 mm | 2260 mm |
| Front tires | 6.50-16 | 16,18,24 |
| Rear tires | n.d. | n.d. |
| Max. mass of the trailer without brakes | 1500 kg | 1500 kg |
| Max. mass of the trailer with brakes | n.d. | n.d. |
| Max. axle load | n.d. | n.d. |
| Max. total weight | n.d. | n.d. |
| Turning radius | n.d. | n.d. |
John Deere 840 vs John Deere 8420T - drive
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Drive system | 4x2, 2WD (depending by model) | (depending by model) |
| Additional | one wheel drive | |
| Permanent 4-wheel drive | n.d. | n.d. |
| Permanent systems that constantly power all the wheels | n/a | n/a |
| Dynamic allocation of power between the axles | n/a | n/a |
| Independent Link Suspension | None | None |
| Articulated suspension | – | – |
| Crawler drive | No | Yes |
| Hydrostatic steering | No | No |
| Differential | n.d. | n.d. |
| Steering | rod | rod |
| Front rods | n.d. | n.d. |
| Rear planetary drives | n.d. | n.d. |
| Front planetary drives | n.d. | n.d. |
John Deere 840 vs John Deere 8420T - hydraulics
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Three-point hitch | n.d. | n.d. |
| Three-point hitch type | n.d. | n.d. |
| Three-point hitch performance | n.d. | n.d. |
| Three-point hitch pressure | n.d. | n.d. |
| Load Sensing | No | No |
| Closed | n.d. | n.d. |
| Central | No | No |
| Constant flow | No | No |
| Constant pressure | No | No |
| Control system | n.d. | n.d. |
| Pump | n.d. | n.d. |
| Two-section distributor | n.d. | n.d. |
| Quick couplings | n.d. | n.d. |
| Auto Lift | n.d. | n.d. |
John Deere 840 vs John Deere 8420T - transmission
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Synchronous transmission | n.d. | n.d. |
| Transmission mechanically synchronized | n/a | No, electro-hydraulic control |
| PowerShift | No | Yes |
| PowerShuttle | No | No |
| Additional | – | two clutches (dual clutch gearbox), electro-hydraulic clutch control, fast shifting |
| Hydrostatic transmission | n.d. | n.d. |
| Forward gears | 8 | 16 |
| Reverse gears | 4 | 4 |
| Creeper | n.d. | n.d. |
John Deere 840 vs John Deere 8420T - equipment
| Specs | John Deere 840 | John Deere 8420T |
|---|---|---|
| Clevis | Yes (???) | Yes (???) |
| Lower catch | n.d. | n.d. |
| Air conditioning | n.d. | n.d. |