John Deere 4055-4955
In 1988, the American models transitioned from the 50 series to the 55 series. The engines were thoroughly updated, now offering a 38% increase in torque as well as a constant power output in the RPM range of 1700-2200. The four-wheel drive would disengage when the steering brake was applied to improve turning. The 4755 and 4955 models featured electronic draft sensing. The instrument panel was electronic, and an optional radar-based computer was available. Electronics were also extensively utilized for fault diagnostics.
On the American market, the 4555 model was also known, which was similar in structure and dimensions to the larger models. The smaller models of the 55 series were replaced in 1992 by the new 7000 series. The two largest 55 series models continued in Europe until 1994, but in the USA they were replaced by the 60 series.
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| Model | John Deere 4055 | John Deere 4255 | John Deere 4455 | John Deere 4755 | John Deere 4955 |
|---|---|---|---|---|---|
| Options | |||||
| Manufacturer name | John Deere | John Deere | John Deere | John Deere | John Deere |
| Imported to Finland | Yes | Yes | Yes | Yes | Yes |
| Years | 1988-92 | 1988-92 | 1988-92 | 1988-94 | 1988-94 |
| First year sold | 1988 | 1988 | 1988 | 1988 | 1988 |
| Last year sold | 1992 | 1992 | 1992 | 1994 | 1994 |
| Engine model | 6076T | 6076T | 6076T | 6076A | 6076A |
| Cyl/Turbo/Intercooler | 6T | 6T | 6T | 6TI | 6TI |
| Displacement | 7640 cm³ | 7640 cm³ | 7640 cm³ | 7640 cm³ | 7640 cm³ |
| Bore x stroke | 115,8×120,6 mm | 115,8×120,6 mm | 115,8×120,6 mm | 115,8×120,6 mm | 115,8×120,6 mm |
| Rated power hp/rpm DIN | 128/2200 | 144/2200 | 160/2200 | 190/2200 | 228/2000 |
| Rated power | 128 | 144 | 160 | 190 | 228 |
| Rated speed | 2200 | 2200 | 2200 | 2200 | 2000 |
| Torque Nm/rpm DIN | 550/1210 | 610/1210 | 690/1210 | 820/1210 | 1010/1210 |
| Gears | 15+4 | 15+4 | 15+4 | 15+4 | 15+4 |
| Synchronized gears | powershift | powershift | powershift | powershift | powershift |
| Powershift gears | powershift | powershift | powershift | powershift | powershift |
| Speeds in km/h | 2,4-31,5 | 2,4-31,5 | 2,3-31,4 | 2,3-31,2 | 2,3-31,2 |
| Hydr. flow l/min | 105 l/min | 105 l/min | 105 l/min | 126 l/min | 126 l/min |
| Hydraulic pressure | 175 bar | 175 bar | 175 bar | 175 bar | 175 bar |
| Lift controls | elec. | elec. | elec. | elec. | elec. |
| Lift capacity | 6426 kg | 6426 kg | 6426 kg | 8415 kg | 8415 kg |
| PTO speeds | 540/1000 | 540/1000 | 540/1000 | 1000 | 1000 |
| Brakes | wet disc | wet disc | wet disc | wet disc | wet disc |
| Steering | hydrost. | hydrost. | hydrost. | hydrost. | hydrost. |
| Turning circle m 4WD | 9.8 | 9.8 | 9.8 | 10.8 | 10.8 |
| Front tyres 4WD | 16.9-28 | 16.9-28 | 16.9-28 | 16.9-30 | 16.9-30 |
| Rear tyres 4WD | 20.8-38 | 20.8-38 | 20.8-38 | 20.8-42 | 20.8-42 |
| Weight 4WD | 6890 kg | 6960 kg | 7430 kg | 8600 kg | 8645 kg |
| Height with cab | 296 cm | 296 cm | 296 cm | 302 cm | 302 cm |
| Length (2WD/4WD) | 487 cm | 487 cm | 487 cm | 542 cm | 542 cm |
| Wheelbase (2WD/4WD) | 268 cm | 268 cm | 268 cm | 297 cm | 297 cm |
| Fuel tank | 246 l | 246 l | 246 l | 386 l | 386 l |
| Cab noise level | 76 dB | 76 dB | 77 dB | 76 dB | 76 dB |
| Solid cab | x | x | x | x | x |
| Diff. lock | friction lock | friction lock | friction lock | friction lock | friction lock |
| Autom. differential locks | x | x | x | x | x |
| Air suspension seat | hydr. spring | hydr. spring | hydr. spring | hydr. spring | hydr. spring |
| Air conditioning | x | x | x | x | x |
| Trip computer | opt. | opt. | opt. | opt. | opt. |
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