Technical Specifications of the Zetor Forterra 8641 agricultural tractor:
Zetor Forterra 8641 agricultural tractor was produced from 1999 to 2000. It features the 1203 engine, which has four cylinders with turbocharging (4T). The engine displacement is 4156 cm³, with piston dimensions of 105 mm in diameter and 120 mm in stroke. The engine achieves a maximum power of 85 HP at 2200 revolutions per minute and a torque of 297 Nm at 1450 revolutions per minute. The gearbox has 24 forward gears and 18 reverse gears, all of which are synchronized, and the gearbox is equipped with three fast gears. The reverse is mechanically controlled. The tractor can travel at speeds from 1.9 km/h to a maximum of 36 km/h. The hydraulic pump output is 60 liters per minute. The rear lift is mechanically or electronically controlled (EHR) and has a maximum lift capacity of 4800 kg. The power take-off (PTO) operates at 540 or 1000 revolutions per minute. The braking system is hydraulically controlled. The turning radius for the 4WD version is 9.9 meters. The front tire size for the 4WD version is 13.6-24, and the rear tire size is 18.4-34. The total weight of the 4WD version is 3950 kg. The tractor’s dimensions are: height with cab 267 cm, length 437 cm, and width 238 cm. The fuel tank capacity is 180 liters. The noise level in the cab is 79 dB.
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Technical Data Sheet for Zetor Forterra 8641, 9641, 10641, 11641, 11441, 11741, 12441 agricultural tractors:
| Model | Zetor Forterra 8641 | Zetor Forterra 9641 | Zetor Forterra 10641 | Zetor Forterra 11641 | Zetor Forterra 11441 | Zetor Forterra 11741 | Zetor Forterra 12441 |
| Years of production | 99-00 | – | – | – | – | – | – |
| Engine model / type | 1203 | 1003 | 1303 | 1006.6W | 1403 | 1006.6WT | 1504 |
| Number of cylinders / turbocharging | 4T | 4T | 4TI | 6 | 4TI | 6T | 4TI |
| Engine displacement (cm3) | 4156 | 4156 | 4156 | 6000 | 4156 | 6000 | 4156 |
| Piston dimension / stroke (mm) | 105×120 | 105×120 | 105×120 | 105×115,5 | 105×120 | 105×115,5 | 105×120 |
| Maximum engine power (hp) / rpm | 85/2200 | 95/2200 | 105/2200 | 110/2200 | 110/2200 | 120/2350 | 122/2200 |
| Torque (Nm) / rpm | 297/1450 | 373/1600 | 392/1500 | 390/1500 | 480/1550 | 480/1300 | 525/1500 |
| Number of gears (front + rear) | 24+18 | 24+18 | 24+18 | 24+18 | 24+18 | 24+18 | 24+18 |
| Number of synchronized gears (front+rear) | 24+18 | 24+18 | 24+18 | 24+18 | 24+18 | 24+18 | 24+18 |
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| Speed-Shift | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Type of reverse | mech | mech | mech | mech | mech | mech | mech |
| Driving speed (km/h) | 1,9-36 | 1,9-37 | 1,9-37 | 1,9-38 | 1,9-40 | 1,9-40 | 1,9-37,9 |
| Max Driving speed (km/h) | – | – | – | – | 43 | 44 | 40 |
| Hydraulic pump capacity (L/min) | 60 | 60 | 60 | 60 | 70 | 70 | 70 |
| 3-Point Hitch control | mech/ehr | mech/ehr | mech/ehr | mech/ehr | ehr | ehr | ehr |
| 3-point hitch max load (kg) | 4800 | 4800 | 4800 | 5800 | 5850 | 5850 | 5850 |
| PTO speed (rpm) | 540/1000 | 540/1000 | 540/1000 | 540/1000 | 540/1000 | 540/1000 | 540/1000 |
| Disc brake type (dry / wet) | – | – | – | – | – | – | – |
| Type of control of the braking system | hydr | hydr | hydr | hydr | hydr | hydr | hydr |
| Turning radius 2WD (m) | – | – | – | – | – | – | – |
| Turning radius 4WD (m) | 9,9 | 9,9 | 9,9 | 10,9 | 9,6 | 10,2 | 9,6 |
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| Front wheel 2WD | – | – | – | – | – | – | – |
| Front wheel 4WD | 13,6-24 | 14,9-24 | 14,9-24 | 420/70R24 | – | 420/70R24 | |
| Rear wheel 2WD | – | – | – | – | – | – | – |
| Rear wheel 4WD | 18,4-34 | 16,9-38 | 16,9-38 | 520/70R38 | – | 520/70R38 | |
| 2WD total weight (kg) | – | – | – | – | – | – | – |
| 4WD total weight (kg) | 3950 | 3950 | 4100 | 4450 | 4590 | 4900 | 4660 |
| Total height with cabin (cm) | 267 | 271 | 271 | 271 | 278 | 281 | 283 |
| Total length (cm) | 437 | 437 | 437 | 464 | 467 | 496 | 467 |
| Total width (cm) | 238 | 238 | 238 | 265 | 239 | 266 | 239 |
| Fuel tank capacity (l) | 180 | 180 | 180 | 180 | 180 | 180 | 180 |
| Cabin sound level (dB) | 79 | 79 | 79 | 79 | 81 | 79 | 81 |
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