Technical Specifications of the Zetor 4911/4945 agricultural tractor:
Zetor 4911/4945 agricultural tractor was produced from 1977 to 1980. It features the Z 4901 engine, which has three cylinders. The engine displacement is 2696 cm³, with piston dimensions of 102 mm in diameter and 110 mm in stroke. The engine achieves a maximum power of 45 HP at 2200 revolutions per minute and a torque of 142 Nm at 1450 revolutions per minute. The gearbox has 10 forward gears and 2 reverse gears, with 4 synchronized gears. The tractor can travel at speeds from 1.1 km/h to a maximum of 25.7 km/h, with a maximum driving speed of 27 km/h. The hydraulic pump output is 20 liters per minute. The rear lift is mechanically controlled and has a maximum lift capacity of 1350 kg. The power take-off (PTO) operates at 540 or 1000 revolutions per minute. The braking system is mechanically controlled. The front tire size for the 2WD version is 7.50-16, and for the 4WD version, it is 11.2-24. The rear tire size for the 2WD version is 12.4-36, and for the 4WD version, it is 16.9-30. The total weight of the 2WD version is 2580 kg, and the 4WD version is 3380 kg. The tractor’s dimensions are: length 338 cm, and width 198 cm. The fuel tank capacity is 55 liters. The noise level in the cab is 87 dB.
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Technical Data Sheet for Zetor 4911, 4945, 5911, 5945, 6911, 6945 agricultural tractors:
| Model | Zetor 4911/4945 | Zetor 5911/5945 | Zetor 6911/6945 |
| Years of production | 77-80 | 77-80 | 77-80 |
| Engine model / type | Z 4901 | Z 5901 | Z 6901 |
| Number of cylinders / turbocharging | 3 | 4 | 4 |
| Engine displacement (cm3) | 2696 | 3456 | 3595 |
| Piston dimension / stroke (mm) | 102×110 | 100×110 | 102×110 |
| Maximum engine power (hp) / rpm | 45/2200 | 58/2200 | 65/2200 |
| Torque (Nm) / rpm | 142/1450 | 180/1650 | 205/1500 |
| Number of gears (front + rear) | 10+2 | 10+2 | 10+2 |
| Number of synchronized gears (front+rear) | 4 | 4 | – |
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| Speed-Shift | – | – | – |
| Type of reverse | – | – | – |
| Driving speed (km/h) | 1,1-25,7 | 1,1-24,7 | 1,1-24,7 |
| Max Driving speed (km/h) | 27 | 26 | 26 |
| Hydraulic pump capacity (L/min) | 20 | 20 | 20 |
| 3-Point Hitch control | mech | mech | mech |
| 3-point hitch max load (kg) | 1350 | 1750 | 1750 |
| PTO speed (rpm) | 540/1000 | 540/1000 | 540/1000 |
| Disc brake type (dry / wet) | – | – | – |
| Type of control of the braking system | mech | – | – |
| Turning radius 2WD (m) | – | – | – |
| Turning radius 4WD (m) | – | – | – |
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| Front wheel 2WD | 7,50-16 | 7,50-16 | 7,50-16 |
| Front wheel 4WD | 11,2-24 | 11,2-24 | – |
| Rear wheel 2WD | 12,4-36 | 12,4-36 | 12,4-36 |
| Rear wheel 4WD | 16,9-30 | 16,9-30 | – |
| 2WD total weight (kg) | 2580 | 2950 | 2950 |
| 4WD total weight (kg) | 3380 | 3380 | – |
| Total height with cabin (cm) | – | – | – |
| Total length (cm) | 338 | 372 | 372 |
| Total width (cm) | 198 | 225/226 | 225/226 |
| Fuel tank capacity (l) | 55 | 67 | 67 |
| Cabin sound level (dB) | 87 | 86 | 85,5 |
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