Introduction
Zetor 8640 Row-Crop Tractor
The Zetor 8640 is a row-crop tractor produced in Brno, Czech Republic, between 1989 and 1999. Part of the 8620 series, this machine was engineered for general agricultural applications, offering a balance of mechanical simplicity and operational versatility.
Engine and Power
The tractor is powered by the Zetor Z 1201 diesel engine, a 4.2-liter, 4-cylinder unit featuring liquid cooling and direct fuel injection. It delivers a rated power of 82 hp (61.1 kW) at 2200 RPM. The engine utilizes glow plugs for cold-start assistance and is matched with a 12-volt starting system.
Transmission and Drivetrain
The drivetrain features a synchromesh transmission providing 18 forward and 6 reverse gears, utilizing three gears across high, low, and reverse ranges, complemented by a three-speed torque multiplier. Power is transmitted through a 330mm hydraulic dry disc clutch to a 4x4 MWD (Mechanical Wheel Drive) system. Operational control is enhanced by power steering and an electro-hydraulic rear differential lock.
Hydraulics and PTO
The hydraulic system is an open-center type delivering a pump flow of 16 gpm (60.6 lpm) at a pressure of 2600 psi. It includes three valves for implement control. The rear PTO is independent, offering dual speeds of 540/1000 RPM, operated via a wet disc clutch system.
Hitch and Dimensions
The Zetor 8640 is equipped with a Category II rear three-point hitch featuring both position and draft control, capable of lifting up to 9,000 lbs (4,082 kg). The tractor has a wheelbase of 93.5 inches (237 cm) and a base operating weight of 8,430 lbs (3,823 kg). It is fitted with a standard cab, which includes provisions for air conditioning and a two-post ROPS structure.
Conclusion
With its robust mechanical build and standard cab configuration, the Zetor 8640 serves as a capable utility tractor for mid-sized farming operations. Its combination of a high-torque 4-cylinder engine and versatile gear selection makes it suitable for a variety of row-crop and general traction tasks.
Production Information of Zetor, 8640
- Original price was $34,000 in 1999
- Row-Crop tractor
- Built in Brno, Czech Republic
| Manufacturer | Zetor |
|---|
Dimension and Tires Information of Zetor, 8640
| Front tread | 64 to 79.5 inches [162 to 201 cm] |
|---|---|
| Wheelbase | 93.5 inches [237 cm] |
| Weight | 8430 lbs [3823 kg] |
| Height (cab) | 105 inches [266 cm] |
| Length | 156 inches [396 cm] |
| Rear tread | 59 to 71 inches [149 to 180 cm] |
| Ground clearance | 17 inches [43 cm] |
| Width | 76 inches [193 cm] |
| Ag front | 12.4-24 |
|---|---|
| Ag rear | 16.9-38 |
Engine Specifications of Zetor, 8640
- Zetor Z 1201
- Liquid-cooled
- Diesel
- 4-cylinder
| Starter | Electric |
|---|---|
| Displacement | 254 ci [4.2 L] |
| Fuel system | Direct injection |
| Bore/Stroke | 4.134x4.724 inches [105 x 120 mm] |
| Starter volts | 12 |
| Rated RPM | 2200 |
| Pre-heating | Glow plugs |
| Power | 82 hp [61.1 kW] |
Transmission Information of Zetor, 8640
Transmission variants 1
- Three gears in high/low/reverse ranges with a three-speed torque multiplier.
| Type | Synchromesh |
|---|---|
| Gears | 18 forward and 6 reverse |
| Clutch | 330mm hydraulic dry disc |
Mechanical Specs of Zetor, 8640
- Cab standard with available air-conditioning. Two-post ROPS available.
- Hydraulic wet disc brakes
- Power steering
| Drive | 4x4 MWD 4WD |
|---|---|
| Differential lock | Electro-hydraulic rear |
Power Information of Zetor, 8640
| Rear PTO | Independent |
|---|---|
| Clutch | Wet disc |
| Rear PTO Type | 540/1000 (1.375) |
Hydraulics Specifications of Zetor, 8640
| Type | Open center |
|---|---|
| Steering flow | 6.5 gpm [24.6 lpm] |
| Pump flow | 16 gpm [60.6 lpm] |
| Pressure | 2600 psi [179.3 bar] |
| Valves | 3 |
Three-Point Hitch of Zetor, 8640
| Rear Type | II |
|---|---|
| Control | Position and draft control |
| Rear lift | 9000 lbs [4082 kg] |
Electrical System of Zetor, 8640
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Battery CCA | 1150 |
| Charging system | Alternator |
| Charging amps | 55 |
Where it sits
Its power puts it in the 62th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the Zetor 8640 have?
The Zetor 8640 delivers 82 HP.
What years was the Zetor 8640 produced?
The Zetor 8640 was produced in 1989-1999.
What engine does the Zetor 8640 have?
The Zetor 8640 is powered by a Diesel, 4-cylinder engine.
What transmission does the Zetor 8640 use?
The Zetor 8640 uses a Synchromesh transmission.
How much does the Zetor 8640 weigh?
The Zetor 8640 weighs 8430 lbs [3823 kg].
Is the Zetor 8640 4WD?
The Zetor 8640 is available in 4WD.