Introduction
Zetor 8421: Technical Overview (2004-2007)
The Zetor 8421 is a two-wheel-drive agricultural tractor produced between 2004 and 2007 in Brno, Czech Republic. Part of the 7441 and 8441 series, this model was designed to serve as a reliable utility tractor for general farm operations.
Engine and Power
The tractor is equipped with a 4-cylinder, liquid-cooled, turbocharged diesel engine from Zetor. With a displacement of 4.2 liters (254 ci), the engine delivers a rated power of 84 hp (62.6 kW) at 2200 RPM. The system utilizes a 12-volt starter and is engineered for steady performance in standard agricultural tasks.
Transmission and Drivetrain
The 8421 features a two-wheel-drive configuration and offers two transmission options: a 10-speed syncromesh or a 12-speed mechanical shuttle. Both transmissions incorporate a 304.8 mm hydraulic cerametallic disc clutch to facilitate gear engagement and operational control.
Hydraulics and Hitch
The hydraulic system is an open-center type, providing a total flow of 18 gpm (68.1 lpm) and a pump flow of 14 gpm (53.0 lpm) at a pressure of 2900 psi (200.0 bar). It is equipped with three valves. The rear hitch is a Category II/I type, featuring position and draft control with a maximum lift capacity of 6830 lbs (3098 kg). An independent rear PTO is standard, offering 540/1000 RPM speeds.
Dimensions and Operator Environment
The tractor has a wheelbase of 90 inches (228 cm) and an overall length of 152 inches (386 cm). It weighs 7440 lbs (3374 kg). The operator station features a two-post folding ROPS as standard, with an optional air-conditioned cab available to enhance operator comfort in various weather conditions.
Conclusion
The Zetor 8421 is a straightforward, mechanical-focused tractor suitable for farmers and operators requiring a stable 84 hp machine for standard field work and implement management. Its versatile hitch and hydraulic capacity make it compatible with a wide range of secondary agricultural equipment.
Production Information of Zetor, 8421
- Built in Brno, Czechoslovakia
| Manufacturer | Zetor |
|---|
Dimension and Tires Information of Zetor, 8421
| Ground clearance | 22 inches [55 cm] |
|---|---|
| Wheelbase | 90 inches [228 cm] |
| Height (cab) | 102 inches [259 cm] |
| Height (ROPS) | 103 inches [261 cm] |
| Length | 152 inches [386 cm] |
| Front tread | 56 to 71 inches [142 to 180 cm] |
| Weight | 7440 lbs [3374 kg] |
| Width | 73 inches [185 cm] |
| Rear tread | 56 to 71 inches [142 to 180 cm] |
| Ag front | 9.00-16 |
|---|---|
| Ag rear | 16.9-34 |
Engine Specifications of Zetor, 8421
- Zetor
- Liquid-cooled
- Turbocharged diesel
- 4-cylinder
| Rated RPM | 2200 |
|---|---|
| Displacement | 254 ci [4.2 L] |
| Starter volts | 12 |
| Power | 84 hp [62.6 kW] |
Transmission Information of Zetor, 8421
Transmission variants 1
| Type | Syncromesh |
|---|---|
| Gears | 10 forward and 2 reverse |
| Clutch | 304.8mm hydraulic cerametallic disc |
Transmission variants 2
| Type | Mechanical shuttle |
|---|---|
| Gears | 12 forward and reverse |
| Clutch | 304.8mm hydraulic cerametallic disc |
- 10-speed syncromesh
- 12-speed mechanical shuttle
Mechanical Specs of Zetor, 8421
- Two-wheel drive
- Two-post folding ROPS. Cab optional with air-conditioning.
Power Information of Zetor, 8421
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540/1000 |
Hydraulics Specifications of Zetor, 8421
| Type | Open center |
|---|---|
| Total flow | 18 gpm [68.1 lpm] |
| Pump flow | 14 gpm [53.0 lpm] |
| Pressure | 2900 psi [200.0 bar] |
| Valves | 3 |
Three-Point Hitch of Zetor, 8421
| Rear Type | II/I |
|---|---|
| Control | Position and draft control |
| Rear lift | 6830 lbs [3098 kg] |
Where it sits
With 84 HP, the Zetor 8421 sits just above 7441 (75 HP) in Zetor's range. Its power puts it in the 55th percentile of 2000s models in our database (2822 machines).
Frequently asked questions
How much horsepower does the Zetor 8421 have?
The Zetor 8421 delivers 84 HP.
What years was the Zetor 8421 produced?
The Zetor 8421 was produced in 2004-2007.
What engine does the Zetor 8421 have?
The Zetor 8421 is powered by a Turbocharged diesel, 4-cylinder engine.
What transmission does the Zetor 8421 use?
The Zetor 8421 uses a Syncromesh transmission.
How much does the Zetor 8421 weigh?
The Zetor 8421 weighs 7440 lbs [3374 kg].
Is the Zetor 8421 4WD?
The Zetor 8421 is available in 2WD.