| Manufacturer | Zetor |
| Price | - |
| Model | 8421 |
| Equipment Type | - |
| Factory | Brno, Czechoslovakia |
ZETOR 8421 POWER
| Engine | 84hp / 62.6kW |
| PTO (claimed) | 78hp / 58.2kW |
ENGINE DETAIL
The Zetor 8421's turbocharged 4-cylinder diesel engine provides a balance of power and efficiency, delivering 84 hp at a rated 2200 RPM, ideal for moderate agricultural tasks and some light industrial work. Its 4.2L displacement allows for effective torque delivery, making it suitable for varied implements like plows and cultivators. However, users should consider the 12V starter system's reliability in colder climates, as insufficient cranking power can impact performance during winter operations.
| Description | Zetor turbocharged diesel 4-cylinder liquid-cooled |
| Displacement | 254ci / 4.2L |
| Power | 84hp / 62.6kW |
| Rated RPM | 2200 |
| Starter volts | 12 |
ZETOR 8421 ENGINE
The Zetor 8421 is equipped with a robust 4.2L 4-cylinder diesel engine, which provides efficient power delivery suitable for various agricultural tasks, ensuring reliability and longevity. With a total fuel capacity of 52 gallons (197.1L), it allows for extended operation without frequent refueling, making it advantageous for large-scale farming operations. However, consider the weight and maneuverability implications of a heavier fuel load in constrained environments.
| Description | Zetor 4.2L 4-cyl diesel |
| ROPS Fuel tank | 20gal / 75.7L |
| Cab Fuel tank | 32gal / 121.1L |
TRANSMISSIONS OVERVIEW
The Zetor 8421 features a 10-speed syncromesh transmission that enables smooth gear transitions, ideal for various field applications. Its 12-speed mechanical shuttle allows for efficient forward-reverse gear shifts, enhancing productivity in tasks requiring frequent directional changes. This combination offers a balance between operational efficiency and ease of use, but may require familiarity for operators transitioning from non-syncromesh systems.
| Description | 10-speed syncromesh 12-speed mechanical shuttle |
TRANSMISSION 1
The Zetor 8421 tractor features a syncromesh transmission system with 10 forward and 2 reverse gears, supporting seamless gear shifts essential for varied operational conditions. Its 304.8mm hydraulic cerametallic clutch provides durability and effective power transfer, enhancing performance in heavy tasks like plowing or hauling. However, the complexity of the syncromesh system could lead to increased maintenance needs compared to simpler gearbox designs.
| Type | syncromesh |
| Gears | 10 forward and 2 reverse |
| Clutch | 304.8mm hydraulic cerametallic disc |
SPEEDS 1
| Description | With 16.9-34 rear tires |
TRANSMISSION 2
The Zetor 8421 features a reliable mechanical shuttle for seamless direction changes, enhancing operational efficiency during fieldwork. With a comprehensive 12 forward and reverse gears, it offers versatile speed control, ideal for varied agricultural tasks. The robust 304.8mm hydraulic cerametallic clutch ensures durability under heavy loads, but may require meticulous maintenance to preserve performance in intensive use scenarios.
| Type | mechanical shuttle |
| Gears | 12 forward and reverse |
| Clutch | 304.8mm hydraulic cerametallic disc |
SPEEDS 2
| Description | With 16.9-34 rear tires. Reverse speeds are 10% faster than forward |
MECHANICAL
The Zetor 8421 features a 4x2 two-wheel drive (2WD) chassis, which is ideal for lighter agricultural tasks on flat terrains but may struggle with traction in adverse conditions. Its optional air-conditioned cab enhances operator comfort, making it suitable for extended use during hot weather. The tractor's 10-speed syncromesh and 12-speed mechanical shuttle transmissions provide versatile speed control, beneficial for both transporting materials and precise fieldwork.
| Chassis | 4x2 2WD |
| Cab | Two-post folding ROPS. Cab optional with air-conditionin |
| Transmissions | 10-speed syncromesh 12-speed mechanical shuttle |
HYDRAULICS
| Type | open center |
| Pressure | 2900psi / 200.0bar |
| Valves | 3 |
| Pump flow | 14gpm / 53.0lpm |
| Total flow | 18gpm / 68.1lpm |
TRACTOR HITCH
| Rear Type | II/I |
| Control | position and draft control |
| Rear lift | 6830lbs / 3098kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/1000 |
ZETOR 8421 TIRES
The Zetor 8421 tractor features a robust tire configuration with front tires sized 9.00-16 and rear tires at 16.9-34, which enhances traction and stability in various agricultural applications. This dual tire setup is advantageous for maximizing ground contact, ideal for tasks like plowing and harrowing on uneven terrain. However, the larger rear tires may limit maneuverability in tight spaces, making it less suited for smaller fields or highly cultivated areas.
| Ag front | 9.00-16 |
| Ag rear | 16.9-34 |
DIMENSIONS
| Wheelbase | 90inches / 228cm |
| Length | 152inches / 386cm |
| Width | 73inches / 185cm |
| Height (ROPS) | 103inches / 261cm |
| Height (cab) | 102inches / 259cm |
| Weight | 7440lbs / 3374kg |
| Ground clearance | 22inches / 55cm |
| Front tread | 56 to 71inches / 142to 180cm |
| Rear tread | 56 to 71inches / 142to 180cm |
DIMENSIONS & TIRES
The Zetor 8421 features a 90-inch (228 cm) wheelbase, offering stability and maneuverability, particularly in tight agricultural settings. Weighing 7,440 lbs (3,374 kg), it provides sufficient traction for heavy-duty tasks while potentially requiring more powerful implements due to its weight class. Its tire configuration, with 9.00-16 front and 16.9-34 rear tires, enhances flotation and traction, making it suitable for diverse terrains, though larger rear tires could pose challenges in tight turning radii.
| Wheelbase | 90inches / 228cm |
| Weight | 7440lbs / 3374kg |
| Front tire | 9.00-16 |
| Rear tire | 16.9-34 |
ZETOR 102H LOADER
| Loader weight | 2100lbs / 952kg |
| Height (to pin) | 122inches / 309cm |
| Clearance, dumped bucket | 98inches / 248cm |
| Dump reach | 38inches / 96cm |
| Dump angle | 40° |
| Reach at ground | 73inches / 185cm |
| Rollback angle | 20° |
| Breakout force (at pin) | 5320lbs / 2413kg |
| Breakout force (at 800mm) | 2860lbs / 1297kg |
| Lift to full height (at pin) | 3930lbs / 1782kg |
| Lift to full height (at 800mm) | 2030lbs / 920kg |
| Bucket width | 73inches / 185cm |
| Raise time to height | 4 s |
| Bucket dump time | 3 s |
| Rollback time | 3.5 s |
ZETOR 102SLX LOADER
| Loader weight | 2300lbs / 1043kg |
| Height (to pin) | 127inches / 322cm |
| Clearance, dumped bucket | 91inches / 231cm |
| Dump reach | 20inches / 50cm |
| Dump angle | 60° |
| Reach at ground | 83inches / 210cm |
| Rollback angle | 40° |
| Breakout force (at pin) | 5960lbs / 2703kg |
| Breakout force (at 800mm) | 4280lbs / 1941kg |
| Lift to full height (at pin) | 4670lbs / 2118kg |
| Lift to full height (at 800mm) | 2500lbs / 1134kg |
| Bucket width | 73inches / 185cm |
| Raise time to height | 5.2 s |
| Bucket dump time | 2.5 s |
| Rollback time | 2 s |
ZETOR 112SLX LOADER
| Loader weight | 2450lbs / 1111kg |
| Height (to pin) | 137inches / 347cm |
| Clearance, dumped bucket | 107inches / 271cm |
| Dump reach | 34inches / 86cm |
| Dump angle | 60° |
| Reach at ground | 90inches / 228cm |
| Rollback angle | 40° |
| Breakout force (at pin) | 5180lbs / 2349kg |
| Breakout force (at 800mm) | 3590lbs / 1628kg |
| Lift to full height (at pin) | 3270lbs / 1483kg |
| Lift to full height (at 800mm) | 2120lbs / 961kg |
| Bucket width | 73inches / 185cm |
| Raise time to height | 5.6 s |
| Bucket dump time | 2.5 s |
| Rollback time | 2 s |