| Manufacturer | Zetor |
| Price | - |
| Model | 7421 |
| Equipment Type | - |
| Factory | Brno, Czechoslovakia |
ZETOR 7421 POWER
| Engine | 75hp / 55.9kW |
| PTO (claimed) | 70hp / 52.2kW |
ENGINE DETAIL
The Zetor 7421 features a turbocharged 4-cylinder diesel engine with a displacement of 4.2L, generating 75 hp at a rated RPM of 2200, providing sufficient power for medium duty agricultural tasks. Its 12-volt starting system is standard, ensuring reliable engine turnover in various operational conditions. While the turbocharger enhances efficiency and torque, potential challenges could include increased maintenance demands on the turbo system and complexity in diagnostic procedures.
| Description | Zetor turbocharged diesel 4-cylinder liquid-cooled |
| Displacement | 254ci / 4.2L |
| Power | 75hp / 55.9kW |
| Rated RPM | 2200 |
| Starter volts | 12 |
ZETOR 7421 ENGINE
The Zetor 7421 features a robust Zetor 4.2L 4-cylinder diesel engine, offering reliable power for various agricultural tasks. Its dual fuel tank system—20 gallons for ROPS and 32 gallons for the cab—provides enhanced operational runtime, reducing the frequency of refuels on larger farms. However, consider the weight distribution and potential for increased operating costs due to dual fuel setups in smaller-scale operations.
| Description | Zetor 4.2L 4-cyl diesel |
| ROPS Fuel tank | 20gal / 75.7L |
| Cab Fuel tank | 32gal / 121.1L |
TRANSMISSIONS OVERVIEW
The Zetor 7421 features a 10-speed synchromesh gearbox, ensuring smooth and precise shifting, ideal for varied field applications. The 12-speed mechanical shuttle enhances maneuverability, allowing efficient forward and reverse transitions—beneficial in tight spaces. However, operators should be aware that the syncromesh system may require more maintenance compared to non-synchronized gearboxes, particularly in harsh conditions.
| Description | 10-speed syncromesh 12-speed mechanical shuttle |
TRANSMISSION 1
The Zetor 7421 features a syncromesh transmission with 10 forward and 2 reverse gears, allowing for smoother gear transitions and improved control during varied applications. The 304.8mm hydraulic cerametallic disc clutch offers enhanced durability and efficient power transfer, making it suitable for heavy-duty tasks. However, potential challenges include the need for periodic maintenance of the clutch and transmission system to ensure optimal performance and longevity.
| 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 7421 tractor features a mechanical shuttle transmission, providing 12 forward and reverse gears, which enhances operational flexibility for various tasks in agriculture. The 304.8mm hydraulic cerametallic disc clutch offers durability under heavy load, ideal for demanding applications, yet it may require careful modulation to prevent overheating during extended use. This tractor is well-suited for farmers needing reliable performance in both tillage and transport operations.
| 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 7421 features a 4x2 2WD chassis, offering lower initial costs and simplified maintenance, though it may struggle in traction on uneven terrain compared to 4WD models. Its optional air-conditioned cab enhances operator comfort for prolonged use, while the 10-speed syncromesh and 12-speed mechanical shuttle transmissions provide versatile speed control, optimizing performance for various agricultural tasks. However, the absence of 4WD limits its effectiveness in muddy or hilly conditions, making it best suited for flat, well-maintained fields.
| Chassis | 4x2 2WD |
| Cab | Two-post folding ROPS. Cab optional with air-conditioning |
| 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 7421 TIRES
The Zetor 7421 tractor is equipped with agricultural tires measuring 9.00-16 at the front and 16.9-30 at the rear, facilitating improved traction and stability in fieldwork. Advantages include enhanced load-bearing capacity and better grip on varied terrain, beneficial for medium to large farming operations. However, challenges may arise in tight spaces due to its larger wheelbase, potentially limiting maneuverability in smaller fields or gardens.
| Ag front | 9.00-16 |
| Ag rear | 16.9-30 |
DIMENSIONS
| Wheelbase | 90inches / 228cm |
| Length | 152inches / 386cm |
| Width | 73inches / 185cm |
| Height (ROPS) | 103inches / 261cm |
| Height (cab) | 102inches / 259cm |
| Weight | 7310lbs / 3315kg |
| Ground clearance | 22inches / 55cm |
| Front tread | 56 to 71inches / 142to 180cm |
| Rear tread | 56 to 71inches / 142to 180cm |
DIMENSIONS & TIRES
The Zetor 7421's 90-inch wheelbase provides stability and maneuverability, making it suitable for various field applications. With a weight of 7310 lbs, it offers good traction, particularly with the large rear tires (16.9-30), ideal for plowing and heavy tillage. However, the relatively narrow front tires (9.00-16) may limit flotation on softer soils, necessitating careful operation in muddy conditions.
| Wheelbase | 90inches / 228cm |
| Weight | 7310lbs / 3315kg |
| Front tire | 9.00-16 |
| Rear tire | 16.9-30 |
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 |