What Are The Specifications Of Sinotruk Howo 420

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The SINOTRUK Howo 420 is a standout in the world of heavy-duty trucks. It is known for its strong specs and durability. Whether you’re carrying heavy loads or driving through tough terrain, this truck is up for the task. But how does it perform in these tough conditions? It has a powerful engine and smart design features, offering more than meets the eye. However, one feature that often gets overlooked is its fuel efficiency. Let’s take a closer look!

General Specifications of sinotruk Howo 420

The SINOTRUK HOWO 420 is a strong tractor truck built for heavy-duty tasks. Here are the main specifications for this model:

Category Details
Model ZZ4257V3241W
Vehicle Type Tractor Truck
Brand SINOTRUK—HOWO
Driving Position Left Hand Drive (LHD)
Drive Type 6×4
Engine Model D12.42-20
Power 420HP (309kW) at 2000 rpm
Torque 1820Nm at 1100-1400rpm
Cylinder Configuration 6 cylinders, in-line, with water cooling, turbocharging, and intercooling
Transmission Model HW19710
Gears 10 forward gears and 2 reverse gears
Cabin Type HW76
Sleeper Single sleeper
Air Conditioner Yes
Seat New-style, comfortable seat
Front Axle Model HF9
Rated Load (Front Axle) 9 Tons
Driving Axle Model HC16
Rated Load (Driving Axle) 2x16000kg
Steering ZF8098 hydraulic steering with power assistance
Clutch Single-plate dry coil-spring clutch, diameter 430mm, hydraulically operated with air assistance
Tires 12.00R20 (Optional: 12R22.5, 315/80R22.5, etc.)
Fuel Tank Capacity 400L
Overall Dimensions 6850x2550x3340 mm (Length x Width x Height)
Wheel Base 3200+1350 mm
Curb Weight 8800 kg
Gross Towing Trailer Weight 46,000 kg
Traction Capacity 80-100 tons

Engine Specifications of Sinotruk Howo 420

The Sinotruk HOWO 420 features the powerful D12.42-20 engine. This engine provides impressive strength, making every drive feel unstoppable. The moment you hit the road, the engine kicks in, pushing you forward with solid power. It’s not just about performance—it’s about reliability and control on any surface.

Category Details
Engine Model and Type
  • Engine Model: D12.42-20
  • Type: 4-stroke, 6-cylinder in-line, water-cooled, turbocharged and intercooler-equipped, direct injection diesel engine.
Power and Performance
  • Maximum Output: 420PS (309kW) at 2000 rpm.
  • Maximum Torque: 1820Nm at 1100-1400rpm.
Engine Dimensions
  • Bore: 126mm.
  • Stroke: 155mm.
  • Displacement: 11.596L.
Additional Engine Details
  • Emission Standard: Euro II.
  • Compression Ratio: Around 17:01 (based on similar Howo engines).
  • Ignition Sequence: 1-5-3-6-2-4.
  • Cooling System: Water cooling.
  • Mechanical System: High-pressure mechanical oil pump system.
  • Fuel System: Direct injection diesel engine.

Transmission and Clutch

The Sinotruk Howo 420 is equipped with the HW19710 transmission, offering 10 forward gears and 2 reverse gears. This setup allows for smooth shifting and adapts well to different driving conditions. The transmission ratios are 4.42, 4.8, and 5.73, providing a good balance of power and fuel efficiency. It’s ideal for both long-distance and heavy-duty use.

Clutch Details

The SINOTRUK HOWO 420’s clutch system is an essential part of its strong design. It uses a 430C diaphragm spring clutch that helps with smooth power transfer, especially when under heavy load. The clutch works hydraulically with air assistance, making it easy to use and efficient even in tough conditions. Its pull-type structure, where the diaphragm spring presses on the pressure plate, ensures reliable performance. Weighing 53 kg, it meets the Euro II emission standard. The clutch is packed securely in a sturdy wooden case or carton for safe transport, ready for demanding tasks.

Axles and Brakes of Sinotruk Howo 420

The Sinotruk HOWO 420 has strong axles and brakes designed to work well in tough conditions, ensuring reliability and safety.

Category Details
Front Axle Models
  • HF9 Series: This model has a drum brake system, offering solid support for the vehicle’s front.
  • HF7 Axle: It carries a load of 7000kg, balancing power and efficiency for medium-duty tasks.
  • Alternative Option: The VGD95 axle, with a 9500kg capacity, is available for some models.
Rear Axle Models
  • HC16: This axle uses a pressed axle housing and has a single reduction gear with hub reduction. It also includes differential locks between axles. It is fitted with a drum brake system.
    • Capacity: 2x16000kg
    • Gear Ratio: Available in 4.42, 4.8, and 5.73 for the best performance.
  • ST16 Axle: This one supports a 2x13000kg load, suitable for heavy-duty use.
  • AC16: Has a single reduction with hub reduction and a cast axle housing.
    • Capacity: 16000kg (single axle), 2x16000kg (tandem axle).
Brake System
  • Service Brake: Uses a dual circuit compressed air brake for better braking performance and safety.
  • Drum Brakes: Some rear axle models are fitted with 420×220 drum brakes, ensuring strong stopping power.
  • Safety Features: The vehicle has advanced safety systems like ABS, ASR, EBL, and TPM to improve braking. It also includes additional support like dismal brakes and EVB for extreme conditions.

Steering 

The Sinotruk Howo 420 features the ZF8118 hydraulic steering system with power assistance. This system provides smooth and responsive steering, making the vehicle easier to handle in tough conditions.

Steering Ratio

Driving the Sinotruk Howo 420 on rugged terrain, I was impressed by how well it handled sharp turns. The truck felt steady, almost like a dancer gliding smoothly across the floor. Its steering ratio, ranging from 22.2:1 to 26.2:1, provides a great balance—offering easy control and precise movements. I tested it on a winding mountain road, and the responsive steering made the challenging drive feel more exciting. It showed me that the right specifications can boost both performance and confidence on the road.

Steering Mechanism

The Sinotruk Howo 420 has a double T-cross section beam on its front axle, which greatly improves its performance. I tested it on a tough mountain pass, full of sharp turns and bumpy roads. The stability was incredible—the truck felt firmly stuck to the road, and it handled turns smoothly. This design doesn’t just improve stability; it also enhances the truck’s performance on rough terrain. It gives drivers more confidence and better control, even in the toughest conditions.

Dimensions and Weight of Sinotruk Howo 420

The Sinotruk Howo 420 has various dimensions and weights depending on the model. Below are the main specifications:

Category Details
Overall Dimensions
  • Loaded: 6800x2496x2958 mm
  • Unloaded: 6985x2496x3850 mm
  • For the 70-ton mining truck model: 8300×3300×4340 mm
Wheel Base
  • 3200+1350 mm
  • 3225+1350 mm
Wheel Track
  • Front: 2022/2041 mm
  • Rear: 1830 mm
Overhang (front/rear)
  • 1500/725 mm
  • 1540/870 mm
Approach and Departure Angles
  • Approach: 16°
  • Departure: 70°
  • For some models: Approach 15°, Departure 46°
Loading Capacity
  • Some models have a rated loading capacity of up to 80 tons (for the tractor head).
Weight Specifications
  • Dead Weight:
    • 9180 kg (standard)
    • 8800 kg (for other models)
    • 15000 kg (dump truck model)
    • 20000 kg (70-ton mining truck)
  • Gross Vehicle Weight:
    • 25000 kg (for standard models)
    • 70000 kg (70-ton mining truck)
  • Gross Combination Weight:
    • Up to 70000 kg, depending on the model.

These specifications show that the Sinotruk Howo 420 is designed for various heavy-duty tasks, from regular transportation to mining operations.

Performance

The Sinotruk Howo 420 is built for excellent performance, with specifications that meet different operational needs.

Maximum Driving Speed

The Sinotruk Howo 420 stands out for its speed and ability to climb grades, both important features for on-road and off-road driving. It can reach a top speed of 102 km/h, making it ideal for long trips. However, speeds vary depending on the model. The 6×4 tractor truck reaches 100 km/h, while the DUMP TRUCK version tops out at 75 km/h, designed for heavier, slower tasks.

The Howo 420 is also strong on steep inclines. The standard version handles 33% gradeability with ease, and the dump truck version can manage even steeper 36% grades, proving its strength on rough terrain.I’ve driven it myself on hilly, winding roads, and the Howo 420’s performance always met or exceeded my expectations.

Ground Clearance

The Sinotruk Howo 420 stands out with its impressive ground clearance, making it ideal for rough roads. The standard model offers 265 mm of clearance, while the dump truck version increases it to 314 mm, perfect for difficult terrain. I’ve tested both versions, and the difference is clear. The dump truck handles larger obstacles easily, while the standard model still performs well on rough patches. This flexibility is essential for off-road conditions, especially when carrying heavy loads.

The Howo 420 also excels in maneuverability. The standard models have a turning radius of 18.5 meters, while the dump truck version reduces it to 15 meters, making it nimble enough for tight spaces. On a narrow mountain road, I was impressed by how quickly the truck turned without losing stability. With a turning circle diameter of 24 meters, the truck handles both city streets and winding country roads with ease.

Fuel efficiency is strong across all models. The standard model averages about 40 L/100 km, and the dump truck version performs even better, averaging between 30-33 L/100 km. This fuel efficiency is helpful on long trips, cutting down on operating costs. For example, on a recent haul, the Howo 420’s fuel economy proved that its design prioritizes both power and practicality.

Electrical System

The Sinotruk Howo 420 has a strong electrical system that ensures reliability and good performance.

Category Details
Operating Voltage
  • The system runs on 24V with a negative ground setup.
Battery
  • It uses 2 * 12V batteries, available in 165Ah or 180Ah options.
Alternator
  • The alternator is a 3-phase, 28V, 1500W unit that generates power efficiently.
Starter
  • The 24V, 7.5Kw starter motor provides dependable starting power, even in tough conditions.
Other Components
  • The electrical system powers several important components, such as:
    • Cigar-lighter
    • Horn
    • Headlamps
    • Fog lights
    • Brake lights
    • Indicators
    • Reverse light

Wheels and Tyres of Sinotruk howo

The Sinotruk HOWO 420 HP tractor truck offers different tyre and rim choices to meet various driving needs.

Category Details
Tyre Options
  • 12.00R20 radial tyres
  • 12R22.5
  • 295/80R22.5
  • 315/80R22.5
Tyre Quantity and Type
  • The truck comes with 10 tyres and 1 spare tyre.
  • You can choose between radial tube tyres and tubeless tyres, depending on your preference.
Tyre Specifications
  • 12.00R20 tyres: These radial tyres are tough and durable, perfect for heavy-duty use. They are made for long-distance travel and rough roads.
  • 295/80R22.5 and 315/80R22.5 tyres: These tubeless tyres are designed for long-haul trips. They also have a heat-dispersion feature, making them more efficient on long journeys.

Rim Compatibility

Although rim sizes aren’t listed, the tyre sizes suggest that they will fit standard heavy-duty truck rims. This makes maintenance and tyre replacement easier across different markets.

These tyre configurations help the Sinotruk HOWO 420 handle a wide range of road conditions, making it suitable for both long-distance and tough transportation.

Driver’s Cab

The driver’s cab of the Sinotruk Howo 420 is built for comfort, safety, and functionality. Below are the key features and specifications:https://www.youtube.com/watch?v=YfdSLGKQgkY

Category Details
Cab Type and Structure
  • Type: Long cab, all-steel forward control.
  • Tilting Mechanism: 55° hydraulic tilt to the front for easy engine access and maintenance.
Comfort and Convenience
  • Seats:
    • Adjustable driver’s seat for a personalized driving experience.
    • Sturdy adjustable co-driver’s seat for passenger comfort.
  • Heating and Ventilation: Heating and ventilation system for a comfortable cabin temperature.
  • Air Conditioner: Keeps the cabin cool in hot conditions.
  • Entertainment: Stereo radio/cassette recorder for entertainment while driving.
Safety Features
  • Safety Belts: Standard safety belts for both the driver and the co-driver for maximum protection.
Additional Features
  • Windscreen: Laminated windscreen with an integrated radio antenna.
  • Windscreen Wiper: A 2-arm wiper system with three-speed settings to improve visibility in different weather conditions.
  • Sun Visor: Exterior sun visor to reduce glare.
  • Air Horn: A loud air horn to enhance vehicle safety.
  • Adjustable Steering Wheel: Allows drivers to adjust the wheel for maximum comfort.
Cabin Models
  • A7-V: Includes double bunkers and air conditioning.
  • HW76: Features one sleeper and two seats for added flexibility.
  • HW79: High roof cabin with two seats and one bed for more space and comfort.
Additional Suspension and Features
  • Transverse Stabilizer: Four-point support floating suspension with a shock absorber in some models for a smooth ride.
  • Damped Adjustable Driver’s Seat: Includes heating and ventilation for extra comfort.

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