HOWO NX 6×4 Tractor Truck

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Model

ZZ4257N324GB1
Horsepower

371HP
Engine

WD615.47
Transmission

HW19710

overview

The SINOTRUK HOWO NX 6×4 Tractor Truck with 371HP is a heavy-duty tractor unit designed for reliable long-haul and regional transport. It is part of the HOWO NX/HOHAN series, which focuses on cost-effectiveness, comfort, and adaptability to various road conditions, particularly in markets like Africa.

The HOWO NX 6×4 is powered by the proven WEICHAI WD615.47 engine rated at 371HP, delivering strong torque for heavy loads . It is paired with the robust HW19710 10-speed manual transmission, known for its reliability and smooth power delivery in demanding conditions . The rear axle features a hub reduction design with differential locks, enhancing traction and durability on rough terrain .

Cab & Comfort

The H77L cab prioritizes driver comfort with a four-point suspended suspension system, an air-suspension driver’s seat with lumbar support, and a single sleeper berth—ideal for long-distance driving . It also includes air conditioning, electric rearview mirrors with heating, and a layout designed for practical storage .

Specifications

HOWO NX 6×4 TRACTOR TRUCK
Production Year	2026, new truck.
Cabin	H77L cab. with one sleeper and two seats, with Air Conditioner, 2-arm windscreen wiper system with three speeds, damped adjustable driver’s seat, with heating and ventilating system, exterior sun visor, safety belts, adjustable steering wheel, air horn, with transverse stabilizer,with 4-point support fully floating suspension + shock absorber. High Position Steel Bumper
Engine	Diesel 4-stroke direct injection diesel engine Engine model: WD615.47 ,371HP 6-cylinder in-line with water cooling, turbo-charging and intercooling
Transmission	HW19710, 10F & 2R. Ratio: 14.28, 10.62, 7.87, 5.88, 4.38, 3.27, 2.43, 1.80, 1.34, 1.00, 13.91(R1), 3.18(R2)
Steering	ZF power steering, model ZF8118, hydraulic steering with power assistance
Front Axle	VGD95, 1*9500 KGS Steering with double T-cross section beam
Rear Axle	MCP16ZG, 2*16000KGS Pressed axle housing, central Single reduction with hub reduction and with differential locks between wheels and axles.
Propeller Shaft	Double universal joint propeller shaft with gear-shaped coupling flange
Chassis	Front suspension: 10 semi-elliptic leaf spring, hydraulic telescopic double-action shock absorbers and stabilizer Rear suspension: 12 leaf semi-elliptic springs, bogie spring and stabilizer
Brake	Service brake: dual circuit compressed air brake Parking brake (emergency brake): spring energy, compressed air operating on front shaft and rear wheels Auxiliary brake: engine exhaust brake

Safety & Durability

The chassis features a reinforced double-deck frame and heavy-duty multi-leaf springs (10-leaf front, 12-leaf rear), ensuring durability on rough roads . Safety features include dual-circuit compressed air brakes, an engine exhaust brake, and a spring-energy parking brake.

This tractor is widely used for towing trailers to transport goods, and it is particularly popular in regions like Africa due to its fuel adaptability and readily available spare parts .

Interior

Excellent Ergonomic Design

All controls, instrument panels, and displays are intuitively arranged for easy access and quick information retrieval, minimizing distractions and maximizing driver focus. The pneumatically controlled steering wheel is fully adjustable for both height and angle.
High Comfort

Featuring an adjustable air suspension seat, the HOWO-TX offers multi-directional electric adjustment and lumbar support, allowing drivers to personalize their seating for optimal comfort. Crafted from high-quality, breathable materials, the seat effectively reduces fatigue during long drives.
All-Around Vision, Everything in Sight

Featuring wide-view design, four-way monitoring system (optional), and observation window (optional), the driver is accessible to comprehensive visual information about the surrounding environment and traffic dynamics of the vehicle, thus making accurate assessments, and safely responding to various situations.
Strong Power, Efficient and Reliable

Meticulous design and optimization of the HOWO-TX powertrain, combined with careful component matching and integration, delivers seamless power transmission, maximized efficiency, enhanced vehicle performance, and significantly reduced fuel and maintenance expenses.