STQ4257L04Y2N6 Diesel Tractor truck – Full Product Details

Introduction

The STQ4257L04Y2N6 is a high-performance diesel tractor truck, manufactured by Hubei Tri-Ring Motor Co., Ltd. Designed for reliability, efficiency, and heavy-duty operations, this semi-truck combines robust mechanical engineering with superior comfort and safety features. Its durable chassis, powerful engine, and ergonomic cabin make it suitable for long-haul transport, industrial material handling, and container logistics.

Powered by the Weichai WP12.420E32 engine, delivering 309 kW at 2200 rpm and 1750 N·m of torque at 1300–1400 rpm, this tractor unit provides excellent acceleration, high gradeability, and dependable performance under full load conditions. The 12-speed manual gearbox from Shaanxi Fast Gear Co., Ltd. ensures precise power transfer and reliable operation in challenging terrains.

The T380A semi-high roof cabin (2.5 m wide) features laminated double-glass windows, air conditioning, heating, electric windows, central lock, sunshades, and semi-floating suspension, providing a safe and comfortable driving environment for extended trips.

This diesel tractor truck is suitable for multiple applications, including long-distance freight, port operations, industrial material transport, and heavy-load logistics. Its robust design and advanced features make it a dependable choice for demanding trucking operations.

Specifications / Product Parameters

Features

• Robust diesel engine delivering high torque and stable performance for heavy-duty hauling

• Semi-high roof cabin with ergonomic layout and climate control for driver comfort

• Durable chassis and suspension system designed for long-term reliability

• Advanced braking system with ABS and dual-circuit air brakes for safety

• Heavy-duty tires and steering system ensure precise handling under load

Advantages

• High payload and gradeability suitable for industrial and long-haul transport

• Diesel engine provides consistent power with proven reliability

• Reduced maintenance costs with durable engine and drivetrain components

• Comfortable cabin minimizes driver fatigue on long trips

• Compatible with standard trailers as a semi-truck or tractor unit

Applications

• Long-distance freight transportation

• Industrial and construction material transport

• Port and container logistics

• Heavy-duty urban and intercity logistics using tractor trucks

Driving & Performance

The Weichai WP12.420E32 engine provides smooth and responsive power delivery, even under full load. The 12-speed manual transmission allows optimal torque distribution for various terrains, while the 6×4 configuration ensures excellent traction. With a turning radius of 8 meters and a maximum gradeability of 30%, this tractor unit is versatile for both city and highway operations.

Maintenance & Reliability

The diesel drivetrain is engineered for long-term durability. Routine checks include tires, brakes, suspension, and engine inspections. The semi-elliptical leaf spring suspension and ladder-type frame contribute to the vehicle’s longevity and reduce overall maintenance costs.

Safety & Comfort

• ABS anti-lock braking system

• Dual-circuit air brakes and spring parking brakes

• Hydraulic power steering

• Laminated glass cabin with semi-floating suspension

• Air conditioning and heating for driver comfort

FAQ

1. What is the maximum payload?
   Front axle: 9,000 kg; Rear axle: 16,000 kg.

2. Is it compatible with standard trailers?
   Yes, suitable for container and flatbed trailers as a tractor unit.

3. What is the turning radius?
   8 meters, allowing good maneuverability in ports and urban areas.

4. What is the maximum speed?
   89 km/h.

5. What type of engine does it use?
   Weichai WP12.420E32, Euro III standard, 11.6L, 309 kW.

6. What transmission does it have?
   Shaanxi Fast Gear 12-speed manual.

7. What safety systems are included?
   ABS, dual-circuit air brakes, spring parking brakes.

8. Is the cabin suitable for long-distance trips?
   Yes, semi-high roof, semi-floating suspension, climate control, and ergonomic design ensure comfort.

9. What tires are equipped?
   12R22.5 steel cord tires, 10+1 quantity.

10. Where is the spare tire located?
    Mounted at the rear of the vehicle frame.