SINOTRUK HOWO T7H 440

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# SINOTRUK HOWO T7H 440 6×4 Tractor Unit English Specifications

## 1. Basic Chassis Info

- Model: ZZ4257V324HD1B

- Drive Form: 6×4 (1 steering axle, 2 rear driving axles)

- Steering Type: Left-hand drive (RHD optional)

- Gross Combination Weight (GCW): 40,000 kg

- Curb Weight (Tractor Head Only): 8,800 kg

- Max Travel Speed: 110 km/h

- Wheelbase: 3,200 + 1,400 mm

- Front Overhang: 1,520 mm

- Approach Angle / Departure Angle: 16° / 42°

- 5th Wheel Rated Load: 25,000 kg

## 2. High-Roof T7H Cab

- Cab Type: T7H High-roof flat floor sleeper cab

- Suspension: 4-point airbag full floating suspension

- Seating: 2 seats + double wide sleeper bed

- Tilt System: Hydraulic front tilting cab

- Standard Cab Configuration:

- Automatic air conditioner, independent heater

- Air suspension adjustable driver seat

- Multi-function adjustable steering wheel

- Large LCD instrument panel, rear view camera

- Electric heated rearview mirror, central door lock

- Laminated windshield, sun visor, radio & USB charging

- Electrical System: 24V, 2×180Ah batteries, 28V high-power alternator

## 3. Engine System

- Engine Model: MC11.44-40 (MAN technology)

- Structure: In-line 6-cylinder, water-cooled, turbocharged & intercooled diesel

- Displacement: 10.518 L

- Rated Power: 440 HP / 324 kW @ 1,900 rpm

- Max Torque: 2,100 N·m @ 1,000–1,400 rpm

- Emission Standard: Euro 4 / China National IV

- Fuel Tank Capacity: 600 L aluminum alloy fuel tank

## 4. Transmission & Clutch

- Gearbox Model: HW20716ACL Manual transmission

- Gear Layout: 16 forward gears + 2 reverse gears

- Clutch: Φ430 mm single dry plate clutch, hydraulic operation with air booster

## 5. Axles & Suspension

- Front Steering Axle: HF7 disc brake axle, rated load 7,500 kg

- Rear Driving Axles: MCY13 heavy-duty single reduction axle

- Rear Axle Rated Load: 2×18,000 kg

- Final Drive Ratio: 3.7 (optional 3.08 / 4.11)

- Differential Lock: Inter-axle differential lock standard

- Front Suspension: Multi-leaf spring + hydraulic shock absorbers

- Rear Suspension: Heavy-duty balanced leaf spring suspension

- Frame: High-strength U-type reinforced ladder frame

## 6. Steering & Brake System

- Steering Assembly: ZF hydraulic power steering

- Service Brake: Dual-circuit full air disc brake

- Parking Brake: Spring energy brake acting on rear wheels

- Auxiliary Brake: Engine exhaust brake

## 7. Tires & Wheels

- Tire Spec: 12R22.5 tubeless radial tire

- Tire Quantity: 10 main tires + 1 spare tire

- Wheel Rim: 9.0-22.5 aluminum alloy rim

## 8. Overall Dimensions of Tractor Head

- Total Length: 6,820 mm

- Total Width: 2,550 mm

- Total Height (Top of Cab): 3,850 mm

## 9. Core Advantages

1. MC11 MAN technology engine, strong low-speed torque, low fuel consumption for long-distance haulage

2. Air suspension high-roof flat floor cab, superior driving comfort for long trips

3. 16-speed heavy-duty transmission, stable shifting under full load

4. MCY13 high-torque rear axle with optional multiple speed ratios

5. Full disc brake system with exhaust brake, high driving safety

6. Large-capacity fuel tank for long-distance continuous transportation

More information

Year of manufacture: 2025

Warranty: 12 months