Tracteur routier Sinotruk Howo T7H 440

# 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