# 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
This offer is for informational purposes only. Please confirm details directly from the seller.
After identifying a vehicle of interest on Truck1.eu, you have the option to reach out to the seller either by using the contact form or by calling the dealer directly using the phone number provided. Choose the method that best aligns with your preferences.
Reach out to the seller to request more information about the vehicle’s availability, technical condition, and actual price, as ads might not always provide complete details. Additionally, ask for any recent service records or inspection reports to get a clearer picture of the vehicle’s current state.
Leverage Truck1’s comparison feature to evaluate similar vehicles. This will help you assess whether the asking price is competitive and aligned with market trends. Look for patterns in pricing and features to make an informed decision.
When purchasing a vehicle online, it's essential to verify the seller's reputation by looking for positive reviews and a history of successful transactions. Truck1’s “Dealer status” icons provide valuable insights based on the experiences with the dealer, aiding in assessing the seller’s reliability.
Whenever possible, make it a priority to visit the seller and inspect the vehicle in person. If feasible, arrange for a third-party pre-purchase inspection of the vehicle. This can uncover potential issues that might not be visible in photos or mentioned in the advert.
Ensure you sign a detailed sale agreement to protect your rights and confirm the terms of the transaction.
Proceed with payment only after signing the sale agreement. A small down payment to reserve the vehicle is common but should be done cautiously.
Confirm the seller's authenticity by gathering detailed information and checking reviews or ratings from previous buyers. Look for dealer icons on Truck1 to identify verified sellers and ensure a safer purchasing experience.
Compare the prices of similar vehicles using the Comparison tool to identify any unusual offers. Be wary of prices that deviate significantly from the market norm, as they may indicate potential issues or fraud.
Ask the seller for details about the vehicle’s history and usage conditions. A genuine seller will be transparent and willing to share this information, helping you assess if the vehicle meets your needs.
Arrange to see and test the vehicle, looking for signs of wear or damage. Consider a pre-purchase inspection by a professional mechanic to uncover any hidden issues and ensure the vehicle's safety and reliability.
Before any transaction, ensure a detailed sale agreement is in place outlining all terms and conditions. Use secure payment methods and verify transaction details to protect against fraud.

This offer is for informational purposes only. Please confirm details directly from the seller.
After identifying a vehicle of interest on Truck1.eu, you have the option to reach out to the seller either by using the contact form or by calling the dealer directly using the phone number provided. Choose the method that best aligns with your preferences.
Reach out to the seller to request more information about the vehicle’s availability, technical condition, and actual price, as ads might not always provide complete details. Additionally, ask for any recent service records or inspection reports to get a clearer picture of the vehicle’s current state.
Leverage Truck1’s comparison feature to evaluate similar vehicles. This will help you assess whether the asking price is competitive and aligned with market trends. Look for patterns in pricing and features to make an informed decision.
When purchasing a vehicle online, it's essential to verify the seller's reputation by looking for positive reviews and a history of successful transactions. Truck1’s “Dealer status” icons provide valuable insights based on the experiences with the dealer, aiding in assessing the seller’s reliability.
Whenever possible, make it a priority to visit the seller and inspect the vehicle in person. If feasible, arrange for a third-party pre-purchase inspection of the vehicle. This can uncover potential issues that might not be visible in photos or mentioned in the advert.
Ensure you sign a detailed sale agreement to protect your rights and confirm the terms of the transaction.
Proceed with payment only after signing the sale agreement. A small down payment to reserve the vehicle is common but should be done cautiously.
Confirm the seller's authenticity by gathering detailed information and checking reviews or ratings from previous buyers. Look for dealer icons on Truck1 to identify verified sellers and ensure a safer purchasing experience.
Compare the prices of similar vehicles using the Comparison tool to identify any unusual offers. Be wary of prices that deviate significantly from the market norm, as they may indicate potential issues or fraud.
Ask the seller for details about the vehicle’s history and usage conditions. A genuine seller will be transparent and willing to share this information, helping you assess if the vehicle meets your needs.
Arrange to see and test the vehicle, looking for signs of wear or damage. Consider a pre-purchase inspection by a professional mechanic to uncover any hidden issues and ensure the vehicle's safety and reliability.
Before any transaction, ensure a detailed sale agreement is in place outlining all terms and conditions. Use secure payment methods and verify transaction details to protect against fraud.

















