China brand DF Semi Tractor Trailer 6×4 heavy-duty Tractor Head for Sale
6x4 | 640HP | Euro 6 | Semi with beds | 1 year
$ 73,650.00 ~ $ 95,600.00
What is a Tractor unit?
A tractor unit, also known as a truck unit, lorry unit, power unit, prime mover, ten-wheeler, semi-tractor, semi-truck, semi-lorry, big rig tractor, big rig truck or big rig lorry or simply a tractor, truck, lorry, semi, big rig or rig, is a characteristically heavy-duty towing engine that provides motive power for hauling a towed or trailered load.
Launched in 2026, the Dongfeng Kinglong KH 640HP is the latest flagship diesel heavy truck built on the advanced D600 intelligent platform, tailor-made for global long-distance trunk logistics, heavy-load transportation and complex mountain road conditions.
Main Features

Cummins Z14NS6B640

Endurant HDTM 14 gears

Diesel

Drum-type
40 Tons

12R22.5
The Kinglong KH 640hp is widely used in:
- Mining transport
- Long-distance transport
- Mountain logistics
- Heavy cargo operations
Description
Powered by a high-efficiency Cummins 14L diesel engine, it delivers 640HP maximum power and 3000N·m peak torque. Strong low-speed torque output ensures outstanding climbing ability and stable full-load driving, perfectly adapting to plateau, mountainous and long-haul routes. Matched with a 14-speed high-efficiency AMT transmission, it realizes smooth shifting, high transmission efficiency and lower long-term maintenance costs. With an aerodynamic streamline design, the drag coefficient is only 0.396. Combined with industry-leading thermal efficiency, this truck achieves excellent fuel economy and effectively cuts daily operating costs. The lightweight whole vehicle design controls the curb weight reasonably, bringing larger legal loading capacity and higher profit space. It adopts a super-large flat-floor cab with premium quiet optimization, creating a spacious and comfortable driving and resting space. Equipped with dual smart screens, ergonomic air suspension seat and intelligent interactive system, it greatly reduces driver fatigue during long-distance transportation. In terms of safety, 71% high-strength steel cab structure, L2-level intelligent driving assistance, AEB, LDWS, 360° panoramic view and full LED lighting system provide all-round active and passive protection. Relying on reliable quality, long service intervals and a complete global after-sales service system, the Kinglong KH 640HP is an ideal high-value transportation solution for cross-border fleets, bulk cargo transport and high-efficiency logistics companies worldwide.
| Basic Configuration | Performance Parameter | ||
|---|---|---|---|
| Drive Type | 6x4 | Engine Model | Cummins Z14NS6B640 |
| GVW | 25 tons | Displacement | 14.5 L |
| Wheelbase | 3450+1350 mm | Emission_std | Euro 6 |
| Cab Style | Semi with beds | Max Torque | 2500 N·m |
| Frame | -- | Transmission | 14+2 Speed AMT |
| Leaf Spring | 2/3 | Rear Axle Ratio | 3.07 |
| Front/Rear Axle | 7000/18000(Two-Axle Group)kg | Max Speed | 89 km/h |
| Tyre | 12R22.5 | Air Condition/AC | With AC |
| Fuel Tank Capacity | Equipped With Spare Tire | With one spare tyre |
Additional information
MOQ: 1 unit
Delivery Time:Within 15 days in Stock; within 30 days out of stock
Payment Method: 30% deposit
Certifications: CCC, ISO9001, ISO14001
Stock ID: DFH4250K28












