Haul trucks are off-road, heavy-duty dump trucks specifically engineered for use in high-production mining and exceptionally demanding construction environments. Most are dual axle; at least two examples of tri-axles were made in the 1970s. Haul trucks are denominated by their payload capacity, by weight (variously in tons, tonnes, and kg).
Most haul trucks have a two-axle design, but two well-known models from the 1970s, the 350T Terex Titan and 235T WABCO 3200/B, had three axles. Haul truck capacities range from 401NaN1 to nearly 5000NaN0.
An example on the smaller end is the Caterpillar 775 (rated at 70ST).[1] Quarry operations (which produce payloads that have value) are typically employ smaller trucks than mining operations (such as removing undesirable overburden, an expense).
Haul trucks can generally be distinguished from standard dump trucks by:
Most large haul trucks use some form of traction motors coupled to regenerative brakings for power, braking, or both.
Haul trucks are classified by:
The largest, highest-payload-capacity haul trucks are referred to as ultra class trucks. The ultra class includes all haul trucks with a payload capacity of 300ST or greater., the BelAZ 75710 has the highest payload capacity, 450t.[2]
| image | model | manufacturer | first model | number built | capacity | propulsion type | notes | |
|---|---|---|---|---|---|---|---|---|
| 2013 | 496short ton | diesel-electric | Employs 8 tires, on two axles, with all-wheel drive, and all-wheel steering. | |||||
| 2004 | 400short ton | diesel-electric | ||||||
| 2008 | 400short ton | diesel-electric | Firm was acquired by Caterpillar in 2010. | |||||
| 1997 | 360short ton | diesel-mechanical | The 797F model has an increased capacity of 400 short tons. | |||||
| 2008 | 360short ton | diesel-electric | ||||||
| 2005 | 350short ton | diesel-electric | ||||||
| General Motors Diesel Division | 1973 | 1 | 350short ton | diesel-electric | Prototype, only 1 built | |||
| Komatsu 930E | Komatsu America Corp. | 1995 | 2,100 | 320short ton | diesel-electric | Number built as of September, 2018 |