Which haul truck carries more? Comparing Komatsu HM400, Cat 777, Volvo A40G

Choosing the right haul truck or dump truck for a project requires more than just checking specs. Between medium-capacity articulated trucks and large rigid mining trucks, each machine has unique strengths in payload, efficiency, and terrain handling.

In this article, we will cover:

• A detailed spec comparison of the Komatsu HM400-5, Cat 777, and Volvo A40G.

• The differences between rigid vs articulated dump trucks and haul trucks vs dump trucks.

• Real-world operator insights on maintenance, cost, and performance.

• Recommendations on which truck fits which project type, ensuring optimal productivity.

Haul Trucks vs. Dump Trucks

While the terms are sometimes used interchangeably, there’s an important distinction. Dump trucks are versatile and widely used in construction projects, especially within cities and urban areas, thanks to their ability to travel on public roads. They’re suitable for moving aggregates, soil, and demolition debris over shorter distances.

Haul trucks, on the other hand, are purpose-built for mining and large-scale earthmoving. Unlike dump trucks, they are not road-legal and are designed exclusively for off-highway use, with massive payload capacities, reinforced frames, and heavy-duty tires built to handle extreme loads and rugged terrain.

Articulated vs. Rigid Haul Trucks

One of the most important distinctions is between articulated vs rigid haul trucks:

• Articulated haul trucks feature a pivot joint between the cab and the dump body, giving them superior maneuverability on uneven or muddy terrain. They’re commonly used in quarries, road construction, and medium-scale mining.

• Rigid haul trucks have a solid frame and excel in large, stable environments like open-pit mines. Their higher payload capacity makes them the best haul truck for mining operations that prioritize volume and efficiency over flexibility.

Key Factors in Choosing a Hauling Truck

When evaluating which truck suits a project best, decision-makers typically consider:

• Payload capacity: the maximum tonnage the truck can carry safely.

• Terrain adaptability: whether the ground is uneven, steep, or firm.

• Fuel efficiency: which directly affects operating costs.

• Maintenance and parts availability: crucial for minimizing downtime.

By understanding these differences, operators can match the right machine to their project, avoiding the cost of over- or under-sizing.

Technical specifications worth noting

When evaluating heavy machines for productivity, the first question operators ask is about payload capacity. Below is a structured comparison of the four models:

Specs tell part of the story, but real-world selection depends on additional factors like terrain, fuel costs, and maintenance.

What is said about These Machines

Volvo A40G

“I used to drive one of those in a mining pit, those things are beasts. Nothing more fun than locking in all 3 axles and pushing through 3-4 ft of mud.”

Cat 777 (777G)

“That triple 7 is massive… but a total lightweight in the industry compared to some of the trucks out there.”

What is the best haul truck?

“Best haul truck” depends on the scale and nature of the project:

For contractors working on roads or urban infrastructure, the Komatsu HM400-5 and Volvo A40G provide the most practical balance of payload, fuel efficiency, and mobility. For mining operators aiming for bulk haulage, the Cat 777 brings value in versatility.

Beyond specifications and value, it’s also useful to look at how these machines are described in practice.

How to Choose the Right Haul Truck

Determine project type and terrain

• Articulated trucks (Komatsu HM400, Volvo A40G): excel on uneven or muddy ground.

• Rigid trucks (Cat 777): better suited for long, well-maintained haul roads.

Assess payload requirements

• Mid-range projects (30–50 tons): Komatsu HM400 or Volvo A40G.

• Large quarry/mine operations (90–100 tons): Cat 777.

Evaluate budget and operational costs

Consider not just purchase price but also fuel burn, tire costs, and service intervals.

Consider operator experience and safety

• Articulated trucks are easier to maneuver for less experienced operators.

• Rigid trucks require skilled operators and a controlled site environment.

Quick Decision-Making Checklist

Is bigger always better in haul trucks?

Not necessarily. Ultra-class trucks excel in large open-pit mines, but they require maintained haul roads, massive job sites, and high capital investment. For smaller or uneven terrain projects, articulated trucks like the Komatsu HM400-5 or Volvo A40G are more practical.

How much does a mining haul truck cost?

Pricing varies by class:

• Articulated haulers like Komatsu HM400-5 or Volvo A40G → generally in the $400,000 to $600,000 range.

• Rigid mining trucks like the Cat 777G → typically $1–1.5 million.
  
  

What is the largest haul truck in the world?

Beyond the models compared here, the BelAZ 75710 (Belarus) is currently the world’s largest, capable of hauling 450 tonnes. 

Final Thoughts

From 40-ton articulated haulers like the Komatsu HM400-5 to 100-ton rigid trucks like the Cat 777G, haul trucks cover a wide spectrum of sizes and capabilities.

• For infrastructure and quarrying, articulated trucks bring the best balance of efficiency and mobility.

• For mining and bulk haulage, rigid trucks deliver unmatched payload capacity and long-term value.

By aligning payload needs with project scale and terrain, operators can make confident decisions. Platforms like makana.com further simplify the process with inspection-backed listings and virtual tours, making buying or selling heavy equipment more transparent.