The JAC Refine K3 Heavy Duty 300HP 6X4 5.6m Dump Truck is tailored for regional operators who need reliable medium-haul capability without overspending on excess power—ideal for shuttling 12 tons of gravel from a local quarry to suburban landscaping yards, delivering concrete blocks to township road repair sites, or hauling excavated soil from small residential development lots. Powered by a Yuchai YC6JA300-60 diesel engine, it delivers 300 horsepower and 1100 N·m of torque at 1400-2000 rpm—enough to handle 13° rural slopes (common near small quarries) with a full load, while avoiding the fuel waste of higher-horsepower models. Paired with a Fast 8J110TA 8-speed manual transmission (simpler to operate and maintain than 10-speed variants), it shifts smoothly between 55km/h regional roads (to meet daily delivery targets) and slow, controlled movement in small quarry yards. The 6X4 drive setup and 5.92 rear axle ratio provide steady traction on loose gravel or wet job-site soil, while its 5.9-meter turning radius lets it navigate narrow township lanes that larger trucks can’t access.​

What makes this model a budget-friendly standout is its 5.6m×2.3m×1.4m dump body and low-maintenance design. Constructed from Q355B high-strength steel (durable enough for medium loads while keeping upfront costs lower than Q690 alternatives), the body resists dents from aggregates and corrosion from wet soil—with a simple, easy-to-clean interior that cuts post-use maintenance time. The hydraulic lifting system uses a single-pump design (reliable and cheaper to repair than dual-pump setups) to raise a full load in 26 seconds—fast enough for small-scale daily runs, without the complexity of high-performance systems. Underneath, a reinforced single-layer frame (260×80×10mm) and 9/9/11-leaf spring suspension balance durability and cost, absorbing bumps from rural roads without the expense of heavy-duty shock absorbers. It also features standard-size tires (10.00R20) and common electrical components—widely available at local repair shops, so parts replacement doesn’t require special orders or high costs.​

For budget-focused operators, the Refine K3 300HP delivers unmatched value at every stage. Its 300L fuel tank covers 280+ km per fill—enough for 3-4 daily runs between a local quarry and nearby job sites—while the Yuchai engine’s efficient combustion keeps average fuel consumption at 24-26L per 100km, 9% lower than the 336HP K3 variant. Maintenance costs are also reduced: the engine uses 12,000km long-life oil (longer intervals than entry-level models), and brake pads last 60,000km even with frequent use. Inside the cab, practicality takes priority over luxury—an adjustable fabric seat (comfy for 6-8 hour shifts), a 7-inch display with reverse camera (critical for tight parking in small yards), and basic climate control (simple to maintain and energy-efficient). It’s the no-frills, reliable workhorse that lets small regional operators take on medium-haul tasks—without stretching their budgets on unnecessary power or features.​