A system for recharging a railcar air-brake system for a road-rail vehicle, including a rail-capable material handler, adapted or modified for transporting an at least one railcar that permits an air compression system to provide a near-constant low-volume airflow to recharge the respective air-brake systems without requiring the road-rail vehicle to be driven. The system can generally comprise a hydraulic pump, an air compressor, and at least one railcar air-brake system. The system can be adapted for recharging railcar air-brake systems for a road-rail vehicle adapted for transporting at least two railcars that does not significantly diminish the utility of the road-rail vehicle.