Cat Pumps’ gearbox pumps are long-lasting direct-drive pumps that can be mounted on standard gas or diesel engines, running up to 24 HP. The gearbox drive has a 2 to 1 ratio allowing the pump to run at half the speed of the engine. This configuration provides a compact assembly without running the pump at high engine RPM’s. The gearbox is completely sealed making them ideal to handle a variety of environmental conditions including rain, dust, humidity and anything else mother nature throws at it. Cat Pumps’ gearbox pumps are commonly found on commercial-duty pressure washers and designed for continuous duty use.