Simple, durable and efficient, the HCR1500 ED Series II with extendable boom incorporates a self-adjusting drill system that ensures high productivity, no matter what the drilling situation. The 51-in. cab is air-conditioned and continuously pressurized with filtered air to maintain a comfortable operating environment. Low-emission Caterpillar C9 Tier III engines offer low fuel consumption, higher horsepower and meet U.S. exhaust emissions regulations. Increased fuel tank capacity provides more operating hours before refueling. An advanced rotary rod changer allows easy drill rod changes. Operators can add and remove rods using a single lever. Rods can also be indexed in the rack to distribute wear evenly and reduce costs.