The new track-mounted GT440 from KPI-JCI and Astec Mobile Screens features an Andreas 4240 horizontal-shaft impact crusher, which allows a three- or four-bar rotor configuration for application flexibility. The GT440 uses a vibrating grizzly feeder with a large hopper, and an optional grizzly pre-screen is designed to keep the crusher fed and operating efficiently, says the manufacturer. The grizzly pre-screen uses independent vibrating fingers designed to resist blinding and plugging, and the replaceable pre-screen module provides multiple settings for scalping unwanted material.