Powerscreen improved its X400S jaw crusher by incorporating a fully independent, high-amplitude, hydraulically driven pre-screen with increased drop angle on the bottom deck. The company says the pre-screen removes a large percentage of the fines within the feed material before it enters the jaw chamber, resulting in a cleaner crushed product. The discharge opening from the under chute has been increased from 8 inches to 12-3/4 inches, allowing pre-screened material to bypass the crushing chamber quickly. The side conveyor features an increased width from 24 inches to 26 inches and an improved discharge height of 9 feet, 2 inches. Other features include quick set-up time, optional improved hopper capacity, and a more efficient transfer of screened material to the side conveyor.