The machine is built around a robust direct drive Terex® CR032 Ø1270mm x 1220mm (Ø50” x 48”) impact chamber crusher. Specification. Value. Net Engine Power. Tier 3 - Cat 540hp | Tier 4F / Stage IV - Scania 500hp. Tier 3 - Cat 403kW | Tier 4F / Stage IV - Scania 364kW. Rotor Size