Overbeck 400 IR (600 IR) Manual Overbeck 400 IR Grinding Machine (this should also assist with the larger capacity 600 IR). Comprehensive Instruction Manual with 23 Wiring Diagrams and 3 Hydraulic Schematics with a Hydraulic Parts Listing. Manufacturers: Overbeck Models: 400 IR 400 IR 600 IR Contents: Operators Manual Electrical Diagrams Technical Drawings