This comprehensive Western Star 4700, 4800, 4900, 5900, and 6900 Series Truck Workshop Service Manual covers all models and engines built from 2001 to 2010. It provides detailed information and instructions for servicing and repairing your truck, ensuring you have the resources to keep it running smoothly. The manual includes a wealth of information, starting with general information, specifications, and tightening torques. It then delves into specific systems, covering the engine, air intake, air compressor, alternator, starter, cooling, radiator, clutch, transmission, throttle control, frame and chassis, body components, suspension, front and rear axles, wheels and tires, driveline, brakes, steering, fuel, exhaust, electrical, battery, charging, control, instrument panel, lighting, troubleshooting, cab accessories, doors and glass, wiper and washer, heating and ventilation, air conditioning, hood, grill, cab fenders, seat systems, restraint system, and painting system. The manual also includes helpful circuit codes and wiring diagrams to assist with diagnostics and repair. With over 2100 pages of detailed illustrations, step-by-step instructions, and clear diagrams, this manual is an invaluable resource for both DIY enthusiasts and experienced mechanics. It provides the necessary guidance to perform routine maintenance, larger repairs, and modifications at home, saving you time and money.