This workshop service repair technical manual provides comprehensive information for the heavy-duty tractor unit, including the 440 and 480 variants, specifically focusing on the Drive Axle 13170 and Dxi12 Series engine. The heavy-duty tractor unit, a heavy-duty tractor unit designed for long-haul transportation and heavy freight, is recognized for its aerodynamic cab, driver comfort, and robust powertrain. Its DXi12 engine, an inline 6-cylinder diesel displacing 11.8 liters, offers power outputs of 440 hp or 480 hp with substantial torque, utilizing Common Rail Direct Injection and turbocharging. The vehicle's design philosophy emphasizes fuel efficiency and durability, reflecting a long heritage in heavy vehicle manufacturing.

This English-language digital manual serves as an essential resource for owners, mechanics, and technicians. It covers a wide array of systems, including the powertrain (engine, transmission, drive axle), chassis, electrical systems, and bodywork. Detailed procedures for scheduled maintenance, component overhaul, major system repairs, and diagnostics are included, alongside specifications for special tools. The manual’s scope ranges from basic troubleshooting and routine maintenance to complete overhauls, ensuring that users can effectively maintain and repair the heavy-duty tractor unit.