This manual covers the Volvo TWD1620GE GH engine, a robust diesel power unit designed for demanding applications. Featuring a 16.1-liter displacement, inline 6-cylinder configuration, and turbocharged intercooled air intake, this engine delivers impressive performance with power outputs up to 542 hp and torque up to 2495 Nm. Its direct injection, electronically controlled unit injectors ensure efficient fuel delivery. The liquid-cooled system and robust construction underscore Volvo's commitment to engineering quality and reliability in heavy-duty operations. The purpose of this English Service Repair Manual (WSM) is to provide comprehensive guidance for the maintenance and repair of the Volvo TWD1620GE GH engine. It details essential information, including technical specifications, lubrication requirements, and fluid capacities. Owners, mechanics, and technicians will find procedures for routine maintenance, troubleshooting, and in-depth repair, ensuring the optimal performance and longevity of the engine. This manual is an indispensable resource for understanding and servicing this powerful diesel engine.