This manual provides comprehensive service and repair information for the Nissan 1D1 and 1D2 Series Forklift, specifically those equipped with internal combustion engines. It covers detailed procedures for the Nissan K15, K21, and K25 gasoline/LPG engines, as well as the Nissan QD32 diesel engine. The engineering quality and reliability of these forklifts are supported by this detailed documentation, designed to assist users in maintaining optimal performance. The scope of this workshop manual is extensive, encompassing general information, maintenance schedules, and detailed repair instructions for key vehicle systems. These include the engine, automatic transmission, differential carrier, drive axle, steering axle, wheels and tires, brake system, steering system, hydraulic system, loading mechanism, fuel and exhaust system, vehicle control system, and body components, including the electrical systems. This manual is an essential resource for owners, mechanics, and technicians to effectively service and repair their Nissan forklifts.