This manual covers the Nissan Forklift Internal Combustion 1D1 and 1D2 Series, providing comprehensive technical information for these industrial vehicles. Engineered for reliability and efficient operation, these forklifts are designed to meet the demanding requirements of various material handling applications. This document serves as an essential resource for understanding the intricacies of the 1D1 and 1D2 models, ensuring optimal performance and longevity. The purpose of this service and repair manual is to offer detailed guidance for maintenance, diagnostics, and repair procedures. It includes sections on general information, engine service for K15/K21/K25 gas/LPG and QD32 diesel engines, transmission, braking, steering, hydraulic systems, and electrical components. With clear instructions and diagrams, this manual is intended for both owners performing routine upkeep and professional technicians undertaking complex repairs, enabling effective vehicle management.