1. The G3512B Caterpillar Gas Engine Electrical & Hydraulic Schematic Manual is a comprehensive guide designed for easy reference and troubleshooting of electrical and hydraulic systems in the engine. This manual is specifically tailored for engines with serial number N2S, providing detailed diagrams and information to assist in maintenance and repairs. Ideal for technicians and operators, this manual ensures efficient operation and longevity of the Caterpillar gas engine.