This service repair manual covers the Komatsu 95 Series Diesel Engines, including models such as 3D95S-W-1, 4D95S-W-1, 4D95S-1, 4D95L-W-1, 4D95L-1, S4D95L-1, and 6D95L-1. These robust diesel engines are designed for a variety of applications and are compatible with numerous machine models, including various PC, EC, D, and WA series excavators and loaders. The manual provides comprehensive details, technical data, diagrams, and step-by-step repair instructions, ensuring the continued performance and reliability of your equipment. The purpose of this manual is to offer detailed guidance for the repair and maintenance of the Komatsu 95 Series Diesel Engines. It covers essential areas such as General Information, Engine Mechanical, Fuel System, Exhaust System, Cooling System, Lubrication System, Electrical System, Intake System, and the Preheating System. Designed to be novice mechanic friendly, this English language service repair manual is an indispensable resource for owners, mechanics, and technicians seeking to perform accurate diagnostics and effective repairs.