This manual covers the mechanical and hydraulic aspects of the 75P and 90P excavators. These machines are engineered for robust performance in demanding environments, offering a blend of power, precision, and durability. Their design prioritizes operational efficiency and longevity, making them suitable for a wide range of construction and heavy-duty applications. The focus on advanced hydraulic systems ensures responsive control and optimal power delivery for complex tasks. The purpose of this document is to provide comprehensive technical information for the maintenance and repair of the 75P and 90P excavators. It details essential procedures, diagnostic strategies, and technical specifications necessary for ensuring the optimal functioning of these machines. Owners, operators, and service technicians will find this manual invaluable for understanding the intricate systems, performing routine upkeep, and addressing any operational issues that may arise, thereby maximizing the service life and productivity of the equipment.