The Zetor 4911, 4945, 5911, 5945, 6911, and 6945 models, produced between 1977 and 1980, represent robust and reliable utility tractors. These vehicles are characterized by their strong build quality and straightforward mechanical design, making them well-suited for a wide array of agricultural tasks including ploughing, tilling, and operating power take-off implements. The 4WD variants offer enhanced traction for demanding work and challenging terrain. Designed with durability and ease of maintenance in mind, these tractors were engineered to be affordable and dependable workhorses, particularly popular in various agricultural markets. This Parts Catalog manual provides comprehensive identification of all components for the Zetor 4911/4945/5911/5945/6911/6945 models. It details numerous systems, including engine, transmission, hydraulic, braking, steering, fuel, cooling, electrical, chassis, axles, operator station, PTO, and linkage. The manual features detailed exploded view diagrams with corresponding part numbers, facilitating precise component identification and ordering. Its primary purpose is to assist farmers, agricultural workshops, and parts suppliers in accurately sourcing and managing replacement parts for these tractors, ensuring operational continuity and effective maintenance.