The CASE CX135SR is a robust Crawler Excavator engineered for demanding construction and excavation tasks. This Short Radius (SR) model offers exceptional maneuverability in confined spaces, making it ideal for urban environments and tight job sites. Built with CASE's commitment to reliability and performance, the CX135SR features a powerful Isuzu-likely diesel engine displacing 4.3 liters, producing up to 97.7 gross horsepower. Its hydrostatic transmission and tracked drive system ensure efficient power delivery and stability across varied terrain. With an operating weight of approximately 13,870 kg (30,579 lbs) and impressive digging capabilities, including a maximum digging depth of 5620 mm, this excavator is designed for productivity and durability. This Service Manual provides comprehensive guidance for the maintenance, repair, and troubleshooting of the CASE CX135SR Crawler Excavator. It covers essential operational details, technical specifications, and recommended service intervals, including fluid capacities for engine oil, hydraulic oil, and coolant. Detailed procedures are outlined to assist owners, mechanics, and technicians in keeping the machine in optimal working condition. The manual's purpose is to facilitate efficient repair and troubleshooting, ensuring the longevity and performance of your equipment through accurate and accessible technical information.