The Case 921C is a robust piece of equipment engineered for demanding operational environments. This service repair manual covers all aspects of its service and repair, providing detailed information on its diesel engine, which displaces 6.7 liters and produces 185 horsepower with 560 lb-ft of torque. The machine features a Powershift transmission with 4 forward and 3 reverse gears, and an operating weight of 45,740 lbs. Its substantial dimensions, including a length of 269.6 inches with the bucket and a width over tires of 97.8 inches, underscore its capability for heavy-duty tasks. This comprehensive English-language manual serves as an essential resource for maintaining the Case 921C. It details critical maintenance procedures, including engine oil capacity of 5.5 US gallons and hydraulic system oil capacity of 38.5 US gallons, along with recommended replacement intervals for fuel filters (500 hours) and hydraulic filters (1000 hours). Furthermore, the manual provides technical specifications for performance metrics such as standard bucket capacity of 3.0 cubic yards and a rated operating capacity of 22,000 lbs, alongside safety guidelines and troubleshooting advice, ensuring optimal performance and longevity of the equipment.