The Case 921C Wheel Loader is a robust and versatile machine engineered for demanding operational environments. Featuring a powerful Case 432T/432TA diesel engine with a displacement of 6.7L, it delivers 167 HP and 520 lb-ft of torque, supported by a 4-speed Powershift transmission. Its substantial operating weight of 21,700 kg (47,841 lbs) and a standard bucket capacity of 3.3 m³ (4.3 yd³) make it ideal for heavy-duty material handling, construction, and site development tasks. The articulated power steering and limited-slip differentials on both axles ensure excellent maneuverability and traction in challenging conditions, while the ROPS/FOPS cab provides operator safety. This Workshop Service Manual provides comprehensive guidance for the maintenance and repair of the Case 921C Wheel Loader. It covers essential areas including detailed engine specifications, transmission service, lubrication requirements, and diagnostic procedures. Technical specifications for dimensions, capacities, and performance are included to assist in understanding the machine's capabilities. This manual is designed for professional technicians, offering the necessary information to ensure the optimal performance, reliability, and longevity of the equipment through accurate service and repair practices.