This manual covers JCB wheel loaders, specifically models 426ZX, 427ZX, 435ZX, 436ZX, 437ZX, and 446ZX, manufactured from serial number 531001 onwards. These robust machines are powered by a 6.7 L diesel engine, delivering between 153 and 211 horsepower, and feature a 4-speed Powershift automatic transmission for efficient operation. Designed for demanding work environments, these loaders offer substantial bucket capacities ranging from 2.0 to 3.5 m³ and operating weights between 11,000 and 15,000 kg, ensuring high productivity and reliability in construction, material handling, and other heavy-duty applications. This comprehensive Shop and Operator's Manual, provided in English, details essential information for maintaining and operating your JCB wheel loader. It encompasses critical areas such as routine maintenance schedules, engine and transmission specifications, hydraulic system details, cooling system capacity, and braking system information. Furthermore, the manual includes guidance on troubleshooting common issues and provides technical specifications to ensure optimal performance and longevity of the equipment. Owners, operators, and service technicians will find this manual an indispensable resource for safe and effective use and upkeep of their machine.