This comprehensive service and repair manual for John Deere 853G/850, 903G/900, and 953G/950 tracked feller bunchers (also known as Timberjack 850, 900, and 950) provides detailed instructions and illustrations for maintaining and repairing these powerful forestry machines. The manual covers a wide range of components and systems, ensuring you have the necessary information to perform repairs and troubleshooting effectively.

The manual begins with essential general information, including safety precautions, specifications, torque values, and guidance on fuels and lubricants. It then delves into specific components and systems, starting with the track drive system, including discussions on track components, drive sprockets, chains, rollers, and recoil mechanisms.

The manual thoroughly covers the engine and its auxiliary systems. This includes detailed instructions for engine removal and installation, along with information on the engine cooling system, radiator, fan shroud, air intake, exhaust system, engine mounts, and fuel tank.

The manual provides detailed information on the machine's frames, covering installation procedures and chassis weights. It offers a comprehensive guide to the operator's station, including the cab and its heating and air conditioning systems.

The manual also includes detailed descriptions of the machine's sheet metal and styling, with specific sections on the engine enclosure.

A large portion of the manual focuses on the main hydraulic system. The content covers the removal and installation of the system, various hydraulic components, control valves, the hydraulic reservoir, filters, cooler, and cylinders.

The manual provides detailed instruction on the machine's booms, including removal and installation instructions and information on the hydraulic cylinders used in the boom system.

A dedicated section covers the swing system, providing information on the swing gearbox, swing bearing, and the associated hydraulics.

Finally, the manual includes helpful information on dealer-fabricated tools.

This manual is a valuable resource for mechanics, technicians, and anyone involved in maintaining and repairing John Deere 853G/850, 903G/900, and 953G/950 tracked feller bunchers. Its detailed instructions, illustrations, and comprehensive coverage ensure you have the information you need for efficient and effective repairs.