This comprehensive technical manual provides detailed information for maintaining, assembling, disassembling, and servicing John Deere 34, 35, 38, and 3800 Forage Harvester Gear Cases. It delves into the intricacies of these essential components, offering a thorough understanding of their operation and maintenance procedures.

The manual is divided into sections covering various gear case types, including the bevel gear case, sprocket-type feed roll gear case, and shift-type feed roll gear case. This comprehensive guide ensures you have the complete information needed to handle any maintenance or repair tasks for these gear cases, allowing you to keep your John Deere forage harvester operating efficiently and reliably.

The John Deere 34, 35, 38, and 3800 Forage Harvesters are powerful and versatile machines designed for efficient and high-capacity harvesting of a wide range of forages, including corn, sorghum, alfalfa, and small grains. These models, produced from the late 1970s to the mid-1980s, were known for their robust construction, reliable performance, and advanced features for their time. The 34, 35, and 38 models featured a range of engine options, including the 6-cylinder John Deere 4045 diesel engine, providing ample power for cutting, chopping, and conveying forages. The 3800 model, introduced later, featured a more powerful 6-cylinder John Deere 4045 turbocharged diesel engine, further enhancing its capabilities for high-volume harvesting.

These forage harvesters offered a variety of cutting and chopping systems, including a variety of drum-type headers and a sophisticated chopping mechanism. The John Deere 34, 35, 38, and 3800 forage harvesters were equipped with a large-capacity crop flow system, designed to handle heavy volumes of forages. They offered adjustable chopping lengths to meet specific requirements for various feed applications. These machines were also designed with a focus on operator comfort and convenience, featuring a spacious and well-equipped cab with controls for all major functions. The robust construction and advanced design of these forage harvesters made them reliable and efficient machines, capable of handling large-scale harvesting operations with minimal downtime. The John Deere 34, 35, 38, and 3800 forage harvesters played a significant role in the advancement of forage harvesting technology, contributing to improved efficiency and productivity for farmers and livestock producers during their production years.