The John Deere 9960 Cotton Picker Operation and Tests Technical Manual provides comprehensive technical information for understanding and servicing this agricultural equipment. This manual is an invaluable resource for both experienced mechanics and do-it-yourselfers. It is designed to guide users through various aspects of the cotton picker, from basic operation to detailed troubleshooting and repair procedures.

The manual is organized into several sections, each focusing on a specific system or component of the 9960 Cotton Picker.

**Section 210 - General:** This section begins with essential information on safety practices, machine operational checkout procedures, and diagnostic/testing methods. It also covers tune-up and adjustment procedures for various components.

**Section 220 - Engine Operation and Tests:** This section delves into the engine system, including operational checks, diagnostic information, engine system operation and tests, system adjustments, and a detailed explanation of the engine's theory of operation.

**Section 230 - Fuel and Air Operation and Tests:** This section covers the fuel and air systems, providing operational checks, diagnostic information, system tests, adjustments, and a detailed explanation of the system's theory of operation.

**Section 240 - Electrical Operation and Tests:** This section focuses on the electrical system, providing comprehensive information on system diagrams, power circuit diagnostics, start circuit diagnostics, charging circuit diagnostics, dome light circuit diagnostics, turn signal circuit diagnostics, warning circuit diagnostics, road lamp circuit diagnostics, field lamp circuit diagnostics, windshield wiper circuit diagnostics, pressurizer fan circuit diagnostics, gauge circuit diagnostics, start aid circuit diagnostics, tachometer circuit diagnostics, operator presence and inspection by-pass diagnostics, and monitor circuit diagnostics.

**Section 250 - Power Train Operation and Tests:** This section covers the power train system, providing operational checks, diagnostic information, system tests, adjustments, and a detailed explanation of the system's theory of operation.

**Section 260 - Steering/Brakes Operation and Tests:** This section focuses on the steering and brake systems, providing diagnostic information, system tests, adjustments, and a detailed explanation of the systems' theory of operation.

**Section 270 - Hydraulic System Operation and Tests:** This section covers the hydraulic system, providing operational checks, diagnostic information for the hydraulic pump, main control valve, hydraulic cylinders, and height sensing system, as well as system tests, adjustments, and a detailed explanation of the hydraulic system's theory of operation and individual component operations.

**Section 290 - Operators Station Operation and Test:** This section covers the operator's station, providing operational checks, diagnostic information, tests, adjustments, and a detailed explanation of the system's theory of operation.

**Section 300 - Picking Unit Operation and Tests - Conventional Unit:** This section focuses on the picking unit, providing diagnostic information, adjustments, and a detailed explanation of the unit's theory of operation.

**Section 310 - Picking Unit Lubrication System Operation & Tests:** This section covers the picking unit lubrication system, providing operational checks, diagnostic information, tests, adjustments, and a detailed explanation of the system's theory of operation.

**Section 320 - Moistener System Operation and Tests:** This section focuses on the moistener system, providing diagnostic information, adjustments, and a detailed explanation of the unit's theory of operation.

**Section 330 - Air System Operation and Tests:** This section covers the air system, providing diagnostic information, adjustments, and a detailed explanation of the system's theory of operation.

The manual also includes a comprehensive index for easy reference. This manual provides an in-depth guide for understanding and servicing the John Deere 9960 Cotton Picker, enabling users to maintain their equipment effectively and efficiently.

The John Deere 9960 Cotton Picker, a behemoth of the agricultural world, was a technological marvel of its time. This self-propelled machine, a pinnacle of John Deere's engineering prowess, was designed to revolutionize cotton harvesting. Introduced in the late 1980s, the 9960 was a successor to the 9950, boasting numerous improvements aimed at increasing efficiency and productivity. The 9960 featured a powerful diesel engine that provided ample power to drive the various mechanisms of the picker, including the large picking drums, the intricate cleaning system, and the robust transport system. Its advanced design incorporated features like a high-capacity module builder, a sophisticated control system, and a spacious and comfortable operator's cab, all contributing to a more efficient and comfortable harvesting experience.

The 9960 was a testament to John Deere's dedication to innovation in the field of agricultural machinery. Its advanced technology, including a highly efficient picking system, meticulous seed-cotton cleaning, and a robust transport system, transformed cotton harvesting into a streamlined and productive process. The 9960 also incorporated safety features and ergonomic design elements to prioritize operator wellbeing. This machine, a true icon of cotton harvesting, served as a crucial tool for farmers seeking to maximize their yields and minimize downtime, ultimately contributing to increased profitability in the cotton industry. The 9960, despite its age, continues to be a symbol of John Deere's commitment to providing farmers with dependable and innovative equipment that helps them achieve success in their endeavors. The TM1521 technical manual, a comprehensive guide for operators and maintenance personnel, provides detailed information on the 9960's operation, maintenance, and troubleshooting, ensuring its continued performance and longevity.