This comprehensive service and repair manual provides detailed instructions for maintaining and repairing JLG Boom Lifts 400S and 460SJ CE models. The manual is designed for technicians and mechanics, offering step-by-step procedures and highly detailed exploded diagrams to ensure accurate and efficient work. Covering all aspects of repair, this manual is an essential resource for anyone seeking to service these aerial work platforms. The manual is organized into seven sections, covering a wide range of topics: * **Section 1: Specifications:** Provides vital information about the JLG Boom Lifts 400S and 460SJ CE, including dimensions, weights, capacities, and other crucial technical data. * **Section 2: General:** Offers an overview of the boom lift's design, operation, and safety procedures. * **Section 3: Chassis & Turntable:** This section details the construction and maintenance of the chassis and turntable assembly, including components like the drive system, steering, and brakes. * **Section 4: Boom & Platform:** Provides detailed information on the boom structure, platform mechanisms, and associated components. * **Section 5: Hydraulics:** This section covers the hydraulic system comprehensively, including pumps, valves, cylinders, and hoses. * **Section 6: JLG Control System (S/N 61718 to Present):** Covers the electronic control system, providing diagnostics and repair procedures for models with serial numbers 61718 and above. * **Section 7: Basic Electrical Information & Schematics:** Details the electrical system's operation, wiring diagrams, and troubleshooting procedures.

The JLG 400S and 460SJ boom lifts are robust and versatile aerial work platforms designed for a variety of applications, including construction, maintenance, and industrial work. These models are known for their exceptional reach and lifting capacity, making them suitable for tasks requiring access to elevated areas. The 400S boasts a working height of 40 feet, while the 460SJ extends to a remarkable 46 feet. Both models feature a 360-degree rotation, ensuring complete accessibility around the work area. With a maximum platform capacity of 500 pounds, these boom lifts can comfortably accommodate two workers and their tools. The 400S and 460SJ are equipped with a powerful hydraulic system that provides smooth and precise movements, allowing for efficient positioning and operation. They are also designed with safety features such as an emergency descent system and an overload alarm, ensuring operator and equipment protection. The JLG 400S and 460SJ boom lifts are powered by a reliable and efficient diesel engine, providing the necessary power for lifting and maneuvering. These models are equipped with a compact and maneuverable chassis, allowing them to navigate tight spaces and uneven terrain. The 400S and 460SJ are built with durable and high-quality materials, ensuring long-lasting performance and reliability. Their rugged construction makes them suitable for demanding work environments. The JLG 400S and 460SJ boom lifts are backed by a comprehensive service and support network, providing customers with access to genuine parts and expert technical assistance. The availability of factory service manuals, like the one referenced (P/N: 3120895), further enhances the ease of maintenance and repair for these models, ensuring optimal performance and minimizing downtime.