This comprehensive John Deere 21C, 21S, 25S, 30S, 38B Gasoline Line Trimmers, Brush Cutters Service Technical Manual (TM1494) provides detailed instructions and diagrams for servicing your equipment. The manual is designed for both DIY enthusiasts and experienced mechanics, with clear explanations and step-by-step procedures. The manual covers every aspect of your machine, from engine repair to cutting head and blade maintenance.

The manual is organized into sections for easy navigation. Section 10 covers general information, including safety, specifications, repair specifications, fuels and lubricants, features and attachments, and service information bulletins. Section 20 focuses on engine repair, with detailed instructions for disassembling, inspecting, repairing, and assembling the engine, along with guidance on recoil starters and mufflers. Section 30 covers fuel and air repair, covering air cleaners, fuel lines and filters, carburetors, and throttle cables.

Section 40 is dedicated to electrical repair, covering the flywheel and ignition system. Section 50 covers power train repair, including the clutch and drum assembly, drive shaft, and lower housing. Section 60 delves into cutting head and blades, with specific instructions for nylon line cutting heads.

The manual also includes sections dedicated to testing and adjustment specifications, operational checkout procedures, engine operation and tests, fuel/air operation, tests, and adjustments, electrical operation, tests, and adjustments, including wiring schematics, power train operation, tests, and adjustments, and cutting heads and blades operation, tests, and adjustments. With a comprehensive index, you can easily find the information you need to successfully service your John Deere line trimmer or brush cutter.

The John Deere 21C, 21S, 25S, 30S, and 38B gasoline line trimmers and brush cutters are powerful and versatile tools designed for tackling a wide range of landscaping tasks. These machines are built with durability and performance in mind, featuring robust construction and reliable engines to handle demanding applications. The 21C, 21S, and 25S models are ideal for trimming grass and weeds around fences, trees, and other obstacles, while the 30S and 38B models offer increased power and cutting capacity for clearing thicker vegetation and brush. Each model boasts a variety of features to enhance operator comfort and efficiency, including adjustable handlebars, ergonomic grips, and easy-to-use controls.

The John Deere line trimmer and brush cutter models are powered by reliable and efficient gasoline engines. These engines provide ample power for a variety of applications while minimizing fuel consumption and emissions. The cutting head design and blade options vary across the models, allowing users to tailor their equipment to specific tasks. For example, the 21C and 21S models feature a single line head for precision trimming, while the 38B model utilizes a heavy-duty blade for tackling tougher brush and vegetation. The John Deere TM1494 service technical manual provides comprehensive information on troubleshooting, maintenance, and repair for all of these models, ensuring that users can keep their equipment in peak condition for years to come.