1. The John Deere 4920 Self-Propelled Sprayer Diagnosis & Test Manual TM2125 is a comprehensive guide designed to assist in diagnosing and testing the various components of the sprayer. This manual provides detailed instructions and procedures for troubleshooting any issues that may arise, ensuring optimal performance and efficiency of the equipment. Ideal for technicians and operators, this manual is a valuable resource for maintaining and servicing the John Deere 4920 Self-Propelled Sprayer.