This manual covers the Simplicity 4040, 4041, and 9020 Power Max Tractor models. Simplicity is recognized for its durable and user-friendly lawn and garden tractors, built on a heritage of reliable engineering. The Power Max series represents Simplicity's robust line of tractors designed for heavier duty tasks in landscaping and property maintenance, offering quality construction and dependable performance. This comprehensive Service and Repair Shop Manual provides in-depth coverage for all engine types across the specified models. It details engine service, powertrain, hydraulic systems, electrical systems, chassis, frame, and brake systems. The manual includes routine maintenance procedures, systematic troubleshooting guides, component repair instructions, overhaul procedures, wiring diagrams, and critical torque specifications. Designed for both DIY mechanics and professional technicians, this manual aims to simplify complex repair tasks, enabling efficient maintenance and repair to reduce labor costs.