Hobbywing Combo Pump 8L Brushless Water Pump Instruction Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of the Hobbywing Combo Pump 8L Brushless Water Pump. This high-performance diaphragm pump is designed for plant agriculture UAV drones, offering efficient and reliable spraying capabilities. It features a robust brushless motor and IP67 protection for durability in demanding environments.

2. Safety Information

• Always ensure the power supply matches the specified operating voltage (12-14S DC44-60.9V).
• Do not operate the pump with damaged wiring or connectors.
• Ensure all connections are secure and waterproof, especially in wet environments.
• Avoid direct contact with moving parts during operation.
• The pump is rated IP67 for protection against dust and water immersion up to 1 meter for 30 minutes. However, avoid prolonged submersion or high-pressure water jets directly on electrical connections.
• This product is intended for use with agricultural UAV drones. Ensure proper integration with your drone's system.
• No high-concerned chemicals are present in the product itself. Always handle any sprayed chemicals according to their safety data sheets.

3. Specifications

3.1. 8L/min Model Specifications

3.2. 5L/min Model Specifications (Variant)

4. Setup and Installation

The Hobbywing Combo Pump is designed for convenient installation, featuring a detachable waterproof wire harness.

4.1. Mounting the Pump

• Identify a suitable mounting location on your UAV drone that provides stable support and allows for proper water line routing.
• Use appropriate fasteners to secure the pump via its mounting holes. Refer to Figure 3 for the bottom view showing mounting points.

4.2. Water Line Connections

• Connect the water inlet hose to the 10.5mm inlet port and the water outlet hose to the 6.5mm outlet port. Ensure all connections are tight to prevent leaks.
• The pump is compatible with various fittings, including brass push-to-connect fittings, as shown in some product images.

4.3. Electrical Connections

The pump features a detachable waterproof wire harness for easy installation and replacement.

• Power Connection: The pump requires a 12-14S (DC44-60.9V) power supply. Connect the main power wires (typically red for positive, black for negative) to your drone's power distribution system or battery.
• Signal Connection: The pump is controlled via a PWM signal. Connect the signal wire (often white or brown) to the appropriate PWM output on your flight controller. The fixed PWM throttle stroke is 110-1940US.
• Ensure the 4-pin waterproof connector (Figure 4) and the 3-wire signal/power connector (Figure 5) are securely attached and properly oriented.

5. Operation

• Once installed and connected, the pump's operation is typically controlled by the drone's flight controller or a dedicated spraying system.
• The pump responds to a PWM signal within the range of 110-1940US to control its flow rate.
• Ensure the water tank is filled with the desired liquid before activating the pump.
• Monitor the working pressure (0.5Mpa for 8L/min model, 0.35Mpa for 5L/min model) and flow rate (8L/min or 5L/min) to ensure optimal spraying performance.

6. Maintenance

The Hobbywing Combo Pump is designed for ultra-long life and low maintenance, with a service life exceeding 500 hours.

• Cleaning: Due to its IP67 protection level, the water pump can be directly washed to keep it clean and reduce pesticide corrosion. Ensure electrical connectors are dry before reconnecting power.
• Inspection: Regularly inspect water inlet and outlet diameters (10.5mm and 6.5mm respectively) for any blockages or damage.
• Wiring: Periodically check the wire harness for any signs of wear or damage. The detachable design allows for easy replacement if needed.
• Storage: When not in use for extended periods, drain any remaining liquid from the pump and store it in a clean, dry environment.

7. Troubleshooting

• Pump not activating: Check power connections and ensure the operating voltage is within the specified 12-14S range. Verify the PWM signal from the flight controller is being sent correctly.
• Low flow or no flow: Inspect water inlet and outlet hoses for kinks, blockages, or leaks. Ensure the water tank is not empty. Check for any debris in the pump's intake.
• Unusual noise: Disconnect power and inspect the pump for any foreign objects or loose components. Ensure it is securely mounted.
• Intermittent operation: Check all electrical connections for looseness or corrosion. Verify the stability of the power supply and PWM signal.

8. User Tips

• Direct Connection: The pump can be connected directly to the battery for power and to the flight controller's PWM output for control. Always verify voltage and signal compatibility with your specific flight controller model.
• Pre-flight Check: Before each flight, perform a quick check of all water line connections and electrical wiring to ensure they are secure and free from damage.
• System Integration: When integrating with a new drone system, it is recommended to test the pump's functionality and flow rate with water before using any agricultural chemicals.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your original point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.