Daily Inspection Guide for Hydraulic System of 200KG Lifting Drone (Applicable to Non-Professionals)

This guide is designed for non-professionals, focusing on the core safety checkpoints of the 200KG lifting drone hydraulic system. The operation does not require professional tools or deep technical background. You only need to follow the basic principles of "see, listen, and touch" to focus on troubleshooting safety hazards to ensure the normal operation of the hydraulic system. Before inspection, please make sure that the drone has been powered off, placed on a flat and stable ground, and that there are no obstacles or human interference around it.

1. Preparation before inspection

• Personal protection: Wear non-slip gloves (to avoid scratching your hands), protective glasses (to prevent oil from splashing into your eyes), and wear non-slip flat shoes.

• Tool preparation: clean rag (non-fiber shedding type), flashlight (used to view hidden parts), paper towel (wiping inspection).

• Environmental confirmation: Make sure the inspection area is dry, ventilated, free of open flames and heat sources (hydraulic oil is flammable), and kept away from children and unrelated persons.

2. Specific inspection steps (operate in order)

Step 1: Appearance cleaning and overall inspection

Use a clean rag to gently wipe the exposed pipelines, joints, tank shells and actuators (such as hydraulic telescopic rods) of the hydraulic system to remove surface dust, oil and debris. Observe during the wiping process:

• Whether the pipeline is obviously damaged, aged, cracked (shown as brittle surface, cracked), deformed or squeezed；

• Check whether the joint is loose (just shake the joint gently with your hand until there is no obvious displacement, do not twist it too hard)；

• Check whether the tank shell is bumped or deformed, and whether the seal is intact.

If you find that the pipeline is damaged, the joints are severely loose, or the fuel tank is deformed, stop using it immediately and contact professional maintenance personnel. Do not handle it yourself.

Step 2: Hydraulic oil level and quality inspection

Find the liquid level observation window of the hydraulic oil tank (usually made of transparent plastic, marked with "MAX" the highest liquid level line and "MIN" the lowest liquid level line). There is no need to open the tank cap and check directly through the observation window:

• Fluid level: The hydraulic oil level should be between "MAX" and "MIN". If it is lower than the "MIN" line, the same type of hydraulic oil needs to be replenished (replenishment operations must be guided by professionals. Non-professionals should not open the cap and refill by themselves)；

• Oil quality: Normal hydraulic oil is transparent or light yellow, with no impurities, no turbidity, and no stratification. If it is found that the oil turns black, white, has sediment or foam, it means that the oil has deteriorated and needs to be replaced by a professional.

Step 3: Leak Check (Core Security Point)

Hydraulic system leakage is a major safety hazard and requires focused investigation. Wipe the following key areas with a paper towel or dry rag to check for oil stains:

• Pipe joints (the interface locations of all connected pipes)；

• Hydraulic pump and motor connection part；

• Actuator piston rod (exposed part of hydraulic telescopic rod)；

• Fuel tank sealing port (around the fuel tank cap and at the shell seam).

If you find obvious oil stains on the paper towel/rag after wiping, or if you directly observe oil dripping or seeping, it is a leakage fault. You need to stop using the drone immediately and contact professional maintenance personnel for repair.

Step 4: Moving Parts Flexibility Check

When the drone is powered off, manually push the hydraulic actuator (such as the hydraulic telescopic rod of the lifting arm) to check whether its movement is smooth:

• No lag or obvious resistance (under normal circumstances, it can be pushed slowly manually without brute force)；

• There are no abnormal noises during the activity (such as "squeaking" and "stumbling" sounds)；

• There are no scratches or deformations on the surface of the telescopic rod, and there is no looseness after telescopic rod is in place.

If the movement is stuck, the resistance is too large, or there are abnormal noises, it may be due to abnormal pressure in the hydraulic system or stuck components. Forcible start is prohibited.

Step 5: Electrical interface inspection (hydraulic system related components)

The control of the hydraulic system relies on electrical components. It is necessary to check whether the relevant interfaces are normal:

• Find the electrical connection cable of the hydraulic system (usually a black or gray cable) and check whether the connector is tightly plugged in and not loose, and the cable sheath is not damaged or exposed.；

• Check that the surface of the hydraulic system control switch (if any) is not damaged, is pressed smoothly, and has normal rebound.

3. Judgment and processing of inspection results

4. Things to note (must read for non-professionals)

• This guide is only for daily inspection and does not involve any maintenance operations (such as disassembling components, replenishing hydraulic oil, adjusting pressure, etc.). All maintenance work must be completed by professional technicians.

• During the inspection, do not knock or pry the hydraulic pipelines, joints or actuators to avoid secondary damage.

• If hydraulic oil accidentally splashes on your skin, rinse immediately with water； If it splashes into your eyes, rinse with plenty of water and seek medical attention immediately.

• Recommendations for daily inspection frequency: Check before each lifting operation, conduct a comprehensive inspection once a week, and record the inspection results (you can simply record "normal", "abnormality and location").

• When the drone is not used for a long period of time, the hydraulic system pressure needs to be released (operated by professionals) and stored in a dry, ventilated environment away from direct sunlight and high temperature and humidity.

Summary: The core of daily inspections of the 200KG lifting drone hydraulic system is to "check for hidden dangers and confirm normality." Non-professionals only need to strictly follow the steps in this guide and focus on the three key points of leakage, damage, and liquid level to complete basic safety inspections and ensure operational safety. If you have any questions about the inspection results, please contact the equipment manufacturer or professional maintenance team directly.