After purchasing the parts of the excavator, we need to install them ourselves, so we will use the pin removal tool. When using the Pin Removal Tool of the excavator, in order to ensure safety and efficiency, the following key points should be noted:
1. Safety protection
- Wear protective gear: Wear protective gloves, goggles and steel-toed shoes during operation to avoid hydraulic oil splashing, metal fragments splashing or accidental slipping of the tool to cause injury.
- Ensure the safety of the working area: Clear surrounding obstacles and make sure that personnel are away from high-pressure tools and possible ejection paths of the pin shaft.
2. Tool inspection
- Tool integrity: Check whether the hydraulic hose, joints and tool body have cracks, leaks or wear before use to avoid rupture under high pressure.
- Model matching: Confirm that the tool specifications match the pin shaft size (diameter, length) to prevent the tool from overloading or damaging the pin shaft.
3. Lubrication and pretreatment
- Lubricate the pin shaft: Spray penetrating lubricant (such as WD-40) on the joint between the pin shaft and the hole in advance, and let it stand for 15-30 minutes to loosen rust.
- Clean up foreign matter: remove dirt and gravel around the pin to prevent impurities from entering the tool or increasing friction.
4. Correct operation method
- Align the center line: strictly align the tool hydraulic push rod with the center of the pin to avoid deviation causing the tool to slip or damage the pin thread.
- Progressive pressurization: slowly increase the hydraulic pressure. If the pin does not move, pressurize and release alternately (pulse operation) to avoid instantaneous overpressure.
- Auxiliary knocking: If the pin is stuck, use a copper hammer to tap the end of the pin or the tool fixture to assist in loosening with vibration (steel hammers are prohibited to prevent deformation).
5. Force control
- Do not exceed the rated pressure of the tool: refer to the maximum working pressure in the tool manual, and do not overload to prevent damage to the hydraulic system.
- Monitor the hydraulic system: If you hear abnormal noise or the oil temperature is too high, stop the operation immediately and check the cause.
6. Handling of special situations
- Stubborn pins: If they cannot be disassembled for a long time, consider the thermal expansion and contraction method (heating the metal around the pin hole to avoid directly burning the pin) or replace a larger tonnage tool.
- Broken pin treatment: If the pin is broken, use a special drilling tool to remove the remaining part to avoid damage to the hole wall caused by forced pressure.
7. Maintenance and storage
- Tool cleaning: Wipe the oil on the surface of the hydraulic tool after use to prevent rust.
- Regular maintenance: Check the status of the seal and hydraulic oil, and replace aging parts in time.
- Proper storage: Place the tool in a dry environment to avoid heavy pressure or bumps.
8. Other precautions
- Follow the manufacturer's guidelines: Different brands/models of tools may have special operating requirements, and they must be operated strictly according to the instructions.
- Teamwork: When complex disassembly requires the cooperation of multiple people, clearly communicate the instructions to avoid misoperation.
