To determine whether the FA107-YVPEJ11-4P-58.12-M1 reducer bearing seal is installed correctly, the core is to look at the sealing performance, operating status and installation accuracy.。

1. Sealing inspection

‌Static inspection‌: After installation, first observe whether the contact surface between the seal, the shaft and the bearing seat fits evenly without distortion or flanging. Gently pull the sealing lip with your hand, and it should rebound, indicating that the spring holding force is normal.

‌Dynamic verification‌: Run the reducer without load and observe whether there is oil leakage at the shaft end. If the oil stain spreads along the shaft diameter, it may be that the sealing lip is worn or the spring has fallen off; if the oil leakage on the joint surface is linear, check whether the bolts are loose or the sealing gasket is aged.

2. Operating status monitoring

‌Abnormal noise and vibration‌: If there is a hissing or periodic friction sound at the shaft end during operation, it may be caused by improper installation of the seal, resulting in dry friction. Use a vibration meter to detect the vibration value. If it exceeds the equipment manual standard (such as ≤4.5mm/s), check whether the seal is misaligned.

‌Temperature rise control‌: Use an infrared thermometer to measure the temperature of the sealing lip. If the temperature rise is significantly higher than normal working conditions (such as exceeding the ambient temperature of 35°C), the seal may be installed too tightly or the lubrication is insufficient.

3. Installation accuracy review

‌Coaxiality Test‌: Use a dial indicator to measure the coaxiality between the input shaft and the motor shaft. The error should be ≤0.1mm (rigid coupling) or ≤0.2mm (elastic coupling). If the tolerance is exceeded, the seal may be deformed due to uneven stress during installation.

‌Levelness and fit‌: Use a level to measure the levelness of the reducer base. The error should be ≤0.2mm/m. If the installation surface is uneven, the seal may be unevenly stressed and cause leakage.

4. Common problems and solutions

‌Seal damage‌: If the sealing lip is found to be worn on one side, flanged or the spring falls off, the machine needs to be stopped immediately and replaced.

‌Improper installation‌: If the seal is installed without lubricating it or pressing it with special tools, it may cause the lip to tear or the spring to fail.