how to check swing bearing on excavator

An excavator is an essential equipment for construction and mining sectors. It is a heavy-duty machine that requires regular maintenance and inspection to ensure optimal performance and prevent failures. One critical area that an excavator owner or operator should prioritize is the swing bearing. This component is responsible for enabling the excavator's rotating motion. In this guide, we will discuss how to check the swing bearing on an excavator to ensure that it is in good working condition.

Step 1: Stop the Excavator

Checking the swing bearing requires the operator to stop the excavator's movement. Turn off the engine, parking brake, and ensure that the excavator is in a stationary position. You should also put the excavator arm in a raised-up position, perpendicular to the ground, to avoid unnecessary pressure on the bearing.

Step 2: Inspect the Swing Bearing for Leakage

The next step is to inspect the swing bearing for any signs of leakage. The excavator's swing bearing contains a lubricant that ensures smooth rotation of the components. A leakage would reduce the amount of lubrication and cause wear and tear on the bearing components. It would help if you inspected for any stains around the swing bearing. If you notice any evidence of grease or oil leakage, the bearing may require repair or replacement.

Step 3: Check for Play or Movements

The next step is to inspect the swing bearing for any play or movements. This involves trying to move the excavator's turntable in both directions gently. If you notice any excessive movement, this could indicate wear and tear or lack of lubrication in the swing bearing. You can also use a dial indicator to measure the play in the bearing. The manual usually provides specific information on allowable tolerance levels. If the swing bearing's play is outside the manufacturer's specification, it may require reconditioning or replacement.

Step 4: Check for Abnormal Noises

The swing bearing should rotate smoothly without producing any abnormal noises. If you notice any rumbling or grinding sounds, this could indicate metal-to-metal contact or debris caught between the bearing balls or rollers. It would help if you opened the swing bearing cover to expose the bearing components for inspection.

Step 5: Consult a Professional

Inspecting the swing bearing may require specialized tools and equipment. Therefore, it is advisable to consult a professional technician or the manufacturer's authorized service personnel. They have the necessary expertise and tools to carry out detailed inspections and recommend appropriate repair and maintenance procedures.

Conclusion

In conclusion, the swing bearing is a critical component of an excavator that requires periodic inspection and maintenance. By following the steps outlined in this guide, you can check the swing bearing's condition and ensure that it is in good working order. This will help prolong the excavator's lifespan, reduce downtime, and prevent costly repairs. Remember to consult a professional if you encounter any issues or problems during the inspection process.