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Professional Knowledge on Automobile Control Arm Maintenance
 
The control arm is a crucial component of a vehicle's suspension system. Below is some professional knowledge regarding its maintenance:
 
- Inspection Interval: It is recommended to inspect the control arm during each regular vehicle maintenance service, typically every 5,000 to 10,000 kilometers driven or every six months to one year.
- Inspection Methods:
- Visual Inspection: Carefully check the control arm surface for obvious damages such as cracks, deformation, and rust. Inspect the ball joint for looseness, wear, or oil leakage, and check the connection points between the control arm and other components for damage or looseness.
- Measurement Inspection: Use precision measuring tools like a vernier caliper to measure the key dimensions of the control arm, and compare them with the original factory specifications to determine if there is deformation or dimensional deviation.
- Tap Inspection: Gently tap different parts of the control arm and listen for sound changes. An abnormal sound, such as a dull or hoarse one, may indicate internal cracks.
- Bushing Replacement: Under normal circumstances, the control arm bushings need to be replaced after approximately 100,000 kilometers of driving, but the specific timing depends on actual usage conditions. If damage is found in advance, replacement should be done immediately. Theoretically, the control arm bushings can be replaced individually, but many 4S shops only offer the service of replacing the entire control arm assembly due to profit considerations or inventory issues.
- Daily Usage Precautions: Avoid driving the vehicle on harsh road conditions such as potholes and rough terrain for extended periods to reduce the impact force on the control arm; avoid aggressive driving behaviors like sudden acceleration and sudden braking to lower the load on the control arm; regularly clean the vehicle chassis to keep the control arm clean and prevent corrosion caused by sand, sewage, etc.