Troubleshooting: Loose Wheel Bearing Nut on a Heavy Truck

Symptom: A noticeable wobbling or shaking of the wheel, accompanied by a rumbling or grinding noise, especially when turning.

Possible Cause: The wheel bearing nut (BRG NUT) may have become loose due to vibration or improper installation. This can lead to excessive play in the wheel bearing, causing the described symptoms.

Solution:

1. Safely secure the heavy truck and use appropriate lifting equipment to raise the affected wheel off the ground.

2. Remove the wheel and inspect the wheel bearing and the bearing nut.

3. If the bearing nut is loose, try tightening it to the manufacturer's specified torque using a calibrated torque wrench. Refer to the vehicle's service manual for the correct torque specifications.

4. If the bearing nut appears damaged or the threads are stripped, it should be replaced with a new one. Ensure you use the correct part number for your vehicle model (e.g., check our catalog for Dongfeng Tianlong Wheel Bearing Nut).

5. After tightening or replacing the bearing nut, re-install the wheel and lower the vehicle.

6. Test drive the vehicle at low speeds to ensure the wobbling and noise are gone. If the problem persists, further inspection of the wheel bearing itself may be necessary.

Always consult the vehicle's service manual and follow proper safety procedures when performing maintenance or repairs.