UUU 125 valve rocker arm has serious left-right jitter.

According to Mobie.com's inquiry, the causes of serious jitter of UUU 125 valve rocker arm may be as follows:

1. Excessive wear of the rocker shaft leads to abnormal sound of the rocker arm, and the oil pressure of the rocker arm decreases.

2. The wear loss circle of rocker arm bushing is too large, which leads to loud noise of rocker arm and excessive oil leakage on the side of bushing, which affects the oil quantity.

3. The arc surface of rocker arm head is worn, which leads to inaccurate valve foot clearance, which is difficult to eliminate during adjustment, resulting in a large abnormal sound.

4. The spherical deviation of the adjusting screw of the rocker arm is worn, which leads to inaccurate clearance of the valve foot and abnormal sound of the valve foot.

5. The adjusting bolt and thread of the rocker arm are damaged by more than two teeth, resulting in loose bolts, abnormal valve foot clearance and even serious defects.

Due to the above possible reasons, it is necessary to check one by one, such as rocker shaft, bushing, rocker head, adjusting screw, adjusting bolt and other parts, and adjust or replace them as appropriate. At the same time, it is suggested to seek the help of professional maintenance personnel to ensure accurate diagnosis and maintenance.