When replace new metal shaft, has followed a similar developments have taken place. Extrapolated to the cause of the problem could be caused due to improper installation.
When replaced with a new metal sleeve shaft has been no similar situations occur. Therefore infer cause of the problem may be due to improper installation caused.
A similar situation has not occurred after the replacement of the new metal shaft sleeve. Therefore, the reason for the inference problem may be caused by improper installation.