First Check whether there is oil seal dirt, impurity and sediment; Take a look at the place of rubber oil seal have cracked.

Second check oil seal specifications (inside diameter and height) and the axis of a hole with size is in accordance with the requirements; Take a look at whether sufficient width, width is insufficient can cut blanket pad or paper pad supplementary.

Three check the inside of the spring if there is oil elastic, the tightness of rewinding is appropriate, such as spring is too long, too loose, insufficient, should shorten appropriately length; Take a look at oil seal rubber whether ageing.

Fourth check shaft block or a hole whether there are wounds, rust or other mechanical damage; Take a look at whether oil seal there is distortion.

Oil seal when installation should be uniform thrusting around at the same time, it is strictly prohibited to unilateral force percussion. Installation skeleton rubber oil seal, oil seal have spring circle side direction oil, oil seal using temperature not allowed more than 95 ℃. With the high speed shaft with oil seal, should choose high speed double mouth or high-speed flexible type oil seal.