The half shaft oil seal leaks the lubricating oil of the rear axle to the brake drum, which causes the brake shoe friction disc oil stain, the friction coefficient of the friction disc decreases, the brake efficiency decreases, and the driving safety is affected.

The causes of oil leakage in semi shaft oil seal are as follows:

There is too much lubricating oil in the rear axle.

2. The stomata of the rear bridge are blocked.

(3) the oil seal of the Mercedes Benz parts in the north of Baotou is deteriorating or unproperly installed.

The Baotou North Benz parts and oil seal seat hole with too loose, and half shaft groove wear, pits etc..

The loose bearing of the Mercedes Benz parts in the north of Baotou or the loose bearing of the differential is loose, which makes the semi shaft jitter and influence the sealing performance of the oil seal.