Reason
When replacing the oil seal and reinstalling the oil seal, use a sheath to protect the oil seal lip; redesign and manufacture the oil seal installation tool; use fine sandpaper to polish the shaft end chamfer , apply grease and install carefully;
Ensure lubrication; ensure clean lubricating oil and strengthen cleaning of the pipeline system; in order to prevent dust from invading the lip, add a dust-proof device; pay attention to cleaning during assembly and remove mis-coating paint