What oil rubber will not deteriorate in the automobile brake pump?
That leather case is for dust proof. When braking, the brake pad and brake hub friction, a friction, there will be very fine, very fine iron powder, like dust so fine
If the iron powder into the brake pump, so that the internal surface of the sub pump is not smooth, it will easily lead to leakage of oil pump, resulting in sub pump scrapped. It will take time and effort and money.
