Brake Drum Assembly with leaking cylinder
There are two possible reasons why a brake wheel cylinder assembly is leaking. First, the cups may have been perforated. Second, the cylinder may have scratches that can no longer be sealed by the cups but this is very rear.
Why is there a Perforation of the Cylinder Cups
Everything has its limit, it will eventually end at a certain point of time. What you can see below are cylinder cups. The first two are the perforated and replaced ones and the second two are the new ones.
These are rubberized materials that can be stretched when pressure is applied. As these cups rub against the cylinder every time the brake is applied it will eventually end. However, the earlier service life is shortened if the cylinder has no end caps to protect the cylinder from dust, water, and mud.
When the cylinder is always dirty due to dust and muds during rainy days the cylinder will corrode and the cups will be easily perforated.
If the cylinder cups are perforated due to fine sand and the cylinder is still good then it would be easier to replace the cups.
However, if the cylinder is pitted then there is no remedy than to replace the wheel cylinder assembly.
The image below is a piston of the cylinder. If this is pitted due to dirt for a long time then it will surely happen to the cylinder also.
Thank you again for reading this simple post. I hope you took some insights that you can do it yourself. Please leave a comment and share your opinion on this subject.