Problem:

Install a new brake cylinder/ clutch master cylinder and Connect the outlet pipe, then Add DOT3 brake liquid to push the rod.

But the brake cylinder/ clutch cylinder is hard to continue output liquid - NOK

Root Cause:

Residual Air in bore inside & outlet pipe will hinder the piston moving and brake liquid flow easy and smooth.

And without enough pressure, it’s not easy get rid of the Residual Air in bore inside and pipe.

Solution: