Installation:
1) Completely remove the old sight glass including metal rings and rubber gaskets. Ensure all brake fluids are discharged and cleaned from the reservoir
2) Place the rubber seal in the hole of the sight glass
3) Gently push the sight glass into the hole
4) Cover your face with a soft cloth or towel to prevent damage and carefully tapping it into place with a hammer Make sure the face is flat and the same as the font face