REMOVAL OF GLASS : Cutting of Urethane Adhesive Sealant
(1) PIANO WIRE METHOD
1.Apply protective tape (A) on body panel around windshield glass to protect painted surface from damage.
2.Follow the below depend on the case.
a.In case glass is reusable:
Paint matching marks on the windshield glass and body panel, positioning during installation can be easily performed.
b.In case glass is not reusable:
Skip this process.
3.Remove windshield glass upper molding.
CAUTION: Remove windshield glass upper molding left on vehicle using a pliers etc..
4.Apply protective standish cover (A) on instrument panel to protect it from damage.
5.Remove the adhesive using a piano wire.
a.Pass the piano wire (B) from passenger room to bonded area of glass using a wire pierce (A).
CAUTION: Never press piano wire excessively against edge of glass. For corner area, never insert piano wire into the mating surfaces of glass. Never damage harness around glass.
b.Tie both ends of the piano wire (B) to the wire grip (A), etc..
c.With 2 persons, one holding the piano wire inside the vehicle along with the glass and the other holding it outside the vehicle along with the gap between the body and glass, pull one grip to cut off the adhesive. NOTE:
Power cutting tool (A) and an inflatable pump bag (B) can also be used.
6.Follow the below depend on the case.
a.In case glass is reusable:
CAUTION: Never use a windshield cutter (A) if the windshield is reused. (If may scratch the glass surface.) Never damage the windshield glass and body panel.
b.In case glass is not reusable:
Using a windshield cutter (A) into the bonded area. Remove the adhesive by pulling the knife, keeping the tip parallel to the edge of glass. NOTE:
Apply soapy water around the bonded area on the body for smooth movement of windshield cutter.
7.Use suction lifter (A) or rubber suction cups, etc. to remove windshield glass from the vehicle.
CAUTION: 2 workers are required for removal in order to prevent damage.
(2) AIR KNIFE METHOD
An air knife is used to cut glued windshield sealant.
The windshield sealant is cut while the blade cuts at high frequency by air pressure.
It is composed of five blades of different sizes.
It allows access to areas without damaging exterior painting and moldings.
Working inside the vehicle, just one operation is required.
Working hours can be reduced.
(3) USE OF A CUTTER KNIFE
A cutter knife may be used to cut around the edge prior to using the windshield knife. NOTE:
Be careful not to scratch the panel.
