All glass,including any type of safety glass, carries some potential of danger in handling.  For safety reasons always use protective eyewear and gloves, in a well lit area when working with glass.

Removing the Ventilating Pane:

Crank the RV window fully open to give yourself working room.  The vent assembly is secured to the triangle shaped cast metal pivot brackets by two screws on each side.  Using a suitable Phillips head screwdriver, remove these screws and free the vent assembly.

Disassembling the Vent:

Working on a flat surface, remove the four screws holding the vent together at the corners.  Working from the corner, carefully work the aluminum frame of the vinyl u-channels which surrounds the glass.  These are lightweight pieces and are bent easily.  Be careful when removing them.  Peel the vinyl u-channel off the edge of the glass.

Assembling the Vent with new Glass:

Reverse the process above.  If the aluminum frame pieces do not push on with reasonable force, check to see that the replacement glass is not thicker that that previously used.  If they are otherwise OK, try placing a small board on the backside of the aluminum and gently tapping it onto the glass with a small mallet.  Once the aluminum frame pieces are on the glass and square, replace the four frame screws.  Replace the vent assembly between the triangular pivot brackets on the window and screw it on to the same screw holes.  The top holes must always be used.  Any of the lower holes may be used.  The lowest hole gives the tightest seal.  After reassembling, we recommend re-caulking all areas on the assembly which had been caulked previously, since disassembly has broken the caulk seal.