Unscrew the window from from inside the RV using a screwdriver. Have the assistant outside the RV hold the window so it doesn't fall and break.
Remove the inside frame of the window.
Take the putty knife and scrape off the old caulking and sealant on the outside of the window. Remove the window from the frame. Put new putty tape inside the opening for the window.
Place the frame of the new window into position and line it up and screw the frame into place. Have the assistant hold the new window in place.
Put a 1/3 inch of caulk around the window. Allow the caulking to dry for a day.
