If you mean the windscreen rubber between the screen and screen frame then it is a straight-forward job to do. As they age the rubber often perishes in the corners leading to leaks. To remove the old rubber and screen, don't muck about, just insert a Stanley Knife (box cutter??) or other sharp thin bladed knife between the glass and rubber and just cut the old rubber away ( The handle of the knife should be against the glass on the outside. When the rubber is cut all the way round get a pal to push the glass all round the edges to release it from the rubber, while you play fielder on the outside to stop it popping out onto the bonnet (hood). A blanket on the bonnet is a good idea to protect it. Clean up the flange on the screen frame then fit the new rubber to the screen, then insert a length of string (cord) into the groove in the rubber (that will go over the frame flange) Liberally lube the frame flange and the rubber with washing up liquid (liquid soap) then with one person outside offer up the screen to the frame as accurately as possible and press firmly against the frame. Your mate on the inside then pull one end of the string into the cab at about 90 degrees to the glass, while you push from the outside where he/she is pulling, which pulls the rubber over the flange with it, work carefully all round the edge of the glass until the rubber is all pulled through. You may have to thump(!!) the screen with your palm, around the edges, to seat it properly when the screen is in. It may take a couple of attempts as sometimes the string pulls through without the rubber and you have to start again.(keep pressure on the outside opposite where the string is being pulled) It helps if the string is about as thick as the glass......its easier to do than describe!! Its also easier if 3 of you do it, one to hold the screen in place, second to push on the screen from the outside opposite the puller and the third pulling the string. Clean up - job done - happy days!!
With the glass out its an ideal time to think about a heated screen or a different tint. This side of the pond some screens were clear and some had a light tint......
Ede Bibe Lude Post mortem nulla voluptas.
Eat Drink Play, After death there is no pleasure.