Help topics here and videos on YouTube conflict with the installation process in the AD shop manual as well as what was done in the 1960s and I'd be interested to know what is behind the change.
Specifically, the shop manual tells you to apply masking tape around the perimeter of the outside and inside and then says:
Apply a continuous 3/16" bead of 3M "Weatherstrip Adhesive" along the outside rabbet pinchweld, completely around the windshield opening. Fig 5--which clearly shows the sealer filling the outer part of the space between the weatherstrip and the cab metal.
Then the explanation of installing the glass into the weatherstrip piece and the cord pulling process is provided and:
After the assembly is in position, seal the weatherstrip to the glass and in the opening using 3M "Weatherstrip Adhesive" in a sealing gun
(a) seal between outer lip of rubber weatherstrip and glass completely around the opening
(b) seal under the outer lip of rubber weatherstrip where it rests on the body metal completely around the opening
(c) seal under inner pinchweld lip of rubber channel completely around the opening
(d) remove any excess "adhesive" by using oleum spirits sparingly.
What happened? I see where these guys on YouTube are sealing the glass to the weatherstrip after the windshield is installed. Some of them don't apply the sealant to the outside rabbet but apply to the gasket. Some of them apply the sealant to the pinchweld slot in the gasket. None of them go back and seal the outer lip where that rubber rests on the body. Why? This was always done in the past and that was because this rubber doesn't seal against the cab, water will enter around the perimeter and will sit there, and natural capillary action will draw water up behind the rubber strip. That rabbet/ledge angles back where water won't drain well from it. I'm curious. Why isn't anyone sealing like the manual instructed? Thoughts? Ideas?
