Artie- DL&W,
I have a number of the Weaver 2 bay hopper cars that I applied the weights, these are the straight side cars, I believe they are 4750 cubic foot cars First remove both trucks from the car body by removing the screws, next the bottom of the car body with the hopper is removed from the upper part of the car body. Using a small flat screwdriver insert this screwdriver in the gap between the car side and the bottom of the car body and gently pull the car body upwards repeat this at all 4 corners, then the bottom is easy to remove. When you do the first corner there may be a small pointed projection by the bottom end diagonal bracing that hold the bottom of the car body to the remaining car body , if you see one there are probably three more at the other corner locations.
The roof, sides and ends with the ladders is one molded piece, there are two removable vertical pieces that are inboard of the ends with the ladders, at the bottom facing inward is a clearance slot for the truck screws. The weight required is 5 ounces plus one ounce of weight per length of the car or 13 ounces if the hopper car is 8 inches long.
One the weights are added and bonded to the car body bottom section, you can reassembly the car in the reverse procedure.
