3. Install the inspection slot by placing a mark 1 ½-inches up from the bottom. Make an additional mark 7-
½-inches up from the bottom.
4. Cut a 1-inch wide slot from the 1 ½-inch mark to the 7-½-inch mark. The top and bottom slots are
rounded, but this is not required.
The purpose of the slot is to view the spring when compressed under
the 25-pound weight.
Fabricate the 25-lb weight as follows:
1. From 1/8-inch thick aluminum sheet metal, cut one piece 24-inches by 11-inches and two circulate pieces
7 5/8-inches in diameter.
2. From a 3/8-inch diameter aluminum rod, cut one piece 7 5/8-inches in length.