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71 SO TOOLCT PROCEDURE BELOW, FOR 71 SO TOOL, SEE PAGE 8 71 SO TOOLCT FOR 71 SO-TOOLC, SEE PAGE 9 STEP 9C: INSERT 71 SO-TOOLCT OVER INLET TUBE To install the 71 SO-TOOLCT (sold separately) over the inlet tube, first loosen the thumb screws, so the tool can pass freely over the inlet tube flange. Align the slot on the tool with the key on the inlet tube and insert the tool down . See Figure 9C . Tip to stop dimension must be 1 -3/16" to 1 -1 /4" Loosen Figure 11 C thumb Hand tighten STEP 12C: DRILL HOLES screws Tool Slot thumb screws With the inlet tube and 71 SO-TOOLCT in place, carefully drill a 3/ 16" diameter hole in the upper tube using the �c>\. hole in the 71 SO-TOOLCT as a guide. The drill stop is rJ� ' positioned so it will bottom out against the tool after the bit has drilled through the upper drop tube. If the stop is positioned wrong either no hole will be drilled, or a through hole could potentially be drilled through the inlet tube . If no hole is drilled return to step 11 C and check the stop dimension . If a hole is drilled through the inlet tube or into the screw hole the assem - bly is not salvageable. Drill (2) more holes in the two Inlet remaining guide holes. Tube Key Figure 9C Figure 10C " STEP 10C: TIGHTEN THE 71 SO-TOOLCT Ensure that the tool seats flat against the top of the inlet tube. To prevent vertical movement of the tool during MUthrough upper tube only drilling, hand tighten the thumb screws against the up- per drop tube. See Figure 10C. STEP 11 Co PREPARE DRILL AND BIT Confirm that the stop on the 3/16" drill bit supplied Figure 12C with the 71 SO-TOOLCT is in the correct position before drilling . The stop is factory installed at a distance be- tween 1 -3/ 16 " to 1 - 1 /4" from the tip with the 71 SO- TOOLCT. If the stop is not at the correct position it must be fixed before drilling . CAUTION: If the drill stop is not in the proper loca- tion failure of a pressure decay leak test may result. 10