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OPW Installation, Operation, and Maintenance Manual, Page 54 Executive Order VR-102-1 <br /> STEP 11: PREPARE DRILL AND BIT STEP 13: DIMPLE FIRST HOLE <br /> Confirm that the stop on the 3/16"drill bit supplied Unthread one knob completely from the tool. <br /> with the 71 SO-TOOL is in the correct position before Remove any chips or burrs from the drilling <br /> drilling. The stop is factory installed at a distance operation. Place the assembly on a solid surface <br /> between 2"to 2-1/16"from the tip. If the stop is not keeping the other two knobs in place. Using the <br /> at the correct position it must be fixed before drilling. punch supplied with the 71 SO-TOOL align the tip of <br /> the punch with the drilled hole and dimple the upper <br /> Caution: If the drill stop is not in the proper drop tube by striking the punch with a hammer until <br /> location failure of a pressure decay leak test may drop tube is formed into countersunk hole in inlet <br /> result. tube. After punching, remove any chips that may <br /> have fallen into the inlet tube screw hole. <br /> 0 <br /> Tip to stopdimension <br /> must be 2 to 2-1/16 inch Align punch withdrilled hole <br /> Figure 11 <br /> STEP 12: DRILL HOLES <br /> With the inlet tube and 71SO-TOOL in place, <br /> carefully drill a 3/16"diameter hole in the upper tube <br /> using the drill bushing in the knob as a guide. The <br /> drill stop is positioned so it will bottom out against <br /> the knob after the bit has drilled through the upper <br /> drop tube. If the stop is positioned wrong either no <br /> hole will be drilled,or a through hole could <br /> potentially be drilled through the inlet tube. If no Figure 13 <br /> hole is drilled return to step 11 and check the stop <br /> dimension. If a hole is drilled through the inlet tube STEP 14: ASSEMBLE FIRST SCREW <br /> the assembly is not salvageable. Drill(2) more Ensure that the drop tube was formed into the <br /> holes in the two remaining knobs. countersunk screw hole as shown in Figure 14 if not <br /> return to step 13. Apply black moly grease to screw <br /> and tighten first screw into inlet tube with a <br /> screwdriver. Use only the taptite screws that are <br /> supplied with the unit. Seating torque is 20 in-lbs <br /> min. to 35 in-lbs max. Screw head should be flush <br /> with the drop tube. Do not over tighten. <br /> Drill thru upper <br /> tube only <br /> Figure 12 <br /> Ensure drop tube is formed into <br /> countersunk hole <br /> Figure 14 <br /> OPW 71SO Overfill Prevention Valve Page 8 <br />