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OPW Installation, Operation, and Maintenance Manual, Page 60 <br />STEP 15: DIMPLE REMAINING HOLES <br />Loosen the other two knobs on the 71SO-TOOL and <br />remove the tool from the inlet tube. Remove any <br />chips or burrs from the drilling operation. Dimple the <br />next (2) holes as done in Step 13. Make sure the <br />assembly is on a solid surface when punching. After <br />punching, remove any chips that may have fallen <br />into the inlet tube screw hole. <br />Align punch with <br />drilled hole <br />Figure 15 <br />STEP 16: ASSEMBLE OTHER SCREWS <br />Apply black moly grease to screws and tighten the <br />other (2) screws into inlet tube with a screwdriver as <br />done in Step 14. Use only the taptite screws that <br />are supplied with the unit. Seating torque is 20 in - <br />lbs min. to 35 in -lbs max. Do not over tighten. <br />STEP 17: APPLY GREASE TO LOWER O-RING <br />AND BODY THREADS <br />Apply black moly grease to the lower tube o -ring and <br />body threads as shown. Make sure coverage is <br />completely around the o -ring. Install o -ring in groove <br />just above threads. <br />Figure 17 <br />Executive Order VR -1 02-K <br />STEP 18: LOWER TUBE ASSEMBLY <br />If a vise is used, clamp on the valve body casting <br />only to avoid damage to the float and tubes. Thread <br />the lower tube onto the valve booty until the lower <br />tube bottoms out on valve body. Tube can be <br />tightened by hand or with a strap wrench. If a strap <br />wrench is used try to position it on the threaded <br />insert portion of the lower tube to prevent damaging <br />the tube. <br />Threaded insert <br />Figure 18 <br />Note: Before installing the valve in the tank, a <br />pressure test can be performed on the valve to <br />check for vapor tightness. Seal off both ends of the <br />tube with inflatable plumber's plugs. Apply a <br />maximum 10" W.C. (1/3 PSI) air pressure. If <br />pressure does not hold and a leak can be located <br />with soap solution, do not install the valve. Send the <br />valve back to OPW for warranty evaluation. <br />Caution: Do not over -pressurize. Excess pressure <br />can damage the valve. <br />STEP 19: CUT LOWER TUBE <br />Measuring from the underside of the inlet tube <br />flame, mark the overall length of the drop tube a <br />distance of (B) minus 6". Determine dimension (B) <br />from the measurements taken in Step 1, Figure 1 <br />(Top of the Face Seal Adapter below the drain valve <br />outlet in the spill container to the bottom of the tank). <br />Saw off the excess tube at a 45 -degree angle or per <br />local codes or requirements and file off any sharp <br />burrs (Refer to Figure 24). Optional: Install the OPW <br />Tank Bottom Protector on the lower tube (Refer to <br />Installation instructions supplied with the Tank <br />Bottom Protector). <br />IMPORTANT: Remove all chips and shavings out of <br />the cut end of the tube. DO NOT remove chips and <br />shavings by dumping through valve body. <br />OPW 71 SO Overfill Prevention Valve Page 9 <br />