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STEP 3: CUT THE UPPER DROP TUBE coverage is completely around the tube as shown in <br /> Carefully saw through the tube squarely, at the mark Fig. 5. <br /> made in Step 2. Use a hacksaw with a new fine- <br /> tooth blade. Rotating the upper tube as the sawing STEP 6: INSTALL INLET / <br /> progresses will minimize run out and ensure a TUBE / <br /> square 90-degree cut. A piece of paper, taped Install o-ring in the o-ring <br /> square with the tube or a hose clamp can be used groove of inlet tube(DO <br /> as guides for making a square cut. NOT USE GREASE). <br /> CAUTION -DO NOT use a pipe or tubing cutter to Insert the inlet tube into <br /> cut the upper drop tube, this may damage the tube, the upper tube until it <br /> causing it to be out of round thereby prohibiting seats against the flange <br /> assembly of the unit. on the upper inlet tube. ' Install O-Ring <br /> In Groove <br /> STEP 7: DRILL HOLES Figure 6 <br /> With the inlet tube in place, carefully drill <br /> (3) 1/8"diameter pilot holes through the drop tube <br /> and inlet tube at three locations at 120 degree <br /> intervals around the tube, 1 inch below the flange. <br /> Using the pilot holes, drill (3)5/16"dia. holes <br /> through the tubes. Remove the burrs from the <br /> drilling operation from the inside of the drop tube <br /> assembly with a fine half round file. <br /> IMPORTANT:A 5/16"drill bit must be used. Do not <br /> substitute any other size drill bit. <br /> Cut Line <br /> } <br /> Figure 3 <br /> i <br /> STEP 4: FILE THE DROP TUBE <br /> File the upper tube square <br /> and remove any burrs or <br /> rough edges. Make sure the <br /> cut is flat and square. <br /> IMPORTANT: Carefully file a Figure 7 <br /> good chamfer on the inside <br /> of the drop tube to provide a <br /> lead-in for the o-ring and inlet `ry STEP 8: ASSEMBLE <br /> tube to be installed in step 6. t AND SEAL CLINCH <br /> Caution: Failure to properly Figure 4 STUDS \ Apply Sealant <br /> apply and cure sealant Loosely assemble the <br /> may result in a failure of a three(3)clinch studs, <br /> pressure decay leak test. lock washers, and nuts /! j \ <br /> in holes. Do not tighten I , �_ tom{} <br /> STEP 5: APPLY SEALANT —� at this time. Mix up a ` j <br /> Prepare sealant by small amount of <br /> thoroughly mixing 1/3 of �% sealant. Generously <br /> each packet together until �% apply sealant <br /> color is uniform. underneath each clinch <br /> Generously apply sealant to stud head, each nut, <br /> the inside diameter of the Figure 5 and on the outside of <br /> upper drop tube. Make sure the tube around the <br /> Figure 8 <br /> holes. <br /> 56 <br />