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STEP 3: CUT THE UPPER DROP TUBE <br /> Attach the supplied band clamp to the upper tube <br /> just below the mark and ensure that it is assembled <br /> square to the tube. The clamp can be used as a <br /> guide for making a square cut. If a vise is used, <br /> clamp on the valve body casting only to avoid Band Clamp <br /> damage to the float and tubes (See Figure 3A). <br /> Carefully saw through the tube squarely, at the mark <br /> made in Step 2. Use a hacksaw with a new fine- <br /> tooth blade. Rotating the upper tube as the sawing <br /> progresses will minimize run out and ensure a <br /> square 90-degree cut. Remove the band clamp <br /> after tube is cut. <br /> CAUTION -DO NOT use a pipe or tubing cutter to <br /> cut the upper drop tube, this may damage the tube, Cut Line <br /> causing it to be out of round thereby prohibiting Figure 3B <br /> assembly of the unit. <br /> STEP 4: FILE THE UPPER DROP TUBE <br /> IMPORTANT: Remove all chips and shavings File the upper tube square, and remove any burrs or <br /> generated in steps 3 thru 5 out of the cut end of the rough edges. Make sure the cut is flat and square. <br /> tube. DO NOT remove chips and shavings by <br /> dumping thru valve body. IMPORTANT: Carefully file a good chamfer on the <br /> inside edge of the drop tube to provide a lead-in for <br /> the polypak seal and inlet tube installed in step 8. <br /> Fine half round file <br /> Figure 3A <br /> Figure 4 <br /> 66 <br />