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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 <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, <br />causing it to be out of round thereby prohibiting <br />assembly of the unit. <br />IMPORTANT: Remove all chips and shavings <br />generated in steps 3 thru 5 out of the cut end of the <br />tube. DO NOT remove chips and shavings by <br />dumping thru valve body. <br />Figure 3A <br />66 <br />Figure 3B <br />STEP 4: FILE THE UPPER DROP TUBE <br />File the upper tube square, and remove any burrs or <br />rough edges. Make sure the cut is flat and square. <br />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 />Figure 4 <br />Fine half round file <br />