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FranA n ��e.L���- 0�r,dlQ..rr Sej�-e5 <br /> tJ <br /> Maintenance Inspecting/Verifying 95% Level (Without <br /> The 708-590 Series Overfill Prevention Valve has no Removing from Tank) <br /> periodic maintenance requirements. FOR DIMENSIONS"A" &"B": Refer to the"installation <br /> However, if the drop tube and valve assembly is removed record sheet"or re-measure and re-calculate per figure 1. <br /> from the tank(for inspection or service). inspect the <br /> drop tube seal for wearldamage(Figure 1E). Replace if 1. Measure Dimension "T' (Figure 18) <br /> necessary. <br /> (Upper drop tube flange to <br /> edge of upper tube adapter) <br /> ,.Ap 2. Verify using the calculation below <br /> (Drop tube seal surface to <br /> it w„ <br /> /1 bottom of tank) <br /> -(Subtract) <br /> Drop Tube Gasket Installed (95%Volume from tank chart) <br /> (note orientation) <br /> _ -(Subtract) <br /> 4.5' (114mm} (95%shutoff level offset) <br /> Figure 16:Inspect Gasket - (Equals) <br /> Additionally, if the upper or lower drop tube is <br /> unthreaded/removed from the OPV, the O-ring(s) should <br /> be replaced (Figure 17), Same value as "T' <br /> indicates correct installation <br /> Inspect 0-ring <br /> Measure <br /> ITS <br /> �L <br /> l <br /> I 4191 <br /> z <br /> (114 mm) <br /> Inspect O-ringer l <br /> Figure IT,Inpect O-Rings Figure ?8:Dimension Verification After Installation <br /> 9 <br />