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0 0 <br /> PLLD Site Prep and Installation Guide Modifying Pumps to Disable Functional Elements and Relief Valves <br /> l Syphon housing <br /> assembly <br /> Replace 0-rings Replace gasket <br /> l � <br /> 0 <br /> Pump <br /> discharge <br /> �� Remove head <br /> relief valve <br /> Bottom view <br /> of Syphon housing <br /> wctwar�e� � <br /> Figure 4-5. Locating Relief Valve on Tokheim Pumps <br /> BENNETT PUMPS <br /> The PLLD SwiftCheck Valve eliminates the need for the pump's check valve.You must remove the pump check valve as <br /> part of the PLLD system installation on Bennett pumps.Bennett pumps may have a siphon valve assembly or suspension <br /> valve assembly. <br /> 1. Disconnect any tubing from the siphon valve assembly,if present. <br /> 2. Remove the siphon or suspension valve assembly from the pump discharge head.The assembly is located at the top <br /> of the pump on the side opposite the discharge ports. <br /> 3. Unscrew retainer plug from valve assembly.Remove spring,check valve,internal O-ring and discard [Figure 4-6]. (It <br /> may be necessary to tap the valve housing to dislodge the check valve.) <br /> 4. Replace external O-ring if necessary and install retainer plug back into valve assembly. <br /> 5. Reinstall siphon or suspension valve assembly in pump discharge head,being sure to apply a suitable sealing <br /> compound to the threads. <br /> f � . <br /> Failure to properly reseal the Siphon or Suspension Valve assembly may <br /> result in product leakage,which could create serious environmental and <br /> �4 safety hazards. <br /> Fire,explosion,or ground contamination could occur. <br /> Carefully reassemble and reseal the Siphon or Suspension Valve assembly, <br /> following the procedures described in this manual. <br /> 4-5 <br />