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Page 15BackplateDiffuser O-RingDiffuser Screws with Washers (2)MotorDif fus erScrewswithWashers (2)DiffuserSelf Sealing LeftHanded ScrewBackplateO-ringImpellerMotorMechanicalSealBackplateDif fus er O-ringFigure 6.Diffuser and Impeller Exploded ViewFigure 3.Remove the DiffuserPump Body6. Remove the motor shaft cover on the back ofthe motor by twisting the hex-head screw witha 90° crescent wrench (see Figure 2). The motorshaft will be exposed.DiffuserDiffuserO-ring7. Hold the exposed motor shaft with a ½"wrench while removing the impeller centerscrew using a #3 Phillips screwdriver (seeFigure 5).NOTE The impeller center screw is a left-hand threadedscrew, therefore turn the screw clockwise toloosen.8. Hold the motor shaft with a ½" wrench whileunscrewing the impeller from the motor shaftwith your hand.Figure 4.Figure 5.Remove the Diffuser O-ringBackplateRemove the ImpellerSelf Sealing LeftHanded ScrewImpellerMechanical SealNOTE The impeller is a right-handed thread, thereforeturn impeller counter-clockwise to unscrew.9. Inspect the impeller and diffuser for signs ofrubbing and/or damage.6.2.3 Impeller Replacement1. While holding the motor shaft with a ½"wrench, thread the impeller onto the motor shaft.Hand-tighten the impeller until it issecure. Install the impeller center screwinto the center of the impeller andtighten, using a #3 Phillips screwdriver.Do not overtighten.NOTE The impeller center screw is a left-hand threadedscrew, therefore turn the screw counter-clockwiseto tighten.