Jandy FHPM FloPro Series Installation And Operation Manual
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Contents
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Page 16 FloPro Series Pumps Installation and Operation ManualBackplateScrews (2)DiffuserImpellerMechanical SealDiffuser O-RingBackplate O-ringSelf Sealing Left Hand ScrewFigure 10. Diffuser and Impeller Exploded ViewFigure 9. Remove the ImpellerImpellerSelf Sealing Left Hand ScrewBackplateMechanicalSeal6. If necessary, remove any debris in the inlet andoutlet of the impeller.7. Remove the motor shaft cover on the back of themotor by twisting the hex-head screw with a 90°crescent wrench. (See Figure 7.) The motor shaftwill be exposed.8. Hold the exposed motor shaft with a ½" wrenchand remove the impeller center screw using a No.2 Phillips screwdriver. Turn the left-hand-threadedscrew clockwise to loosen it. See Figure 9.CAUTIONVERY IMPORTANT! Grasp the lower portion ofthe seal (opposite the carbon face) when installingthe seal or it will be damaged.NOTE To assist assembly, only use water or a soapsolution as a lubricant. Any other lubricant willdestroy the seal after a short period of time.NOTE Excercise great care to keep the seal andmating parts clean.2. While holding the motor shaft with a ½" wrench,thread the impeller onto the motor shaft. Hand-tighten the impeller until it is secure. Installthe impeller center screw into the center of theimpeller and tighten, using a No. 2 Phillipsscrewdriver. Do not overtighten. Turn the left-hand-threaded impeller screw counter-clockwiseto tighten it.3. Replace the motor shaft cover by inserting thecover tabs into the slots and rotating the cover 90ºclockwise.4. Replace the diffuser over the impeller, using careto insert alignment pins into the correct holes. Thealignment pins in the diffuser allow the diffuser tobe inserted only one (1) way.Figure 11. Mechanical SealCarbon Seal Surface• Ceramic Face Seal• Backplate Seal• Carbon Face/ SpringSide of Seal• Impeller Side of theMechanical Seal9. Hold the motor shaft with a ½" wrench whileunscrewing the impeller from the motor shaft withyour hand. Turn the right-hand-threaded impellercounter-clockwise to unscrew it.10. Inspect the impeller and diffuser for signs ofrubbing and/or damage. See Figure 10.6.2.3 Impeller ReplacementWARNINGTo avoid the risk of property damage, severe personalinjury, or death, turn off the pump and switch off thecircuit breaker to the pump motor before beginningthis procedure.1. Press the carbon face seal half (seeFigure 11) on the motor shaft using a twistingmotion. Make sure the carbon surface is facingtoward the ceramic ring in the backplate. |
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