Waterway SMF-115 Owner's Manual - Pump Disassembly

PUMP DISASSEMBLY

PUMP REASSEMBLY / SEAL REPLACEMENT (FIGURE 4)

All moving parts are located in rear sub-assembly of this pump.

Tools required:

  • 1/2 inch open end wrench

  • 9/16 inch open end wrench

  • Flat and Phillips head screwdrivers

To remove and repair the motor sub-assembly perform the 

following procedures.

1.  Turn off the pump circuit breaker at the main panel.

2.  Drain the pump by removing the drain plugs.

3.  Remove the 6 bolts that hold the main pump body (strainer pot/  

  volute) to the rear sub-assembly.

4.   GENTLY pull the two pump halves apart, removing the rear sub-   

 assembly.

5.  Remove the diffuser.

6.  Hold the impeller securely in place and remove the impeller lock   

  screw by using a Phillips head screwdriver. The screw is a left-   

  handed thread and loosens in a clockwise direction.

7.   Remove the shaft cap located at the back of the motor and hold the  

  shaft secure with a flat-head screwdriver (Century) or 7/16 inch    

  open-end wrench (Franklin) .

8.   To unscrew the impeller from the shaft, twist the impeller counter  

 clockwise.

9.   Remove the four bolts from the seal plate to the motor, using a 9/16  

  inch wrench.

10.  Place the seal plate face down on a flat surface and tap out the    

  carbon/spring seal.

11.  Clean the seal plate, seal housing, and motor shaft.

1.  When installing the replacement ceramic/carbon seal, use silicone  

  sealant on the metal portion, before pressing into the seal plate.

2.   Before installing the ceramic section of the seal into the impeller,  

  be sure the impeller is clean. Use a light density soap and water to  

  clean the seal. Press the seal into the impeller with your thumbs   

  and wipe off the ceramic and carbon faces with a clean cloth.

3.   Remount the seal plate to the motor.

4.   Screw the impeller onto the motor shaft.

5.   Screw in the impeller lock screw (counter-clockwise to tighten).

6.   Remount the diffuser onto the seal plate.

7.   Grease the diffuser O-ring.

8.   Assemble the motor sub-assembly to the strainer pot-pump body.  

  DO NOT tighten down any of the bolts until all 6 bolts are in place  

  and finger tight.

9.   Fill the pump with water.

10.  Reinstall the pump lid by turning clockwise until hand tight (DO   

 NOT over tighten with tools).

11.  Prime the system; see Priming the Pump.

CAUTION: Be sure not to scratch or mar the polished seal faces. Seal will leak if faces are damaged.

CAUTION: The polished and lapped faces of the seal could be damaged if not handled with care.

Face Plate

Motor Shaft

Hex

Bolts

Gasket

Screw

Diffuser

Assembly

O-Ring

Impeller

Pump Seal

FIGURE 4

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