Hayward W3SP2303VSP 1.65 THP VS Pump Family - Owners Manual - Page 23

Shaft Seal Change Instructions When servicing electrical equipment, basic safety precautions should always be observed including the following. Failure to follow instructions may result in injury. ! WARNING - To reduce risk of injury, do not permit children to use this product. • Disconnect all electrical power service to pump before beginning shaft seal replacement. • Only qualified personnel should attempt rotary seal replacement. Contact your local authorized Hayward Dealer or service center if you have any questions. • Refer to page 23 for pump component locations. Exercise extreme care in handling both the rotating and the stationary sections of the two-part replacement seal. Foreign matter or improper handling will easily scratch the graphite and ceramic sealing surfaces. Removing the Motor Assembly 1. Remove the four (4) 5/16" x 1.75" hex head bolts, which hold the motor assembly to the pump/strainer housing, using a 1/2" wrench or socket. 2. Slide the motor assembly out of the pump/strainer housing, exposing the diffuser. Remove the three (3) diffuser screws and pull the diffuser off of the seal plate to expose the impeller. Removing the Impeller 3. To prevent the motor shaft from turning, secure using a 5/16" hex wrench on the motor shaft through the fan shroud on the back of the pump. 4. Remove the impeller by rotating counterclockwise. Removing the Ceramic Seat 5. Remove the spring seal assembly and seal plate from the motor by removing the four (4) 3/8" x 1" bolts that secure it to the motor, using a 9/16" wrench or socket. 6. Press the ceramic seat with rubber cup out of the seal plate. If tight, use a small screwdriver to tap seal out. STOP - Clean all recesses & parts to be reassembled. Inspect gaskets & replace if necessary. Seal Installation 7. Clean and lightly lubricate the motor shaft and seal recesses in the seal plate with a dilute solution of nongranulated liquid-type soap. Gently wipe the polished face of the ceramic seal with a soft cotton cloth. Lubricate the rubber cup on the ceramic seat and press it firmly into the recess of the seal plate, with the polished ceramic surface facing out. 8. Reassemble the motor to the seal plate using the four (4) 3/8" x 1" bolts. Torque the bolts to 100 in-lbs. 9. Gently wipe the black, polished surface of the spring seal assembly with a soft cotton cloth. 10. Press the spring seal assembly onto the motor shaft, with the black polished surface facing the ceramic seat. Replacing the Impeller and Diffuser 11. Screw the impeller onto the motor shaft in a clockwise direction. Tighten snugly by holding motor shaft with wrench as noted in step #3. 12. Place the diffuser over the impeller and onto the seal plate, aligning the three (3) pins with the matching holes in the seal plate. Note: Flat side of diffuser rim will face up. Replace the three (3) diffuser screws and torque to 20 in-lbs. Replacing the Motor Assembly 13. Slide the motor assembly, with the diffuser in place, into pump/strainer housing, being careful not to disturb the diffuser gasket. 14. Fasten assembly to pump/strainer housing using the four (4) 5/16" x 1.75" bolts. (Be sure housing gasket is in place, and lubricated. Replace if damaged). Tighten bolts alternately and evenly to 185 inch-pounds. Looking at the back of the pump, start with the top right, move diagonal to the bottom left, then up to the top left and last across to the bottom right. 22 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS