902 PINE ST NORTH SOUND BEHAVIORAL HEALTH TREATMENT CENTER 2025-11-04

SAFETY PRECAUTIONS 1. Disconnect and lock out the electrical supply to Figure 1 • the motor before working on the unit. SEAL CHAMBER- hurl 2. Lift the pump from the pit with a steel cable or chain attached to the lifting handle at the top of STATIONARY SEAL RING the pump. DO NOT USE THE POWER ROTATING SEAL RING CABLE FOR THIS PURPOSE. SPRING • .. LUBRICATION SPRING RETAINER n• RETAINING RING r.Double sealed prelubricated ball bearings require no END PLATE-' �\ \'1 further lubrication. STATIONARY SEAL RING i ROTATING SEAL RING CLEANING OR REPLACEMENT OF SPRING • !• IMPELLER AND GRINDER ASSEMBLY SPRING RETAINER •' n• .. ... 1. With the pump standing vertically,remove the RETAINING RING mn .1 screws holding the seal chamber(31)to the case(1). 2. Carefully lift the motor assembly out of the WIcase. 3. Lay the unit on its side in V-Blocks with the Tandem Mechanical Seal impeller(2)overhanging. I0922 Assembly 4. Remove the impeller retaining screw(26)and slide the cutter(91)off the motor shaft. 5. Tap the impeller with a soft hammer to DISASSEMBLY-TANDEM SEAL loosen.Remove impeller from shaft (Refer to Figure 1) using opposed pry bars. Remove impeller 1. Remove the retaining ring from the shaft and key(32). remove the spring retainer and spring. 6. Disassemble the suction cover(9)from the case 2. Slide the rotating seal ring off the shaft. TAKE and remove the shredder ring(92). CARE NOT TO SCORE THE SHAFT. 7. Scrape off any deposits on the impeller,cutter 3. Remove the round head machine screws and shredder ring and inspect it for breaks, holding the end plate(11)to the seal chamber. cracks,or wear. 4. Press the stationary seal ring out of the end 8. To reassemble the impeller on the shaft, plate. insert the impeller key in the shaft keyway. 5. Remove the retaining ring from the shaft and 9. Coat exposed area of shaft with anti-seize remove the spring retainer and spring. compound. Align the impeller keyway with the 6. Slide the rotating seal ring off the shaft.TAKE impeller key and carefully push the CARE NOT TO SCORE THE SHAFT. impeller on to the shaft,tapping gently with 7. Remove the upper stationary seal ring by a soft hammer. pulling with hooked picks behind the outside of 10. Align the roll pins on the cutter with the holes the seal ring. If this method fails,break the seal on the impeller and slide the cutter onto ring with a small chisel and remove the pieces. the shaft so that it contacts the impeller. 8. The mounting seats of both end plate and 11. When the impeller is seated on the shaft, seal chamber stationary seal rings and the place washer(25)over impeller retaining shaft must be cleaned of any adhering particles screw and install and tighten the screw. or deposits before a replacement seal can be Rotate the impeller by hand to ensure that it installed. turn freely. ASSEMBLY-TANDEM SEAL 12. Place the shredder ring in the suction cover by (Refer to Figure 1) aligning the poll pin on the shredder ring with 1. Check the replacement seal to ensure that it is the matching hole in the suction cover and the same type,shaft size and length as the assembly. original seal.UPPER SEAL COMPONENTS 13. Place the motor assembly into the case and AND LOWER SEAL COMPONENTS insert and tighten the screws. MUST NOT BE INTERCHANGED. REPLACEMENT OF MECHANICAL SEALS 2. Apply a thin coating of lubricating oil or Disassemble case and remove impeller as described glycerin to the outside surface of the in CLEANING OR REPLACEMENT OF rubber cup of the stationary seal ring. TAKE IMPELLER." Drain oil from seal chamber by CARE NOT TO MAR OR DAMAGE THE removing the two pipe plugs and placing unit on its SEAL FACES. side with drain holes facing down. EM-2516-2 WEIL