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Sequence 750

The Sequence 750 has half of the watt draw of comparable sized submersible pumps. The motors are made out of aluminum for added weather resistance.

  • Out-of-pond construction - Not Submersible
  • Ports are 2" FNPT suction and 1.5" FNPT discharge.
  • Quiet Operation
  • Units are pre-wired with an 8' cord and molded 115V plug.
  • Housing is molded of high strength, glass filled polypropylene.
  • Dry run resistant mechanical seals.
  • Stainless steel hardware is standard.
  • The motors are TEFC, for excellent protection.
  • Rebuildable, industrial grade motors.
  • 3 year limited warranty!

Model: 3600SEQ12
Size: 1/8 H.P.
Head: 12' MAX
Flow: 1900 GPH @ 8'
Draw: 160 WATTS
Weight: 14 lbs
Price: $340.00

Model: 4200SEQ12
Size: 1/6 H.P.
Head: 12' MAX
Flow: 2300 GPH @ 8'
Draw: 180 WATTS
Weight: 14 lbs
Price: $352.00

Pump End Assembly

  1. Inspect all pump parts (O-ring, O-ring groove, impeller hub ID, motor shaft, etc.) and clean if necessary.
  2. Apply sealant to the bracket bore ID wall and around the seal case - follow sealant mfg. instructions. We recommend using Gasgacinch®.
  3. Press the carbon graphite seal member into the bracket while taking care not to touch or damage the carbon graphite face. Never touch or apply pressure to the carbon graphite seal face!
  4. Screw the four M-Bolts, five complete turns into the threaded holes located on the motor face.
  5. Mount the bracket to the motor by aligning the key holes over each bolt head, then rotate cock-wise which will position the small key hole slot under each bolt head. Tighten each bolt with a wrench to secure the bracket to the motor (08 - 25 lb. in.).
  6. Carefully, lubricate the seal seat elastomer OD and impeller hub ID with water. Press the seal seat into the impeller hub making certain that the ceramic is in evenly - the sealing surface should be parallel with the impeller hub.
  7. Apply clean water to the carbon-graphite and seal seat sealing surfaces. Do not use silicon lubricants or grease!
  8. Lock the shaft by placing a screwdriver blade into the shaft slot at the fan end of the motor. Thread the impeller onto the motor shaft (Insure that the small impeller washer is in place on the impeller). Thread until the washer securely contacts the shaft shoulder.
  9. Seat the large O-ring into the bracket O-ring groove.
  10. Assemble the volute onto the bracket with six P-Bolts (10-24 x 2 3/4" carriage bolts) and six flanged lock nuts. Tighten in a cross pattern (30 lb. in.).
  11. Install the drain plug and O-ring, into the volute drain hole.
  12. Before operating the Sequence® 750, allow a proper cure time for the sealant used in steps 2 and 3.

Disassembly

  1. Shut off power to the motor before servicing any pump!
  2. Unplug the power cord.
  3. Disassemble the bracket-motor assembly from the volute - six P-Bolts and six flanged lock nuts. The volute may remain attached to the plumbing to help simplify re-installation.
  4. Lock the shaft by placing a screwdriver blade into the shaft slot at the fan end of the motor. Unthread the impeller from the motor shaft - Take care not to misplace the small metal impeller washer.
  5. Remove the ceramic, with rubber boot, from the impeller hub (if you are replacing the seal).
  6. Loosen the four M-Bolts attaching the bracket to the motor, rotate the bracket counter-clock-wise until the screw heads are located in the large keyhole slots.
  7. Lift off the bracket from the motor.
  8. Remove the carbon-graphite seal assembly from the bracket by pressing it out from the motor-side of the bracket. Do not pry it out with a screwdriver from the pump cavity-side of the bracket (if you are replacing the seal)!

Maintenance

Lubrication

  • Motor - Permanently Lubricated ball bearings - no service required.
  • Rotary Seal - Requires no lubrication after assembly.
  • The pump must be drained before servicing or if stored below freezing temperatures. Periodic replacement of seals may be required due to normal carbon wear.

 

 

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