Hayward SP1800 Serie Manual Del Usuario página 4

F) Noisy pump - Check for
1. Air leak in suction causing rumbling in pump.
2. Cavitation due to restricted or undersized suction line and unrestricted discharge lines.
Correct suction condition or throttle discharge lines, if practical.
3. Vibration due to improper mounting, etc.
4. Foreign matter in pump housing.
5. Motor bearings made unserviceable by wear, rust, or continual overheating.
GENERAL : Exercise extreme care handling and installing the new seal and seat assembly. The lapped and
polished surfaces may easily be damaged by dirt or scratching. For safety, all service must be performed with
power shut off.
REMOVING THE MOTOR ASSEMBLY :
1. Remove the (4) 3/8" x 2" hex head bolts, which hold the motor assembly to the pump/strainer housing.
Side the motor assembly out of the pump/strainer housing, exposing the diffuser. Pull the dif-fuser off the
seal plate, exposing the impeller. (The diffuser may remain in the pump/strainer housing. To remove, pull
it straight out of the strainer housing).
REMOVING THE IMPELLER :
2. To hold motor shaft from turning (for American made motors), carefully slide a 7/16 wrench between the
capacitor and the protector switch, and rotate the impeller so the wrench fits over the (2) flats on motor
shaft. Or use a screwdriver in the motor shaft (for European made motors). Rotate the impeller counter-
clockwise and remove. The spring portion of the seal assembly is now exposed. Note carefully the position
of the spring seal, and remove it.
REMOVING THE CERAMIC SEAT :
3. Remove the (4) bolts holding the seal plate to the motor and remove the seal plate. Note the notch on the
top of the plate and the mating lug on the motor mounting bracket.
4. Press the ceramic seat with o-ring out of the seal plate. If tight, use a small screwdriver to tap seat out.
5. Clean all recesses and parts to be reassembled. Inspect gaskets and replace if necessary.
SEAL INSTALLATION :
6. Clean & slightly lubricate the impeller hub and seal recess in the seal plate with silicone or Vaseline.
Gently wipe the black, polished surface of the spring seal assembly with a clean, soft cotton cloth. Press
the spring seal assembly into the impeller hub - black polished surface facing away from the impeller
Gently wipe the face polished of the ceramic seat with a soft, cotton cloth. Lubricate the o-ring on the
ceramic seat and press if firmly and evenly into the recess in the seal plate - polished side facing out.
7. Place the seal plate onto the motor mounting bracket aligning the positioning lug and guide.
REPLACING THE IMPELLER :
8. Screw the impeller onto the motor shaft in a clockwise direction. Tighten snugly by holding motor shaft
with wrench or screwdriver.
9. For 3 HP motor 1 drop of glue will avoid unscrewing of the impeller if rotating counter clockwise (glue must
be compatible S Steel + Brass).
REPLACING THE MOTOR ASSEMBLY :
10. Side the motor assembly, in place, into pump/strainer housing, being careful not to dislodge the diffuser
fastens assembly to housing using the (4) 3/8" x 2" bolts. (Be sure housing gasket is in place). Tighten alter-
nately and evenly.
SEAL CHANGE INSTRUCTIONS
4