Pump Disassembly - Pentair MYERS MWS5 Serie Manual De Instalación, Operación Y Repuestos

SERVICE
General
Hazardous voltage and risk of cord
damage. Can shock, burn, or kill. Before removing the
pump from the basin for service, always disconnect electrical
power to the pump and the control switch. Do not lift the
pump by the power cord. See the "Cord Lift Warning" below.
After removing the basin cover and the necessary discharge
piping, lift the pump out of the basin.
Place the pump in an area where it can be cleaned
thoroughly. Remove all scale and deposits on the pump.
Submerge the complete pump in a disinfectant solution
(chlorine bleach) for at least one hour before disassembling
the pump.
The pump motor housing contains a special lubricating oil
which should be kept clean and free of water at all times.
NOTICE: Whenever the motor housing is being removed for
service, remove oil and replace it with new oil at reassembly.
Use only oil listed in parts list in this manual. When filling with
new oil, DO NOT overfill. Allow about 7/8" (22mm) air space
from top of boss in housing for expansion of oil when the
pump is operating.

Pump Disassembly

Impeller and Seal Replacement
A. Impeller removal (See the correct pump disassembly
drawing, "Model Number Cross Reference Chart" , Page 4):
1. Remove the oil fill plug and turn the pump upside
down to drain oil.
2. Remove the capscrews holding the upper motor
housing to the lower motor housing; lift off the upper
motor housing and remove the motor lead wires from
the connector to detach upper housing from assembly.
The lead wires are fitted with quick connect terminals
for this purpose.
3. Remove the capscrews holding the lower motor
housing to the volute; lift off the lower motor housing.
4. Hold the rotor shaft assembly and unscrew the
impeller by turning it counter-clockwise. Remove
impeller and clean it.
If no more service is needed, reverse instructions above
to reassemble the pump. Reattach the motor lead wires
as shown in Figure 1, fill with clean dielectric oil (Part
No. U197-8A), check the oil level and replace fill plug. Oil
should cover the motor windings.
Risk of electrical shock.
Can burn or kill.
Do not lift pump by
power cord.
CORD LIFT WARNING
Green Wire
(connected between
the two tallest
dividers)
View A-A
Figure 1
B. Shaft seal replacement:
1. Follow the instructions to remove the impeller, above.
2. Remove the stator capscrews and the spacers (if
applicable). Lift off the stator.
3. Remove the seal's ceramic seat from the shaft and tap
the body of the seal out of the lower motor housing.
4. Clean the seal cavity thoroughly before installing the
new seal. NOTICE: Make sure that the seal faces
are clean; do not scratch or damage the new seal
face during seal replacement. Apply a non-hardening
sealant sparingly to the outside edge of seal body
before installing the seal in the lower motor housing.
5. Press the new seal body into position in the lower
housing cavity.
6. Press the ceramic seat onto the motor shaft. The
impeller will pull it into position.
7. Reassemble the stator and tighten the stator
capscrews. If your pump has a capacitor (Key. No. 14),
be sure the spacer is under it to keep it away from the
oil in the motor.
Risk of electrical shock. Can burn or
kill. Discharge capacitor before handling it. Electrical
shock can burn or kill.
8. Reassemble the impeller and the pump (reverse
instructions 1 through 4 in section A).
9. Install new capacitor.
10. Reattach the motor lead wires as shown in Figure 1.
11. Fill with clean dielectric oil (Part No. U197-8A), check
the oil level and replace the oil fill plug.
1. Attempting to lift or support pump by power cord
can damage cord and cord connections.
2. Cord may pull apart, exposing bare wires with
possibility of fire or electrical shock.
3. Lifting or supporting pump by power cord will
void warranty.
4. Use lifting ring or handle on top of pump for
all lifting/lowering of pump. Disconnect power
to pump before doing any work on pump or
attempting to remove pump from sump.
3 3
Either Black Wire
Short Divider
Either Black Wire
409 0893