Wayne CWS100 Operating Instructions And Parts Manual Download Page 7

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Maintenance

(Continued)

PRE-CHARGED TANK

Some air is lost through the bladder in
any tank. To prevent tank failure, check
the tank pre-charge on a yearly basis.

1. Disconnect power to the pump
2. Open a faucet nearest the tank and

allow all water to drain from the
tank.

3. Measure the tank pre-charge at the

valve stem using a tire gauge.

4. If necessary, adjust the pre-charge

with an air pump 28 - 30 psi on 1/2,
3/4 and 1 HP pumps.

LUBRICATION

The bearing used in the pumps are
lifetime lubricated at the factory and
require no additional lubrication.

REMOVING OLD SHAFT SEAL

Turn

disconnect

switch to “off”

position.

1. Disconnect power to the pump
2. Open a faucet nearest the tank and

allow all water to drain from the
tank.

3. Remove the four cap screws holding

the pump housing (volute) to the
motor (Figure 13).

4. Separate the pump housing (volute)

from the motor to expose the
diffuser and the seal plate.

5. Remove the two cap screws and

diffuser from the seal plate to
expose the impeller.

6. Remove the small end cap on the

end of the motor opposite the
impeller.

7. With a large screwdriver or

adjustable wrench, keep the shaft
from rotating and remove the
impeller with hand (standard right
hand thread). Be sure to hold
onto the cast iron seal plate when
removing the impeller from the
shaft.

8. Remove the seal plate.
9. Pry the rotating shaft seal member

from the impeller (Figure 14).

10. Push or pry the ceramic seat free

from the seal plate (Figure 14).

11.Remove loose particles from impeller

hub and seal plate.

INSTALLING NEW SHAFT SEAL

Before

handling

shaft seal parts wipe

hands clean. Dirt or grease can damage
the seal.

1. Wet the inside of the seal cavity

on seal plate and the rubber cup
enclosing the new ceramic seat
with cooking oil. Be careful not to
scratch the ceramic surface of the
seal seat and push seat enclosed in
rubber into seal cavity on seal plate.
Use a cardboard washer to protect
polished surface when pushing
against ceramic seat with any object.
Be sure to remove cardboard washer.

2. Carefully slip seal plate over shaft

so as not to disturb seal position in
seal plate. The seal plate must be
orientated during assembly so that
the two holes are on a horizontal
line across the motor shaft and the
(4) locating pins on the back of the
seal plate line up with the tabs on
the motor housing (Figure 15). This
placement should be done to ensure
proper draining and priming.

3. Place rotating shaft seal member in

position on impeller and press into
place. Take care not to press against
polished seal surface.

4. Position impeller on shaft and

tighten securely (Figure 16).

5. Secure diffuser to seal plate

using the two cap screws. Be sure
the screws are orientated on a
horizontal line as described in Step
2.

6. Carefully position pump housing

(volute) gasket over the diffuser
onto the seal plate. In all convertible
applications the seal ring must also
be positioned on the diffuser. In all
shallow well applications care must
be taken that the o-ring is clean and
properly positioned on the venturi.
Cleaning and positioning makes a
good seal inside the diffuser when
assembled.

7. Assemble the pump housing

(volute) to the motor using the
four cap screws. Be sure the pump
housing (volute) gasket is positioned
correctly and tighten the screws
securely.

NOTE

: Shaft must rotate freely and

motor end cap should be secured before
operation.

Operating Instructions & Parts Manual

CWS50, CWS75 and CWS100

Figure 13 - Convertible Well Pump

Figure 14 - Removing Shaft Seal and
Ceramic Seat

Figure 16 - Motor Shaft

Figure 15 - Seal Plate Replacement

Cap
Screws