Waterlogged Tanks; Precharged Tank; Installing New Shaft Seal - Wayne Shallow well model Operating Instructions And Parts Manual

Operating Instructions and Parts Manual
Maintenance
(Continued)

WATERLOGGED TANKS:

CONVENTIONAL
When a tank system has an inadequate
ratio of air and water, the pump will
start and stop often and eradically.
1. Disconnect the power to the pump.
2. Open the lowest faucet in the system
to release all pressurized water in the
system.
3. Prime the pump (Priming the Shallow
Well).
4. Reconnect the power to the pump.
NOTE: As the pump refi lls the tank with
water, the air volume control supplies
the tank with the correct air to water
ratio for the system to operate. If the
air volume control is good, the pump
will shut off at the desired cut-off and
will be adjusted correctly.
WATERLOGGED TANKS: PRECHARGED
If a precharged tank becomes waterlogged,
the bladder is normally leaking or broken.
1. Test the tank by depressing the air
valve. The air valve will expel water
if the bladder is broken.
2. Replace the tank.
NOTE: Once a bladder is leaking or
broken, the bladder cannot be repaired.
The tank must be replaced.
LUBRICATION
The bearings used in the pumps are
lifetime lubricated at the factory and
require no additional lubrication.

PRECHARGED TANK

Some air is lost through the bladder in
any tank. To prevent tank failure, check
the tank precharge on a yearly basis.
1. Open a faucet nearest the tank and
allow all water to drain from the tank.
2. Measure the tank precharge at the
valve stem using a tire gauge.
3. If necessary, adjust the precharge
with an air pump 28 - 30 psi on 1/2,
3/4 and 1 HP pumps.
REMOVING OLD SHAFT SEAL
Turn disconnect
switch to "off" position.
Cap Screws
Motor
Figure 9 - Shaft Seal
1. Open a faucet nearest the tank and
allow all water to drain from the tank.
2. Remove the four cap screws holding
the pump housing (volute) to the
motor (Figure 9).
3. Separate the pump housing (volute)
from the motor to expose the diffuser
and the seal plate.
4. Remove the two cap screws and
diffuser from the seal plate to expose
the impeller.
5. Remove the small end cap on the end
of the motor opposite the impeller.
6. With a large screwdriver or adjustable
wrench, keep the shaft from rotating
and remove the impeller by hand
(standard right hand thread). Be
sure to hold onto the seal plate when
removing the impeller from the shaft.
7. Remove the seal plate.
8. Pry the rotating shaft seal member
from the impeller (Figure 10).
Rotating
Shaft Seal
Member
Figure 10 - Removing Shaft Seal and
Ceramic Seat
9. Push or pry the ceramic seat free
from the seal plate (Figure 10).
10. Remove loose particles from impeller
hub and seal plate.

INSTALLING NEW SHAFT SEAL

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
Seal Plate
Diffuser
Cap Screws
Impeller
Venturi
2.
Figure 11 - Seal Plate Replacement
Seal
3.
Plate
Impeller
Rubber
Seat Ring
4.
Ceramic
Seat
Before handling shaft
Figure 12 - Motor Shaft
seal parts wipe hands
5.
6.
7.
Pump
Housing
(Volute)
NOTE: Shaft must rotate freely and
motor end cap should be secured before
operation.
5
Shallow Well Model Systems
cardboard washer to protect pol-
ished surface when pushing against
ceramic seat with any object. Be sure
to remove cardboard washer.
Carefully slip seal plate over shaft. Do
not disturb seal position in seal plate.
The seal plate must be orientated
during assembly so the two screw 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
11). This placement should be done to
ensure proper draining and priming.
Place rotating shaft seal member in
position on impeller and press into
place. Take care not to press against
polished seal surface.
Position impeller on shaft and
tighten securely (Figure 12).
Motor
Seal Plate
Impeller
Seal
Seat
Be Clean For
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.
Carefully position pump housing
(volute) gasket over the diffuser
onto the seal plate. 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.
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.
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Screw
Holes
Motor
Shaft
Seal
Plate
Seal
Facing
Must
Proper Seal