Product Manual

Maintenance
(Continued)
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.
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).
9. Push or pry the ceramic seat free
from the seal plate (Figure 10).
10. Remove loose particles from
impeller hub and seal plate.
Shallow Well Jet Pump
Operating Instructions and Parts Manual
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.
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.
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 12).
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 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.
Seal
Plate
Seal
Seat
Figure 12 - Motor Shaft
Figure 11 - Seal Plate Replacement
Screw Holes
Motor
Shaft
Motor
Impeller
Seal
Plate
Seal Facing Must
Be Clean For
Proper Seal
Figure 10 - Removing Shaft Seal &
Ceramic Seat
Seal
Plate
Ceramic
Seat
Rotating
Shaft Seal
Member
Rubber
Seat Ring
Impeller
Cap
Screws
Figure 9 - Shaft Seal
Seal
Plate
Diffuser
Pump
Housing
(Volute)
Impeller
Motor
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