Blue Angel Pumps SBS100 - Manual (Page 6)

Maintenance
(Continued)
2. Remove the four cap screws holding
the pump housing (volute) to the
motor (Figure 8).
3. Separate the pump housing
(volute) from the motor to expose
the diffuser and the seal plate.
4. Remove the two cap screws and dif-
fuser 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 9).
9. Push or pry the ceramic seat free
from the seal plate (Figure 9).
10. Remove loose particles from
impeller hub and seal plate.
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 posi-
tioned 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.
6
SBS50, SBS75, and SBS100 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 card-
board washer.
2. Carefully slip seal plate over shaft.
Do not disturb seal position in seal
plate. The seal plate must be orien-
tated 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 10). This place-
ment should be done to ensure prop-
er 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 11).
Seal
Plate
Seal
Seat
Figure 11 - Motor Shaft
Figure 10 - Seal Plate Replacement
Screw Holes
Motor
Shaft
Motor
Impeller
Seal
Plate
Seal Facing Must
Be Clean For
Proper Seal
Figure 9 - Removing Shaft Seal &
Ceramic Seat
Seal
Plate
Ceramic
Seat
Rotating
Shaft Seal
Member
Rubber
Seat Ring
Impeller
Cap
Screws
Figure 8 - Shaft Seal
Seal
Plate
Diffuser
Pump
Housing
(Volute)
Impeller
Motor
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