Blue Angel Pumps SBS50BOOST - Manual (Page 4)

4
Operating Instructions and Parts Manual SBS50 Boost
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 5).
9. Push or pry the ceramic seat free
from the seal plate (Figure 5).
10. 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.
Operation (Continued) 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 6). 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 7).
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.
Figure 6 - Seal Plate Replacement
Screw
Holes
Motor
Shaft
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Figure 5 - Removing Shaft Seal and
Ceramic Seat
Seal
Plate
Rubber
Seat Ring
Ceramic
Seat
Rotating
Shaft Seal
Member
Impeller
Figure 7 - Motor Shaft
Seal Plate
Seal Plate
Seal Seat
Motor
Impeller
Seal Facing Must Be
Clean for Proper Seal