STA-RITE AR204-L 3/4 HP Owner's Manual page 9

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Mechanical seal
rotating half
A-Seal removal-rotating half
Figure 5
8. Unscrew impeller from shaft (turn counterclockwise when facing it).
9. Remove seal plate from motor.
10. Using two screwdrivers, pry rotating seal half off of shaft (See Figure 5A).
11. Place seal plate face down on flat surface and tap out ceramic seat (See
Figure 5B).
12. Clean seal cavity in seal plate and clean motor shaft.
Pump Reassembly/Install New Seal
1. Ceramic seat must be clean and free of dirt, grease, dust, etc. Wet outer
edge of O-Ring with small amount of liquid detergent; press ceramic seal
into seal plate cavity firmly and squarely. Place a cardboard washer over
the polished face and use a piece of 3/4" standard pipe for pressing
purposes.
NOTICE: Be sure not to scratch or mar polished surface or seal will leak.
See Figure 5C.
2. Remount seal plate on motor.
3. Apply a small amount of liquid detergent to inside diameter of rotating half
of seal.
4. Slide rotating member, polished face first, over threaded shaft end and shaft
shoulder until rubber drive ring hits shaft shoulder (See Figure 5D).
NOTICE: Be sure not to nick or scratch polished seal face; seal will leak if
face is damaged.
5. Screw impeller onto shaft (clockwise); this will automatically locate seal in
seal plate (See Figure 5D). Replace impeller screw (Models AR207-L and
AR208-L).
6. Mount diffuser on seal plate; tighten screws.
7. Assemble motor and seal plate to volute.
8. Prime pump according to instructions on Page 7.
Mechanical seal
stationary half
Seal Plate
B-Seal removal-stationary half
3/4" socket
or pipe
Cardboard
washer
(supplied w/seal)
Polished
surface
Rubber
surface
C-Stationary half installation
9
Shaft
shoulder
Rubber drive
ring
Sealing
face
Impeller
D-Rotating half installation