STA-RITE 5P6R Series Owner's Manual page 9

If shaft seal is worn or damaged, repair as follows:
Pump Disassembly/Removing Old Seal
Disconnect power to pump motor.
Be sure gate valves on suction and return piping are
closed before starting work.
Release all pressure by opening all vents before starting work.
1. Drain pump by removing drain plugs on bottom of
pump body and trap body.
2. Be sure there is no pressure in trap body; remove
cover (unscrew by turning counterclockwise).
3. Remove clamp holding pump halves together. Motor
and seal plate assembly can now be pulled away
from pump body.
4. Remove five screws and washers holding diffuser to
seal plate. Remove diffuser.
5. Remove motor canopy. Being careful not to touch ca-
pacitor terminals, loosen capacitor clamp and move
capacitor to one side.
6. Hold shaft with 7/16" open-end wrench on motor
shaft flats.
7. Unscrew impeller from shaft (turn counterclockwise
when facing it).
NOTICE: On models with impeller screw: Remove
impeller screw (left hand thread - turn clockwise)
and gasket before removing impeller. Inspect gasket
for damage, cracks, etc. Replace if damaged.
8. Pull rotating member of seal off of impeller sleeve;
clean sleeve.
9. Remove four screws holding seal plate to motor.
10. Place seal plate face down on flat surface and tap out
ceramic seat.
11. Clean seal cavity in seal plate and clean motor shaft.
Pump Reassembly/Installing New Seal
Figure 7: Press seal into
heat sink in seal plate
3. If seat still will not locate properly, place a cardboard
washer over the polished face and use a piece of 3/4"
(19mm) standard pipe for pressing purposes.
NOTICE: Be sure not to scratch or mar polished sur-
face or seal will leak.
4. Remount seal plate on motor. Tighten bolts to 60-80
inch-lbs. (69-92 kg/cm) torque.
5. Apply a small amount of liquid detergent to inside di-
ameter of rotating half of seal.
6. Slide rotating seal member, polished face last, over
impeller sleeve until rubber drive ring hits shoulder.
NOTICE: Be sure not to nick or scratch polished seal
face; seal will leak if face is damaged.
7. Screw impeller onto shaft (clockwise); this will auto-
matically locate seal in seal plate.
NOTICE: On models with impeller screw: Install im-
peller gasket and lock screw (left-hand thread - turn
counterclockwise). Torque lock screw to 50-55 inch-
lbs. (57.6-63 kg/cm).
8. Mount diffuser on seal plate; tighten screws to 10-14
inch-lbs. (11.2-16.1 kg/cm) torque.
9. Assemble motor and seal plate to volute; be sure
clamp is properly seated.
NOTICE: Clamp knob can be located in any position
around volute; if it is moved after assembly, tighten
knob while tapping around clamp to assist sealing.
Do not move clamp while pump is full of water.
Hazardous pressure. Release all pressure
from pump and piping system before working on pump
or attempting to adjust or remove clamp. Clamp may
blow off of pump if adjusted under pressure.
10. Prime pump according to instructions on Page 7.
9
1. Ceramic seat must be
clean and free of dirt,
grease, dust, etc. Wet
outer edge of rubber cup
on ceramic seat with
small amount of liquid
detergent; press ceramic
seat into seal plate firmly
and squarely with finger
pressure (Figure 7).
2. If ceramic seat will not lo-
cate properly, remove it,
place face up on bench
and reclean cavity.
Ceramic seat should now
locate.