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
capacitor 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.
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 diameter 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 automatically locate
seal in seal plate.
NOTICE: On models with impeller screw: Install
impeller 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.
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 separate violently off pump if adjusted
under pressure and cause property damage or
personal injury
.
Hazardous voltage.
Can shock, burn,
or cause death.
Disconnect power
before working
on pump or motor.
Pump Reassembly/Installing New Seal
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 locate properly, remove it,
place face up on bench and reclean cavity.
Ceramic seat should now locate.
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
surface or seal will leak.
10
.
Prime pump according to instructions on Page
7.