10
Pump Reassembly/Installing 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
seat into heat sink insert firmly and squarely with finger pressure (Fig. 5).
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.
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 (Figure 3).
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.
NOTICE: Clamp knob can be located in any position around volute; if it
is moved after assembly, tighten knob while tapping around clamp to as-
sist 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 re-
move clamp. Clamp may blow off of pump if adjusted under pressure.
10. Prime pump according to instructions on Page 7.
Installing Heat Sink Insert:
1. If the heat sink insert moves or shifts during seal removal, remove and re-
place with a new insert to prevent leakage.
Removal:
1. Remove two screws holding heat sink insert to seal plate.
2. Place seal plate face down on bench and use a short length of 1/2” pipe
to push insert out of seal plate.
3. Remove “O” Ring from insert cavity in seal plate and discard.
NOTICE: Do not scratch “O” Ring seat in seal plate.
Installation:
1. Clean heat sink insert cavity in seal plate, including “O” Ring seat (step in
seal plate cavity - see Figure 7).
NOTICE: Do not scratch “O” Ring seat surface.
2. Lubricate new “O” Ring with petroleum jelly and insert into seat in seal
plate (Figure 8).
Figure 5: Press seal into heat sink in
seal plate
Figure 6: Seal Plate/Heat Sink
sectional drawing
Figure 7: Clean O-Ring Seat
Figure 8: Install O-Ring in Seal Plate
