Pump Service - STA-RITE JWPA5C Owner's Manual

Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
#5 #3
#2
#6 #4
Figure 8 – Torque Sequence

PUMP SERVICE

Pump should only be serviced by qualified personnel.
For best results, use only genuine Sta-Rite factory parts.
Be sure to prime pump (Page 7) before restarting.
Before removing trap cover:
1. STOP PUMP before proceeding.
2. CLOSE GATE VALVES in suction and discharge pipes.
3. RELEASE ALL PRESSURE from pump and piping system.
4. NEVER tighten or loosen clamp while pump is operating!
Aside from lubricating trap cover O-Ring, no lubrication or regular mainte-
nance is needed beyond reasonable care and periodic cleaning.
If shaft seal is worn or damaged, repair as follows:
Removing Old Seal:
1. Disconnect power to pump motor.
2. Drain tub and pump; disconnect unions to allow access to pump.
3. Remove six bolts holding front plate to seal plate; remove front plate.
4. Remove shaft cover or motor canopy; using screwdriver in slot on motor
end of shaft or wrench on flats of shaft extension, hold pump shaft and
unscrew impeller from shaft (turn counterclockwise). Rotating half of seal
will come off with impeller.
5. Carefully remove rotating part of seal from impeller sleeve by pulling and
turning on sealing washer and spring (Figure 3). Do not damage impeller
surface where drive ring seats and seals.
6. Carefully remove four motor throughbolts from seal plate (Figure 4);
remove seal plate and use a screwdriver to tap ceramic seat out from the
rear (Figure 5). Do not damage seal cavity in seal plate.
7. Clean cavity from which seal was removed and clean motor shaft.
Installing New Seal:
1. Ceramic seat must be clean and free of dirt, grease, dust, etc. Wet rubber
cup gasket of ceramic seat with small amount of water; press into cavity
firmly and squarely with finger pressure (Figure 6).
2. If ceramic seat will not locate properly, remove it, place face up on
bench, and reclean cavity. Ceramic seat should now locate.
3. Seal must be free of dirt, grease, grit, scratches or chips; be sure impeller
sleeve is clean. Slide seal assembly, rubber drive ring first, onto impeller
sleeve until drive ring bottoms on impeller back shroud.
4. Slip slinger over shaft; remount seal plate. Torque throughbolts to 25
inch-lbs. (29 cm-kg).
5. Screw impeller onto shaft until it seats against shaft shoulder. Work
slinger over end of impeller sleeve so it rides on sleeve (Figure 7).
#1 Start
6. Install Wear Ring on back of Front Plate. NOTICE: Teeth on Wear Ring
Here
interlock with ribs in Front Plate.
7. Remount front plate; using pattern, shown in Figure 8, torque bolts to 30
inch-lbs. (34.5 cm-kg). BE SURE to start with bolt in 3 o'clock position as
shown.
8. Reconnect unions; tighten hand tight only.
To avoid dangerous or fatal electrical shock hazard, turn OFF
power to motor before working on pump or motor.
10