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Power-Flo Pumps & Systems • 877-24PUMPS • www.powerflopumps.com
Shaft Seal:
13. Unscrew conduit bushing (29) from
seal plate (3) and lift motor rotor, shaft,
bearing (8), rotating member of seal (6),
washer (30) and conduit bushing (29)
from seal plate (3). See Figure 3.
14. Remove seal parts (6) from shaft.
Examine all seal parts, if seal faces show
signs of wear, uneven wear pattern, chips
or scratches replace entire seal. DO NOT
interchange seal components, replace
the entire shaft seal (6). If replacing seal,
remove stationary from seal plate (3) by
prying out with flat screwdrive.
Reassembly:
IMPORTANT! - All parts must be
clean before reassembly.
Handle seal parts with extreme
care. DO NOT damage lapped
surfaces.
Shaft Seal:
1. To reassemble, clean seal cavity in seal
plate (3) and oil.
2. Press seal’s (6) stationary member
firmly into seal plate (3), use a seal tool
or pipe. Nothing should come in contact
with the seal face except the seal tool. Be
sure the stationary is in straight.
3. Place conduit bushing (29) and washer
(30) onto shaft. Press lower bearing (8)
onto shaft.
4. Place seal’s (6) retaining ring and
spring onto shaft. Lightly oil (Do not
use grease) shaft and inner surface of
bellows.
5. With lapped surface of rotating
member facing outward, slide over shaft
using a seal tool, being carefull not to
damage seal face. Make sure spring is
seated in retaining ring and spring is
lined up on rotating member and not
cocked or resting on bellows tail.
Bearing & Motor:
6. Slide rotor/shaft with bearing (8) and
seal parts (6) into seal plate (3) until
bearing seats into seal plate and tighten
conduit bushing (29) into seal plate (3).
Place stator over rotor, lining up motor
bolts with holes in seal plate (3). Insert
motor bolts and torque to 17 inch pounds.
7. On Single phase units, connect
capacitor (34) to motor wires. See Figure 5.
8. On models PF4NC2834SS, 2844SS,
2854SS, place gland nut (23), one friction
ring (24), grommet (25) and one friction
ring (24) onto cord (22) and slide cord
through hole in motor housing (4) (See
Figure 4). Make wire connections per
Figure 5.
9. On models PF4NC2824SS, 3744SS,
3734SS, 3744SS, 3754SS, 3764SS,
5024SS, 5034SS, 5044SS, 5054SS,
5064SS, place all motor leads above
motor. Place o-ring (18) on seal plate (3)
and lower motor housing (4) onto seal
plate (3).
10. Place socket head screws (17) through
seal plate into motor housing and torque
to 60 inch pounds.
Impeller & Volute:
11. Install v-gasket (16) and impeller
washer (15) over shaft, and into seal plate
(3).
12. Install impeller (2) by appling a thin
film of oil to motor shaft and slide impeller
straight onto shaft, keeping keyways lined
up. Drive key (14) into keyway.
13. Place washer (13) and impeller nut (12)
onto shaft and torque to 40 ft lbs. Rotate
impeller to check for binding.
14. Place o-ring (19) onto volute (1).
15. Lower motor housing and seal plate
assembly onto volute (1). Apply thread
locking compound to studs (9) and place
hex nuts (4) onto studs and torque to 24
ft. lbs.
Figure 3
Service
PF4NC-SS
Non-Clog Pumps
