Power-Flo Pumps & Systems • 877-24PUMPS • www.powerfl opumps.com
15
Cooling Oil
Recommended Supplier/Grade
BP
Enerpar SE100
Conoco
Pale Paraffin 22
Mobile
D.T.E. Oil Light
Shell Canada
Transformer-10
Texaco
Diala-Oil-AX
Disassembly
Impeller & Volute -
Disconnect power.
Remove hex nuts (16) and vertically lift
motor housing and seal plate assembly
from volute (35). Clean out volute (35) if
necessary. Inspect gasket (34) and replace
if cut or damaged. Clean and examine
impeller (30), for pitting or wear and
replace if required. To remove impeller
(30), remove cap screw (33), lockwasher
(10) and washer (32). With a wheel puller,
pull impeller straight off shaft and remove
square key. To remove wear ring (31), split it
and remove, being carefull not to damage
volute.
Moisture Probes -
Drain oil from seal
chamber, if not already done. Remove cap
screws (9) and lifting handle (10). Set unit
upside down on blocks to avoid damaging
cables. Remove socket head cap screws
(25) and lift seal plate (24), with seal’s (19)
stationary, vertically from bearing bracket
(15),
do not
damage seal. Check moisture
sensor probes (39) for damage, replace by
removing screws (40) and disconnecting
wires (38). Then remove probes (39) from
bearing bracket (15).
Diaphragm -
with seal plate (24) removed,
examine diaphragm (23) for ruptures or
crackes. Replace diaphragm by removing
capscrews (45) and plate (44). Clean vent
holes in seal plate (24).
Shaft Seal -
Remove outboard rotating
member of seal (19), spring and inboard
rotating member from shaft. Examine all
seal parts.
Inspect seal for signs of uneven wear
pattern on stationary members, chips and
scratches on either seal face.
DO NOT
interchange seal components, replace
the entire shaft seal (19)
. If replacing
seal, remove stationary by prying out
with flat screwdrive.
Motor and Bearings -
Remove volute,
impeller, seal plate and seal as previously
stated and drain oil from motor housing
(3). Position unit upright, using blocks
to avoid resting unit on shaft. Remove
cap screws (6) o-ring (5) and conduit box
assembly (4) from motor housing (3). Note
connections and then remove cable lead
wires from motor lead wires and moisture
& temperature sensor wires from control
cable by removing connectors. Remove
cap screws (12) and vertically lift the
motor housing (3) from bearing bracket
(15). Replace square ring (14) if damaged
or cut. Remove the upper motor bolts and
lift upper end bell from motor (1). Remove
wave washer. Remove upper bearing (2)
with a wheel puller if damaged or worn.
Vertically lift stator (1) from rotor/shaft.
Inspect windings for shorts and resistance.
Test the temperature sensors by checking
for continuity between the black and
white wires. If defective contact factory
or motor service station. Pull motor rotor/
shaft with bearing (13) from bearing
bracket (15). Remove bearing (13) with a
wheel puller if worn or damaged. If rotor
or stator windings are defective, replace
the complete motor.
IMPORTANT! - All parts must be
clean before reassembly.
Reassembly
Bearings -
Replace bearings, being
careful not to damage the rotor or shaft. If
equipped, fi ll notch should face the rotor
core for both upper and lower bearings.
Apply adhesive compound to the shaft
and press bearing (13) onto shaft, position
squarely onto the shaft applying force
to the inner race of bearing only, until
bearing seats on shoulder of the shaft.
In the same manner, assemble upper
bearing (2) to shaft.
Motor -
Slide rotor with bearing (13) into
bearing bracket (15) until bearing seats on
the bottom. Position motor housing and
stator into pilot, install wave washers in
upper end bell.
IMPORTANT! Special wave washers in
upper motor housing are required to
compensate for shaft expansion. These
washers must be properly reinstalled to
give the required constant down force on
the motor shaft.
Position upper motor end bell aligning
holes and thread cap screws into bearing
bracket (15) and torque to 16 ft./lbs.
Place all motor leads above the motor.
Position square ring (14) on bearing
bracket (15) and lower housing (3) over
motor and into pilot, aligning handle
so that it is parallel to motor end bell
reliefs. Apply thread locking compound
to threads on cap screws (12) and install
with nuts (16) and torque to 24 ft./lbs.
Handle seal parts with extreme
care. DO NOT damage lapped
surfaces.
Seal/Diaphragm -
(See Figure 3) Clean
and oil seal cavities in bearing bracket
(15) and seal Plate (24). Lightly oil
(Do not
use grease)
outer surface of inboard and
outboard stationary members of seal (19).
Press inboard stationary member fi rmly
into bearing bracket (15) and outboard
stationary into seal plate (24), using a seal
pusher tool. Nothing but the seal pusher
tool is to come in contact with seal face.
Service
PF6NC & PF6NC-H
Submersible Non-Clog Pumps
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