Power-Flo Pumps & Systems • 877-24PUMPS • www.powerfl opumps.com
10
Pressure builds up extremely
fast, increase pressure by
“TAPPING” air nozzle. Too much
pressure will damage seal.
DO
NOT exceed 10 P.S.I.
Seal Chamber
- Set pump on its side with
fi ll plug (22) downward, remove plug (22)
and drain all oil from seal chamber. Aplly
pipe sealant to pressure gauge assembly
and tighten into hole in intermediate
coupling (21). Pressurize seal chamber to
10 P.S.I. and check for leaks.
Oil Replacement
Motor Housing -
Drain all oil (if not
already done so) from motor housing
and dispose of properly per Local and
Environmental Standards.
Set pump upright and refi ll with new
cooling oil, see “Cooling Oil” chart. Fill to
just above motor as an air space must
remain in the top of the motor housing to
compensate for oil expansion. Apply pipe
thread compound to threads of pipe plug
(4) then assemble to motor housing (15).
Seal Chamber -
Drain all oil (if not already
done so) from seal chamber and dispose
of properly per Local and Environmental
Standards. Place pump on its side with
plug (22) upward, and refi ll with new oil,
see “Cooling Oil” chart. Apply pipe thread
compond to threads of pipe plug (22) and
assemble to intermediate coupling (21).
DO NOT
overfill oil. Overfilling
of housing with oil can create
excessive and dangerous hydraulic
pressure which can destroy the
pump and create a hazard.
Overfilling oil voids warranty.
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
WARNING ! - Before any service
work is done, disconnect and
lock out electrical power to
pump.
Disassembly
Cutter -
Lay pump on its side and
remove the cutter retaining screw (40)
and washer (28). A small amount of heat
may be needed to loosen screw.
DO
NOT
overheat. Wedge a fl at screwdriver
between cutter and shredding ring and
remove screw. With a hammer and punch,
tap the cutter (29) counter-clockwise to
remove.
CAUTION ! - Cutter edges are
very SHARP. Cutter must be
removed before removing
volute.
Volute -
Remove hex nuts (41) from studs
(34) and remove volute (25) from pump.
Shredding Ring -
To replace or reverse
the shredding ring (27) press out using an
arbor press.
Impeller -
Remove impeller (30) by
turning counter-clockwise while holding
the motor shaft stationary with a
screwdriver.
NOTE:
Seal spring is relaxed
with impeller removed, some oil may
seep from seal cavity.
Do Not
store pump
without impeller in place.
Outer Seal -
Handle seal parts with care.
Remove seal (33) spring and rotating
member from shaft. Examine all seal
parts. Inspect contact faces for signs of
uneven wear tracks on stationary, chips
and scratches on either seal face.
DO NOT
interchange seal components, replace
the entire shaft seal (33).
Seal Plate -
Remove cap screws (32) and
washers (11) from seal plate (31). Remove
seal plate (31) and square ring (24) from
intermediate coupling (21). With fl at
screwdriver, press out seal (33) stationary
member. Inspect square ring (24) for cuts
or abrasions.
Motor -
Remove pipe plug (4) and drain
oil if not already done so. Position pump
upright using blocks or pvc pipe to avoid
resting pump on the shaft. Remove cap
screws (1) and lockwashers (2) from cable
assembly (3) and remove cable assemble
(3) by pulling straight up. Remove
retaining ring (38). Using a 1/4-20 bolt,
thread bolt into the center of the terminal
block (37) and pull straight up to remove.
Disconnect all wires, noting where each
was connected. There are numbers next
to the pins on the bottom of block, use
these for reference.
Remove cap screws (35) and lockwashers
(11) from motor housing (15). Vertically
lift motor housing (15) from intermediate
coupling (21) along with square ring (20),
replace if cut or damaged. Remove stator
bolts and carefully remove stator housing
from rotor. Pull rotor out with bearing (18)
and rotating member of inner seal.
Inspect motor winding for shorts and
check resistance values. Check rotor for
wear. If rotor or the stator windings are
defective, the complete motor must be
replaced.
Service
PFG - HH & HV 2HP
Submersible Grinder Pumps
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