Power-Flo Pumps & Systems • 877-24PUMPS • www.powerfl opumps.com
11
Pressure builds up extremely
fast, increase pressure by
“TAPPING” air nozzle. Too much
pressure will damage seal.
DO NOT
exceed 10 P.S.I.
Lower Housing Pressure Test:
If oil has been drained, fi ll to normal
level before performing pressure test.
(See Figure 4),
Loosen gland nut (3),
remove cap screws (22) and lockwashers
(11) from upper housing (19) and carfully
slide up the power cable and lay off to the
side. Remove pipe plug (4) from housing
(15).
Apply pipe sealant to pressure gauge
assembly and tighten into hole. Pressurize
lower motor housing to 10 P.S.I. Use soap
solution around the sealed areas above
the oil level and inspect joints for “air
bubbles”. For sealed areas below oil level,
leeks will seep oil. If, after five minutes,
the pressure is still holding constant, and
no “bubbles” /oil seepage is observed,
slowly bleed the pressure and remove the
gauge assembly. Replace oil. Leek must be
located and repaired if pressure does not
hold.
Seal Chamber (Double Seal Units)
-
Set pump on its side with fi ll plug (48)
downward, remove plug (48) and drain all
oil from seal chamber. Apply pipe sealant
to pressure gauge assembly and tighten
into hole in intermediate coupling (21B).
Pressurize seal chamber to 10 P.S.I. and
check for leaks.
Oil Replacement
Motor Housing:
Remover upper housing
(19), Do
NOT
remove wires. Remove pipe
plug (4) from lower housing (15).
Drain all oil (if not already done so)
from motor housing (15) 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). Check that o-ring (24) is in
place and does not need to be replaced.
Reassemble upper housing to lower.
Tighten gland nut.
Seal Chamber (Double Seal)-
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 (48) upward, and refi ll
with new oil, see “Cooling Oil” chart. Apply
pipe thread compond to threads of pipe
plug (48) and assemble to intermediate
coupling (21B).
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 cap screws (35-single
seal), or hex nut (50-double seal) and lock
washers (11) from volute (25).
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.
Do Not
store pump without
impeller in place.
Installation & Service
Upper Housing
Pressure Test
Figure 3
PFGPC - 2HP
Submersible Grinder Pumps
Lower Housing Pressure Test
Figure 4
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