Power-Flo Pumps & Systems • 877-24PUMPS • www.powerfl opumps.com
12
PFG 3, 5 & 7.5HP
Submersible Grinder Pumps
Place conduit box (11) on motor housing
(8) and insert capscrews (15) with washers
(16) into motor housing and torque to 16
ft/lbs.
Cable Assemblies
- Power cable, Place
one friction ring (13C), grommet (13D),
one friction ring (13C) and hex plug (13B)
into conduit box (11). Control Cable, Place
one friction ring (14C), grommet (14D),
one friction ring (14C) and hex plug (14B)
into conduit box (11). Torque hex plugs to
15 ft. lbs. to prevent leakage. See Figures
7 & 8.
Seal Plate -
Lubricate and set square
ring (24) in bottom groove of seal plate
(19). Place seal plate (19) over shaft and
onto intermediate coupling (5), being
sure square ring (24) is not twisted and
in the groove. Place two capscrews (35)
with lockwashers (38) into seal plate and
torque to 6.5 ft/lbs.
Outer Seal -
Clean and oil stationary
seal cavity in seal plate (19). Slide seal
guide tool over motor shaft. Lightly oil
(Do not use grease)
outer surface of
seal’s (34) stationary member.
Press stationary fi rmly into seal plate
(19) using a seal pusher tool. Be sure the
stationary member is in straight. Nothing
but the seal tool is to come in contact
with seal face. (See Figure 5)
IMPORTANT ! Do not hammer
on the seal pusher. It will
damage the seal face.
With seal guide tool over motor shaft,
Lightly oil
(Do not use grease)
guide,
shaft and inner surface of bellows on
rotating seal.
With lapped surface of rotating member
facing inward toward stationary, slide
rotating member over guide and onto
shaft, using seal pusher tool, until lapped
faces of stationary and rotating seal are
together. Place spring over shaft and
rotating member. Be sure it is seated on
the retainer and not cocked or resting on
bellows tail.
Impeller -
Place impeller (18) on motor
shaft, with machined step fi tting inside
the inside diameter of seal spring, by
turning clockwise while holding shaft
stationary with screwdriver.
Shredding Ring -
Install shredding ring
(27) into volute with the use of an arbor
press. Assemble throat (21) into volute
(23) with tree allen screws (22).
Volute -
Lubricate square ring (24) and
place in groove in bottom of seal plate
(19). Place volute (23) on seal plate (19)
being careful not to damage square ring
(24). Place nuts (25) with lockwashers (9)
onto studs (26) and torque evenly to 11
ft/lbs.
Cutter -
Screw radial cutter (27) onto
shaft, turning it clockwise while holding
the shaft stationary with a screwdriver.
The radial cutter (27) should be fl ush with
shredding ring (20), on suction side to
within ± .020. Place washer (28) on screw
(29), apply green Loctite on threads and
place into shaft and tighten.
Figure 5
Service
