4
2. Remove the volute and
cutters per the instrutions
listed under the Pump Disas-
sembly, Inspection, Reassem-
bly section in this manual.
3. To remove the impeller, secure
the shaft by threading the
radial cutter onto the shaft and
holding it with a pair of pliers.
Hold a wood block against the
impeller vane and tap it with a
hammer until it spins off.
4. Using a pair of snap ring
pliers, remove the snap
ring that secures the lower
seal. Remove the lower seal
rotating elements by sliding
the spring off the shaft. Then
using two screwdrivers, slide
the carbon assembly off by
prying on the retaining ring.
5. Loosen and remove the cap
screws that hold on the seal
housing, then re move the seal
housing. Using a socket that
will fit onto the back of the
seal, tap the sta tionary seal
assembly out of the
seal housing.
6. Using a pair of snap ring
pliers, remove the snap ring
that secures the up per seal.
Remove the spring retainer
and spring from the shaft, and
2 3450 208 1 1.30 5.08 6.35
2 3450 230 1 1.57 8.00 9.57
2 3450 200 3 2.86 2.86 2.86
2 3450 230 3 3.31 3.31 3.31
2 3450 460 3 13.25 13.25 13.25
2 3450 575 3 28.2 28.2 28.2
hp RPM VOLT PHASE BLACK TO BLACK RED
WHITE TO RED TO WHITE
WINDING RE SIS TANCE IN OHMS
MAXIMUM AMP & WINDING RESISTANCE VALUES
SINGLE PHASE THREE PHASE
BLACK - COMMON BLACK - L
1
WHITE - MAIN WHITE - L
2
RED - START RED - L
3
6. If problems occur, check
power source.
Make sure a separate supply
line is available.
Verify voltage supply.
7. Check resistance of
windings. If not within
guidelines, return pump to
authorized factory service
center.
As the motors are oil lled, no
lubrication or other maintenance
is required. Pump should be
checked every quarter for
corrosion and wear.
Pump Maintenance
Pump Disassembly, Inspection,
Reassembly:
1. Close gate valve at pump
discharge.
2. Turn off circuit break er.
3. Remove pump from sump.
4. Unscrew cap screws and
remove the volute from the
pump. Note: under certain
circumstances it may be
necessary to remove the
discharge piping.
5. Remove the axial and radial
cutters from the shaft and
inspect for excessive wear
or damage. If the axial cutter
is damaged or is excessively
worn, flip the axial cutter to
the unworn side and reattach
to the radial cutter.
6. Inspect the stationary cutter
for wear or damage. If the
cutter requires removal,
loosen the machine screw in
cutter retainer and remove
cutter retainer and slide
the cutter out of the volute.
If cutter is damaged or worn,
reinstall on the opposite side,
making sure to snug (DO
NOT OVERTIGHTEN) the
Allen head screw. It is good
practice to add a light coat of
removable locking adhesive to
the Allen screw.
7. Inspect the volute O-ring
for damage. If cracked or
torn, replace with the proper
Hydromatic
®
part.
8. To reassemble the pump, place
the cutters on the splined
shaft and orient the cutters
so that the axial cutter blades
fall between the impeller
vanes. Hold tension on the
cutters and replace the volute
and cap screws, making sure
the O-ring is placed in the
proper position. Evenly torque
the cap screws.
Replacing Seals on Dual Seal
HPG200 Model:
1. Drain the oil in the seal
chamber by removing the
drain plug on the side of the
pump. If it con tains water,
the lower seal has failed and
should be replaced. The motor
hous ing should be drained and
the upper seal replaced if the
lower seal has failed, since
foreign material in the seal
chamber may have dam aged
the upper seal.
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