4
CAUTION:
Never work on
pump with power on. Make sure
that the ground wire is securely
connected and that the unit is
properly grounded in accordance
with local codes.
CAUTION: Severe injury may
result from accidental contact
with moving cutter. Keep
clothing, hands and feet away
from cutter any time power is
connected to the pump.
Replacing Cutter Parts:
If necessary to replace grinder
parts because of wear or to inspect
for clogging:
1. Close gate valve at pump
discharge.
2. Turn off circuit breaker.
CAUTION: Never work on
pump with the power on.
Be sure ground wire from
pump is connected to a good
ground such as a water pipe.
3. Remove pump from sump.
4. Unscrew screws (5) and
remove stationary cutter ring
assembly (4). Radial cutter
(3) can be screwed off the
common shaft by lightly
tapping cutter and unscrewing
it counterclockwise while
holding end of common shaft
with a screwdriver in slot at
cutter end of shaft.
5. Radial cutter (3) and stationary
cutter (4) can now be inspected
for wear and be replaced if
necessary.
Stator Boot and Rotor
Inspection and/or Replacement:
If necessary to inspect or replace
the stator boot and rotor,
the following procedure should
be followed:
1. Unscrew socket head screws
(12) and remove volute case
(1). Note: Turning common
shaft clockwise while
removing volute case can ease
removal.
2. Radial cutter (3) and
stationary cutter (4) can be
inspected for wear and
replaced if necessary.
3. Stator boot and rotor are now
exposed to check for any
obstructions in or wear of
stator boot.
4. If necessary to replace stator
boot (21), remove screws
(9) and retainer ring (8) from
volute (1). Stator boot (21)
can now be lifted out from the
volute recess. To replace
pump rotor (22), use a
suitable size center punch and
remove lower roll pin (6) from
common shaft. Pump rotor
(22) can now slide off
common shaft.
6. If problems occur, check power
source. Make sure a separate
supply line is available. Verify
voltage supply.
7. Check resistance of windings.
(See Chart) If not within
guidelines, return pump to
authorized Hydromatic service
or repair center.
As the motors are oil filled, no
lubrication or other maintenance
is required. Pump should be
checked every quarter for
corrosion and wear.
Pump
Maintenance
Pump
Operations
Starting the Pump:
WARNING: Severe injury may
result from accidental contact
with moving cutter. Keep
clothing, hands and feet away
from cutter any time power is
connected to the pump.
To start the pump, perform the
following steps in order:
1. Grinder pump is single phase;
no rotation check is necessary.
2. Run water into sump until
motor is covered.
3. Open gate valve in discharge
line.
4. Turn pump on. If pump runs
and sump liquid does not
pump down, stop pump and
close discharge gate valve.
Then lift pump until sealing
flange is open to vent off
trapped air. Lower pump,
open discharge valve, and
start the pump again.
CAUTION:
Positive displacement pump
is designed to operate at
minimum 5 GPM capacity.
Running pump at shut-off
condition or with gate valve
closed can result in damage
to the pumping stator boot
and rotor.
5. Level control should be set so
that pump turns off when level
is about 2 inches above inlet
of pump suction and turns on
when level is about
2 inches above motor.
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