3
Starting The Pump:
To start the pump, perform the
following steps in order:
1. If pump is 3 phase, the rotation
of the impeller must first be
checked. Lift pump from
sump, lay it down, and quickly
turn pump on and then off.
The impeller should turn
counterclockwise when viewed
from the suction. If rotation is
wrong, turn off main breaker
and interchange any two line
leads to motor to correct rotation.
If pump is piped-in permanently
and inlet cannot be observed,
rotation will have to be
checked by pump operation
described later.
If 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.
If pump is piped in permanently,
it may be necessary to break
union at pump discharge to
clear air.
5. If pump is 3 phase, piped-in
permanently, and still does not
operate properly after venting,
rotation is wrong and can be
reversed by interchanging any
two line leads.
6. Level controls should be set so
that pump turns off when level
is about 2 inches above inlet
and turns on when level is
about 2 inches above motor.
CAUTION: Be sure ground
wire is connected to good
ground such as a water pipe.
This is important for safety
Pump
Operations
hammer to loosen.
Disassemble radial cutter (22)
and axial cutter (17) from the
impeller (25) by removing
socket head cap screws (23).
8. Clean all parts thoroughly
before proceeding with assembly,
replace impeller (25), axial
cutter (17) and radial cutter
(22) and secure together with
socket head cap screws (23).
Make sure impeller key (21) is
in place between shaft and
impeller (25).
9. Replace cutter ring (24) and
cutter ring retainer (15).
It may be necessary to loosen
hex head cap screws (12) in
pump case (13) and tap with a
hammer to get proper
clearance on O.D. of radial
cutter (22).
10.Plug pump into power and
operate for a few seconds only
to be sure parts are not rubbing.
Replacing Seals:
1. Remove pipe plug (10) from
the top of the housing and two
pipe plugs (10) from the side.
The lower pipe plug drains the
seal housing while the other
drains the motor housing.
Check for water in the oil
drained from motor chamber.
If there is some water in this
oil, the pump must be
completely dismantled and the
stator dried out or replaced if
the resistance to ground is less
than 500,000 ohms after
drying. A hypot check of 1,500
volts for 230 volt motors and
2,000 volts for 460 volt motors
should be performed.
2. Remove cutters, impeller and
pump parts as described above
under “Replacing Grinder Parts.”
3. Remove socket head cap screw
Replacing Grinder Parts:
If necessary to replace grinder
parts because of wear or to inspect
for clogging, refer to page 8.
1. Close gate valve at
pump discharge.
2. Turn off circuit breaker.
CAUTION: Never work on
pump with 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 cap screws (16)
and remove cutter ring
retainer (15).
5. Unscrew hex head cap screws
(12) and remove volute case
(13). Cutter ring (24) can now
be removed from volute (13).
6. Radial cutter (22) and axial
cutter (17) are now exposed. If
checking for clogging, these
parts can now be cleaned
without removing them from
the shaft.
7. If necessary to replace cutters,
remove cap screw (20), washer
(19), and radial cutter (22)
from shaft.
Radial cutter (22) and impeller
(25) are slip fitted onto shaft. If
necessary, pry at two opposite
points on back of impeller (25)
while tapping with a plastic
Pump
Maintenance