2
OPERATION
1. Pump should be installed in a suitable basin which is at least 18” in
diameter and 24” deep, in accordance with local plumbing codes.
2. When a pump is in a basin, etc. do not touch motor, pipes or water until
unit is unplugged. If your installation has water or moisture present, do
not touch wet area until all power has been turned off.
3. Pump features a 1-1/2“ female NPT discharge.
4. Pump must be placed on a hard level surface. Never place pump
directly on clay, earth or gravel surfaces.
5. A check valve must be used in the discharge line to prevent back flow
of liquid into the basin. The check valve should be a free flow valve that
will easily pass solids.
CAUTION: For best performance of check valves, when handling solids
install in a horizontal position or at an angle of no more than 45 degrees.
Do not install check valve in a vertical position as solids may settle in
valve and prevent opening on start-up.
When check valve is used, drill a 3/16” hole in discharge pipe
approximately 1” to 2” above the pump discharge and below the check
valve to prevent air locking of the pump.
6. Do not attempt to restrict the intake side of these pumps. Restricting the
intake may cause damage to the seal and may starve the pump. If you
require reduced flow rates, then place a valve on the discharge side of
the pump or if flexible vinyl tubing is used, a clamp can be used on the
tubing to restrict the flow.
7. Do not let the unit operate dry. It is designed to be cooled by pumping
fluid. You may damage the seal and the motor may fail if the pump is
allowed to run dry.
8. If the unit is going to be idle for a period of time, follow the cleaning
instructions outlined in the next section. Do not let the unit freeze in the
wintertime. This may cause cracking or distortion that may destroy the
unit.
TESTING PUMP OPERATION
NOTE: BE CERTAIN PUMP IS SECURE IN BASIN AND FLOAT MOVES
UNOBSTRUCTED WITHOUT TOUCHING THE BASIN WALLS OR PLUMBING.
1. These pumps are equipped with a float operated switch. When these
pumps are installed in a basin with a sealed cover, switch operation
cannot be observed. The sump cover usually will have a spare hole that
is plugged with a rubber plug. This plug can be removed and switch
operation can be observed.
2. Plug power cord into a grounded receptacle with voltage consistent with
pump voltage as indicated on pump nameplate.
3. Run water into basin until pump starts.
4. Be sure gate valve in discharge line is open.
5. Allow pump to operate through several on-off cycles.
6. If pump does not operate properly, consult the Troubleshooting table. If
trouble cannot be located with these steps shown, consult your pump
dealer or take pump to a Little Giant authorized service center.
MAINTENANCE
WARNING: DISCONNECT THE PUMP FROM THE POWER
SOURCE BEFORE ATTEMPTING TO SERVICE OR REMOVE ANY
COMPONENT!
1. This unit is permanently lubricated. Oiling is not required. Do
not, in any case, open the sealed portion of the unit or remove
housing screws.
2. Periodic cleaning of the pump parts will prolong the LIFE and
EFFICIENCY of the pump.
3. Remove screws that hold base to volute and clean impeller and
volute passage. Do not use strong solvents on impeller.
4. Be sure impeller turns freely after cleaning.
5. CAUTION: DO NOT REMOVE IMPELLER. THIS REQUIRES
SPECIAL TOOLS AND IS TO BE DONE ONLY BY AN
AUTHORIZED SERVICE CENTER. DO NOT REMOVE MOTOR
HOUSING COVER. WARRANTY IS VOID IF MOTOR HOUSING
COVER, IMPELLER OR SEALS HAVE BEEN REMOVED. ANY
REPAIR ON MOTOR MUST BE DONE BY AN AUTHORIZED
LITTLE GIANT SERVICE CENTER.
6. Be certain power cord is in good condition and contains no
nicks or cuts.
9.56
4.63
6.77
1-1/2” - 11-1/2 FNPT
D-N587
D-N587
3.01
11.16
1.50 Diameter Inlet
9.56
4.63
6.77
1-1/2” - 11-1/2 FNPT
D-N587
D-N587
3.01
11.16
1.50 Diameter Inlet
