Little Giant 6EC Series Owner's Manual page 10

MAINTENANCE
Periodic Service
MAINTENANCE
Risk of severe injury or death by electrical shock, high temperatures, or
pressurized fluids.
• Always unplug the pump power cord in addition to removing the fuse or shutting off the circuit
breaker before working on the pump or switch.
• Let pump cool for a minimum of 2 hours before attempting to service. Submersible pumps contain
oil that becomes pressurized and hot under normal operating conditions.
Risk of damage to pump or other equipment.
• This unit is permanently lubricated. Oiling is not required. Do not open the sealed portion of the unit
or remove housing screws.
• Do not remove the motor housing cover.
• Do not remove the impeller
• Warranty is void if the motor housing cover, impeller, or seals have been removed. Repairs on the
motor or impeller require special tools.
Periodic Service
Inspect and test the pump system condition and operation every three months—more frequently in heavy
use applications.
Let pump cool for a minimum of 2 hours before attempting to service. Submersible pumps contain oil that
becomes pressurized and hot under normal operating conditions.
1. Check the power cords and electrical outlet for damage or corrosion. The power cord on these units
cannot be replaced. In case of damage, the whole unit must be replaced.
2. Remove all debris (gravel, sand, floating debris, etc.) from the basin.
3. Check the pump system components (basin, pump, switch, etc.) for any build-up (sludge, sediment,
minerals, etc.) that would inhibit functionality of the components. If significant, remove build-up or
replace affected components.
4. Confirm that all flexible coupling hose clamps are fully engaged with plumbing and fully tightened.
5. Test operation of the pump system. Refer to
6. While the pump is running, make sure a stream of water is escaping from the air bleed hole. If not, clear
the hole of any deposits or debris.
Cleaning Impeller and Volute
Periodic cleaning of the pump parts will prolong the life and efficiency of the pump. Refer to the assembly
and disassembly of the pumping head.
1. Remove the five screws that hold the base to the volute, then separate the base from the volute. Do not
remove the motor housing cover.
2. Remove the base and clean the impeller and the volute passage. Do not use strong solvents on the
impeller. Do not remove the impeller.
3. Be sure the impeller turns freely after cleaning.
4. Attach the base to the volute and secure it with the five screws.
10
"Operation Testing" on page 8.