Periodic Service - Little Giant 5 Serie Manuel Du Propriétaire

Testing the Diaphragm Switch
The suction causes the switch diaphragm to draw inward, activating the switch inside the switch hous-
ing. When syringe is released, the diaphragm returns to its original position deactivating the switch
inside the switch housing.
NOTE: This test is recommended for bench testing only.
1. Squeeze the bulb of a suction bulb syringe to create suction.
2. Insert the small end of the syringe into the breather tube of the power cord
or stripped end of the power cord.
3. Release the bulb to induce suction/vacuum.
4. Listen for the switch to make a click sound.
5. Once the suction/vacuum equalizes, listen for the diaphragm switch to release.
MAINTENANCE

Periodic Service

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 can become pressur-
ized and hot under normal operating conditions.
Risk of damage to pump or other equipment.
• Do not remove the motor housing cover.
• Do not remove the impeller. This action requires special tools and may damage the pump.
1. Disconnect the pump from electric power.
2. Disconnect the discharge hose from the pump.
3. Remove the screen by prying in the slots between the screen
and the volute.
4. Remove the screws that hold the volute to the motor housing.
5. Remove the volute, being careful not to lose the seal ring.
6. Clean the impeller and the volute passage. Do not use strong
solvents on the impeller.
7. If the impeller is removed, make sure it is spaced 0.05 inches (1.27 mm) when reassembled.
8. Be sure the impeller turns freely after cleaning.
9. Replace the seal ring into the volute and secure the volute to the motor housing with screws.
10. Replace the screen onto the volute.
2
MAINTENANCE
Periodic Service
2
7
1
5