8 | EN
Copyright © Liberty Pumps, Inc. 2021 All rights reserved.
5459000C
Maintenance
As the motor is oil-filled, no lubrication or other maintenance is
required. If replacement lubrication is required, use ISO VG 10
turbine oil. Use approximately 1.4 gallons to just cover the upper
bearing of the motor.
Severe operating environments will require more frequent checks.
For any issues that are not resolvable, contact Liberty Pumps for
further assistance.
Monthly
Pumps that are idle for more than a month in a dry basin should
have impellers manually operated through the breaker panel
monthly to lubricate the seals.
Pumps that are idle in a wet basin
must be removed.
Quarterly
1. Check pumps for corrosion and wear.
2. Check for free and unobstructed float switch operation and
float switch condition.
3. Inspect for proper check valve operation.
4. For multiple pumps, check for balanced operating times.
Uneven times indicate a defective unit, float switch or control.
5. Inspect the control panel for any presence of moisture in
enclosure, loose connections, and general component
condition.
Annually
1. Basin should be inspected and cleaned. Replace any defective
components.
Troubleshooting
No repair work shall be carried out during the warranty period
without prior factory approval. To do so may void the warranty.
Liberty Pumps, Inc. assumes no responsibility for damage or injury
due to disassembly in the field. Disassembly, other than at Liberty
Pumps or its authorized service centers, automatically voids
warranty.
Table 2. Troubleshooting Matrix
Problem
Possible Cause
Corrective Action
Pump does not start.
Damaged power or control cord.
Replace as needed.
Control panel selector switch in OFF position.
Set selector switch to Hand or Auto position.
Blown control circuit transformer fuse.
Replace fuse.
Tripped circuit breaker, blown fuse, or other
interruption of power.
Reset tripped circuit breaker, replace blown fuse with
properly sized fuse, check that the unit is securely
plugged in, investigate power interruption.
Improper voltage.
Have an electrician check all wiring for proper
connections and adequate voltage and capacity.
Float switch unable to move to the pump ON
position due to interference in basin or other
obstruction.
Position the pump or float switch so that it has adequate
clearance for free movement.
Insufficient liquid level.
Verify the liquid level is allowed to rise enough to
activate float switch(es).
Defective float switch.
Replace float switch.
Obstructed impeller or volute.
Remove obstruction.
Loose wiring connections.
Check and tighten all connections.
Thermal overload tripped.
Wait for pump to cool to operating temperature.
