3473000C
Copyright © Liberty Pumps, Inc. 2021 All rights reserved.
9 | EN
Maintenance and Troubleshooting
Accidental contact with electrically live parts, items, fluid, or
water can cause serious injury or death.
Always disconnect pump(s) from power source(s) before
handling or making any adjustments to either the pump(s),
the pump system, or the control panel.
Do not enter a pump basin after it has been used. Sewage and
effluent can emit several gases that are poisonous.
All electrical and motor repairs and service must be
performed by a repair facility approved by Liberty Pumps and
certified to work on explosion-proof motor enclosures.
Wear adequate Personal Protective Equipment when working
on pumps or piping that have been exposed to wastewater.
Sump and sewage pumps often handle materials that can
transmit illness or disease upon contact with skin and other
tissues.
Use only non-sparking tools and components in and around
basins, open covers and vents. Do not use electronic devices
that are not rated for use in hazardous locations or have live,
exposed electrical circuits in or around basins, open covers
and vents. Sewage and effluent systems produce and may
contain flammable and explosive gases and sparks could
ignite these gases.
Verify proper 3-phase pump rotation before retuning to
service.
Maintenance
As the motor is oil-filled, no lubrication or other maintenance is
required.
Some pumps come equipped with an air bleed hole to help
prevent airlock. A small spray of water from this hole is normal
while pump is running.
In the event the pump becomes clogged, the inlet screen can be
removed to gain access to the pump impeller. Once the
obstruction is removed, the anti-air lock hole should be cleaned.
Severe operating environments will require more frequent checks.
For any issues that are not resolvable, contact Liberty Pumps for
further assistance.
To keep the pump/pump system operating smoothly, perform the
following routine checks:
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 pump(s) 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.
Field Service on Hazardous Location Pumps
The power and control cord are not field replaceable. If either cord
is compromised, the entire pump must be brought to an
authorized hazardous motor enclosure repair facility approved by
Liberty Pumps.
The only allowable repair/replacement without compromising the
hazardous location rating of the pump is the lower shaft seal
replacement. A certified repair shop should perform this task since
they have the capability to clean and flush the mid oil chamber.
Otherwise, the pump must be returned to Liberty Pumps or an
authorized hazardous repair facility for electrical and motor
service. This will ensure the integrity of the hazardous location
rating of the pump and comply with Liberty Pumps warranty
requirements.
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 an
authorized hazardous motor enclosure repair facility approved by
Liberty Pumps or its authorized service centers, automatically
voids warranty.
RISK OF ELECTRIC SHOCK
RISK OF SERIOUS INJURY OR DEATH
