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13
Service intervals
The intervals for inspection and replacement of wear
parts vary greatly with the properties of the pumped liq-
uid and can only be determined by experience. All inter-
nal parts of the LPE Optiline pump are lubricated by the
pumped liquid. Pumping liquid which contain abrasive
materials, or liquid that is corrosive, will significantly
reduce service life and call for shorter service intervals.
Wear in the pump will normally show as:
• Vibration
• Noise
• Loss of capacity
• Reduction in flow/pressure
• Loss of the magnetic power
We recommend planned inspections and/or overhaul
at regular intervals, not exceeding 5 years. It is recom-
mended to always have the spares included in joint
spare part kit G057 together with the ball bearing 122
available for a planned inspection.
Inspection of rotors
To reach the idler rotors in a quicker way than de-
scribed in the dismantling section, loosen the rear cover
(480) with the valve. Screw out the idler rotors back
-
wards. Internal clearances in the pump, which are vital
for its proper function, may have been affected by wear.
Acceptable wear can be determined only by experience
of the actual application. As a rule of thumb the follow-
ing max clearance values may apply: Between rotor
and bores: 0.2 mm, Between rotor flanks: 0.4 mm For
light duties (low pressure, medium viscosity) even big
-
ger clearances may be acceptable but for low viscosity/
high pressure duties the limit will be lower. Also watch if
there are major scratches on these parts.
Inspection of the magnetic coupling
The magnetic coupling with all its components is con-
sidered to be maintenance free if operated and mount-
ed according to our instructions.
The lifetime of the magnets is well within the lifetime of
the pump and exchange of the magnets is only neces-
sary if a major breakdown has occurred as a result of
for example excessive amounts of dirt or particles in the
pumped fluid.
Common aspects with magnetic
couplings
Permanent magnetic couplings generate a strong
magnetic field. The installation must be carried out only
by trained staff that has the understanding of how a
magnetic coupling acts and all the safety precautions
related to it. All installation instructions must be strictly
followed. Modifications or changes to the magnetic cou
-
pling or its components are not to be allowed under any
circumstances. IMO does NOT take any responsibili-
ties for damages caused by improper use or damages
related to this.
Magnetic data carriers such as bank cards, floppy disks
etc may become unreadable and should always be kept
separated from the magnetic field.
DANGER
Installations and maintenance must always take place
during complete shutdown in an un-pressurised condi-
tion. The drive unit must be secured against inadvertent
switching on by means of blocking the electrical supply
to the electric motor in order to avoid serious injuries
due to rotating parts.
2
ATTENTION! In areas where permanent
magnetic couplings are handled or
stored with open access, persons with
heart
pacemakers
should keep a distance
of 3 meters. For permanent magnetic
couplings assembled within a pump a
safety distance of 3 meter is sufficient.
Precautions prior to starting
maintenance on the pump
3
If the pumps operating temperature
exceeds 60°C, let the pump cool off before
any service, maintenance or dismantling
work is commenced to avoid burn injury
4
All work carried out on the pump has to be
performed in such a manner that risks for
personal injury are observed!
5
When handling liquids that may harm skin,
use gloves and/or protecting clothing!
6
When handling liquids which may involve
fire hazard appropriate precautions to
avoid danger are to be taken.
7
In case of failure for system with elevated
pressure, fluid jets may cause injury and/
or damage.
8
Oil leakage may make the floor slippery
and cause personal injury.
9
Before any maintenance work, ensure that
the driver is deenergized and the pump
hydraulically isolated.
10
Connecting and disconnecting of electrical
cables must be done only by personnel
authorized to do such work.
