Circor IMO OptiLine LPE4 Installation instructions

LPE4 2022.03 en-GB, ID-No.: 163-041/E
Original Operating Manual
Before commencing any work, read this instruction carefully! Failure to comply with
these instructions may cause damage and personal injury!
!
Screw pumps
OptiLine LPE4
Contents Page
Introduction 2
Safety 2
Installation 5
Start-up 8
Trouble shooting 9
Maintenance and Service 12
Service intervals 13
List of components 14
Exploded View/Ordering code 15
Dismantling and reassembling the pump 16
Dismantling 17
Reassembly 20

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ATTENTION
ATTENTION
Safety
The manufacturer accepts no liability for damages caused by disregarding any of the documentation.
Intended use
• Only use the pump to pump the agreed pumped liquids (→ order data sheet).
• Adhere to the operating limits.
• Avoid dry running:
– Make sure the pump is only operated with, and never without, pumped liquid.
• Avoid cavitation:
– Open the pressure-side tting completely.
• Avoid damage to the motor:
– Do not switch on themotor more that themaximumpermissible number of times per hour (→ manufac-
turer’s specications).
• Consult the manufacturer about any other use of the pump.
• Pumps delivered without a motor must be assembled into a pump unit according to the provisions of
EC Machine Directive 2006/42/EC.
Prevention of obvious misuse (examples)
• Note the operating limits of the pump with regard to temperature, pressure, viscosity, ow rate and motor
speed (→ order data sheet).
• When using auxiliary systems, ensure there is a continuous supply of the appropriate operating medium.
• Do not operate the pump while the pressure-side tting is closed.
• Only select the setup type according to this operating manual. For example, the following are not allowed:
– Hanging pumps in the pipe
– Overhead installation
– Installation in the immediate vicinity of extreme heat or cold sources
General safety instructions
Observe the following regulations before carrying out any work.
Product safety
The pump has been constructed according to the latest technology and recognized technical safety rules.
Nevertheless, operation of the pump can still put the life and health of the user or third parties at risk or dam-
age the pump or other property.
• Only operate the pump if it is in perfect technical condition and only use it as intended, remaining aware of
safety and risks, and adhere to the instructions in this manual.
• Keep this manual and all other applicable documents complete, legible and accessible to personnel at all
times.
Document Purpose
ATEX additional instructions Operation in explosion-hazard areas
Order data sheet Technical specications, conditions of operation
Technical description Technical specications, operating limits
Supplier documentation Technical documentation for parts supplied by
subcontractors, e.g. drive system, coupling or
auxiliary operating system.
Spare parts list Ordering spare parts
Declaration of conformity Conformity with standards,
Content of the declaration of conformity
Other applicable documents
Introduction

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• Refrain from any procedures and actions that would pose a risk to personnel or third parties.
• In the event of any safety-relevant malfunctions, shut down the pump immediately and have the malfunc-
tion corrected by the personnel responsible.
• In addition to the entire documentation for the product, comply with statutory or other safety and acci-
dent-prevention regulations and the applicable standards and guidelines in the country where the system is
operated.
Obligations of the operating company
Safety-conscious operation
• Ensure that the following safety aspects are observed and monitored:
– Intended use
– Statutory or other safety and accident-prevention regulations
– Safety regulations governing the handling of hazardous substances
– Applicable standards and guidelines in the country where the pump is operated
• Make personal protective equipment available.
Qualied personnel
• Make sure all personnel tasked with work on the pump have read and understood this manual and all other
applicable documents, especially the safety, maintenance and repair information, before they start any work.
• Organize responsibilities, areas of competence and the supervision of personnel.
• Ensure that all work is carried out by specialist technicians only:
– Fitting, repair and maintenance work
– Work on the electrical system
• Make sure that trainee personnel only work on the pump under the supervision of specialist technicians.
• Persons who have an implanted pacemaker:
– Must stay away from the pump with magnetic coupling and parts of the magnetic coupling
– May not work on or with any of the magnetic parts
Safety equipment
• Provide the following safety equipment and verify its functionality:
– For hot, cold and moving parts: on-site safety guards for the pump
– For possible electrostatic charges: provide the necessary grounding
– If there is no pressure relief valve in the pump: Provide an appropriate safety valve on the pressure
side between the pump and the rst shut-off device
Warranty
• Obtain the manufacturer’s approval prior to carrying out any modications, repairs or alterations during the
warranty period.
• Only use genuine parts or parts that have been approved by the manufacturer.
Drive system
For pumps delivered without a drive system, comply with the following requirements for the drive system:
• When using three-phase asynchronous motors, observe IEC 60034-30-1.
• Power of the drive according to EN ISO 5199 is recommended (EN ISO 5199 also applicable for drives of
screw pumps).
• Use coupling guard with the following requirements:
– Fastening elements must be connected to the pump unit in undetachable design (cannot get lost).
– Safety distances against the reaching of hazardous areas according to EN ISO 13857 must be
complied with.
Obligations of the operating company
• All directions given on the pump must be followed (and kept legible), e.g. the arrow indicating the sense of
rotation and the markings for uid connections.
• Pump, coupling guard and components:
– Do not step on them or use as a climbing aid
– Do not use them to support boards, ramps or beams
– Do not use them as a xing point for winches or supports
– Do not use them for storing paper or similar materials
– Do not use hot pump or motor components as a heating point
– Do not de-ice using gas burners or similar tools
• Do not remove the safety guards for hot, cold or moving parts during operation.
• Use personal protective equipment whenever necessary.
• Only carry out work on the pump while it is not running.
• Isolate the motor from its supply voltage and secure it against being switched back on again when carrying
out any tting or maintenance work.
• Reinstall the safety equipment on the pump as required by regulations after any work on the pump.
• With an implanted pacemaker:
– Stay at least 1 meter away from the pump with magnetic coupling or parts of the magnetic coupling.
– Do not work with or on the magnetic parts.

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Magnetic eld
The magnetic eld of the magnetic coupling can destroy products that are sensitive to magnets.
These include:
• Pacemakers
• Plastic identity cards with magnetic strips
• Credit and check cards
• Electric, electronic and precision mechanical devices (such as mechanical and digital clocks, pocket
calculators, hard disks)
Specic hazards
Explosion-hazard area
• (→ ATEX additional instructions).
Hazardous pumped liquids
• Observe the safety regulations for handling hazardous substances (e.g. hot, ammable, poisonous or po-
tentially harmful) when handling hazardous pumped liquids.
• Use personal protective equipment when carrying out any work on the pump.
• Noise level:
– Check individual pump series noise level in respective Product Description

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max. 90°
min. 60°
Fig 2. Lifting the pump
For pumps in explosion-hazard areas
(→ ATEX additional instructions).
Design limitations and technical data for each pump
are found in the Product description. Installation of IMO
AB low pressure pumps does not require special skills.
However, these instructions presume that the work is
carried out by experienced tters!
1212 Failure to comply with these instructions
may cause damage and personal injury
Transport and storage
Always protect the pump against ingress of water
and other impurities. Store the pump in a clean, dry
and warm environment. The pump is delivered with
the internals oiled and with protective covers over the
pipe connections and drain openings. These covers
should remain in place for as long as possible during
the mounting and installation procedure but must be
removed before start up.
Lifting of pump
Lifting of the complete pump unit with the lifting device
attached to the motor, should be avoided as the motor’s
lifting provisions may not be able to carry the combined
weight of the pump and motor.
1313 All pumps should be lifted with straps
securely attached to the pump or pump
unit, so that the center of gravity is located
between the straps in order to avoid
tipping of the pump.
Strainer
The pump has to be protected from foreign matters
such as weld slag, pipe scale, etc., that could enter the
pump via the suction line. If the cleanliness of the sys-
tem cannot be guaranteed, a strainer must be installed
in the inlet pipe near the pump. For practical reasons
a suction strainer with 0.8-2.0 mm mesh openings is
recommended.
The size of the strainer should be selected so that it is
large enough to allow adequate pressure at the pump
inlet. The pressure drop across the strainer should
preferably not exceed 0.1 bar at max. ow rate and nor-
mal operating viscosity. A vacuum gauge between the
strainer and the pump inlet is recommended to indicate
when the strainer needs cleaning.
1414 All work carried out on the pump has to be
performed in such a manner that risks for
personal injury are observed.
1515 Lifting a complete pump unit, using
slings or hooks attached to the pump or
connecting frame may be dangerous since
the centre of gravity of the pump unit may
be higher than the points of attachement.
Fig. 3 Strainer
Installation
Fig 1. Keep dry and clean

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Fig. 6 Deaeration
Pipe connections
The pipe work shall be installed and supported so that
no pipe stresses are transferred to the pump body.
The pipe forces and torque transferred to the pump
shall be in accordance with ISO 14847. The pipe work
should be tight in order to avoid leakage and inltration
of foreign particles and/or air. Shut off valves should be
installed in both suction and discharge pipes, so that
the pump can be hydraulically isolated.
Suction line
The suction pipe should be designed so that the total
pressure drop, measured at the pump inlet ange, does
not exceed the suction capability of the pump. Make a
proper calculation of the suction line including compo-
nents such as valves, strainer, pipe bends etc. Gener-
ally, the pressure drop in the suction line should be as
low as possible, which is achieved if the suction pipe is
short, straight and has a suitable diameter. The velocity
in the suction line should be kept in the range
0.5 - 1.2 m/s. For L.O. circulating systems, we recom-
mend to keep it as low as possible. The suction line
must be equipped with a port that allows lling the
pump before start.
Discharge line
The discharge line should be dimensioned to keep the
velocity in the range 1 - 3 m/s.
Deaeration
In installations with negative suction head, where the
pump might be started against a pressurized system, a
deaeration pipe with an orice (2-3 mm is recommend-
ed) has to be installed. The deaeration pipe should be
connected to the outlet pipe’s highest point. This must
also be installed when the pump is used as a stand-by
pump.
Liquid trap
In some mounting arrangements the pump may not
retain the liquid at stand still. In such installations the
suction pipe should be arranged so it forms a liquid trap
together with the pump, keeping the pump half lled
with liquid.
Fig. 4 Pipe connections
Fig. 5 Suction Line
1616 When handling liquids that may harm skin
use gloves and/or protective clothing
1717 When handling liquids shich may involve
re hazards appropriate precautions to
avoid danger are to be taken.
Fig. 7 Liquid trap

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bar
Gauges
Gauges for monitoring the pump’s working conditions
are recommended. These gauges should be placed
readable as close to the pumps in- and outlet anges as
possible. On the LPE Optiline standard pumps there are
gauge connections for both in- and outlet.
Pressure relief valve
All systems with screw pumps must be equipped with
a pressure relief valve installed immediately adjacent
to the pump. In the standard versions of IMO LPE
Optiline pumps, this pressure relief valve is an integral
part of the pump to protect the system against excess
pressure. When liquid is circulated through the valve it
heats up in proportion to the set pressure level and the
percentage of by-passed liquid. 100% bypass can only
be tolerated for less than about 3 minutes, 50 %by-pass
generally for unlimited periods of time. If more than
50% recirculation is anticipated, a value specic to each
application should be determined by closely monitoring
the pump body temperature. If the pump is operating in
line with a separate pressure control valve (see g.9),
the setting of the relief valve should be high enough
so as not to interfere with the control valve. Likewise, if
two pumps are operating in parallel, the setting should
be such that interference between the two valves is
avoided.
Also remember that a total bypass by the pumps
internal relief valve for longer periods will cut of the
cooling ow to the pumps magnetic coupling and
cause an overheating with destroyed magnets as a
result quite fast.
1818 Oil leakage may make the oor slippery
and couse personal injury.
Fig. 8 Gauges
Fig. 9 Pressure Relief Valve
Fig. 10 External control with presssure relief valve

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For pumps in explosion-hazard areas
(→ ATEX additional instructions).
Pressure testing and ushing
The system must be ushed and pressure tested before
connecting the pump. If corrosive liquid, such as water
is used, the system must be thoroughly drained, dried
and protected against corrosion after having been
ushed.
Before starting:
After installation and whenever it can be assumed that
the pump has been emptied, the pump must be thor-
oughly lled with liquid. See g 11.
1919 Make sure the prime mover is locked out
and can not be started accidentally.
Direction of rotation
When the pump is ready to be started, switch the motor
briey on and off and check that the drive motor rotates
in the correct direction as indicated by the rotation ar-
row. The arrow is placed on the side of the front cover
5010 as well as on riveted steel plates on the connect-
ing frame 003.
Differential pressure
Differential pressures bellow 1 bar is strictly forbidden
as the magnetic coupling under these conditions may
loose its cooling ow and cause an overheating of the
magnetic coupling with a risk of a potential re as a
result.
We do strongly recommend magnetic coupled pumps to
be equipped with a differential pressure monitoring de-
vice that stops the pump automatically if the differential
pressure for some reason should drop to below 1bar.
Air in the pumped uid
It is forbidden to use the LPE Optiline pump with uids
that contains more than 0,2% of air due to the risk of
ignition during an eventual overheating of the pump.
Fig. 11 Filling the pump
Fig. 12 Direction of rotation
Fig. 13 Differential Pressure
2020 Don't mix up with arrow for inlet and
outlet!
Startup

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Problem Cause What to do
Wrong direction of rota-
tion
- Electric cables to motor wrongly
connected.
Reverse the terminal connection on
electric motor.
2121 Connecting and disconnec-
ting of electric cables must
be done only by personnel
authorized to do such
work.
The pump cannot be
primed
- Wrong direction of rotation.
- Suction line is not open or pressure
drop in the suction line is too high.
- Major air leakage into the suction
line.
- The pump cannot evacuate the air
through the discharge line due to
excessive counter pressure.
See above.
Check all components in suction line.
The inlet condition should be checked
with a vacuum gauge at the pump inlet.
Check the suction line.
See the chapter on Deaeration
(see page 19).
The magnetic coupling is
slipping
- A too high viscosity has caused the
magnetic coupling to slip.
- The pump is blocked inside the ro-
tors by a foreign object.
Lower the viscosity to a maximum
approved (the viscosity normally used
in the pumped liquid) and restart the
pump by switching it off and on.
Remove the foreign object from the
pump and control the bores and rotors
for abnormalities/damages. Restart the
pump by switching it off and on.
No ow - The pump is not primed.
- The pressure relief valve is set be-
low the counter pressure.
See above.
Readjust the pressure relief valve to a
value above counter pressure.
Flow too low - The magnetic coupling is slipping
- The pressure relief valve is set too
low (Discharge pressure also low).
- Something is restricting the ow in
the suction line. (This would usually
cause noise).
- The pumped liquid contains a
signicant amount of compressible
gas, such as free air. (This would
usually cause noise).
See above.
Readjust the pressure relief valve
Check all components in the suction
line (strainers, valves etc.).
Go thru the system and determine if
there are any leaks.
Trouble shooting

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Problem Cause What to do
Pressure too low - The pressure relief valve is set too
low.
- Counter pressure in the discharge
line is too low due to a major leak-
age.
- The valve piston is stuck in open
position.
- Something is restricting the ow in
the suction line. (This would usually
cause noise).
- The pumped liquid contains a
signicant amount of compressible
gas, such as free air. (This would
usually cause noise).
- A too small pump has been chosen.
Readjust the pressure relief valve.
Check the components in the discharge
line inclusive the recipients.
Check the valve. See Maintenance and
Service instruction for this pump.
Check all components in the suction
line (strainers, valves etc.).
Contact your IMO AB representative.
Pressure too high - The pressure relief valve is set too
high.
- The oil is too cold (or has higher
viscosity than anticipated).
- Counter pressure in the discharge
line is too high.
Readjust the pressure relief valve.
Reduce the pressure setting until oper-
ational temperature has been reached.
Check the discharge line.
Drive motor difcult to
start or tends to stop by
tripping the motor over-
load relay
- Counter pressure too high.
- Liquid too cold.
- Motor is undersized for the prevail-
ing conditions.
- Electrical power supply faulty.
- Motor overload relay set too low or
is faulty.
- Incorrect setting of Y/D starter.
See above: Pressure too high.
Readjust the pressure relief valve to a
lower value. Thus the power consump-
tion for the pumping is relieved and
overloading due to the high viscosity
may be avoided. When the liquid has
reached normal temperature and thus
ows easily, the relief valve is reset to
normal pressure.
Check the motor.
Check the motor and motor connection.
Readjust or replace the relay.
Readjust the setting of the starting
sequence. The time before the motor
overload relay is tripped should not
exceed 10-15 seconds.
Noise and vibration
2222 Monitor the
pump function
and shut down
if any sign of
malfunction is
noticed
- The ow to the pump is insufcient.
- Insufcient support of pipe work.
- Air leakage into the suction line.
- Faulty electrical supply.
See chapter: The ow is too low.
Check for pipe vibrations in the pump
connections. Check that the pipes are
sufciently clamped.
Check the suction line for air leakage.
Check all three phases of the supply.

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Indentication of safety instructions
Non complience of safety instruc-
tions identied by the following
symbol could affect safety for
persons
Safety instructions where
electrical safety is invol-
ved are identied by:
Safety instructions which shall be considered
for reasons of safe operation of the pump
or pump unit and/or protection of the
pump or pump unit itself are marked
by the sign:
Introduction
A screw pump from IMO is a quality product that is designed for a long problem free operation in tough environ-
ments. As all other mechanical products they do however requires a certain grade of maintenance and service in
order to guarantee a faultless and economic favourable operation.
A recommendation is to go through the pump each 5 year in order to replace wear details such as ball bearings and
certain gaskets and o-rings. A relatively small review of a screw pump from IMO means that the pump in most of
the cases will be in a condition “as new” and therefore give the operator another long and problem free operation.
Maintenance and Service
For pumps in explosion-hazard areas (→ ATEX additional instructions).

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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 signicantly
reduce service life and call for shorter service intervals.
Wear in the pump will normally show as:
• Vibration
• Noise
• Loss of capacity
• Reduction in ow/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 anks: 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 uid.
Common aspects with magnetic
couplings
Permanent magnetic couplings generate a strong
magnetic eld. 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. Modications 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, oppy disks
etc may become unreadable and should always be kept
separated from the magnetic eld.
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.
22 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 sufcient.
Precautions prior to starting
maintenance on the pump
33 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
44 All work carried out on the pump has to be
performed in such a manner that risks for
personal injury are observed!
55 When handling liquids that may harm skin,
use gloves and/or protecting clothing!
66 When handling liquids which may involve
re hazard appropriate precautions to
avoid danger are to be taken.
77 In case of failure for system with elevated
pressure, uid jets may cause injury and/
or damage.
88 Oil leakage may make the oor slippery
and cause personal injury.
99 Before any maintenance work, ensure that
the driver is deenergized and the pump
hydraulically isolated.
1010 Connecting and disconnecting of electrical
cables must be done only by personnel
authorized to do such work.

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List of components
Valid for all LPE Optiline Generation 4 pumps with sizes 025, 032, 038 and leads L, K, N & D
With version codes, NJBP, NKBP, NLBP & NMBP
PosNo Designation Qty G012 G054 G057 G070 G098 Notes
002 Motor 1
003 Connecting frame 1
004 Angle bracket 1
005 Magnetic coupling complete 1 X
005A Retaining ring 1 X X X
005B Sealing can 1 X
005C Inner magnetic rotor 1 X
005D Outer magnetic rotor 1 X
006A Screw 4
007A Screw 6
007B O-ring 1 X X X
1020 Power rotor 1 X X
112 Balancing piston 1 X X 2
113 Shaft key 1 X X
122 Ball bearing 1 X X
124 Retaining ring 1 X X X
124A Support ring 1 X X X
202 Idler rotor 2 X X
351 Balancing bush 1 X X
401 Pump body 1
418 Gasket 1 X X 1
423 Gasket 1 X X 1
451 Screw 4
453 Screw 4
462 Plug 1
462A Sealing washer 1 X X
463 Plug 1
463A Washer 1 X X
5010 Front cover 1
502 Plug 2
506 Gasket 1 X X
551 Rear cover 1
556 Gasket 1 X X
6000 Compl. Valve 1 X
(605) O-ring 1 X X X
(608) Valve spindle 1 X 2
(608A) Tension pin 1 X 2
6120 Set screw 1 X 2
(613) Tension pin 1 X 2
(614) Valve piston 1 X 2
(615) Valve spring 1 X 2
701 Stud bolt 4
701A Washer 4
701B Nut 4
702 Screw 4
702A Washer 4
703 Screw 3
703A Washer 3
703B Nuts 3
998 Drive hub 1
998B Screw 1
Explanations
G012: Rotorset
G054: Major kit
G057: Joint kit
G070: Complete valve
G098: Complete mag-
netic coupling
Notes:
1) Gaskets for counter
anges
2) Not sold separately

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1111 Before commencing any work, read this instrucion carefully! Failure to comply with these instrutions
may cause damage and personal injury!
For more information about the pumps identication code, technical data and performance we refer to the LPE
Product description.
Recommended Spare Parts Kits
and tool kits
Every shutdown for service of a plant is costly.
The time for repair should therefore be limited to
a minimum which can be accomplished by keep-
ing a spare pump. The changed pump can later be
repaired at a suitable place and can then be used as
a spare pump. For maintenance the following spare
parts kits and tools are recommended:
Ordering Code
Part numbers for pump size
Item Spare part sets 025 032 038
G012 Rotor set D-lead - - 90119 33 62
" K-lead - - 901193360
" L-lead 901193356 901193358 -
" N-lead 901193357 901193359 9 01193 3 61
G054 Major kit D-lead - - 90119 39 91
" K-lead - - 901193992
" L-lead 9 01193987 9 011939 89 -
" N-lead 9 01193 9 88 901193990 901193993
G057 Joint kit 90119 39 9 4 9 011939 9 4 90119 39 9 5
G070 Valve element 9 01189873 90118 9 873 90118 9 873
G098 Magnetic cou-
pling
xKxx 9 01193 370 9 01193370
" xLxx 901193371 9 01193371 90119 3 371
" xMxx 9 01193372 901193 372
" xNxx 9 01193373
122 Ball bearing 901173765 901173765 901173591
-Flange kit 90119 39 9 8 901193999 901194000
-Flange gasket 90119 39 97 901193 9 9 6 90115 8 626
Kit: Content: To be used for:
G057 Gaskets & o-rings Dismantling of pump
G012 Rotor set Repair after break down
122 Ball bearing Repair after break down
Exploded View
002
702
702A
006A
701A
701B
701
463
463A
124
124A
122
351
998B
998
005D
703
703A
004 703B
003
007A
113
202
6120
613
608
605
401
556 551
462A
462
453
440
608A
615
614
6000
1020
005B
007B
5010
506
005A
005C
451

LPE4 2022.03 en-GB, ID-No.: 163-041/E
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16
List of tools necessary for dismantling and reassembly
A = Puller
B = Spanner 16 mm
C = Plastic mallet
D = Allen keys (3 mm & 5 mm)
E = Screw driver
F = Plier
G = Oil can
Sectional View
Tightening Torque
table
Dismantling and reassembling the
pump
Tightening torque (Nm)
Pos No Torque
0006A
0007A
9
5
451 40
453 40
462 40
463 40
701 40
702 IEC
80-90
100-132
25
40
703B IEC
80-90
100-132
25
40
998B IEC
80
90
100-132
9
20
40
-
Loctite 222
998B, 006A - Fastened with
sealant Loctite 222 or similar

LPE4 2022.03 en-GB, ID-No.: 163-041/E
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Dismantling
A.
•
Turn the electricity OFF.
• Close the valves.
1111 Use appropriate vessels to collect oil
spillage when removing and opening
the pump.
B.
• Loosen the nut 701B with a spanner.
C.
• Pull out the pump in a straight line from the
connecting frame together with the magnetic
coupling. Beware of the magnetic force!
E.
• Remove the circlip 005A with a suitable plier.
D.
• Loosen the screws 007A with a allen key
• Pull out the sealing can 005B
• Remove the o-ring 007B
F.
• Remove the inner magnetic rotor by means of a
suitable puller.
701B
007A
007B
005B
005A

LPE4 2022.03 en-GB, ID-No.: 163-041/E
www.imo.se
18
G.
•remove the key 113 with a suitable tool.
H.
• Unscrew the bolts 451 with an allen key.
• Remove the front cover 5010 with its gasket
506.
I.
• Pull out the main rotor 1020 from the pump
body with hand force.
K.
• Remove the ball bearing 122 from the main
rotor 1020 with a suitable puller
J.
• Remove the circlip 124 with a suitable plier
from the main rotor 1020.
• Remove the support washer 124A from the
main rotor 1020.
L.
• Pull out the idlers 202 from the pump body.
113
1020
122
202
124A
124
506 451
5010

LPE4 2022.03 en-GB, ID-No.: 163-041/E
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M.
• Release tension spring by turning the set screw
6120 CCW as much as possible.
Note: Count number of turns when opening
to get correct settings when reassembly.
N.
• Loosen and remove screw 453.
• Remove gasket 556.
O.
• Remove the relief valve and replace the o-ring
605.
• Reassembly relief valve.
Q.
• Unscrew the bolts 006A and remove the
magnet 005D from the drive hub 998.
P.
• Remove bolts 702 and pull out the motor from
the connection frame.
R.
• Release the screw 998B.
6120
453
702
556
605

LPE4 2022.03 en-GB, ID-No.: 163-041/E
www.imo.se
20
S.
• Measure the distance between motor shaft
end and the drive hub.
T.
• Remove the drive hub from the electrical motor
with a puller.
B.
• Measure the distance so that it will be the
same as before the dismount.
• Tight the screw 998B as per the tightening
torque table.
• Lock the screw with sealant Loctite as per the
tightening torque table.
C.
• Mount the magnet 005D onto the drive hub
998 by tightening the bolts 006A.
• Lock the bolts with sealant Loctite as per the
tightening torque table.
A.
• Press the drive hub 998 on to the shaft by
means of a suitable stud bolt with a washer
and nut.
Reassembly
D.
• Mount the electrical motor back into the con-
necting frame and tight the bolts 702.
998B