Nidec LSES Series, LSES 100 LG, LSES 100 LR, LSES 112 M, LSES 112 MR Installation & Maintenance

LS / LSES, aluminium motors
FLSES, cast iron motors
PLSES, IP23 drip-proof motors

Three-phase induction
motors

Installation & maintenance

Part number: 4850 en - 2018.11 / f

2

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

IMPORTANT

These symbols appear in this document whenever it is important to take special precautions during installation,
operation, maintenance or servicing of the motors.

It is essential that electric motors are installed by experienced, qualied and authorized personnel.

In accordance with the main requirements of EU Directives, the safety of people, animals and property should be

ensured when tting the motors into machines.

Particular attention should be given to equipotential ground or earthing connections.

The noise level of the machines, measured under standard conditions, conforms to the requirements of the standard.

The following preliminary precautions must be taken before working on any stationary device:

• mains voltage disconnected and no residual voltage present

• careful examination of the causes of the stoppage (blocked transmission - loss of phase

- cut-out due to thermal protection - lack of lubrication, etc)

3

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

Dear Customer,

You have just acquired a LEROY-SOMER motor.

This motor benets from the experience of one of the largest manufacturers in the world, using state-of-the-art technology in
automation, specially selected materials and rigorous quality control. As a result, the regulatory authorities have awarded our motor
factories the ISO 9001 - Edition 2015 international certicate.

We thank you for making this choice, and would ask you to read the contents of this manual.

By observing a few essential rules, you will ensure problem-free operation for many years.

MOTEURS LEROY-SOMER

CE conformity

Our motors conform to standard EN/IEC 60034-1, and to the directives 2014/35/EU (low voltage) modied by Directive 2006/42/EC
(machine), which is demonstrated by their marking with the symbol

NOTE :

LEROY-SOMER reserves the right to modify the characteristics of its products at any time in order to incorporate the latest technological
developments. The information contained in this document may therefore be changed without notice.
Copyright 2018 : MOTEURS LEROY-SOMER
This document is the property of MOTEURS LEROY-SOMER.

It may not be reproduced in any form without prior authorization.

All brands and models have been registered and patents applied for.

4

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

CONTENTS

1 - RECEIPT ............................................................... 5

1.1 - Identication ............................................................5

1.2 - Storage ...................................................................6

2 - ASSEMBLY ........................................................... 6

2.1 - Checking the insulation ...........................................6

2.2 - Location - ventilation ...............................................7

2.3 - Coupling .................................................................. 7

2.4 - Electrical guidelines ..............................................10

2.5 - Mains connection ..................................................13

3 - ROUTINE MAINTENANCE ................................. 16

3.1 - Lubrication ............................................................16

3.2 - Bearing maintenance ............................................20

4 - PREVENTIVE MAINTENANCE ........................... 20

5 - TROUBLESHOOTING GUIDE ............................ 21

6 - CORRECTIVE MAINTENANCE: GENERAL ...... 22

6.1 - Dismantling the motor ...........................................22

6.2 - Checks before reassembly .................................... 22

6.3 - Mounting the bearings on the shaft ........................ 22

6.4 - Reassembling the motor....................................... .22

6.5 - Reassembling the terminal box .............................22

7 - POSITION OF LIFTING RINGS ........................... 23

8 - SPARE PARTS .................................................... 24

9 - RECYCLING ........................................................ 24

DISMANTLING AND REASSEMBLY
PROCEDURES

10 - LS/LSES MOTORS ........................................... 26

10.1 - 71 to 160 MP/LR motors ...................................... 26

10.2 - 160 M/L/LU, 180 MT/LR motors ..........................28

10.3 - 180 L/LUR, 200 L/LR/LU, 225 ST/MT/MR,

250 MZ motors ....................................................30

10.4 - 225 MG, 250 ME/MF, 280 SC/MC/SD/MD,

315 SN motors ..................................................... 32

10.5 - 280 SU/SK/MK, 315 (except SN) motors ............. 34

11 - FLS/FLSES MOTORS ....................................... 36

11.1 - 80 to 132 motors ..................................................36

11.2 - 160, 180 MR motors ............................................38

11.3 - 180 M/L/LUR, 200 LU, 225 MR/SR motors ..........40

11.4 - 225 M to 280 motors ............................................42

11.5 - 315 to 355 LD motors...........................................44

12 - PLS/PLSES MOTORS ...................................... 46

12.1 - 180 LG/LGU, 200 M/L/LP/LU/LR,

225 MR motors .................................................... 46

12.2 - 225 MG, 250, 280 SC/SD/MC/MD motors ........... 48

12.3 - 280 MG, 315 motors ............................................ 50

INDEX

Adjustment ...........................................................................8

Alarms - early warning ........................................................12

Assembly .............................................................................. 6

Balancing..............................................................................7

Belts......................................................................................9

Built-in thermal protection ................................................... 12

Cable gland.........................................................................13

Cables: cross-section .................................................. 14 - 15

Capacitors .......................................................................... 11

Connection .........................................................................15

Connection diagrams .......................................................... 15

Corrective maintenance ...................................................... 22

Coupling .......................................................................... 7 - 8

Coupling sleeves ..................................................................8

Digistart ..............................................................................10

Direction of rotation ............................................................. 15

Draining condensation ....................................................... 16

Earth terminal .....................................................................15

Earthing .............................................................................. 11

European directives .............................................................. 5

Frequency inverter .............................................................. 11

Greasing - Grease nipples ...................................... 6 - 16 - 20

Handling ...............................................................................7

Identication .........................................................................5

Inertia ywheel ......................................................................8

Insulation .............................................................................6

Lifting rings .........................................................................23

Location ...............................................................................7

Logos ...................................................................................5

Lubrication .......................................................................... 16

Mains connection ................................................................ 13

Nameplate ............................................................................ 5

Power .................................................................................10

Power supply ...................................................................... 15

Preventive maintenance .................................................... 20

Protection ...........................................................................12

Pulleys .................................................................................. 9

Receipt .................................................................................5

Routine maintenance ......................................................... 20

Shields ......................................................................... 16 - 20

Slide rails .............................................................................. 9

Space heaters.....................................................................12

Spare parts ........................................................................ 24

Starting ...............................................................................10

Storage ................................................................................. 6

Terminal box ...................................................................... 13

Terminal box: tightening the nuts.........................................15

Tie rods: tightening .............................................................22

Tolerances ............................................................................8

Troubleshooting ..................................................................21

Ventilation ............................................................................. 7

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Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

RECEIPT

Please quote when
ordering spare parts

1 - RECEIPT

On receipt of your motor, check that it has not suffered any damage in transit.
If there are obvious signs of knocks, contact the carrier (you may able to claim on their insurance) and after a visual check, turn the

motor by hand to detect any malfunction.

1.1 - Identication

As soon as you receive the motor, check that the nameplate on the machine conforms to your order.

MOT 3 ~ : 3-phase A.C. motor
LSES : Series
132 : Frame size
S : Housing symbol

Motor no.

123456 : Motor batch number
E : Month of production
11 : Year of production
001 : Serial number
IE2 :Efciencyclass

83.8% :Efciencyat4/4load

IP55 IK08 : Index of protection
I cl. F : Insulation class F
40°C : Ambient operating

temperature

S1 : Duty - Duty (operating) factor
kg : Weight

V : Supply voltage
Hz : Supply frequency
min-1 : Revolutions per minute (rpm)
kW : Rated output power
cos ϕ : Power factor
A : Rated current

Δ : Delta connection

Y : Star connection

Bearings

DE : Drive end bearing
NDE : Non drive end bearing
g : Amount of grease at each

regreasing (in g)

h : Regreasing interval

(in hours)

POLYREX EM103 : Type of grease

A : Vibration level

H : Balancing mode

Denition of symbols used on nameplates:

Legal mark of conformity
of product to the requirements
of European Directives

* Other logos may be used as an optional extra:
This must be agreed prior to ordering.

6

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

ASSEMBLY

1.2 - Storage

Prior to commissioning, machines should be stored in a

horizontal position:

- Away from humidity: at relative humidity levels greater than
90% the machine insulation can drop very rapidly, to just above

zero at around 100%. The state of the anti-rust protection on

unpainted parts should be monitored.
For very long storage periods the motor can be placed in a
sealed package (for example heat-shrunk plastic) containing
sachets of desiccant.

- Away from frequent signicant variations in temperature, to

avoid the risk of condensation. During storage the drain plugs
must be removed to allow condensation water to escape.

- If the area is subject to vibration, try to reduce the effect of this
vibration by placing the motor on a damping support (rubber
plate or similar) and turn the rotor a fraction of a turn once a
fortnight to prevent the bearing rings from becoming marked.

- Do not discard the rotor locking device (where there are roller
bearings).
Even if the motor has been stored in the correct conditions,
certain checks must be carried out before it is started up:

Greasing
Bearings which cannot be regreased

Maximum storage: 3 years. After this time, replace the bearings
(see section 6.3).

Bearings which can be regreased

Grease
grade 2

Grease
grade 3

Storage period

less than
6 months

less than

1 year

The motor can be commissioned
without regreasing.

more than

6 months
less than

1 year

more than

1 year

less than

2 years

Regrease before commissioning,
as described in section 3.1

more than

1 year

less than

5 years

more than

2 years and

less than

5 years

Dismantle the bearing

- Clean it

- Replace the grease completely

more than

5 years

more than

5 years

Change the bearing

- Regrease it completely

Greases used by LEROY-SOMER
(see nameplate): - grade 3: ESSO UNIREX N 3

- POLYREX EM103

2 - ASSEMBLY

Electric motors are industrial products.
They must therefore be installed by

qualied, experienced and authorized personnel. The

safety of people, animals and property must be ensured

when tting the motors into machines (please refer to

current standards).

2.1 - Checking the insulation

Before starting the motor, it is advisable to check
the insulation between the phases and earth,

and between phases.

This check is essential if the motor has been stored for longer
than 6 months or if it has been kept in a damp atmosphere.
This measurement must be carried out using a megohmmeter
at 500V D.C. (do not use a magnetoelectric system).
It is better to carry out an initial test at 30 or 50 volts and if the
insulation is greater than 1 megohm, carry out a second test at
500 volts for 60 seconds. The insulation value must be at least
10 megohms in cold state.
If this value cannot be achieved, or if the motor may have been
splashed with water or salt spray, or kept for a long period in a
very humid place or if it is covered with condensation, it is
advisable to dry the stator for 24 hours in a drying oven at a
temperature of between 110°C and 120°C.
If it is not possible to place the motor in a drying oven:

- Switch on the motor, with the rotor locked, at 3-phase A.C.
voltage reduced to approximately 10% of the rated voltage, for
12 hours (use an induction regulator or a reduction transformer
with adjustable outlets). For slip-ring motors, this test should
be performed with the rotor short-circuited.

- Or supply the 3 phases in series with a D.C. current, with the
voltage at 1 to 2% of the rated voltage (use a D.C. generator
with independent excitation or batteries for motors of less than
22 kW).

- NB: The A.C. current must be monitored using a clamp
ammeter, and the D.C. current using a shunt ammeter. This
current must not exceed 60% of the rated current.
It is advisable to place a thermometer on the motor housing: if
the temperature exceeds 70 °C, reduce the indicated voltage
or current by 5% of the original value for every 10° difference.

While it is drying, all the motor orices must be open (terminal

box, drain holes).

M

Warning: If the high voltage test, carried out at

the factory before dispatch, needs to be repeated,
it should be performed at half the standard voltage, ie.:
1/2 (2U+1000V). Check that the capacitive effect
resulting from the high voltage test is eliminated before
connecting the terminals to earth.

In all cases, compatibility of the motor and its

environment must be guaranteed before its installation
and also throughout its life.

For all insulation or dielectric tests, it is advisable to
earth the thermal probes and/or accessories.

7

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

ASSEMBLY

Prior to commissioning for all motors:

Rotate the motor at no load (no mechanical load)
for 2 to 5 minutes, checking that there is no abnormal
noise. If there is any abnormal noise, see section 5.

2.2 - Location - ventilation

2.2.1 - TEFV motors

Our motors are cooled in accordance with method IC 411
(standard IEC 34-6), i.e. «machine cooled by its surface, using

the ambient uid (air) owing along the machine».

The fan at the non drive end cools the motor. Air is sucked in
through the grille of a fan cover (which provides protection
against the risk of direct contact with the fan in accordance with

standard IEC 34-5) and blown along the housing ns to ensure

thermal equilibrium of the motor whatever the direction of
rotation.

2.2.2 - Drip-proof motors

Location ventilation

Our motors are cooled in accordance with method IC 01
(standard IEC 34-6), ie. «machine cooled by means of the

ambient uid (air) circulating inside the machine».

A fan at the non-drive end cools the motor. Air is sucked in at
the front of the motor and blown along the fan cover to ensure
thermal equilibrium of the motor whatever the direction of
rotation.

H

Ø H
max

air

inlet

The motor must be installed in an adequately ventilated area,

with clearance for the air intake and outlet of at least onequarter

of the frame size.

Obstruction (clogging) - even accidental - of the fan cover grille
has an adverse effect on motor operation.
In the case of vertical operation with the shaft extension facing

down, it is advisable to t the motor with a drip cover to prevent

penetration by any foreign bodies.
It is also necessary to check that the hot air is not being
recycled. If it is, pipes must be provided for the intake of cold
air and the discharge of hot air, in order prevent abnormal
motor temperature rise.
In this case, if the air is not circulated by an auxiliary fan, the
dimensions of the pipes must be such that the pressure losses
are negligible compared to those of the motor.

Positioning

The motor must be mounted in the position specied on

the order, on a base which is rigid enough to prevent
distortion and vibration.

Where the motor feet have six xing holes, it is preferable to

use those which correspond to the standard dimensions for the
motor power rating (refer to the technical catalogue for
induction motors), or, failing that, to those shown at B2.

Ensure there is easy access to the terminal box, the
condensation drain plugs and, if appropriate, to the grease
nipples.
Use lifting equipment which is compatible with the weight of the
motor (indicated on the nameplate).

When the motor is tted with lifting rings, they are

for lifting the motor on its own and must not be

used to lift the whole machine after the motor has been

tted to it.

Note 1: When installing a suspended motor, it is essential

to provide protection in case the xing breaks.

Note 2: Never stand on the motor.

2.3 - Coupling

Preparation

Turn the motor by hand before coupling to detect any possible
fault due to handling.
Remove any protection from the shaft extension.

Drain off any condensation water which may have formed
inside the motor by removing the plugs from the drain holes.

Rotor locking device

For made-to-order motors with roller bearings, remove the
rotor locking device.
In exceptional circumstances when the motor has to be moved

after the coupling device has been tted, the rotor must be re-

immobilised.

1/4 H min

(with a minimum

distance of 25 mm)

H

B

2

B

1

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Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

ASSEMBLY

Balancing

Rotating machines are balanced in accordance with standard
ISO 8821:

- Half-key when the shaft extension is marked H

- No key when the shaft extension is marked N.

- Full key when the shaft extension is marked F.
and any coupling element (pulley, coupling sleeve, slip-ring,
etc) must therefore be balanced accordingly.

Motor with 2 shaft extensions:
If the second shaft extension is not used, in order to
comply with the balancing class, the key or half-key must

be xed rmly in the keyway so that it is not thrown out

during rotation (H or F balancing) and must be protected
against direct contact.

Precautions

All measures must be taken to ensure protection against the
risks which arise when there are rotating parts (coupling
sleeve, pulley, belt etc).

If a motor is started up without a coupling device

having been tted, carefully immobilize the key in

its location.

Beware of backdriving when the motor is switched off. The
appropriate precautions must be taken:

- For pumps, a non-return valve must be installed.

- For mechanical devices, install a backstop or a holding brake.

- etc..

Tolerances and adjustments

The standard tolerances are applicable to the mechanical
characteristics given in our catalogues. They comply fully with the
requirements of IEC standard 72-1.

- Users must adhere strictly to the instructions provided by the
transmission device supplier.

- Avoid impacts which could damage the bearings.
Use a spanner and the tapped hole of the shaft end with a special

lubricant (e.g. molykote grease) to make it easier to t the coupling.

The hub of the transmission device must be:

- Fully in contact with the shoulder of the shaft or, if this is missing,
against the metal stop ring which forms a labyrinth seal and thus
locks the bearing in place (do not crush the seal).

- Longer than the shaft extension (2 to 3 mm) so that it can be
tightened using a screw and washer. If it is not, a spacer ring
must be inserted without cutting the key (if this ring is large, it
must be balanced).

Applied

to shoulder of shaft

Applied

to stop ring

If there is a second shaft extension, it must only be used for
direct coupling and the same recommendations must be
followed.

The 2nd shaft extension may also be smaller than

the main shaft extension, and under no
circumstances can it deliver torques greater than half the
rated torque.

The inertia ywheels device must not be mounted directly
onto the shaft extension, but installed between end shield and
device using a coupling.

Mounting a face mounted motor

Mounting face mounted motors IM B14 (IM 3601) and IM B34
(IM 2101).
Max. screw insertion length when mounting face mounted
motors IM B34 and IM B14.

Max. insertion (mm)

LSES 71 F75 M5 / F85 M6 13
LSES 80 F100 M6 11
LSES 90 F115 M8 11
LSES 100 F130 M8 11
LSES 112 F130 M8 11
LSES 132 F215 M12 11
LSES 160 F215 M12 15

Direct connection onto the machine

When the mobile device (pump or fan turbine) is mounted
directly on the motor shaft extension, check that this device is
perfectly balanced and that the radial force and the axial thrust
are within the limits indicated in the catalogue for the bearing
withstand.

Direct connection using a exible coupling

Selection of the coupling sleeve should take account of the
rated torque to be transmitted and the safety factor dependent
on the starting conditions for the electric motor.
The machines must be carefully aligned, so that any lack of
concentricity and parallelism in the two coupling halves is
compatible with the recommendations of the coupling sleeve
manufacturer.
Both parts of the coupling should be provisionally assembled
to make it easier to alter their relative position.
Adjust the parallel plane of both shafts using a gauge.
Measure the distance between the two coupling surfaces at
one point on the circumference. Rotate them 90°, 180° and
270° in relation to this initial position, and measure each time.

The difference between the two extremes of the value «x»

must not exceed 0.05 mm for standard couplings.

9

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

ASSEMBLY

x

To perfect this adjustment and at the same time check the

concentricity of the two shafts, t 2 gauges as shown in the

diagram and slowly turn both shafts.
The deviations registered by either shaft will indicate the need
for either an axial or radial adjustment if the deviation exceeds

0.05mm.

Direct connection using a rigid coupling

Both shafts must be aligned so as to adhere to the tolerances
of the coupling sleeve manufacturer.
Maintain the minimum distance between the two shaft
extensions to allow for expansion of the motor shaft and the
load shaft.

A

Ø

Ø (mm) A (mm)

min.

9 to 55 1

60 1.5
65 1.5
75 2
80 2

Transmission via belt pulleys

The user can choose the diameter of the pulleys.
Cast iron pulleys with a diameter greater than 315 are not
recommended for rotation speeds of 3000 min

-1

.

Flat belts cannot be used for rotation speeds of 3000 min

-1

or

more.

Positioning the belts

So that the belts can be correctly positioned, allow for
possible adjustment of approximately 3% with respect to the
calculated distance E.

Force must never be used when tting the belts.

For notched belts, position the notches in the pulley grooves

E

Aligning the pulleys

Check that the motor shaft is completely parallel with that of the
receiving pulley.

Protect all rotating devices before power-up.

Adjusting the tension of the belts

The tension of the belts must be adjusted very carefully in
accordance with the recommendations of the belt supplier and

the calculations made when the product was specied.

Reminder:

- Tension too great = unnecessary force on the end shields
which could lead to premature wear of the bearing unit (end
shield-bearings) and eventually break the shaft.

- Too little tension = vibration (wearing of the bearing unit).

Fixed distance between centers:

Place a belt tensioning pulley on the slack side of the belts:

- Smooth pulley on the outside of the belt

- Grooved pulley on the inside of the belts when using V-belts.

Adjustable distance between centers:

The motor is usually mounted on slide rails, which enables
optimum adjustment of the pulley alignment and the belt
tension.

Place the slide rails on a perfectly horizontal baseplate.

The lengthways position of the slide rails is determined by the
length of the belt, and the crossways position by the pulley of
the machine being driven.

Mount the slide rails rmly with the tension screws in the

direction shown in the diagram (the slide rail screw on the belt
side between the motor and the machine being driven).
Fix the slide rails onto the baseplate and adjust the belt tension
as before.

Tension screw

Tension screw

10

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

ASSEMBLY

2.4 - Electrical guidelines

2.4.1 - Limiting problems caused by motor
starting

In order to protect the installation, any signicant temperature
rise in the cabling conduits must be prevented, while ensuring
that the protection devices do not interrupt starting.
Operating problems in other equipment connected to the same
supply are due to the voltage drop caused by the current
demand on starting - many times greater than the current
absorbed by the motor at full load (approximately 7).
See the LEROY-SOMER induction motors technical
catalogue).
Even though the mains supplies increasingly allow D.O.L.
starting, the current inrush must be reduced for certain
installations.
Jolt-free operation and soft starting ensure greater ease of use
and an increased lifespan for the machines being driven.
The two essential parameters for starting cage induction
motors are:

- starting torque

- starting current
The starting torque and the resistive torque determine the
starting time.
Depending on the load being driven, it may be necessary to
adapt the torque and the current to the machine starting time
and to the possibilities of the mains power supply.

The ve essential modes are:

- D.O.L. starting

- Star/delta starting

- Soft starting with autotransformer

- Soft starting with resistors

- Electronic starting

The «electronic» starting modes control the voltage at the

motor terminals during the entire starting phase and enable
very soft, jolt-free starting.

2.4.2 - LEROY-SOMER «Digistart» electronic
starter

This is a multi-function electronic system with a microcontroller,
which is used with all 3-phase cage induction motors.
It provides soft starting of the motor with:

- Reduction of the starting current

- Gradual, jolt-free acceleration, achieved by controlling the
current absorbed by the motor.
After starting, the DIGISTART performs additional motor
control functions in its other operating phases: steady state
and deceleration.

- 18 to 1600 A models

- Supply: 220 to 700 V - 50/60 Hz

DIGISTART is economical to install, as a fused switch is the
only additional device needed.

Optional: Standard slide rails (conforming to standard NFC 51-105)

These steel slide rails are supplied with tension screws and the 4 nuts and bolts for xing the motor on the slide rails, but the xing

bolts for the slide rails are not supplied.

Motor Type Dimensions Weight per pair

frame size of slide rail A E H K L X Y Z Ø J of slide rails (kg)

90 G 90/8 PM 355 395 40 2.5 50 324 264 294 13 3

100, 112 and 132 G 132/10 PM 420 530 49.5 7 60 442 368 405 15 6

160 and 180 G 180/12 PM 630 686 60.5 7 75 575 475 525 19 11
200 and 225 G 225/16 PF 800 864 75 28.5 90 - 623 698 24 16
250 and 280 G 280/20 PF 1000 1072 100 35 112 - 764 864 30 36
315 and 355 G 355/24 PF 1250 1330 125 36 130 - 946 1064 30 60

H

L

Y

Z

X

A

E

K

ØJ

11

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

ASSEMBLY

2.4.3 - Other control systems

Frequency inverters, ux vector control, etc. Special

precautions need to be taken when standard induction motors
are being used for variable speed control, powered by a
frequency inverter or voltage controller:

The reference voltage (drive output or motor

input) is 400V at 50 Hz: The drive must deliver a
constant voltage/frequency signal to the motor in the
50 Hz operating range. Beyond the 25/50 Hz range,
ensure that the fan and bearing unit are suitable.

During prolonged operation at low speed, cooling efciency is

greatly diminished. It is therefore advisable to install a forced

ventilation unit that will produce a constant ow of air

independently of the motor speed.
In prolonged operation at high speed, the fan may make
excessive noise. It is again advisable to install a forced
ventilation system.

1/3

2/3

1

0

1/3 2/3

1

N / Ns

Forced ventilation
(temperature rise)

Natural cooling Forced ventilation

for N > 3600 min

-1

Operating speed/

Synchronous speed

Effect of

cooling

P/PN = f (N/NS)

If the frequency exceeds 50 Hz:

a - Carefully check that all the components on a particular
transmission are properly aligned.

b - The voltage remains constant above 50 Hz.
c - The power supplied by the motor up to 60 Hz remains

constant (make sure that the power absorbed by the load does
not vary differently in this frequency range).
d - Check that the application speed does not exceed the
synchronous speed values:

- 2P --> 3600 min

-1

motors

- 4P --> 1800 min

-1

motors

- 6P --> 1200 min

-1

motors
e - For all other frequency and/or voltage limits, additional
precautions must be taken for derating, bearings, ventilation,
noise, etc: please consult Leroy-Somer.
Check that the vibration level of the assembled machine
complies with standard ISO 10816-3.

The user is responsible for protecting the motor and drive

equipment from hazardous currents and overvoltages in the
winding. These instructions cannot guarantee efciency in all

cases.

2.4.4 - Permissible starting times and locked
rotor times

The starting times must remain within the limits stated below
on condition that the number of starts per hour is 6 or less.
Three successive cold starts and two consecutive warm starts
are allowed.

Permissible motor starting time in relation to the ratio ID / IN.

2.4.5 - Earthing (see section 2.5.5)

2.4.6 - Power factor compensation capacitors

Before any work is carried out on the motor or in

the cabinet, check that the capacitors are
isolated and/or discharged (read the voltage at the
terminals).

2.4.7 - Motor protection devices

2.4.7.1 - On-line protection
Adjusting the thermal protection

It should be adjusted to the value of the current read on the
motor nameplate for the connected mains voltage and
frequency.

Thermal magnetic protection

The motors must be protected by a thermal magnetic device
located between the isolating switch and the motor. These
protection devices provide total protection of the motor against
non-transient overloads.
This device can be accompanied by fused circuit-breakers.

Built-in direct thermal protection

For low rated currents, bimetallic strip-type protection may be
used. The line current passes through the strip, which shuts
down or restores the supply circuit as necessary. The design
of this type of protection allows for manual or automatic reset.

2.4.7.2 - Built-in indirect thermal protection

The motors can be equipped with optional heat sensors.
These sensors can be used to monitor temperature changes
at “hot spots”:

- overload detection

- cooling check

- Monitoring strategic points for maintenance of the installation

25

20

15

Time (s)

10

5

5 6 7

Id/In

8 9 10

Hot startCold start

12

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

ASSEMBLY

It must be emphasized that these sensors cannot be used to carry out direct adjustments to the motor operating cycles.

Type

Operating

principle

Operating

curve

Breaking

capacity (A)

Protection provided

Mounting

Number required*

Normally closed

thermostat

PTO

bimetallic strip,

indirectly heated

operates on opening (0)

I

ONRT

T

I

F

NRT

T

R

NRT

T

V

T

R

T

1.6 at 250 V

with cos ϕ 0.6

general surveillance

for non-transient

overloads

Mounted on control

circuit

2 or 3 in series

Normally open

thermostat

PTF

bimetallic strip,

indirectly heated,

contact on closing (F)

1.6 at 250 V

with cos ϕ 0.6

general surveillance

for non-transient

overloads

Mounted on control

circuit

2 or 3 in parallel

Positive temperature

coefcient thermistor

PTC

Variable non-linear

resistor, indirectly

heated

0

general surveillance

for transient

overloads

Mounted with associated

relay on control circuit

3 in series

Thermocouples

T (T<150°C)

Constantan copper

K (T<1000°C)

Copper Copper-Nickel

Peltier effect 0

continuous
surveillance
at hot spots

at regular intervals

Mounted on control

panels with associated

reading device

(or recording device)

1 per hot spot

Platinum resistance

thermometer

PT 100

Variable linear

resistance,

indirectly heated

0

high accuracy

continuous
surveillance

at key hot spots

Mounted on control

panels with associated

reading device

(or recording device)

1 per hot spot

- NRT: nominal running temperature.

- The NRTs are chosen according to the position of the sensor in the motor and the temperature rise class.
* The number of devices affects the protection of the windings.

Alarm and early warning

All protective equipment can be backed up by another type of

protection (with different NRTs): The rst device will then act as

an early warning (light or sound signals given without shutting
down the power circuits), and the second device will be the
alarm (shutting down the power circuits).

Warning: Depending on the type of protection,

the motor may remain powered-up. Ensure that
the mains supply is disconnected before any work is
carried out in the terminal box or in the cabinet.

Protection against condensation: space heaters

Identication: 1 red label

A glass bre exible resistor is xed on 1 or 2 coil end turns.

This resistor heats the machines when stopped and thus
prevents condensation inside the machines.

Power supply: 230V single-phase unless otherwise specied

by the customer.
If the drain plugs at the bottom of the motor have not been
removed at the time of installation, they must be opened
approximately every 6 months.

Warning: Check that the space heaters are
powered down before any work is carried out in

the terminal box or in the cabinet.

13

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

ASSEMBLY

2.5 - Mains connection

2.5.1 - Terminal box

Placed as standard on the top of the motor near the drive end,
for forms IM B3, B5, B14, the terminal box has IP 55 protection.
Warning: The position of the terminal box cannot be easily

modied, even with anged motors, as the condensation drain

holes must be at the bottom.

Cable gland

The standard position of the cable gland (1) is on the right,
seen from the drive end.

A

Standard
position

Standard

position

2

4

1

3

NB: motors are tted with plugs or a support plate as standard.

Tightening capacity of cable glands

Adapt the cable gland and

its reducer if present to the
diameter of the cable being used.
In order to preserve the motor’s
original IP55 protection, it is
essential to tighten the cable gland seal correctly (so
that it cannot be unscrewed by hand).

When there are several cable glands and some are not
being used, ensure that they are always covered and
tighten them so that they also cannot be unscrewed by
hand.

If the non-standard position of the cable gland has not been

correctly specied on the order, or is no longer suitable, the

symmetrical construction of the terminal box enables it to be
turned in any of the 4 directions except for position (2) on

ange-mounted motors (B5).

A cable gland must never open upwards.
Check that the incoming cables have bends of such a radius as
to prevent water from running into the cable gland.

Type

of cable gland

Ø min. - Ø max. (mm) cable

Polyamide cable

gland

Brass cable gland

ISO M16 5 - 10 5.5 - 9.5
ISO M20 9.5 - 15 8.5 - 13
ISO M25 13 - 19 12 - 17
ISO M32 15 - 25 15 - 22
ISO M40 21 - 32 19.5 - 28
ISO M50 26 - 38 25.5 - 36
ISO M63 31 - 34 33 - 46

Ø mini

Ø maxi

14

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

ASSEMBLY

2.5.2 - Cross-section of the power supply cables

The higher the current, the greater the voltage drop in the
cables (standard NFC 15.100 or end user’s national standard).
The voltage drop should therefore be calculated for the
starting current to see if this is suitable for the application.

If the most important criterion is the starting torque (or starting
time), the voltage drop should be limited to 3% maximum (the
equivalent of a loss of torque of around 6 to 8%).
The chart below can be used to select the conductors according
to the length of the supply cables and the starting current, in
order to limit the voltage drop to 3% maximum.

This table does not allow the installer to dispense with checking the protective systems.

For motors with ying leads, the power supply cable must not be used for handling.

2.5.3 - Connection of the motor-drive unit

When controlling an induction motor by means of a variable
speed drive, certain rules must be adhered to in order to
guarantee correct system performance.
For variable speed applications, follow the recommendations
outlined in the good practice guide for Motor and drive
packages ref. 5626.

1234567891023456789 100 2345 23

45

67891000

10

20

30

40

50

60

70

80

90

100

200

300

400

500

600

700

800

900

1000

Length in m Maximum voltage drop 3 % (3-phase circuits - copper cable)

Current in amps

Starting current

1 1.5 2.5 4 6 10 16 35 50 75 9025

Conductor cross-section

15

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

ASSEMBLY

2.5.4 - Terminal block wiring diagram

All motors are supplied with a wiring diagram in the terminal
box*.
The connector links required for coupling can be found inside
the terminal box.

Single-speed motors are tted with a block of 6 terminals

complying with standard NFC 51 120, with the terminal
markings complying with IEC 34 - 8 (or NFC 51 118).

Particular attention must be paid to the
information on the nameplate in order to choose

the correct type of connection for the supply voltage.

2.5.5 - Direction of rotation

When the motor is powered by U1, V1, W1 or 1U, 1V, 1W from
a direct mains supply L1, L2, L3, it turns clockwise when seen
from the drive end.
If 2 phases of the power supply are changed over, the motor
will run in an anti-clockwise direction (make sure the motor has
been designed to run in both directions of rotation).
Warning: motor with backstop: starting in the wrong direction
destroys the backstop (see arrow on motor housing).

If the motor is tted with accessories (thermal protection or

space heater), these should be connected on screw dominos
or terminal blocks with labelled wires (see section 2.4).

Temperature probe

2.5.6 - Earth terminal

This is situated inside the terminal box; in some cases, the
earth terminal may be situated on one of the feet or on one of

the cooling ns (round motors).

It is indicated by the symbol:

It is compulsory to earth the motor. Earthing
must be performed in accordance with current

regulations (protection of workers).

* If required, this diagram should be obtained from the supplier,
specifying the motor type and number (shown on the motor
nameplate).

2.5.7 - Connecting the power supply cables to
the terminal block

The cables must be tted with connectors suitable for the cable

cross-section and the terminal diameter.
They must be crimped in accordance with the connector
supplier’s instructions.
Connection must be carried out with connector resting on
connector (see the diagrams below):

Tightening torque (N.m) on the terminal block nuts

Terminal M4 M5 M6 M8 M10 M12 M14 M16

Steel 1 2.5 4 10 20 35 50 65

Brass 1 2 3 6 12 20 - 50

If using cables without connectors, attach some calipers.
If any nuts on the brass terminal block are lost, they must be
replaced by brass nuts, not steel ones.
When closing the box, ensure that the seal is correctly
positioned.

As a general rule, check that no nut, washer or
other foreign body has fallen into or come into

contact with the winding.

16

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

ROUTINE MAINTENANCE

PERMANENTLY GREASED BEARINGS

Under normal operating conditions, the service life (L

10h

) in hours of the lubricant is indicated in the table below for ambient

temperatures less than 55°C.

Series Type

No. of
poles

Types of permanently

greased bearing

Grease life according to speed of rotation

3000 rpm 1500 rpm 1000 rpm

N.D.E. D.E. 25°C 40°C 55°C 25°C 40°C 55°C 25°C 40°C 55°C

LS/LSES

80 L 2 6203 CN 6204C3 ≥40000 ≥40000 25000 - - - - - -
80LG 2;4

6204C3 6205 C3 ≥40000 ≥40000 24000 ≥40000 ≥40000 31000

- - -

90 SL/L 2;4;6 ≥40000 ≥40000 34000
90 LU 4 6205 C3 6205 C3 - - - ≥40000 ≥40000 30000 - - -
100 L 2;4;6

6205 C3 6206 C3

≥40000 ≥40000 22000

≥40000 ≥40000 30000

≥40000 ≥40000 33000

100 LR 4 - - - - - -
112 M 2

6205 C3 6206 C3 ≥40000 ≥40000 22000 - - -

- - -

112 MG 2 ; 6 ≥40000 ≥40000 33000
112 MU 4 6206 C3 6206 C3 - - - ≥40000 ≥40000 30000 - - -
132 S 2 ; 6

6206 C3 6208 C3 ≥40000 ≥40000 19000

- - - ≥40000 ≥40000 30000

132 SU 2;4 ≥40000 ≥40000 25000 - - -
132 SM/M 2;4;6 6207 C3 6308 C3 ≥40000 ≥40000 19000 ≥40000 ≥40000 25000 ≥40000 ≥40000 30000
132 MU

4;6

6307 C3 6308 C3 - - - ≥40000 ≥40000 25000 ≥40000 ≥40000 30000

160 MR 2;4 6308 C3 6309 C3 ≥40000 35000 15000 ≥40000 ≥40000 24000 - - -
160 MP 2; 4 6208 C3 6309 C3 ≥40000 35000 18000 ≥40000 ≥40000 24000 - - -
160 M/MU 6

6210 C3 6309 C3

- - - - - ­≥40000 ≥40000 27000

160 L 2;4 ;6 ≥40000 30000 15000 ≥40000 ≥40000 23000
160 LUR 4; 6

6210 C3 6310 C3

- - -

≥40000 ≥40000 23000

≥40000 ≥40000 27000

180 MT 2 ;4

≥40000 30000 15000 - - -

180 M 4

6212 C3 6310 C3 - - -

≥40000 ≥40000 24900 - - -

180 L 6 - - - ≥40000 ≥40000 28000
180 LR 4

6210 C3 6310 C3 - - - ≥40000 ≥40000 23000 - - -

180 LUR 4; 6

6312 C3 6310 C3 - - - ≥40000 ≥40000 22000 ≥40000 ≥40000 27000

200 L 2 ; 6

6214C3 6312 C3 ≥40000 25000 12500 - - - ≥40000 ≥40000 27000

200 LR 2;4 ;6

6312 C3 6312 C3

≥40000 25000 12500

≥40000 ≥40000 22000 ≥40000 ≥40000 27000

200 LU

4;6 - - -

225 ST 4

6214C3 6313 C3

- - - ≥40000 ≥40000 21000

- - -

225 MT 2 ≥40000 22000 11000 - - -
225 SR 4

6312 C3 6313 C3

- - -

≥40000 ≥40000 21000

- - -

225 MR 2;4;6 ≥40000 22000 11000 ≥40000 ≥40000 26000
225 SG 4

6216 C3 6314C3 - - - ≥40000 ≥40000 20000

- - -

225 MG 4;6 ≥40000 ≥40000 25000

Note: on request, all motors can be tted with grease nipples except the 132 S/SU.

3 - ROUTINE MAINTENANCE

Checks after start-up

After approximately 50 hours’ operation, check that the screws

xing the motor and the coupling device are still tight.

In the case of chain or belt transmission, check that the tension
is correctly adjusted.

Cleaning

To ensure the motor operates correctly, remove any dust or
foreign bodies which might clog the cover grille and the housing

ns.

Precaution: before carrying out any cleaning operation check
that the motor is completely sealed (terminal box, drain holes,
etc).
Dry cleaning (vacuuming or compressed air) is always
preferable to wet cleaning.

Always clean at reduced pressure from the center
of the motor towards the extremities to avoid

introducing dust and particles under the seals.

Draining off condensation water

Temperature variations cause condensation to form inside
the motor, which must be removed before it adversely affects
motor operation.

Condensation drain holes, located at the bottom of the motors
(bearing in mind their operating position) are sealed with plugs
which must be removed and then replaced every six months (if
they were not replaced, the motor degree of protection would

no longer be maintained). Clean the orices and plugs before

reassembling them.

Note: In conditions of high humidity and signicant temperature

variations, a shorter period is recommended.
As long as it poses no risk to the motor protection, the
condensation drain plugs can be removed.

3.1 - Greasing

3.1.1 - Type of grease

When the bearings are not greased for life, the type of grease
is indicated on the nameplate.
As standard this grease is Polyrex EM103 and we recommend
that it is used for subsequent lubrication.

Avoid mixing greases.

3.1.2 - Permanently greased bearings

For LS/LSES and FLS/FLSES ≤ 225 motors, the bearings

dened offer long grease life and therefore lubrication for the

lifetime of the machines. The grease life according to speed of
rotation and ambient temperature is shown on the chart below.

17

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

ROUTINE MAINTENANCE

Series Type

No. of
poles

Types of permanently

greased bearing

Grease life according to speed of rotation

3000 rpm 1500 rpm 1000 rpm

N.D.E. D.E. 25°C 40°C 55°C 25°C 40°C 55°C 25°C 40°C 55°C

FLS/FLSES

80 L 2 6203 CN 6204C3

≥40000 ≥40000 25000 - - - - - -

80 LG

4

6204C3 6205 C3

- - ­≥40000 ≥40000 31000

- - -

90 SL/L

2;4 ;6

≥40000 ≥40000

24000

≥40000 ≥40000

34000

90 LU

2 ; 6

6205 C3 6205 C3 ≥40000 ≥40000 24000 - - - ≥40000 ≥40000

34000

100 L

2;4

6205 C3 6206 C3

≥40000 ≥40000 22000

≥40000 ≥40000 30000

- - -

100 LG

4;6

- - -

≥40000 ≥40000 33000

112 MG

2 ; 6

≥40000 ≥40000 22000 - - -

112 MU

4

6206 C3 6206 C3 - - - ≥40000 ≥40000 30000 - - -

132 SM/M

2;4 ;6

6207 C3 6308 C3 ≥40000 ≥40000 19000 ≥40000 ≥40000 25000 ≥40000 ≥40000 30000

132 MU 2;4 6307 C3 6308 C3 ≥40000 ≥40000 19000 ≥40000 ≥40000 25000 - - -

132 MR 4;6

6308 C3 6308 C3 - - - ≥40000 ≥40000 25000 ≥40000 ≥40000 30000

160 M

2;4 ;6

6210 C3 6309 C3

≥40000 37800 18900 ≥40000 ≥40000 36900

≥40000 ≥40000 20050

160 MU 6 - - - - - -

160 LUR 2 ;4; 6 6210 C3 6310 C3 ≥40000 24500 12250 ≥40000 36400 18200 ≥40000 ≥40000 22450

180 M 2 6212 C3 6310 C3 34000 17000 8500 - - - - - -

180 MT 4 6210 C3 6310 C3 - - - ≥40000 35500 17750 - - -

180 MUR 2 6312 C3 6310 C3 ≥40000 22800 11400 - - - - - -

180 L 4; 6 6212 C3 6310 C3 - - - ≥40000 39500 19750 ≥40000 ≥40000 29050

180 LUR 4 ;6 6312 C3 6310 C3 - - - ≥40000 ≥40000 22900 ≥40000 ≥40000 29900

200 LU 2;4;6 6312 C3 6312 C3 28600 14300 7150 ≥40000 25400 12700 ≥40000 33200 16600

225 S 4 6314C3 6314C3 - - - ≥40000 23700 11850 - - -

225 SR 4 6312 C3 6313 C3 - - - ≥40000 ≥40000 21500 - - -

225 M 4;6 6314C3 6314C3 - - - ≥40000 23700 11850 ≥40000 25600 12800

225 MR 2 6312 C3 6313 C3 ≥40000 22800 11400 - - - - - -

Note: on request, all motors can be tted with grease nipples.

18

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

ROUTINE MAINTENANCE

3.1.3 - Bearings with grease nipples

The bearings are lubricated in the factory

The end shields are tted with bearings lubricated by grease

nipples such as Tecalemit-Hydraulic M8 x 125.

The frequency of lubrication and the quantity and

quality of grease are given on the nameplates and
these should be referred to in order to ensure correct
bearing lubrication.

Even in the event of prolonged storage or
downtime, the interval between 2 greasing

operations should never exceed 2 years.

Series Type

No. of
poles

Type of bearing for

bearings with grease nipples

Quantity

of grease

Greasing intervals in hours

3000 rpm 1500 rpm 1000 rpm

N.D.E. D.E.

g

25°C 40°C 55°C 25°C 40°C 55°C 25°C 40°C 55°C

LS/LSES

160 M/MU*

2;4 ;6 6210 C3 6309 C3 13 22200 1110 0 5550 32400 16200 8100 39800 19900 9950

160 L*

180 MR* 2

6210 C3 6310 C3 15

19600 9800 4900

- - -

- - -180 MT* 2 ;4

30400 15200 7600

180 LR* 4 - - -

180 LUR* 4 ;6 6312 C3 6310 C3 20 - - - 26800 13400 6700 35000 17500 8750

180 M* 4

6212 C3 6310 C3 15 - - -

29200 14600 7300 - - -

180 L* 6 - - - 37200 18600 9300

200 LR* 2; 4;6

6312 C3 6312 C3 20

15200 7600 3800

26800 13400 6700 35000 17500 8750

200 LU* 4;6 - - -

200 L* 2 ; 6 6214C3 6312 C3 20 14600 7300 3650 - - - 34600 17300 8650

225 ST* 4

6214C3 6313 C3 25

- - - 25200 12600 6300

- - -

225 MT* 2 10600 5300 2650 - - -

225 SR/MR* 2;4;6 6312 C3 6313 C3 25 13400 6700 3350 25200 12600 6300 33600 16800 8400

225 SG* 4

6216 C3 6314C3 25 - - - 23600 11800 5900

- - -

225 MG* 4;6 32200 16100 8050

250 MZ 2 6312 C3 6313 C3 25 13400 6700 3350 - - - - - -

250 ME 4;6

6216 C3 6314C3 25

- - - 16800 8400 16800 22800 11400 5700

280 SC/MC 2 11800 5900 2950 - - - - - -

280 SC 6 6216 C3 6316 C3 35 - - - - - - 32200 16100 8050

280 SD/MD 4; 6 6218 C3 6316 C3 35 - - - 1900 3800 7600 29600 14800 7400

315 SN 2 6216 C3 6316 C3 35 5600 2800 1400 - - - - - -

315 MP 2 6317 C3 6317 C3 40 5200 2600 1300 - - - - - -

315 SP 4

6317 C3 6320 C3 50 - - - 14000 7000 14000

- - -

315 MP/MR 4;6 21200 10600 5300

* bearing with grease nipple available to order

19

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

ROUTINE MAINTENANCE

Series Type

No. of
poles

Type of bearing for

bearings with grease nipples

Quantity

of grease

Greasing intervals in hours

3000 rpm 1500 rpm 1000 rpm

N.D.E. D.E.

g

25°C 40°C 55°C 25°C 40°C 55°C 25°C 40°C 55°C

FLS/FLSES

160 M* 2;4;6

6210 C3 6309 C3 13

22200 11100 5550 32400 16200 8100 39800 19900 9950

160 MU 6 - - - - - - 23400 11700 5850

160 LUR* 2;4 ;6 6210 C3 6310 C3 15 19600 9800 4900 30400 15200 7600 38200 19100 6600

180 M* 2 6212 C3 6310 C3 15 18000 9000 4500 - - - - - -

180 MT* 4 6210 C3 6310 C3 15 - - - 30400 15200 7600 - - -

180 MUR* 2 6312 C3 6310 C3 15 10600 5300 2650 - - - - - -

180 L* 4; 6 6212 C3 6310 C3 20 - - - 29200 14600 7300 37200 18600 9300

180 LUR* 4 ;6 6312 C3 6310 C3 20 - - - 26800 13400 6700 35000 17500 8750

200 LU* 2;4;6 6312 C3 6312 C3 20 15200 7600 3800 26800 13400 6700 35000 17500 8750

225 S* 4 6314C3 6314C3 25 - - - 23600 11800 5900 - - -

225 SR* 4 6312 C3 6313 C3 25 - - - 25200 12600 6300 - - -

225 M* 4;6 6314C3 6314C3 25 - - - 23600 11800 5900 32200 16100 8050

225 MR* 2 6312 C3 6313 C3 25 13400 6700 3350 - - - - - -

250 M 2 ; 6

6314C3 6314C3 25

10400 5200 2600 - - - 32200 16100 8050

250 MR 4 - - - 17800 8900 4450 - - -

280 S/M 2;4;6 6314C3 6316 C3 35 7200 3600 1800 21000 13230 6615 29000 29000 18270

315 S/M/L 2 6316 C3 6218 C3 35 7400 5880 2920 - - - - - -

315 S/M/L 4;6 6316 C3 6320 C3 50 - - - 15600 12400 6160 25000 25000 12500

355 L 2 6316 C3 6218 C3 35 7400 3700 1850 - - - - - -

355 L 4 ;6 6316 C3 6322 C3 60 - - - 13200 8316 4160 22000 13860 6930

355 LK 4;6 6324C3 6324C3 72 - - - 7500 3700 2800 20000 20000 10000

400 L/LV 4;6 6324C3 6324C3 72 - - - 7500 3700 2800 20000 20000 10000

400 LK/ 450 L 4; 6 6328 C3 6328 C3 93 - - - 4600 2300 1100 10000 6000 3000

* bearing with grease nipple available to order

Series Type

No. of

poles

Type of bearing for

bearings with grease nipples

Quantity

of grease

Greasing intervals in hours

3000 rpm 1500 rpm

N.D.E. D.E.

g

25°C 40°C 55°C 25°C 40°C 55°C

PLS/PLSES

225 MG

2;4

6314C3 6317 C3 40 8000 4000 2000 19600 9800 4900

250 SF

250 MF

280 MD 2

280 SGU 4

6316 C3 6320 C3 50

- - - 15800 7900 3950

280 MGU 4

315 SUR 4

315 LUS 4

315 SU 2

9000 4500 2250 - - -

315 MU 2

315 L 2 6316 C3 6316 C3 35 9000 4500 2250 - - -

315 LD 2 6316 C3 6219 C3 35 8000 4000 2000 - - -

315 LG/MGU

2 6317 C3 6317 C3 35 6500 6500 4095 - - -

4 6317 C3 6322 C3 55 - - - 13200 13200 8316

315 VLG/VLGU

2 6317 C3 6317 C3 35 6500 6500 4095 - - -

4 6317 C3 6322 C3 55 - - - 13200 13200 8316

355 L

2 6317 C3 6317 C3 35 6500 6500 4095 - - -

4 6324C3 6324C3 72 - - - 7500 3700 2800

400 L 4 6328 C3 6328 C3 93 - - - 4600 2300 1100

* bearing with grease nipple available to order

20

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

PREVENTIVE MAINTENANCE

3.2 - Bearing maintenance

3.2.1 - Checking the bearings

As soon as you detect any of the following on the motor:

- Abnormal noise or vibration

- Abnormal temperature rise in the bearing even though it has
been lubricated correctly,
the condition of the bearings must be checked.
Damaged bearings must be replaced as soon as possible
to prevent worse damage to the motor and the equipment
being driven.
If one bearing needs to be replaced, the other bearing must

also be replaced.
The seals should be changed routinely when the bearings

are changed.
The free bearing must allow the rotor shaft to expand (check its
identication during dismantling).

3.2.2 - Reconditioning the bearings

Bearings without grease nipples

Dismantle the motor (see section 6.1); remove the old grease
and clean the bearings and accessories with degreasing
agent.
Fill with new grease: the correct amount of new grease for the
bearing is 50% of the free space.

Bearings with grease nipples
Always begin by cleaning the waste grease channel

If using the type of grease stated on the nameplate, remove the
covers and clean the grease nipple heads.
If a different grease from that on the nameplate is being used,
the motor must be dismantled and the bearings and accessories
cleaned with degreasing agent (carefully clean the grease inlet
and outlet pipes) to remove the old grease before relubrication.

To ensure correct lubrication, ll the inner free spaces of the
bearing retainers, anges and grease pipes and 30% of the

bearing free space.
Then rotate the motor shaft to distribute the grease.

Warning:

Too much grease causes the bearing to overheat (statistics
show that more bearings are damaged through too much
grease than too little grease).

Important note:

The new grease should be recently manufactured, of equivalent
performance and should not contain any impurities (dust,
water, etc).

4 - PREVENTIVE MAINTENANCE

Please consult LEROY-SOMER who, in its continuous search
for ways to help customers, has evaluated numerous methods
of preventive maintenance.
The diagram and table below give the recommended
equipment to use and the ideal positions to take measurements
of all parameters which can affect the operation of the machine,
such as eccentricity, vibration, state of bearings, structural
problems, electrical problems, etc.

M 01V M 02V

M 02

A

M 02HM 01H

1

3

4

2

5

Detector Measurement

Measurement points

M 01V M 01H M 02V M 02H M 02A Shaft E01 E02 E03



Accelerometer

For measuring vibrations

• • • • •



Photo-electric cell

For measuring speed and phase
(balancing)

•

Clamp ammeter

For measuring current
(D.C. and 3-phase)

• • •



Voltage probe

For measuring voltage

• • •

Infra-red probe

For measuring temperature

• •

21

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

TROUBLESHOOTING GUIDE

5 - TROUBLESHOOTING GUIDE

Incident Possible cause Remedy

Abnormal noise Originating in motor or machine being driven? Uncouple the motor from the equipment being driven

and test the motor on its own

Noisy motor

The cause is mechanical if the noise persists after
switching off the power supply, with the drive set to

«freewheel» mode

- vibration - check that the key conforms to the type of
balancing (see section 2.3)

- damaged bearings - change the bearings

- mechanical friction: ventilation, coupling

- check and replace the defective part

The cause is electrical if the noise stops after
switching off the power supply

- check the power supply at the motor terminals

- check the drive settings

- normal voltage and 3 phases balanced - check the connection of the terminal block and
the tightening of the terminals

- abnormal voltage - check the power supply line

- phase imbalance - check the winding resistance

Other possible causes:

- incorrect settings

- drive malfunction

- refer to the drive manual

Motor heats abnormally

- faulty ventilation - check the environment

- clean the fan cover and the cooling ns

- check that the fan is correctly mounted on the shaft

- faulty supply voltage - check

- terminal connection fault - check

- overload - check the current consumption in relation to that
indicated on the motor nameplate

- partial short-circuit - check the electrical continuity of the windings and/or
the installation

- phase imbalance - check the winding resistance

Other possible causes:

- incorrect settings

- drive malfunction

- refer to the drive manual

Motor does not start at no load

- mechanical locking

When switched off:

- check that rotation of the shaft is locked

- broken power supply line - check the fuses, electrical protection, starting
device

- position feedback (drive message) - check the drive wiring and settings, operation of the
position sensor

- thermal protection - check

on load

- phase imbalance

When switched off:

- check the direction of rotation (phase order)

- check the resistance and continuity of the windings

- check the electrical protection

- drive - check the settings and sizing (max. current that can
be delivered by the drive)

- position feedback (drive message) - check the drive wiring and settings, operation of the
position sensor

- thermal protection - check

22

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

CORRECTIVE MAINTENANCE: GENERAL

6 - CORRECTIVE MAINTENANCE:
GENERAL

First switch off and lock the power supply

- Open the terminal box, mark the wires and their positions

- Disconnect the power supply wires

- Uncouple the motor from the equipment being driven
Always use an extractor to remove any devices mounted on
the shaft end of the motor.

6.1 - Dismantling the motor

Refer to the detailed instructions for the relevant motor range
(see following pages).
It is advisable to mark the shields in relation to the stator and
the direction in which the rotor fan is mounted.

6.2 - Checks before reassembly

Stator:

- Remove all dust from the stator:
If the winding needs to be cleaned, a suitable liquid must be
used: dielectric and inert on the insulating components and the

external nish.

- Check the insulation (see section 2.1) and if necessary, dry it
in an oven.

- Clean the spigots thoroughly, and remove all traces of knocks
on the mating surfaces if necessary.

Rotor:

- Clean and check the bearing running surfaces. If they are
damaged, renew the running surfaces or change the rotor.

- Check the condition of the threads, keys and their housings.

End shields:

- Clean off any traces of dirt (old grease, accumulated dust,
etc).

- Clean the bearing housings and the spigot.

- If necessary, apply anti-ash varnish to the insides of the end

shields.

- Carefully clean the bearing retainers and the grease valves (if

these are tted on the motor).

6.3 - Mounting the bearings on the shaft

This operation is extremely important, as the slightest
indentation of a ball on the bearing tracks would cause noise
and vibration.
Lightly lubricate the running surfaces of the shaft.
There are a number of ways of mounting the bearings correctly:

- Cold state: The bearings must be mounted without any
impact, using a spanner (do not use a hammer). The force
applied must not be transferred to the bearing track. You should
therefore use the internal cage for support (taking care not to
press on the seal shield for sealed bearings).

- Hot state: Heat the bearing to between 80 and 100 °C: in a
dryer, an oven or on a heating plate. (A blowtorch or an oil bath
must never be used).
After dismantling and reassembling a bearing, all the spaces

between the seals and labyrinth seals must be lled with

grease in order to prevent the entry of dust and the rusting of
machined parts.
See detailed instructions for the relevant motor ranges in the
following pages.

6.4 - Reassembling the motor

Be careful to replace the stator in its original position, that

the stack of laminations is centered correctly (generally with
the terminal box facing forward) and the water drain holes are
positioned correctly if they are on the housing.

Tightening the tie rods/screws

These must be tightened diagonally, to the torque indicated
(see below).

14

32

Tie rods/screws tightening torque

Type Rod/screw Ø

Tightening torque

N. m ± 5%
56 M4 2.5
63 M4 2.5
71 M4 2.5
80 M5 4
90 M5 4
100 M5 or M6 4
112 M5 or M6 4
132 M7 10
160 M8 18
180 MT/LR/LUR M8 18
180 L M10 25
200 M10 25
225 ST/MR/SR M10 25
225 MK M12 44
250 M12 44
280 M12 44
315 M12 44
315 LK / 355 M16 100
355 LK / 400 M16 100
450 M16 100

6.5 - Reassembling the terminal box

Reconnect all the power supply wires in accordance with the
diagram or markings made before dismantling.
To ensure the box is properly sealed: check that the cable
glands on the box and the cable(s) have been retightened, and
ensure that the seal has been correctly positioned before
closing. For terminal boxes equipped with a horn (part no. 89
on the exploded views) or/and a cable gland support plate,
ensure that the seal has been correctly positioned before
closing. Check that the terminal box components are tightened
correctly.

Note: It is advisable to test the motor at no load

- If necessary, repaint the motor.

- Mount the transmission device on the motor shaft extension
and reinstall the motor on the machine to be driven.

23

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

POSITION OF LIFTING RINGS

7 - POSITION OF LIFTING RINGS

Position of lifting rings for lifting the motor only
(not connected to the machine).

Labour regulations stipulate that all loads over 25 kg must be

tted with lifting devices to facilitate handling.

The positions of the lifting rings and the minimum dimensions
of the loading bars are given below in order to help with
preparation for handling the motors. If these precautions are
not followed, there is a risk of warping or crushing some
equipment such as the terminal box, protective cover or drip
cover.

Motors intended for use in the vertical position

may be delivered on a pallet in the horizontal
position. When the motor is pivoted, the shaft must under
no circumstances be allowed to touch the ground, as the
bearings may be irreparably damaged. Moreover,
additional special precautions must be taken, as the
integral motor lifting rings are not designed for pivoting
the motor.

• Horizontal position

Type

Horizontal position

A e min h min Øt

LSES 100 L/LR/LG 165 165 150 9

LSES 112 M/MR 165 165 150 9
LSES 112 MG/MU - - - 9
LSES 132 S/SU 180 180 150 9
LSES 132 M/MU 200 180 150 14
LSES 160 MP/MR/LR 200 180 110 14
LSES 160 M/MU/L/LUR 200 260 150 14
LSES 180 M/MUR/L/LUR 200 260 150 14
LSES 200 L/LR 270 260 150 14
LSES 200 LU 270 260 150 14
LSES 225 SR/MR 270 260 150 14
LSES 225 S/SG/M/MG 360 380 200 30
LSES 250 MZ 360 380 200 30
LSES 250 ME 400 400 500 30
LSES 280 SC/SD/MC/MD 400 400 500 30
LSES 315 SN 400 400 500 30
LSES 315 SP/MP/MR 360 380 500 17

Type

Horizontal position

A e min h min Øt

FLSES 100 152 200 150 22

FLSES 100 LG 145 200 150 22
FLSES 112 145 200 150 22
FLSES 132 180 200 150 25
FLSES 160 M/MU 200 260 150 14
FLSES 180 M/MUR/L/LUR 200 260 150 14
FLSES 200 LU 270 260 150 14
FLSES 225 SR/MR 270 260 150 14
FLSES 225 S/M 360 380 200 30
FLSES 250 M/MR 360 380 200 30
FLSES 280 360 380 500 30
FLSES 315 S/M/LA/LB 440 400 500 60
FLSES 355 545 500 500 60

FLSES/FLS 355LK 685 710 500 30

FLS 400 735 710 500 30

FLS 450 730 710 500 30

Type

Horizontal position

A e min h min Øt

PLSES 225 MG 310 300 300 30

PLSES 250 MF/SF 310 300 300 30
PLSES 280 MD/MGU/SGU 310 300 300 30
PLSES 315 SUR/MUR/L/LD/LUS 385 380 500 30

PLSES/PLS 315 LG/MGU/VLG/VLGU 450 750 550 48

e

A

h

2 x Øt

24

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

SPARE PARTS

• Vertical position

Type

Vertical position

C E D n** ØS e min* h min

LSES 160 M/MU/L/LUR 320 200 230 2 14 320 350

LSES 180 MR 320 200 230 2 14 320 270
LSES 180 M/L/LUR 390 265 290 2 14 390 320

LSES 200 L/LR 410 300 295 2 14 410 450

LSES 200 LU 410 300 295 2 14 410 450
LSES 225 SR/MR 480 360 405 4 30 540 350
LSES 225 S/SG/M/MG 480 360 405 4 30 500 500
LSES 250 MZ 480 360 405 4 30 590 550
LSES 250 ME 480 360 405 4 30 500 500
LSES 280 SC/SD/MC/MD 480 360 405 4 30 500 500
LSES 315 SN 480 360 405 4 30 500 500
LSES 315 SP/MP/MR 630 - 570 2 30 630 550

Type

Vertical position

C E D n** ØS e min* h min

FLSES 160 M/MU 320 200 230 2 14 320 350

FLSES 180 M/MUR/L/LUR* 320 200 230 2 14 320 270
FLSES 200 LU 410 300 295 2 14 410 450
FLSES 225 SR/MR 410 300 295 2 14 410 450
FLSES 225 S/M 480 360 405 4 30 540 350
FLSES 250 M/MR 480 360 405 4 30 590 550
FLSES 280 S 480 360 585 4 30 590 550
FLSES 280 M 480 360 585 4 30 590 550
FLSES 315S/ M/LA/LB 620 - 715 2 35 650 550
FLSES 355 760 - 750 2 35 800 550

FLSES/FLS 355 LK 810 350 1135 4 30 810 600

FLS 400 810 350 1135 4 30 810 600

FLS 450 960 400 1170 4 30 960 750

Type

Vertical position

C E n** ØS e min* h min

PLSES 180 LG/LGU 430 270 2 14 430 450

PLSES 200 M/LU/LR 400 280 2 14 400 450
PLSES 225 MG 450 310 2 14 450 490
PLSES 250 SP/MP/MF 450 310 4 30 450 490
PLSES 280 SD 450 310 4 30 450 490
PLSES 280 MD/MG 450 310 4 30 450 490
PLSES 315 S/SUR 500 385 4 30 500 500
PLSES 315 M/MUR/L/LD/LDS/LU 500 385 4 30 500 500
PLSES 315 MG/MGU/LG 750 450 4 48 750 450

* if the motor is tted with a drip cover, allow an additional 50 to 100 mm to
avoid damaging it when the load is swung.

** if n = 2, the lifting rings form an angle of 90° with respect to the terminal box
axis. if n = 4, this angle becomes 45°.

8 - SPARE PARTS

When ordering spare parts, you must indicate the
complete motor type, its serial number and the information
given on the nameplate (see section 1).

Part numbers can be found on the exploded views and
their descriptions in the parts list (section 6).

In the case of ange mounted motors, indicate the type of
ange and its dimensions (see below).

LA T

N

P

J6

M

n Ø S

T

N

P

J6

M

n Ø M.S

IM 3001 (IM B5)

IM 3601 (IM B14)

Our extensive network of service centers can dispatch the
necessary parts without delay.

To ensure that our motors operate correctly and safely, we
recommend the use of original manufacturer spare parts.

In the event of failure to comply with this advice, the
manufacturer cannot be held responsible for any damage.

9 - RECYCLING

At the end of life, we advise that you contact a salvage company
to recycle the various motor components.

e

h

n x ØS

D

E

C

View from above Side view

25

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

RECYCLING

DISMANTLING AND REASSEMBLY PROCEDURES

10 - LS/LSES motors

.........................................................................................................

26 to 35

11 - FLS/FLSES motors ..................................................................................................36 to 45

12 - PLS/PLSES motors

.................................................................................................46 to 51

26

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

LS/LSES MOTORS

10 - LS/LSES MOTORS

10.1 - LS/LSES 71 to 160 MP/LR motors

10.1.1 - Dismantling

- Remove the screws (27) and then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 levers (for
example, 2 screwdrivers) diametrically opposed to one
another, using the shield (6) for support.

- Remove the tie rods (14).

- Remove the key (21).

- Using a wooden mallet, tap the shaft on the fan side in order
to loosen the drive end shield (5).

- Remove the rotor shaft (3) and the DE shield (5) taking care
not to knock the winding.

- Remove the shield on the fan side (6).

- Take out the preloading washer (59) and the seal of the NDE
shield (54) for LS/LSES 100, 112 and 132 motors.

- Remove the circlip (60) from anged motors using angled

circlip pliers.

- Separate the DE shield from the rotor shaft.

- The shaft can then be seen with its 2 bearings and, if
appropriate, the circlip.
Use a bearing remover to take out the bearings, taking care not
to knock the running surfaces of the shaft.

10.1.2 - Reassembling motors without circlip

- Mount the bearings on the rotor shaft.

- Insert the rotor into the stator taking all possible precautions
not to knock the winding.

- Mount the DE shield (5).

- For LS/LSES 71 motors, mount the seal (39) with grease
beforehand.

- Place the preloading washer (59) in the bearing housing, then
mount the NDE shield (6).

- Place the tie rods (14) in position and tighten the nuts
diagonally up to the recommended torque (see section 6.4).

- Mount the shield seals (39, 54, 308) with grease.

- Mount the fan (7) using a drift to bed it into position.

- Check that the motor turns freely by hand and that there is no
radial play.

- Replace the cover (13) and x it with the screws (27).

10.1.3 - Reassembling motors with ange and
circlip

- Mount the DE bearing (30) in the ange (5) using the outer

slip-ring for support.

- Fit the circlip (60).

- Mount this assembly on the rotor (3) using the inner slip-ring
for support.

- Mount the NDE bearing on the rotor.

- Insert the rotor (3) and shield (5) assembly in the stator taking
care not to knock the winding.

- Place the preloading washer (59) in the bearing housing, then
mount the NDE shield (6).

- Place the tie rods (14) in position and tighten the nuts
diagonally up to the recommended torque (see section 6.4).

- Mount the shield seals (39, 54, 308) with grease.

- Mount the fan (7) using a drift to bed it into position.

- Check that the motor turns freely by hand and that there is no
axial play.

- Replace the cover (13) and x it with the screws (27).

- Replace the key (21).

6 5

397

59

50 30

6 5

39

30

7

59 60

50

59 56

308

7

50

30

6 5

3950

30

7

59 60

6 5

30854

59

50 30

6 5

3950 3054

59 60

6 5

30854

59

50 30

6 5

3950 3054

59 60

LS/LSES 71

foot mounted

LS/LSES 71

flange mounted (or foot/flange)

LS/LSES 80 - 90

foot mounted

LS/LSES 80 - 90

flange mounted (or foot/flange)

LS/LSES 100 - 112 - 132

foot mounted

LS/LSES 100 - 112 - 132

flange mounted (or foot/flange)

LS/LSES 160 MP/LR

foot mounted

LS/LSES 160 MP/LR

flange mounted (or foot/flange)

NDE DE NDE DE

NDE DE NDE DE

NDE DE NDE DE

NDE DE NDE DE

27

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

LS/LSES MOTORS

LS/LSES 71 to 160 MP/LR

LS/LSES 71 to 160 MP/LR

Ref. Description Ref. Description Ref. Description

1

Wound stator

21

Drive end shield shaft extension key

60

Circlip

2

Frame

26

Nameplate

71 a

Plastic terminal box (< or = frame size 112)

3

Rotor

27

Fan cover screw

71 b

Metal terminal box

5

Drive end shield

30

Drive end bearing

84

Terminal block

6

Non drive end shield

39

Drive end seal

85

Set screw

7

Fan

50

Non drive end bearing

98

Connectors

13

Fan cover

54

NDE weatherproof seal

508

Terminal box plug

14

Tie rods

59

Preloading (wavy) washer

39

21

3

71b

508

71a

85

98

78

50

59

54

27

13

14

7

6

6

2

30

60

1

85

84

84

26

26

5

IM B3

IM B14

IM B5

5

5

39

39

28

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

LS/LSES MOTORS

10.2 - LS/LSES 160 M/L/LU, 180 MT/LR
motors

10.2.1 - Dismantling

- Remove the screws (27) and then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 levers diametrically
opposed to one another, using the shield (6) for support.

- Take out the key (21) and remove the seals (39 and 54 for foot
mounted motors) (54 for ange mounted motors).

- Remove the mounting screws (14).

- Unscrew the inner bearing retainer (33) xing screws (40)
when using a ange mounted motor or if the drive end bearing

is locked.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses. Recover the preloading washer
(59).

- Remove the circlip (38) if necessary (ange mounted motor).

- Remove the rotor (3) from the stator (1) taking care not to
touch the winding.

- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft extension with a washer.
Avoid knocking the running surfaces of the shaft.

10.2.2 - Reassembly

- See section 6.1 before reassembly.

- If necessary, insert the inner bearing retainer (33) at the rotor
drive end, then mount new bearings on the shaft, see section

6.3 mounting bearings.

- Mount the circlip (38) for ange mounted motors.

- Insert the rotor (3) in the stator (1) taking care not to knock the
winding.

- Position the preloading washer (59) with a small amount of
grease in the back of the bearing cage of the NDE shield (6),
then remount the NDE shield (6), positioning it on the stator.

- If there is a bearing retainer (33), screw a rod with the same
thread diameter as the screws (40) into one of the tapped holes
of the bearing retainer to maintain its angular position when
remounting the DE shield (5).

- Remount the shield (5) taking care to allow for the positioning
of a bearing retainer if used.

- Place the mounting screws (14) in position and tighten the
nuts diagonally up to the recommended torque (see section

6.1).

- If necessary, x the bearing retainer (33) with its own screws.

- Mount the shield seals with grease: (54 at the non drive end)
(39 at the drive end for foot mounted motors).

- Mount the fan (7) using a drift to bed it into position.

- Check that the rotor turns freely by hand (that there is no axial
play if there is a locked end shield).

- Replace the cover (13) and x it with the screws (27).

- Replace the key (21).

54

54 62

6 60 50 53 33 5 30 38 40 39

542

6 59

50

33

5 30 38 40 39

LS/LSES 160 M/L/LU - 180 MT/LR

standard bearings

NDE DE

LS/LSES 160 M/L/LU - 180 MT/LR

drive end roller bearings

NDE DE

29

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

LS/LSES MOTORS

LS/LSES 160 M/L/LU, 180 MT/LR

LS/LSES 160 M/L/LU, 180 MT/LR

Ref. Description Ref. Description Ref. Description

1

Wound stator

30

Drive end bearing

271

Drive end shield xing nut

2

Frame

33

Inner drive end bearing retainer

272

DE shield washer

3

Shaft

38

Snap ring for drive end shaft

273

Non drive end shield xing screw

4

Rotor

39

Drive end seal

274

NDE shield xing nut

5

Drive end shield

40

Drive end cover xing screw

308

Cover xing washer

6

Non drive end shield

41

Leaktight toothed lock washer for DE bearing
retainer

466

Snap ring for fan

7

Fan

50

Non drive end bearing

508

Terminal box plug

8

Fan key

54

NDE weatherproof seal

509

Cable gland seal

13

Fan cover

59

Preloading (wavy) washer

533

Cover shock mount

21

Drive end shield shaft extension key

70

Terminal box

629

Draining plug

26

Nameplate

74

Terminal box lid

27

Fan cover screw

270

Drive end shield xing screw

21

3

70

74

509

508

533

466

308

50

6

54

27

8

13

59

2

7

273

274

629

26

1

4

33

30

38

41

5

271

40

39

270

270

272

271

629

629

30

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

LS/LSES MOTORS

10.3 - LS/LSES 180 L/LUR, 200 L/LR/LU, 225
ST/MT/MR, 250 MZ motors

10.3.1 - Dismantling

- Remove the screws (27) and then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 levers diametrically
opposed to one another, using the shield (6) for support.

- Take out the key (21) and remove the seals (39 and 54 for foot
mounted motors) (54 for ange mounted motors).

- Remove the mounting screws (270 + 273).

- Unscrew the inner bearing retainer (33) xing screws (40) when
using a ange mounted motor or if the drive end bearing

is locked.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses. Recover the preloading washer (59).

- Remove the circlip (38) if appropriate.

- Remove the rotor (3) from the stator (1) taking care not to touch
the winding.

- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft extension with a washer. Avoid
knocking the running surfaces of the shaft.

10.3.2 - Reassembly

- See section 6.1 before reassembly.

- If necessary, insert the inner bearing retainer (33) at the rotor
drive end, then mount new bearings on the shaft, see section 6.3
mounting bearings.

- Fill with new grease: the correct amount of new grease for the
bearing is 50% of the free space.

- Mount the circlip (38) if necessary.

- Insert the rotor (3) in the stator (1) taking care not to knock the
winding.

- Position the preloading washer (59) with a small amount of
grease in the back of the bearing cage of the NDE shield (6), then
remount the NDE shield (6), positioning it on the stator.

- If there is a bearing retainer (33), screw a rod with the same
thread diameter as the screws (40) into one of the tapped holes of
the bearing retainer to maintain its angular position when
remounting the DE shield (5).

- Remount the shield (5) taking care to allow for the positioning of
a bearing retainer if used.

- Place the mounting screws (14) in position and tighten the nuts
diagonally up to the recommended torque (see section 6.1).

- If necessary, x the bearing retainer (33) with the screws (40).

- Mount the shield seals with grease: (54 at the non drive end)
(39 at the drive end for foot mounted motors).

- Mount the fan (7) using a drift to bed it into position.

- Check that the rotor turns freely by hand (that there is no axial
play if there is a locked end shield).

- Replace the cover (13) and x it with the screws (27).

- Replace the key (21).

54

54 62

6 60 50 53 33 5 30 38 40 39

542

6 59

50

33

5 30 38 40 39

LS/LSES 180 L/LUR - 200 L/LR/LU

225 ST/MT/MR - 250 MZ

standard bearings

NDE DE

LS/LSES 180 L/LUR - 200 L/LR/LU

225 ST/MT/MR - 250 MZ

drive end roller bearings

NDE DE

31

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

LS/LSES MOTORS

LS/LSES 180 L/LUR, 200 L/LR/LU, 225 ST/MT/MR, 250 MZ

LS/LSES 180 L/LUR, 200 L/LR/LU, 225 ST/MT/MR, 250 MZ

Ref. Description Ref. Description Ref. Description

1

Wound stator

29

Lifting ring xing washer

271

Drive end shield xing nut

2

Frame

30

Drive end bearing

272

DE shield washer

3

Shaft

33

Inner drive end bearing retainer

273

Non drive end shield xing screw

4

Rotor

38

Snap ring for drive end shaft

275

Fixing washer for NDE shield

5

Drive end shield

39

Drive end seal

319

Right foot

6

Non drive end shield

40

Drive end cover xing screw

320

Left foot

7

Fan

41

Leaktight toothed lock washer for DE bearing
retainer

321

Screws for feet

8

Fan key

42

Drive end grease nipples

322

Nut for feet

13

Fan cover

50

Non drive end bearing

323

Washer for feet

21

Drive end shield shaft extension key

54

NDE weatherproof seal

466

Snap ring for fan

25

Lifting ring

59

Preloading (wavy) washer

508

Terminal box plug

26

Nameplate

70

Terminal box

556

NDE bearing circlip

27

Fan cover screw

74

Terminal box lid

629

Draining plug

28

Lifting ring xing screw

270

Drive end shield xing screw

643

DE grease draining plug

21

42

3

70

1

74

29

25

28

508

466

50

59

6

54

27

8

7

13

2

273

275

320

321

323

322

319

556

26

4

33

30

38

41

5

272

40

39

270

629

643

270

271

32

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

LS/LSES MOTORS

10.4 - LS/LSES 225 MG, 250 ME/MF,
280 SC/MC, 280 SD/MD, 315 SN motors

10.4.1 - Dismantling

- Remove the screws (27), the grease nipple (42) and its extension,
then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 levers diametrically
opposed to one another, using the shield (6) for support.

- Take out the key (21).

- Remove the mounting screws (270 + 273).

- Unscrew the DE bearing retainer (33) xing screws (40) and NDE
bearing retainer (52) and (53) xing screws (62), and remove

them.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses. Recover the preloading washer (59).

- Remove circlips (38) and (60).

- Remove the rotor (3) from the stator (1), taking care not to touch
the winding with the inner bearing retainer.

- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft extension with a washer. Avoid
knocking the running surfaces of the shaft.

- The bearings are removed either separately or with the bearing
retainers; to avoid damaging the bearing retainers, heat the outer
bearing retainer to make it easier to dismantle (the bearing should
be discarded).

10.4.2 - Reassembly

- See section 6.1 before reassembly.

- Insert the inner bearing retainer (33) at the rotor drive end and the
inner bearing retainer (53) at the non drive end.

- Add new grease: the correct amount of new grease for the bearing
is 50% of the free space.

- Mount the new bearings on the shaft, see section 6.3 on mounting
bearings.

- Mount the circlips (38) and (60).

- Insert the rotor (3) in the stator (1) taking care not to knock the
winding.

- Screw a rod with the same thread diameter as the screws (40 and

62) into one of the tapped holes of the bearing retainers (33 and

53) to maintain their position and that of the grease nipple when
remounting the shields (5 and 6).

- Position the preloading washer (59) with a small amount of
grease in the back of the bearing cage of the NDE shield (6), then
remount the NDE shield (6), positioning it on the stator.

- Fit the seal (54), the outer bearing retainer (52) and the locking
screws (62) for the bearing retainers (52, 53).

- Mount the shield (5) taking care to allow for the positioning of the
bearing retainer.

- Place the mounting screws (14), tighten the nuts diagonally
without locking them so that the feet of the protective cover can be
positioned when it is mounted.

- At the drive end t the seal (39), insert the bearing retainer (32)

and the locking screws (40) for the bearing retainer.

- Mount the fan (7) using a drift to bed it in position or by heating the
hub of the aluminium fan to approximately 100°C.

- Check that the motor turns freely by hand and that there is no
axial play.

- Replace the cover (13), xing it with the screws (27).

- Replace the grease nipple (42) and extension.

- Tighten the rod nuts (14) diagonally up to the torque recommended
in section 6.1.

- Replace the key (21).

50

5333

5

6

416

54 62 63 60

65

50 52 33 30 38 41 40 39

542

LS/LSES 225 MG - 250 ME/MF

280 SC/MC/SD/MD - 315 SN

standard bearings

NDE

DE

LS/LSES 225 MG - 250 ME/MF

280 SC/MC/SD/MD - 315 SN

drive end roller bearings

NDE

DE

33

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

LS/LSES MOTORS

LS/LSES 225 MG, 250 ME/MF, 280 SC/MC, 280 SD/MD, 315 SN

LS/LSES 225 MG, 250 ME/MF, 280 SC/MC, 280 SD/MD, 315 SN

Ref. Description Ref. Description Ref. Description

1

Wound stator

38

Snap ring for drive end shaft

92

Terminal box baseplate

2

Frame

39

Drive end seal

270

Drive end shield xing screw

3

Shaft

40

Drive end cover xing screw

272

DE shield washer

4

Rotor

41

Leaktight toothed lock washer for DE bearing
retainer

273

Non drive end shield xing screw

5

Drive end shield

42

Drive end grease nipples

275

Fixing washer for NDE shield

6

Non drive end shield

50

Non drive end bearing

427

Cover plug

7

Fan

53

Inner non drive end bearing retainer

466

Snap ring for fan

8

Fan key

54

NDE weatherproof seal

468

Earth terminal plug

13

Fan cover

59

Preloading (wavy) washer

508

Terminal box plug

21

Drive end shield shaft extension key

62

Cover xing screw

533

Cover shock mount

26

Nameplate

63

Fixing washer for NDE bearing retainer

629

Draining plug

27

Fan cover screw

64

Non drive end grease nipple

643

DE grease draining plug

30

Drive end bearing

70

Terminal box

645

NDE grease draining plug

33

Inner drive end bearing retainer

74

Terminal box lid

40

41

39

40

41

1

2

26

5

38

30

33

42

21

3

4

92

70

74

53

50

59

6

8

7

64

54

27

13

270

643

629

270

272

272

508

427

533

468

629

466

645

275

273

63

62

34

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

LS/LSES MOTORS

10.5 - LS/LSES 280 SU/SK/MK,
315 (except SN) motors

10.5.1 - Dismantling

- Remove the screws (27), the grease nipple (42) and its
extension, then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 diametrically
opposed levers, using the shield (6) for support; for an
aluminium fan, heat the hub to approximately 100°C before
removing it.

- Take out the key (21).

- Unscrew the tie rods (14) then remove them.

- Unscrew the DE bearing retainer (33) xing screws (40) and
NDE bearing retainer (32) and (52) xing screws (62), and

remove the bearing retainers.

- Unscrew the «CHc» screws of the mobile valves (35 and 56)

then unscrew the valves using a hook spanner or a conical

bronze drift; unscrew the valves by hand and remove them.

The valves hold the seal (39 and 54).

- Remove the xed valves (34 and 35) from the bearing

housings.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses.

- Check that the bearing retainer (53) is smaller in diameter
than the stator, otherwise remove the bearing (50) as per the
following instructions.

- Remove the rotor (3) from the stator (1) at the drive end,
taking care not to touch the winding with the inner bearing
retainer if there is no internal turbine.

- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft extension with a washer.
Avoid knocking the running surfaces of the shaft.

- The bearings are removed either separately or with the
bearing retainers (33 and 53); to avoid damaging the bearing
retainers, heat the outer bearing ring (the bearing should be
discarded).

- Recover the preloading washer or springs (59) from the
bearing retainer (53).

10.5.2 - Reassembly

- See section 6.1 before reassembly.

- Insert the inner bearing retainer (33) at the rotor drive end and
the inner bearing retainer (53) at the non drive end, not
forgetting to insert the preloading springs (59).

- Add new grease: the correct amount of new grease for the
bearing is 50% of the free space.

- Mount the new bearings (30 and 50) on the shaft, see section

6.3 on mounting bearings.

- Insert the rotor (3) in the stator (1) taking care not to knock the
winding.

- Screw a rod with the same thread diameter as the screws (40)
and (62) into one of the tapped holes of the bearing retainers
(33) and (53) to maintain the position of the grease nipple when
remounting the shields (5 and 6).

- Check that the preloading springs are properly installed.

- Fit the NDE shield (6), positioning it on the stator, then mount

the xed valve (55) in the shield bearing housing.

- Mount the mobile valve (56) by either screwing it or locking it,
having carefully installed the seal (54) on the valve.

- Mount the outer bearing retainer (52) with the bearing retainer
locking screws (62), making sure that the grease drain hole is
at the bottom.

- Mount the shield (5) at the drive end, positioning it on the

stator, then mount the xed valve (34) in the shield bearing

housing.

- Mount the mobile valve (35) by either screwing it or locking it,
having carefully installed the seal (39) on the valve.

- Mount the outer bearing retainer (32) with the bearing retainer
locking screws (40), making sure that the grease drain hole is
at the bottom.

- Put the tie rods (14) in place, not forgetting the feet of the
protective cover (380), tighten the nuts diagonally without
locking them so that the feet of the protective cover can be
positioned when it is mounted.

- Mount the fan (7) using a drift to bed it in position or by heating
the hub of the aluminium fan to approximately 100°C.

- Check that the motor turns freely by hand and that there is no
axial play.

- Replace the protective cover (13) and x it with the screws

(27), replace the grease nipple (42) and its extension.

- Tighten the rod nuts (14), always diagonally, up to the torque
recommended in section 6.1.

- Replace the key (21).

52 32

3956

6 59

53

33

5

54

50

30

34

35

62 40

55

3255

6

53 33 5

3954

50

30 35

40

52

62

3456

LS/LSES 280 SU/SK/MK - 315

standard bearings

LS/LSES 280 SU/SK/MK - 315

drive end roller bearings

NDE DE

NDE DE

35

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

LS/LSES MOTORS

LS/LSES 280 SU/SK/MK, 315 (except SN)

LS/LSES 280 SU/SK/MK, 315 (except SN)

Ref. Description Ref. Description Ref. Description

1

Wound stator

30

Drive end bearing

53

Inner non drive end bearing retainer

2

Frame

32

Outer drive end bearing retainer

54

NDE weatherproof seal

3

Rotor

33

Inner drive end bearing retainer

55

Non drive end xed grease valve

5

Drive end shield

34

Drive end xed grease valve

56

Non drive end mobile grease valve

6

Non drive end shield

35

Drive end mobile grease valve

59

Preloading washer or spring

7

Fan

39

Drive end seal

62

Cover xing screw

13

Fan cover

40

Drive end cover xing screw

70

Terminal box

14

Tie rods

42

Grease nipples

74

Terminal box lid

21

Shaft extension key

50

Non drive end bearing

81

Cable gland support plate

27

Fan cover screw

52

Outer non drive end bearing retainer

380

Protective cover feet

5

39

32

35

34

30

21

33

3

2

59

55

62

1

53

42

54

52

14

7

13

27

42

40

6

380

50

56

70

81

74

36

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

FLS/FLSES MOTORS

11 - FLS/FLSES MOTORS

11.1 - FLS/FLSES 80 to 132 motors

11.1.1 - Dismantling

- Remove the screws (27) and then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 levers (for example,
2 screwdrivers) diametrically opposed to one another, using the
shield (6) for support.

- Remove the tie rods (14).

- Remove the key (21).

- Using a wooden mallet, tap the shaft on the fan side in order to
loosen the drive end shield (5).

- Remove the rotor shaft (3) and the DE shield (5) taking care not
to knock the winding.

- Remove the shield on the fan side (6).

- Recover the preloading (wavy) washer (59) and the NDE shield
seal (54).

- Remove the circlip (60) from anged motors using angled circlip

pliers.

- Separate the DE shield from the rotor shaft.

- The shaft can then be seen with its 2 bearings and, if appropriate,
the circlip.
Use a bearing remover to take out the bearings, taking care not to
knock the running surfaces of the shaft.

11.1.2 - Reassembling motors without circlip

- Mount the bearings on the rotor shaft.

- Insert the rotor into the stator taking all possible precautions not
to knock the winding.

- Mount the DE shield (5).

- Place the preloading washer (59) in the bearing housing, then
mount the NDE shield (6).

- Place the tie rods (14) in position and tighten the nuts diagonally
up to the recommended torque (see section 6.4).

- Mount the shield seals (39, 54, 308) with grease.

- Mount the fan (7) using a drift to bed it into position.

- Check that the motor turns freely by hand and that there is no
radial play.

- Replace the cover (13) and x it with the screws (27).

11.1.3 - Reassembling motors with ange and
circlip

- Mount the DE bearing (30) in the ange (5) using the external

slip-ring for support.

- Fit the circlip (60).

- Mount this assembly on the rotor (3) using the inner slip-ring for
support.

- Mount the NDE bearing on the rotor.

- Insert the rotor (3) and shield (5) assembly in the stator taking
care not to knock the winding.

- Place the preloading washer (59) in the bearing housing, then
mount the NDE shield (6).

- Place the tie rods (14) in position and tighten the nuts diagonally
up to the recommended torque (see section 6.4).

- Mount the shield seals (39, 54, 308) with grease.

- Mount the fan (7) using a drift to bed it into position.

- Check that the motor turns freely by hand and that there is no
axial play.

- Replace the cover (13) and x it with the screws (27).

- Replace the key (21).

56 59

54 50 30830

56 59

50 3054 39

60

FLS/FLSES 80 to 132

foot mounted

FLS/FLSES 80 to 132

flange mounted (or foot/flange)

NDE DE

NDE DE

37

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

FLS/FLSES MOTORS

FLS/FLSES 80 to 132

FLS/FLSES 80 to 132

Ref. Description Ref. Description Ref. Description

1

Wound stator

21

Shaft extension key

60

Circlip

2

Frame

26

Nameplate

71

FLSES terminal box

3

Rotor

27

Fan cover screw

84

Terminal block

5

Drive end shield

30

Drive end bearing

85

Set screw

6

Non drive end shield

39

Drive end seal

98

Connectors

7

Fan

50

Non drive end bearing

308

Labyrinth seal

13

Fan cover

54

NDE weatherproof seal

508

Terminal box plug

14

Tie rods

59

Preloading (wavy) washer

308

IM B3

IM B14

IM B5

39

21

71

508

85

98

84

3

59

54

27

13

5

5

5

30

60

1

26

26

84

85

98

2

6

7

14

50

39

38

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

FLS/FLSES MOTORS

11.2 - FLS/FLSES 160, 180 MR motors

11.2.1 - Dismantling

- Remove the screws (27) and then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 levers diametrically
opposed to one another, using the shield (6) for support.

- Take out the key (21) and remove the seals (39 and 54 for foot
mounted motors) (54 for ange mounted motors).

- Remove the mounting screws (270 + 273).

- Unscrew the inner bearing retainer (33) xing screws (40)
when using a ange mounted motor or if the drive end bearing

is locked.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses. Recover the preloading washer
(59).

- Remove the circlip (38) if necessary (ange mounted motor).

- Remove the rotor (3) from the stator (1) taking care not to
touch the winding.

- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft extension with a washer.
Avoid knocking the running surfaces of the shaft.

11.2.2 - Reassembly

- See section 6.1 before reassembly.

- If necessary, insert the inner bearing retainer (33) at the rotor
drive end, then mount new bearings on the shaft, see section

6.3 mounting bearings.

- Mount the circlip (38) for ange mounted motors.

- Insert the rotor (3) in the stator (1) taking care not to knock the
winding.

- Position the preloading washer (59) with a small amount of
grease in the back of the bearing cage of the NDE shield (6),
then remount the NDE shield (6), positioning it on the stator.

- If there is a bearing retainer (33), screw a rod with the same
thread diameter as the screws (40) into one of the tapped holes
of the bearing retainer to maintain its angular position when
remounting the DE shield (5).

- Remount the shield (5) taking care to allow for the positioning
of a bearing retainer if used.

- Place the mounting screws (14) in position and tighten the
nuts diagonally up to the recommended torque (see section

6.1).

- If necessary, x the bearing retainer (33) with its own screws.

- Mount the shield seals with grease: (54 at the non drive end)
(39 at the drive end for foot mounted motors).

- Mount the fan (7) using a drift to bed it into position.

- Check that the rotor turns freely by hand (that there is no axial
play if there is a locked end shield).

- Replace the cover (13) and x it with the screws (27).

- Replace the key (21).

54

54 62

6 60 50 53 33 5 30 38 40 39

542

6 59

50

33

5 30 38 40 39

FLS/FLSES 160 - 180 MR

standard bearings

NDE DE

FLS/FLSES 160 - 180 MR

drive end roller bearings

NDE DE

39

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

FLS/FLSES MOTORS

FLS/FLSES 160, 180 MR

FLS/FLSES 160, 180 MR

Ref. Description Ref. Description Ref. Description

1

Wound stator

27

Fan cover screw

74

Terminal box lid

2

Frame

30

Drive end bearing

81

Cable gland support plate

3

Shaft

33

Inner drive end bearing retainer

270

Drive end shield xing screw

4

Rotor

38

Snap ring for drive end shaft

271

Drive end shield xing nut

5

Drive end shield

39

Drive end seal

272

DE shield washer

6

Non drive end shield

40

Drive end cover xing screw

273

Non drive end shield xing screw

7

Fan

41

Leaktight toothed lock washer for DE bearing
retainer

308

Cover xing washer

8

Fan key

50

Non drive end bearing

466

Snap ring for fan

13

Fan cover

54

NDE weatherproof seal

533

Cover shock mount

21

Drive end shield shaft extension key

59

Preloading (wavy) washer

629

Draining plug

26

Nameplate

70

Terminal box

21

3

70

74

81

50

6

54

8

273

533

466

308

27

13

7

59

629

270

270

629

26

2

1

4

33

30

38

41

40

39

5

272

271

629

40

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

FLS/FLSES MOTORS

11.3 - FLS/FLSES 180 M/L/LUR, 200 LU,
225 MR/SR motors

11.3.1 - Dismantling

- Remove the screws (27) and then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 levers diametrically
opposed to one another, using the shield (6) for support.

- Take out the key (21) and remove the seals (39 and 54 for foot
mounted motors) (54 for ange mounted motors).

- Remove the mounting screws (270 + 273).

- Unscrew the inner bearing retainer (33) xing screws (40)
when using a ange mounted motor or if the drive end bearing

is locked.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses. Recover the preloading washer
(59).

- Remove the circlip (38) if necessary (ange mounted motor).

- Remove the rotor (3) from the stator (1) taking care not to
touch the winding.

- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft extension with a washer.
Avoid knocking the running surfaces of the shaft.

11.3.2 - Reassembly

- See section 6.1 before reassembly.

- If necessary, insert the inner bearing retainer (33) at the rotor
drive end, then mount new bearings on the shaft, see section

6.3 mounting bearings.

- Mount the circlip (38) for ange mounted motors.

- Insert the rotor (3) in the stator (1) taking care not to knock the
winding.

- Position the preloading washer (59) with a small amount of
grease in the back of the bearing cage of the NDE shield (6),
then remount the NDE shield (6), positioning it on the stator.

- If there is a bearing retainer (33), screw a rod with the same
thread diameter as the screws (40) into one of the tapped holes
of the bearing retainer to maintain its angular position when
remounting the DE shield (5).

- Remount the shield (5) taking care to allow for the positioning
of a bearing retainer if used.

- Place the mounting screws (14) in position and tighten the
nuts diagonally up to the recommended torque (see section

6.1).

- If necessary, x the bearing retainer (33) with its own screws.

- Mount the shield seals with grease: (54 at the non drive end)
(39 at the drive end for foot mounted motors).

- Mount the fan (7) using a drift to bed it into position.

- Check that the rotor turns freely by hand (that there is no axial
play if there is a locked end shield).

- Replace the cover (13) and x it with the screws (27).

- Replace the key (21).

54

54 62

6 60 50 53 33 5 30 38 40 39

542

6 59

50

33

5 30 38 40 39

FLS/FLSES 180 M/L/LUR - 200 LU

225 MR/SR

standard bearings

NDE DE

FLS/FLSES 180 M/L/LUR - 200 LU

225 MR/SR

drive end roller bearings

NDE DE

41

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

FLS/FLSES MOTORS

FLS/FLSES 180 M/L/LUR, 200 LU, 225 MR/SR

FLS/FLSES 180 M/L/LUR, 200 LU, 225 MR/SR

Ref. Description Ref. Description Ref. Description

1

Wound stator

30

Drive end bearing

81

Cable gland support plate

2

Frame

33

Inner drive end bearing retainer

270

Drive end shield xing screw

3

Shaft

38

Snap ring for drive end shaft

271

Drive end shield xing nut

4

Rotor

39

Drive end seal

272

DE shield washer

5

Drive end shield

40

Drive end cover xing screw

273

Non drive end shield xing screw

6

Non drive end shield

41

Leaktight toothed lock washer for DE bearing
retainer

275

Fixing washer for NDE shield

7

Fan

42

Drive end grease nipples

466

Snap ring for fan

8

Fan key

50

Non drive end bearing

556

NDE bearing circlip

13

Fan cover

54

NDE weatherproof seal

629

Draining plug

21

Drive end shield shaft extension key

59

Preloading (wavy) washer

643

DE grease draining plug

26

Nameplate

70

Terminal box

27

Fan cover screw

74

Terminal box lid

8

6

59

50

81

2

26

27

13

74

70

1

4

3

21

42

40

41

39

5

271

270

38

30

33

54

7

466

556

629

275

273

272

643

629

270

42

Installation and maintenance - Three-phase induction motors

4850 en - 2018.11 / f

FLS/FLSES MOTORS

11.4 - FLS/FLSES 225 M to 280 motors

11.4.1 - Dismantling the NDE shield

- Remove the xing screws (27) and then take off the cover

(13).

- Remove the shaft extension screw if necessary.

- Take out the fan (7).

- Remove the xing screws from the inner NDE bearing retainer

(53).

- Remove the xing screws (273) from the NDE shield (6).

- Remove the fan key if appropriate.

- Using two levers or a exible hammer, disengage the NDE

shield (6) taking care not to place it aslant. Remove the shield
by sliding it along the shaft.

- Put the dismantled components to one side and recover the
preloading washer (59), which should be replaced in its
housing.

11.4.2 - Dismantling the DE shield

- Dismantle the DE shield without removing the rotor (3). To do
this:

- Remove the xing screws (270) from the DE shield (5).

- Remove the xing screws (40) from the DE internal cover

(33).

- Take out the key (21).

- Using two levers or a exible hammer, disengage the DE

shield (5) taking care not to place it aslant.

- Remove the shield by sliding it along the shaft.

11.4.3 - Changing the antifriction bearings

- Using an appropriate lifting tool, take out the rotor without
knocking the winding.

- Take off the DE circlip (38).

- Remove the bearings (30) and (50) with an appropriate tool,
protecting the end of the shaft extension. Avoid knocking the
running surfaces of the shaft.

- Change the bearings in accordance with the instructions

described in the General information in section 6 (shrinktting

only).

IMPORTANT : Before undertaking any of these procedures,
read the «CHECKS BEFORE REASSEMBLY» section.

11.4.4 - Reassembly

- Mount the DE bearing (30) on the rotor shaft (take care not to
forget the inner bearing retainer (33) and the circlip (38)!), and
also the NDE bearing (50) if and only if the stator inner Ø allows
the inner NDE bearing retainer (53) to pass through.

- Insert the rotor into the stator taking care not to knock the
winding. Install the NDE bearing if this has not already been
done.

- Fill the decompression grooves (416) located in the shaftway
with grease.

- Present the shields, grease nipples facing upwards. Begin
with the DE shield (5). Fix a dowel pin in one of the inner bearing
retainer (33) tapped holes so that the grease inlet pipes fully

correspond.

- End with the NDE shield (6). Fix a dowel pin in one of the
inner bearing retainer (53) tapped holes so that the grease

inlet pipes fully correspond.

- Lift the rotor slightly and t the shields in place.

From now on, we recommend checking at every step that
the rotor turns freely by hand before continuing to the next
instruction.

- Replace the shield xing screws (270) and (273).

- Insert the xing screws on the inner bearing retainers (33) and

(53). Replace the AZ washers to ensure a perfect seal.

- Replace the fan key if appropriate.

- Replace the fan (7).

- Replace the shaft extension screw if necessary.

- Replace the cover (13) and reinsert the xing screws (27).

- Lubricate the DE and NDE antifriction bearings, turning the
shaft by hand.

Amount of grease for ball bearings:

- Frame size 225 - 250: DE and NDE = 120 cm

3

- Frame size 280: DE = 170 cm3 / NDE = 120 cm

3

50

5333

5

6

416

50

5333

5

6

416

FLS/FLSES 225 M to 280

standard bearings

NDE

DE

FLS/FLSES 225 M to 280

drive end roller bearings

NDE

DE

43

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

FLS/FLSES MOTORS

FLS/FLSES 225 M to 280

FLS/FLSES 225 M to 280

Ref. Description Ref. Description Ref. Description

1

Wound stator

26

Nameplate

69

Terminal box base seal

2

Frame

27

Fan cover screw

70

Terminal box

3

Rotor

30

Drive end bearing

74

Terminal box lid

5

Drive end shield

33

Inner drive end bearing retainer

75

Terminal box lid xing screw

6

Non drive end shield

38

Snap ring for drive end shaft

77

Terminal box lid seal

7

Fan

40

Drive end cover xing screw

81

Cable gland support plate

10

Turbine or fan screw

42

Drive end grease nipples

270

Drive end shield xing screw

11

Lockwasher

50

Non drive end bearing

271

Drive end shield xing nut

12

Lock washer

53

Inner non drive end bearing retainer

273

Non drive end shield xing screw

13

Fan cover

59

Preloading (wavy) washer

406

Drive end grease valve cover plate (plug)

21

Drive end shield shaft extension key

64

Non drive end grease nipple

456

Non drive end grease valve cover plate (plug)

40

5

42

38

30

33

21

3

26

81

74

75

77

70

69

64

27

406

270

271

1

2

53

50

456

59

273

6

7

12

13

5

10

11

44

Installation and maintenance - Three-phase induction motors

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FLS/FLSES MOTORS

11.5 - FLS/FLSES 315 to 355 LD motors

11.5.1 - Dismantling the NDE shield

- Remove the xing screws (27) and then take off the cover

(13).

- Remove the shaft extension screw if necessary.

- Take out the fan (7).

- Remove the xing screws from the inner NDE bearing retainer

(53).

- Remove the xing screws (273) from the NDE shield (6).

- Remove the fan key if appropriate.

- Using two levers or a exible hammer, disengage the NDE

shield (6) taking care not to place it aslant. Remove the shield
by sliding it along the shaft.

- Put the dismantled components to one side and retrieve the
preloading springs (256), which should be replaced in their
housing.

11.5.2 - Dismantling the DE shield

- Dismantle the DE shield without removing the rotor (3). To do
this:

- Remove the xing screws (270) from the DE shield (5).

- Remove the xing screws (40) from the DE internal cover

(33).

- Take out the key (21).

- Using two levers or a exible hammer, disengage the DE

shield (5) taking care not to place it aslant.

- Remove the shield by sliding it along the shaft.

11.5.3 - Changing the antifriction bearings

- Using an appropriate lifting tool, take out the rotor without
knocking the winding.

- Remove the DE (38) and NDE (60) circlips.

- Remove the bearings (30) and (50) with an appropriate tool,
protecting the end of the shaft extension. Do not knock the
running surfaces of the shaft.

- Change the bearings in accordance with the instructions

described in the General information in section 6 (shrinktting

only).
IMPORTANT : Before undertaking any of these procedures,
read the «CHECKS BEFORE REASSEMBLY» section.

11.5.4 - Reassembly

- Mount the DE bearing (30) on the rotor shaft (take care not to
forget the inner bearing retainer (33) and the circlip (38)!), and
also the NDE bearing (50) if and only if the stator inner Ø allows
the inner NDE bearing retainer (53) to pass through, ret the

circlip (60), ret the preloading springs in their housing in the

inner NDE bearing retainer (53).

- Insert the rotor into the stator taking care not to knock the
winding. Install the NDE bearing if this has not already been
done.

- Fill the decompression grooves (416) located in the shaftway
and the grease inlet pipes with grease.

- Present the shields, grease nipples facing upwards. Begin
with the DE shield (5). Fix a dowel pin in one of the inner bearing
retainer (33) tapped holes so that the grease inlet pipes fully

correspond.

- End with the NDE shield (6). Fix a dowel pin in one of the inner
bearing retainer (53) tapped holes so that the grease inlet

pipes fully correspond.

- Lift the rotor slightly and t the shields in place.

From now on, we recommend checking at every step that
the rotor turns freely by hand before continuing to the next
instruction.

- Replace the shield xing screws (270) and (273).

- Insert the xing screws on the inner bearing retainers (33) and

(53). Replace the AZ washers to ensure a perfect seal.

- Replace the fan key if appropriate.

- Replace the fan (7).

- Replace the shaft extension screw if necessary.

- Replace the cover (13) and reinsert the xing screws (27).

- Lubricate the DE and NDE antifriction bearings, turning the
shaft by hand.

Amount of grease for ball bearings:

- Frame size 315 : DE and NDE = 50 g for 4P and + / 35 g for 2P

- Frame size 355 : DE and NDE = 60 g for 4P and + / 35 g for 2P

50

5333

5

6

416

50

5333

5

6

416

FLS/FLSES 315 to 355 LD

standard bearings

NDE

DE

FLS/FLSES 315 to 355 LD

drive end roller bearings

NDE

DE

45

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

FLS/FLSES MOTORS

FLS/FLSES 315 to 355 LD

FLS/FLSES 315 to 355 LD

Ref. Description Ref. Description Ref. Description

1

Wound stator

27

Fan cover screw

70

Stator terminal box

2

Frame

30

Drive end bearing

74

Stator terminal box lid

3

Shaft

33

Inner drive end bearing retainer

81

Cable gland support plate

4

Rotor

38

Snap ring for drive end shaft

256

Preloading spring

5

Drive end shield

40

Drive end cover xing screw

270

Drive end shield xing screw

6

Non drive end shield

41

Leaktight toothed lock washer for DE bearing
retainer

272

DE shield washer

7

Fan

42

Drive end grease nipples

273

Non drive end shield xing screw

10

Turbine or fan screw

50

Non drive end bearing

275

Fixing washer for NDE shield

11

Lockwasher

53

Inner non drive end bearing retainer

406

Drive end grease valve cover plate

12

Lock washer

60

Circlip

456

Non drive end grease valve cover plate

13

Fan cover

62

Cover xing screw

468

Earth terminal plug

21

Drive end shield shaft extension key

63

Fixing washer for NDE bearing retainer

629

Draining plug

25

Lifting ring

64

Non drive end grease nipple

26

Nameplate

65

Extension for non drive end grease nipple

256

468

406

629

456

70

40

1

2

4

3

5

42

81

74

26

6

272

270

41

38

30

270

272

406

629

629

33

21

42

275

273

25

25

53

50

60

63

62

7

27

13

65

12

11

10

64

46

Installation and maintenance - Three-phase induction motors

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PLS/PLSES MOTORS

12 - PLS/PLSES MOTORS

12.1 - PLS/PLSES 180 LG/LGU
200 M/L/LP/LU/LR, 225 MR motors

12.1.1 - Dismantling

- Remove the screws (27) and grease nipple (64), then take off
the cover (13).

- Pull out the fan (7) using a hub remover or 2 diametrically
opposed levers, using the shield (6) for support, then remove
the fan key or pin.

- Take out the key (21).

- Unscrew the tie rods (14) then remove them.

- Unscrew the DE bearing retainer (33) xing screws (40) and
NDE bearing retainer (53) xing screws (62), and remove

them.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses. Recover the preloading washer
(59).

- Remove the circlip (38) and if necessary the circlip (60) (motor
with roller bearing).

- Remove the rotor (3) from the stator (1) at the drive end,
taking care not to touch the winding with the inner bearing
retainer. Take out the bearings (30) and (50) using a bearing
remover, while protecting the end of the shaft extension with a
washer. Take care not to knock the running surfaces of the
shaft.

- The bearings are removed either separately or with the
bearing retainers; to avoid damaging the bearing retainers,
heat the inner bearing retainer to make it easier to dismantle
(the bearing should be discarded).

12.1.2 - Reassembly

- See section 6.1 before reassembly.

- Insert the inner bearing retainer (33) at the rotor drive end and
the inner bearing retainer (53) at the non drive end.

- Fit the new bearings on the shaft, see section 6.1 on mounting
bearings.

- Insert the rotor (3) in the stator (1) taking every precaution not
to knock the winding.

- Screw a rod with the same thread diameter as the screws (40)
and (62) into one of the tapped holes of the bearing retainers
(33) and (53) to maintain the position of the grease nipple when

retting the shields (5 and 6).

- Position the preloading washer (59) with a small amount of
grease at the back of the bearing cage of the NDE shield (6),
then remount the NDE shield (6) by positioning it on the stator.

- Fit the shield (5) taking care to position the bearing retainer
(33) correctly.

- Place the tie rods (14) in position and tighten the nuts
diagonally up to the recommended torque (see section 6.1).

- Fix the bearing retainers (33) and (53) with their own screws
(40) and (62).

- Mount the shield seals with grease: (54) for the non drive end,
(39) for the drive end.

- Install the fan key or pin.

- Mount the fan (7) using a drift to bed it into position.
MAKE SURE it is facing the right way!

- Check that the rotor turns freely by hand (that there is no axial
play if there is a locked end shield).

- Replace the cover (13) and x it with the screws (27).

- Replace the grease nipple (64).

- Fill with new grease: the quantity is indicated in the table
opposite.
Turn the shaft by hand during greasing.

- Replace the key (21).

PLS/PLSES 180 LG/LGU

200 M/L/LP/LU/LR

standard bearings

NDEDE

59 53 533

40

6

62

54 50 30 38 39

PLS/PLSES 225 MR

standard bearings

NDEDE

59 53 533

40

6

62

54 50 30 38 39

PLS/PLSES 180 LG/LGU

200 M/L/LP/LU/LR - 225 MR

drive end roller bearings

NDEDE

53 533

40

6

62

54 5060 30 38 39

Bearing g

6212 Z 31

6214 60
6312 or NU312 90
6313 or NU313 93
6314 or NU314 140

(Weight valid for POLYREX EM103 grease with immaculately
clean grease track + bearing seat + drain holes).

47

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

PLS/PLSES MOTORS

PLS/PLSES 180 LG/LGU, 200 M/L/LP/LU/LR, 225 MR

PLS/PLSES 180 LG/LGU, 200 M/L/LP/LU/LR, 225 MR

Ref. Description Ref. Description Ref. Description

1

Wound stator

21

Key

54

Non drive end seal

2

Frame

27

Fan cover screw

59

Preloading (wavy) washer

3

Rotor

30

Drive end bearing

64

Grease nipple

5

Drive end shield

33

Inner drive end bearing retainer

70

Terminal box

6

Non drive end shield

39

Drive end seal

74

Terminal box lid

7

Fan

42

Grease nipple

84

Terminal block

13

Fan cover

50

Non drive end bearing

110

Protective grille

14

Tie rods

53

Inner non drive end bearing retainer

13

50

64 1 70

74 84

5 142

110

42

39

59

53

6

7

54

3

27

30

21

33

48

Installation and maintenance - Three-phase induction motors

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PLS/PLSES MOTORS

12.2 - PLS/PLSES 225 MG, 250,
280 SC/SD/MC/MD motors

12.2.1 - Dismantling

- Remove the screws (27), the grease nipple (64) and its
extension (65), then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 diametrically
opposed levers, using the shield (6) for support, then remove
the fan key.

- Take out the key (21).

- Unscrew the tie rods (14) then remove them.

- Unscrew the DE bearing retainer (33) and (32) xing screws
(40) and NDE bearing retainer (52) and (53) xing screws (62),

and remove them.

- Unscrew the «Hc» screw of the mobile valve (35) then
unscrew the valve using a hook key or a conical bronze drift;

unscrew the valve by hand and remove it. The valve holds the
seal (39) and its support (386) in place.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses. Recover the preloading washer
(59).

- Remove the circlip (60).

- Remove the rotor (3) from the stator (1) at the drive end,
taking care not to touch the winding with the inner bearing
retainer.

- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft end with a washer. Take
care not to knock the running surfaces of the shaft.

- The bearings are removed either separately or with the
bearing retainers; to avoid damaging the bearing retainers,
heat the inner bearing retainer to make it easier to dismantle
(the bearing should be discarded).

12.2.2 - Reassembly

- See section 6.1 before reassembly.

- Insert the inner bearing retainer (33) at the rotor drive end and
the inner bearing retainer (53) at the non drive end.

- Fit the new bearings on the shaft, see section 6.1 on mounting
bearings.

- Mount the circlip (60).

- Insert the rotor (3) in the stator (1) taking every precaution not
to knock the winding.

- Screw a rod with the same thread diameter as the screws (40)
and (62) into one of the tapped holes of the bearing retainers
(33) and (53) to maintain the position of the grease nipple when

retting the shields (5 and 6).

- Position the preloading washer (59) with a small amount of
grease at the back of the bearing cage of the NDE shield (6),
then remount the NDE shield (6) by positioning it on the stator.

- At the non drive end t the seal (54) and its support (388),

insert the bearing retainer (52) and the locking screws (62) for
the bearing retainers (52) and (53).

- At the drive end t the shield (5) taking care to position the

bearing retainer (33) correctly.

- Mount the mobile valve (35) by either screwing it or locking it
having carefully mounted the seal (39) and its support (386).

- Mount the shield seals with grease: (54) for the non drive end,
(39) for the drive end.

- Mount the outer bearing retainer (32) with the bearing retainer
locking screws (40), making sure that the grease drain hole is
at the bottom.

- Put the tie rods (14) in place, not forgetting the feet of the
protective cover (380), tighten the nuts diagonally without
locking them so that the feet of the protective cover can be
positioned when it is mounted.

- Install the fan key.

- Mount the fan (7) using a drift to bed it in position or by heating
the hub of the aluminium fan to approximately 100°C.
MAKE SURE it is facing the right way!

- Check that the motor turns freely by hand and that there is no
axial play.

- Replace the protective cover (13) and x it with the screws

(27), replace the grease nipple (64) and its extension (65).

- Tighten the rod nuts (14), always diagonally, up to the torque
recommended in section 6.1.

- Fill with new grease: the quantity is indicated in the table
below.
Turn the shaft by hand during greasing.

- Replace the key (21).

PLS/PLSES 225 MG - 250

280 SC/SD/MC/MD

standard bearings

NDEDE

PLS/PLSES 225 MG - 250

280 SC/SD/MC/MD

drive end roller bearings

NDEDE

59 533

40

39

35

386

32

52

6

62

54

388

60

50 53 30

533

40

39

35

386

32

52

6

62

54

388

60

50 53 30

Bearing g

6314 105

6315 140
6317 or NU317 180
6318 or NU318 220

(Weight valid for POLYREX EM103 grease with immaculately
clean grease track + bearing seat + drain holes).

49

Installation and maintenance - Three-phase induction motors
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PLS/PLSES MOTORS

PLS/PLSES 225 MG, 250, 280 SC/SD/MC/MD

PLS/PLSES 225 MG, 250, 280 SC/SD/MC/MD

Ref. Description Ref. Description Ref. Description

1

Wound stator

32

Outer drive end bearing retainer

65

Extension for grease nipple

2

Frame

33

Inner drive end bearing retainer

70

Terminal box

3

Rotor

35

Drive end mobile grease valve

74

Terminal box lid

5

Drive end shield

39

Drive end seal

84

Terminal block

6

Non drive end shield

42

Grease nipple

118

Internal deector

7

Fan

50

Non drive end bearing

380

Protective cover feet

13

Fan cover

52

Outer non drive end bearing retainer

386

Drive end seal support

14

Tie rods

53

Inner non drive end bearing retainer

388

Non drive end seal support

21

Key

54

Non drive end seal

411

External deector

27

Fan cover screw

59

Preloading (wavy) washer

30

Drive end bearing

64

Grease nipple

7

13

53

6

65

64

118

2 1

7470 84 42 5 33

30

32

387

39

386

50

59

411

52

54

388

14

380

27

3

21

36

35

50

Installation and maintenance - Three-phase induction motors

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PLS/PLSES MOTORS

12.3 - PLS/PLSES 280 MG, 315 motors

12.3.1 - Dismantling

- Remove the screws (27), the grease nipple (64) and its
extension (65), then take off the cover (13).

- Pull out the fan (7) using a hub remover or 2 diametrically
opposed levers, using the shield (6) for support; for an
aluminium fan, heat the hub to approximately 100°C before
removing it.

- Take out the key (21).

- Unscrew the mounting screws (14) then remove them.

- Unscrew the DE bearing retainer (32) and (33) xing screws
(40) and NDE bearing retainer (52) and (53) xing screws (62),

and remove them.

- Unscrew the «Hc» screws of the mobile valves (35 and 56)

then unscrew the valves using a pin spanner; unscrew the
valves by hand and remove them.
The valves hold the supports (386) and (388) for the seals (39
and 54) in place.

- Using a bronze drift, remove the shields (5 and 6) by tapping

gently on the shield bosses.

- Check that the bearing retainer (53) is smaller in diameter
than the stator, otherwise remove the bearing (50) as per the
following instructions.

- Remove the rotor (3) from the stator (1) at the drive end,
taking care not to touch the winding with the inner bearing
retainer if there is no internal turbine. Take out the bearings
(30) and (50) using a bearing remover, while protecting the end
of the shaft end with a washer. Take care not to knock the
running surfaces of the shaft.

- The bearings are removed either separately or with the
bearing retainers (33 and 53); to avoid damaging the bearing
retainers, heat the inner bearing ring (the bearing should be
discarded).

- Recover the preloading washer or springs (59) from the
bearing retainer (53).

12.3.2 - Reassembly

- See section 6.1 before reassembly.

- Insert the inner bearing retainer (33) at the rotor drive end and
the inner bearing retainer (53) at the non drive end, not
forgetting to insert the preloading springs (59) with a little
grease.

- Fit the new bearings (30 and 50) on the shaft, see section 6.1
on mounting bearings.

- Insert the rotor (3) in the stator (1) taking every precaution not
to knock the winding.

- Screw a rod with the same thread diameter as the screws (40)
and (62) into one of the tapped holes of the bearing retainers
(33) and (53) to maintain the position of the grease nipple when

retting the shields (5 and 6).

- Check that the preloading springs are properly installed.

- Mount the NDE shield (6) by positioning it on the stator.

- Mount the mobile valve (56) by either screwing it or locking it,
having carefully installed the seal (54) with its support (388).

- Mount the outer bearing retainer (52) with the bearing retainer
locking screws (62), making sure that the grease drain hole is
at the bottom.

- Mount the DE shield (5) by positioning it on the stator.

- Mount the mobile valve (35) by either screwing it or locking it,
having carefully installed the seal (39) with its support (386).

- Mount the shield seals with grease: (54) for the non drive end,
(39) for the drive end.

- Mount the outer bearing retainer (32) with the bearing retainer
locking screws (40), making sure that the grease drain hole is
at the bottom.

- Put the tie rods (14) and the feet of the protective cover (380)
in place, tighten the nuts diagonally without locking them so
that the feet of the protective cover can be positioned when it
is mounted.

- Install the fan key.

- Mount the fan (7) using a drift to bed it in position or by heating
the hub of the aluminium fan to approximately 100°C.
MAKE SURE it is facing the right way!

- Check that the motor turns freely by hand and that there is no
axial play.

- Replace the protective cover (13) and x it with the screws

(27), replace the grease nipple (64) and its extension (65).

- Fill with new grease: the quantity is indicated in the table
below. Turn the shaft by hand during greasing.

- Tighten the nuts (14), always diagonally, up to the torque
recommended in section 6.1.

- Replace the key (21).

PLS/PLSES 280 MG - 315

standard bearings

NDEDE

PLS/PLSES 280 MG - 315

drive end roller bearings

NDEDE

59 533

40

39

35

386

32

62

6

52

54

388

56

50 53 30

533

40

39

35

386

32

62

6

52

54

388

56

50 53 30

Bearing g

6316 160

6320 385

NU320 385

6219 215

6224 244

(Weight valid for POLYREX EM103 grease with immaculately
clean grease track + bearing seat + drain holes).

51

Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f

PLS/PLSES MOTORS

PLS/PLSES 280 MG, 315

PLS/PLSES 280 MG, 315

Ref. Description Ref. Description Ref. Description

1

Wound stator

32

Outer drive end bearing retainer

64

Grease nipple

2

Frame

33

Inner drive end bearing retainer

65

Extension for grease nipple

3

Rotor

35

Drive end mobile grease valve

70

Terminal box

5

Drive end shield

39

Drive end seal

74

Terminal box lid

6

Non drive end shield

42

Grease nipple

84

Terminal block

7

Fan

50

Non drive end bearing

118

Internal deector

13

Fan cover

52

Outer non drive end bearing retainer

380

Protective cover feet

14

Tie rods

53

Inner non drive end bearing retainer

386

Drive end seal support

21

Key

54

Non drive end seal

388

Non drive end seal support

27

Fan cover screw

56

Non drive end mobile grease valve

390

Non drive end inner bearing retainer strut

30

Drive end bearing

59

Preloading (wavy) washer

411

External deector

56

59

13 64

65

6

118

74

70 5 4212

33

30

386

35

39

7

411

390

53

52

388

54

50

14

3

21

32

380

27

Moteurs Leroy-Somer

Headquarter: Boulevard Marcellin Leroy - CS 10015

16915 ANGOULÊME Cedex 9

Limited company with capital of 65,800,512 €

RCS Angoulême 338 567 258

www.leroy-somer.com