Instruction book

High speed separator

MAB 104B-14/24

Product No. 881241-08-17/1

Book No. 9027982-02 Rev. 2
Published By:
Alfa Laval Tumba AB
SE-147 80 Tumba, Sweden
Telephone: +46 8 530 650 00
Telefax: +46 8 530 310 40
The original instructions are in English
© Alfa Laval Tumba AB 27 November 2017
This publication or any part there of may not be
reproduced or transmitted by any process or
means without prior written permission of
Alfa Laval Tumba AB.
Contents
1 Read this first 7

2 Safety instructions 9

2.1 Warning signs in text 14

2.2 Recycling Information 15
2.3 Requirements of personnel 16
2.4 Remote start 16

3 Separator basics 17

3.1 Basic principles of separation 18

3.2 Overview 22
3.3 Separating function 23
3.4 Mechanical function 30
3.5 Definitions 34

4 Operating instructions 35

4.1 Operating routine 36

4.2 Cleaning the bowl 45

5 Service instructions 49

5.1 Periodic maintenance 51

5.2 Maintenance Logs 54
5.3 MS - Check points 59
5.4 Cleaning 74
5.5 When changing oil 78
5.6 Common maintenance directions 79
5.7 Lifting instructions 85

6 Dismantling/Assembly 87

6.1 General 88
6.2 Dismantling 89

3
 6.3 Assembly 100
6.4 Feed and discharge pumps 110
6.5 Frame feet 120

7 Trouble-tracing 121

7.1 Trouble tracing procedure 123

7.2 Mechanical function 123
7.3 Purification faults 129
7.4 Clarification faults 131

8 Technical reference 133

8.1 Product description 135

8.2 Technical data 138
8.3 Basic size drawing, separator without pump 141
8.4 Basic size drawing, separator with pump and no
heater 142
8.5 Basic size drawing, separator with pump and
heater 143
8.6 Connection list, 
(with pump and no heater / without pump) 144
8.7 Connection list,
(pump and heater) 145
8.8 Interface description 146
8.9 Lubricants 149
8.10 Drawings 159
8.11 Electric motor 168
8.12 Storage and installation 169

4
Read and understand instruction manuals
and observe the warnings before installation,
operation, service and maintenance.

Not following the instructions can result in

serious accidents.

In order to make the information clear only foreseeable conditions

have been considered. No warnings are given, therefore, for
situations arising from the unintended usage of the machine and its
tools.

5
6
1 Read this first

This manual is designed for operators and service

engineers working with the Alfa Laval separator
MAB 104B-14/24.
For information concerning the function of the
separator, see ‘‘3 Separator basics” on page 17
and ‘‘4 Operating instructions” on page 35.
If the separator has been delivered and installed
by Alfa Laval as part of a processing system, this
manual is a part of the System Manual. In this
case, study carefully all the instructions in the

S0068011
System Manual.
In addition to this Instruction book a Spare Parts
Catalogue, SPC is supplied.
This Instruction book consists of:

Safety instructions
Pay special attention to the safety instructions for
the separator. Not following the safety instructions
can cause accidents resulting in damage to
equipment and serious injury to personnel.

Separator basics
Read this chapter if you are not familiar with this
type of separator.

Operating instructions
This chapter contains operating instructions for
the separator only.

7
 1 Read this first

Service instructions
This chapter gives instructions for daily checks,
cleaning, oil changes, servicing and check points.

Dismantling / Assembly
This chapter contains step-by-step instructions for
dismantling and assembly of the separator for
service and repair.

Trouble-tracing
Refer to this chapter if the separator functions
abnormally.
If the separator has been installed as part of a
processing system always refer to the Trouble-
tracing part of the System Manual first.

Technical reference
This chapter contains technical data concerning
the separator and drawings.

Installation
General information on installation planning.
Lifting instruction.

8
2 Safety instructions

The centrifuge includes parts that rotate at high

speed. This means that:
 Kinetic energy is high
 Great forces are generated

G0010421
 Stopping time is long

Manufacturing tolerances are extremely fine.

Rotating parts are carefully balanced to reduce
undesired vibrations that can cause a breakdown.
Material properties have been considered
carefully during design to withstand stress and
fatigue.
The separator is designed and supplied for a
specific separation duty (type of liquid, rotational
speed, temperature, density etc.) and must not be
used for any other purpose.
Incorrect operation and maintenance can result in
unbalance due to build-up of sediment, reduction
of material strength, etc., that subsequently could
lead to serious damage and/or injury.
The following basic safety instructions therefore
apply:
 Use the separator only for the purpose
and parameter range specified by
Alfa Laval.
 Strictly follow the instructions for
installation, operation and maintenance.
 Ensure that personnel are competent and
have sufficient knowledge of maintenance
and operation, especially concerning
emergency stopping procedures.
S0151211

 Use only Alfa Laval genuine spare parts

and the special tools supplied.

9
 2 Safety instructions

Disintegration hazards

 When power cables are connected,

always check direction of motor rotation.
If incorrect, vital rotating parts could
unscrew.

S01512F1
 If excessive vibration occurs, stop
separator and keep bowl filled with
liquid during rundown.

S01512N1
 Use the separator only for the purpose
3
m /h
and parameter range specified by kPa
3
kg/m o
C
Alfa Laval.
 Hz
r/min

S01512P1
 Check that the gear ratio is correct for
power frequency used. If incorrect,
subsequent overspeed may result in a 50Hz
serious break down. 60Hz

 Welding or heating of parts that rotate S01512L1

can seriously affect material strength.

S0151241

 Wear on the large lock ring thread must

not exceed safety limit. -mark on lock A
ring must not pass opposite -mark by
more than specified distance.
S01512G1

(MA
X2
5)

 Inspect regularly for corrosion and

erosion damage. Inspect frequently if
process liquid is corrosive or erosive.
S01512H1

10
2 Safety instructions

Entrapment hazards

 Do NOT stand on the separator or parts

of.

Entrapment hazards

 Make sure that rotating parts have come 

to a complete standstill before starting
any dismantling work.


S01512O1
If there is no braking function the run
down time can exceed two hours.


 To avoid accidental start, switch off and

lock power supply before starting any
dismantling work.


S0151261
Assemble the machine completely
before start. All covers and guards must
be in place.

Electrical hazard

 Follow local regulations for electrical

installation and earthing (grounding).
 To avoid accidental start, switch off and
S0151271

lock power supply before starting any

dismantling work.

11
 2 Safety instructions

Crush hazards

 Use correct lifting tools and follow lifting

instructions.



S01512M1


Do not work under a hanging load.

S01512Y1
Noise hazards

 Use ear protection in noisy

environments.

S0151291
Burn hazards

 Lubrication oil, machine parts and

various machine surfaces can be hot and
cause burns. Wear protective gloves.
S01512A1

12
2 Safety instructions

Skin irritation hazards

 When using chemical cleaning agents,

make sure you follow the general rules
and suppliers recommendation
regarding ventilation, personnel

S01512D1
protection etc.
 Use of lubricants in various situations.

Cut hazards

 Sharp edges, especially on bowl discs

and threads can cause cuts.
Wear protective gloves.

S01512B1
Flying objects

 Risk for accidental release of snap rings

and springs when dismantling and
assembly. Wear safety goggles.

S01512C1

Health hazard

 Risk for unhealthy dust when handling

friction blocks/pads. Use a dust mask to
make sure not to inhale any dust.
S01512V1

13
 2 Safety instructions

2.1 Warning signs in text

Pay attention to the safety instructions in this
manual. Below are definitions of the three grades
of warning signs used in the text where there is a
risk for injury to personnel.

DANGER

Type of hazard

DANGER indicates an imminently

hazardous situation which, if not avoided,
will result in death or serious injury.

WARNING

Type of hazard

WARNING indicates a potentially

hazardous situation which, if not avoided,
could result in death or serious injury.

CAUTION

Type of hazard

CAUTION indicates a potentially

hazardous situation which, if not avoided,
may result in minor or moderate injury.

NOTE
NOTE indicates a potentially hazardous
situation which, if not avoided, may result
in property damage.

14
2 Safety instructions

2.2 Recycling Information

Unpacking
Packing material consists of wood, plastics,
cardboard boxes and in some cases metal straps.
 Wood and cardboard boxes can be reused,
recycled or used for energy recovery.
 Plastics should be recycled or burnt at a
licensed waste incineration plant.
 Metal straps should be sent for material
recycling.

Maintenance
During maintenance oil and wear parts in the
machine are replaced.
 Oil must be taken care of in agreement with
local regulations.
 Rubber and plastics should be burnt at a
licensed waste incineration plant. If not
available they should be disposed to a
suitable licensed land fill site.
 Bearings and other metal parts should be
sent to a licensed handler for material
recycling.
 Seal rings and friction linings should be
disposed to a licensed land fill site. Check
your local regulations.
 Worn out or defected electronic parts should
be sent to a licensed handler for material
recycling.
Scrapping
At the end of use, the equipment must be
recycled according to relevant local regulations.
Besides the equipment itself, any hazardous
residues from the process liquid must be taken
into consideration and dealt with in a proper
manner. When in doubt, or in the absence of local
regulations, please contact your local Alfa Laval
sales company.

15
 2 Safety instructions

2.3 Requirements of
personnel
Only skilled or instructed persons are allowed to
operate the machine, e.g. operating and
maintenance staff.
 Skilled person: A person with technical
knowledge or sufficient experience to enable
him or her to perceive risks and to avoid
hazards which electricity/mechanics can
create.
 Instructed person: A person adequately
advised or supervised by a skilled person to
enable him or her to perceive risks and to
avoid hazards which electricity/mechanics
can create.
In some cases special skilled personnel may
need to be hired, like electricians and others. In
some of these cases the personnel has to be
certified according to local regulations with
experience of similar types of work.

2.4 Remote start

If the separator is operated from a remote
position, from where it can neither be seen nor
heard, the power isolation device shall be
equipped with an interlocking device. This is to
prevent a remote start command which could
result in some liquid being fed to the separator
when it is shut down for service.
The first start after the separator has been taken
apart or has been standing still for a long time
shall always be locally manually supervised.

16
3 Separator basics

Contents

3.1 Basic principles of separation 18

3.1.1 Factors influencing the separation 
result 19

3.2 Overview 22

3.3 Separating function 23

3.3.1 Purification 24
3.3.2 Purifier bowl 25
3.3.3 Liquid seal 26
3.3.4 Position of interface - gravity disc 26
3.3.5 Clarification 28

3.4 Mechanical function 30

3.4.1 Main parts 30
3.4.2 Inlet and outlet 31
3.4.3 Mechanical power transmission 32
3.4.4 Brake 32
3.4.5 Sensors and indicators 33

3.5 Definitions 34

17
3.1 Basic principles of separation 3 Separator basics

3.1 Basic principles of

separation
The purpose of separation can be:
 to free a liquid of solid particles,
 to separate two mutually insoluble liquids with
different densities while removing any solids
presents at the same time,
 to separate and concentrate solid particles
from a liquid.

G0010711
Sedimentation by gravity

Separation by gravity
A liquid mixture in a stationary bowl will clear
slowly as the heavy particles in the liquid mixture
sink to the bottom under the influence of gravity.
A lighter liquid rises while a heavier liquid and
solids sink.
Continuous separation and sedimentation can be
achieved in a settling tank having outlets
arranged according to the difference in density of
the liquids.

G0010811
Heavier particles in the liquid mixture will settle
and form a sediment layer on the tank bottom.
Sedimentation in a settling tank, with outlets making it
possible to separate the lighter liquid parts from the
heavier

Centrifugal separation
In a rapidly rotating bowl, the force of gravity is
replaced by centrifugal force, which can be
thousands of times greater.
Separation and sedimentation is continuous and
happens very quickly.
The centrifugal force in the separator bowl can
achieve in a few seconds what takes many hours
in a tank under influence of gravity.
G0010911

The centrifugal solution

18
3 Separator basics 3.1 Basic principles of separation

3.1.1 Factors influencing the

separation result

Separating temperature
For some types of process liquids (e.g. mineral
oils) a high separating temperature will normally
increase the separation capacity. The
temperature influences oil viscosity and density
and should be kept constant throughout the
separation.

G0011021
High viscosity (with low temperature)

Viscosity
Low viscosity facilitates separation. Viscosity can
be reduced by heating.

G0011121
Low viscosity (with high temperature)

Density difference (specific gravity ratio)

The greater the density difference between the
two liquids, the easier the separation. The density
difference can be increased by heating.
G0011221

High density (with low temperature)

G0011321

Low density (with high temperature)

19
3.1 Basic principles of separation 3 Separator basics

Phase proportions
An increased quantity of water in an oil will
influence the separating result through the
optimum transporting capacity of the disc stack.
An increased water content in the oil can be
compensated by reducing the throughput in order
to restore the optimum separating efficiency.

Size and shape of particles

The round and smooth particle (A) is more easily
separated out than the irregular one (B).
m³/h
Rough treatment, for instance in pumps, may A
cause a splitting of the particles resulting in
slower separation. Larger particles (1) are more
easily separated than smaller ones (2) even if B
they have the same density.

The throughput
The throughput sets the time allowed for the
separation of water and sediment from the oil. A
better separation result can often be achieved by
reducing the throughput, i.e. by increasing the
settling time. μm

G0613311
2 1
Influence of size and shape

Sludge space - sludge content

Sediment will accumulate on the inside periphery
of the bowl. When the sludge space is filled up
the flow inside the bowl is influenced by the
sediment and thereby reducing the separating
efficiency. In such cases the time between
cleaning should be reduced to suit these
conditions.
G0601211

Sludge accumulation

20
3 Separator basics 3.1 Basic principles of separation

Disc stack
A neglected disc stack containing deformed discs
or discs coated with deposits will impair the
separating result.

Gravity disc
The position of the interface is adjusted by
altering the outlet diameter of the heavy liquid
phase, that is by exchanging the gravity disc.

S0068611
A gravity disc with a larger hole will move the
interface towards the bowl periphery, whereas a Gravity disc diameter adjust the interface position
disc with a smaller hole will place it closer to the
bowl centre. For selection of gravity disc see
‘‘3.3.4 Position of interface - gravity disc” on page
26.

21
3.2 Overview 3 Separator basics

3.2 Overview
The separator comprises a processing part and a
driving part. It is driven by an electric motor.
Mechanically, the separator machine frame is
composed of a bottom part and a collecting cover.
The motor is flanged to the frame. The frame feet
have vibration damping.
The bottom part of the separator contains the
horizontal driving device, driving shaft with
coupling, a worm gear and a vertical spindle.
The bottom part also contains an oil bath for the
worm gear, a brake and a revolution counter,
indicating speed.
The collecting cover contains the processing
parts of the separator, the inlet and outlets and
piping.
The liquid is cleaned in the separator bowl. This is
fitted on the upper part of the vertical spindle and
rotates at high speed inside the space formed by
the collecting cover.
All connections have standardised numbers.
These numbers are used in the connection list
and the basic size drawing which can be found in
chapter ‘‘8 Technical reference” on page 133.

22
3 Separator basics 3.3 Separating function

3.3 Separating function

Unseparated process liquid is fed into the bowl
through the inlet pipe and is pumped via the
distributor towards the periphery of the bowl.
When the process liquid reaches holes of the
distributor, it will rise through the channels formed
by the disc stack where it is evenly distributed.
The process liquid is continuously cleaned as it
flows towards the center of the bowl. When the
cleaned process liquid leaves the disc stack it
rises upwards and leaves the bowl through outlet
(220). Separated heavy phase flows over the

G0613211
gravity disc and leaves the bowl via outlet (221).
The sludge and solid particles are forced out
towards the periphery of the bowl and collected
on the bowl wall, the sludge space.
The space between bowl hood and top disc is
normally filled with heavy phase.

23
3.3 Separating function 3 Separator basics

3.3.1 Purification

D2
D1

G0503731
D3

Centrifugal force Bowl parts

Process liquid D1 D1 Diameter of inner outlet.

Heavy liquid phase D2 D2 Hole diameter of gravity disc.

Light liquid phase D3 D3 Diameter of interface.

Sediment (solids)

24
3 Separator basics 3.3 Separating function

This bowl has two liquid outlets. The process

liquid flows through the centre and out under the
distributor.
The liquid flows up and is divided among the
interspaces between the bowl discs, where the
liquid phases are separated from each other by
action of the centrifugal force.
The heavy phase and any sediment move along
the underside of the bowl discs towards the
periphery of the bowl, where the sediment settles
on the bowl wall. The heavy phase proceeds
along the upper side of the top disc towards the
neck of the bowl hood and leaves the bowl via the
gravity disc - the outer way (dark coloured in
illustration).
The light phase moves along the upper side of the
bowl discs towards the bowl centre and leaves the
bowl via the hole in the top disc neck - the inner
way (light coloured in illustration).

3.3.2 Purifier bowl

The figure shows the characteristic parts of a
purifier bowl:
1. Top disc with neck.
2. The gravity disc, which should be chosen
according to directions in chapter ‘‘4.1.2
Selection of gravity disc” on page 37.

G0589011

Purifier bowl

25
3.3 Separating function 3 Separator basics

3.3.3 Liquid seal

In a purifier bowl the liquid seal prevents the light
liquid phase from passing the outer edge of the
top disc, thus eliminating flow out through the
outer path. The bowl must therefore be filled with
sealing liquid before the process liquid is
admitted. The sealing liquid will be displaced
slightly by the process liquid into a position that
forms the interface. The location of the interface
will be affected by the relative difference in
density between the phases, but is also
dependent on outer and inner diameters (D1 and
D2 respectively).
The sealing liquid:
 must be insoluble in the light phase.
 must not have higher density than the heavy
phase.
 can be soluble in the heavy phase.
In most cases the heavy phase is used as sealing

G0612011
liquid.
In some cases and only if the process liquid
contains a sufficient quantity of heavy phase
(more than 25%), the process liquid can be
supplied directly as the seal will form
automatically.

3.3.4 Position of interface -

gravity disc
The position of the interface is adjusted for
optimum separation by altering the pressure
balance of the two liquid phases oil and water
inside the separator.
The purifier bowl is adjusted for separation liquid
mixtures with various specific gravity ratios by
altering the diameter of the outlet for the heavy
phase (D2). The heavier or more viscous the light
phase and the larger the liquid feed the smaller
the diameter should be. For this purpose a
number of gravity discs with various hole
diameters is delivered with the separator.
G0600711

Exchange of gravity disc

26
3 Separator basics 3.3 Separating function

The gravity disc is located inside the bowl hood. A

gravity disc with a larger hole will move the
interface towards the bowl periphery, whereas a
disc with a smaller hole will place it closer to the
bowl centre.
In a purifier bowl the position of the interface
should be located between the disc stack edge
and the outer edge of the top disc.
When selecting a gravity disc for a purifier the
general rule is to use the disc having the largest
possible hole without causing a break of the water
seal.
Where to locate the interface depends on which
phase should be delivered pure, and on the
proportions between the amounts of the two
phases as well.
 If the light phase is wanted more free from the
heavy one, the interface should be placed
nearer the bowl periphery, however not more
than the outer edge of the top disc (the gravity
disc is too big), as this would break the liquid
seal.
 The heavier or more viscous the light phase
and the larger the liquid feed the smaller the
diameter should be.
 When the heavy phase (water) is wanted
more free from the light one (oil), the interface
should be placed nearer the bowl centre,

S0068611
however not inside the outer edge of the discs
(the gravity disc is too small), as this would
prevent the liquid flow. Gravity disc

27
3.3 Separating function 3 Separator basics

3.3.5 Clarification

G0503711
Centrifugal force This bowl has one liquid outlet.
The process liquid flows through the centre of the
distributor.
The liquid flows up and is divided among the
Process liquid
interspaces between the bowl discs, where the
sediment is separated from the liquid by action of
the centrifugal force.
The sediment move along the underside of the bowl
Bowl parts discs towards the periphery of the bowl, where it
settle on the bowl wall.
The separation is influenced by changes in the
viscosity (separating temperature) or in the through-
Sediment (solids) put.

28
3 Separator basics 3.3 Separating function

Clarifier bowl
The illustration shows characteristic parts of the
clarifier bowl:
1. Discharge collar
2. Bowl disc without caulks (metal strips)

G0589121
Clarifier bowl

29
3.4 Mechanical function 3 Separator basics

3.4 Mechanical function

3.4.1 Main parts

1. Separator bowl.
2. Vertical driving device.
3. Horizontal driving device.
4. Double pump.

G0685821
Separator with double pump

30
3 Separator basics 3.4 Mechanical function

3.4.2 Inlet and outlet

The inlet and outlets consist of the following parts:
 The inlet to pump (201.1).
 The outlet from pump to heater (201.2).
 The inlet from heater to separator (201.3).
 The inlet for water seal (206).
 The outlet for clean oil (220).
 The outlet for water (221).
 Drain of frame (460).

G0625721
Separator with in- and outlet pump

 The inlet (201).

 The inlet for water seal (206).
 The outlet for clean oil (220).
 The outlet for water (221).
 Drain of frame (460).
See drawings and connection lists on pages 141
to 144.
G0625821

Separator without pump

31
3.4 Mechanical function 3 Separator basics

3.4.3 Mechanical power

transmission
The main parts of the power transmission
between motor and bowl are illustrated in the
figure.
The friction coupling ensures a gentle start and
acceleration and at the same time prevents
overloading of the worm gear and motor.
The worm gear has a ratio which increase the
bowl speed several times compared with the
motor speed. For correct ratio see chapter ‘‘8.2
Technical data” on page 138.
To reduce bearing wear and the transmission of
bowl vibrations to the frame and foundation, the
top bearing of the bowl spindle is mounted in a
spring casing.
The worm wheel runs in a lubricating oil bath. The
bearings on the spindle and the worm wheel shaft
are lubricated by the oil splash produced by the
rotating worm wheel.

G0246431
1. Bowl spindle
2. Top bearing and spring casing
3. Worm wheel
4. Worm
5. Friction coupling
6. Worm wheel shaft

3.4.4 Brake
The separator is equipped with a hand operated
brake to be used when stopping the separator.
The use of the brake reduces the retardation time
of the bowl and critical speeds will therefore be
quickly passed.
The brake lining acts on the outside of the bowl
G0607421

body.

Applying (A) and releasing (B) of brake

32
3 Separator basics 3.4 Mechanical function

3.4.5 Sensors and indicators

Revolution counter
A revolution counter indicates the speed of the
separator and is driven from the worm wheel
shaft. The correct speed is needed to achieve the
best separating results and for reasons of safety.
The number of revolutions on the revolution
counter for correct speed is shown in chapter ‘‘8
Technical reference” on page 133. Refer to name
plate for speed particulars.

G0246231
Revolution counter - speed indicator

Sight glass
The sight glass shows the oil level in the worm
gear housing.

G0602711
Sight glass - oil level

33
3.5 Definitions 3 Separator basics

3.5 Definitions
Back pressure Pressure in the separator outlet.
Clarification Liquid/solids separation with the intention of separating particles, normally
solids, from a liquid having a lower density than the particles.
Clarifier disc An optional disc, which replaces the gravity disc in the separator bowl, in the
case of clarifier operation. The disc seals off the heavy phase (water) outlet in
the bowl, thus no liquid seal exists.
Density Mass per volume unit. Expressed in kg/m3 at specified temperature, normally at
15 °C.
Gravity disc Disc in the bowl hood for positioning the interface between the disc stack and
the outer edge of the top disc. This disc is only used in purifier mode.
Interface Boundary layer between the heavy phase (outer) and the light phase (inner) in
a separator bowl.
Liquid seal Liquid in the solids space of the separator bowl to prevent the light phase from
leaving the bowl through the heavy phase outlet, in purifier mode.
Major Service (MS) Overhaul of the complete separator, including bottom part. Renewal of seals in
bowl, gaskets in inlet/outlet, seals and bearings in bottom part.
Purification Liquid/liquid/solids separation with the intention of separating two intermixed
and mutually insoluble liquid phases of different densities. Solids having a
higher density than the liquids can be removed at the same time. The lighter
liquid phase (oil), which is the major part of the mixture, shall be purified as far
as possible.
Sediment (sludge) Solids separated from a liquid.
Throughput The feed of process liquid to the separator per time unit. Expressed in m3/h or
lit/h.
Viscosity Fluid resistance against movement. Normally expressed in centistoke
(cSt = mm 2/sec), at specified temperature

34
4 Operating instructions

Contents

4.1 Operating routine 36

4.1.1 Before first start 36 The operating procedure:
4.1.2 Selection of gravity disc 37
4.1.3 Before normal start 38
4.1.4 Starting and running-up procedure 40 Before start
4.1.5 At full speed 42
4.1.6 During operation 42
4.1.7 Stopping procedure 43
4.1.8 Emergency stop 44

4.2 Cleaning the bowl 45 Start and run-up

4.2.1 Removal of separated sludge 45
4.2.2 Disc stack 46
4.2.3 Assembly the bowl 46

Running

Stop procedure

35
4.1 Operating routine 4 Operating instructions

4.1 Operating routine

These instructions are related only to the
separator itself.

NOTE
If there is a system manual, always follow the
operating instructions of the system manual.
If there is no system manual the instructions
below are to be followed

4.1.1 Before first start

Technical demands for connections and logical

G0685811
limitations for the separator is described in the
chapter ‘‘8 Technical reference” on page 133 and
the documents: Separator with double pump

a. Technical data
b. Basic size drawing
c. Connection list
d. Interface description
e. Foundation drawing
Before first start the following checkpoint must be
checked:
 Motors equipped with regreasing nipples:
When starting the motor for the first time, or
after long storage of the motor, apply the
specified quantity of grease until new grease
is forced out of the grease outlet.
 Ensure the machine is installed correctly and
that feed-lines and drains have been flushed
clean.
 Fill oil in the gear housing. Fill up to the
middle of the sightglass. Use the correct
grade of oil. The separator is delivered
without oil in the worm gear housing. For
grade and quality, see ‘‘8.9 Lubricants” on
page 149.

36
4 Operating instructions 4.1 Operating routine

4.1.2 Selection of gravity disc

The separator is delivered with a set of gravity
discs. The diameter (d) of the gravity disc (2) sets
the position of the interface in the separator. The
separation efficiency can be optimized by
selection of the correct diameter for each
process. See ‘‘8.2.1 Selection of gravity disc with
the nomograph” on page 139

G0589011
Separator bowl with top disc and gravity disc

37
4.1 Operating routine 4 Operating instructions

4.1.3 Before normal start

Check these points before every start.
1. Ensure the bowl is clean and that the
separator is properly assembled.

G0599311
Check separator is assembled
2. Make sure that all inlet and outlet couplings
and connections have been correctly made
and are properly tightened to prevent
leakage.





S0009821

 Check pipe connections

3. Check that the hooks and screws for the

collecting cover are fully tightened.

G0600211

Hook bolts for collecting cover

4. Read the oil level. The middle of the sight

glass indicates the minimum level. Refill if
necessary. For grade and quality, see ‘‘8.9
Lubricants” on page 149.
G0602711

Check oil level

38
4 Operating instructions 4.1 Operating routine

5. Release the brake.

G0607421
Release the brake by moving it from pos. A to B

6. Make sure the direction of rotation of the

motor and bowl corresponds to the sign on
the frame.

S0068811

39
4.1 Operating routine 4 Operating instructions

4.1.4 Starting and running-up

procedure
1. After starting the separator, visually check to
be sure that the motor and separator have
started to rotate.
2. Check the direction of rotation. The revolution
counter should run counter-clockwise.

G0246231
Direction of rotation
3. Be alert for unusual noises or conditions.
Smoke and odour may occur at the start
when friction pads are new.

G0600011
Smoke and odour
4. Note the normal occurrence of critical speed
vibration periods.

S0055621

Vibration

40
4 Operating instructions 4.1 Operating routine

5. Motor current indicates when the separator

has come to full speed.

S0009621
Current increases when the coupling engages...

6. During start the current reaches a peak and

then slowly drops to a low and stable value.
For normal length of the start-up period see
‘‘8.2 Technical data” on page 138.

S0009631
WARNING
.... to decrease to a stable value when full speed has
Disintegration hazards
been reached.

When excessive vibration occurs, stop

separator and keep bowl filled with liquid
during rundown.
The cause of the vibrations must be
identified and corrected before the separator
is restarted.
Excessive vibrations may be due to incorrect
assembly or poor cleaning of the bowl.

41
4.1 Operating routine 4 Operating instructions

4.1.5 At full speed

1. If running the separator as a purifier, supply
liquid (water) to form the liquid seal. Continue
until liquid (water) flows out through the heavy
phase (water) outlet. The liquid (water)
should have the same temperature as the
process liquid and be supplied quickly.
2. Close the liquid (water) feed.
3. Start the oil feed slowly to avoid breaking the
water seal. Then fill the bowl as quickly as
possible.
4. Adjust to desired throughput.

4.1.6 During operation

Do regular checks on:
 feed inlet temperature (if applicable)
 collecting tank level
 sound/vibration of the separator
 motor current.

42
4 Operating instructions 4.1 Operating routine

4.1.7 Stopping procedure

1. If running the separator as a purifier, feed
sealing water.
2. Turn off the feed.
3. Stop the separator.
4. Pull the brake (A).
Wait until the separator has come to a
complete standstill (2-5 minutes).
Release the brake (B) when the separator is
at standstill.

G0607421
Pull the brake from position B to A
5. Manual cleaning should be carried out before
next start up. See ‘‘4.2.1 Removal of
separated sludge’’.

WARNING

Entrapment hazards

S0051121
Make sure that rotating parts have come to a
complete standstill before starting any
dismantling work.
The revolution counter and the motor fan
indicate if the separator is rotating or not.

43
4.1 Operating routine 4 Operating instructions

4.1.8 Emergency stop

The emergency stop is always installed according
to local safety regulations. It is often a button
placed on the wall near the separator or on the
control equipment.
If the separator begins to vibrate excessively
during operation, stop it immediately by switching
off the separator motor, e.g. by pushing the
emergency stop button.

S0009911
WARNING Emergency stop

Disintegration hazards

Evacuate the area around the separator. The

separator may be hazardous when passing
its critical speeds during the run-down.

NOTE
After an emergency stop the cause of the
fault must be identified.
If all parts have been checked and the cause
remains unclear, contact Alfa Laval for
advice.

44
4 Operating instructions 4.2 Cleaning the bowl

4.2 Cleaning the bowl

The separated sludge is accumulating on the
inside surface of the separator bowl. How often
the separator needs to be cleaned, depends on
the amount of sediment entering the separator. 
High solids content or high throughput has the
consequence that the cleaning needs to be done
more often.
Intervals for a specific case must be based on
experience.

G0601211
Information about sludge content in the feed can
be achieved either by using a lab centrifuge or to
run the separator for 2 - 3 hours and then stop Sludge accumulation
and open the bowl to check the amount of sludge.
Then prolong or shorten the cleaning interval.

4.2.1 Removal of separated

sludge
Remove the sludge collected on the inside of the
bowl as follows:
1. Stop the separator as described in ‘‘4.1.7
Stopping procedure” on page 43.

WARNING

Entrapment hazards

S0051111
Make sure that rotating parts have come to a
complete standstill before starting any
dismantling work.
The revolution counter and the motor fan
indicate if the separator is rotating or not.

2. Dismantle the bowl as described in ‘‘6.2.1

Bowl” on page 90.

45
4.2 Cleaning the bowl 4 Operating instructions

4.2.2 Disc stack

When the sediment is not sticky, the disc stack
can be cleaned by “hurling”.
1. Clean the other bowl parts.
2. Assemble the bowl.
3. Close and lock the collecting cover.
4. Run up to full speed without liquid feed.
5. After “hurling” either continue separation or

G0601211
stop and open the bowl and remove the
sediment.
Bowl cleaning by “hurling”
If the sediment adheres firmly, dissolve it by
submerging the distributor and the disc stack in a
suitable detergent.
If “hurling” has no effect, clean the discs one by
one.

4.2.3 Assembly the bowl

Each bowl constitutes a balanced unit. Exchange
of any major part may need rebalancing of the
bowl. To prevent mixing of parts, e.g. in an
installation comprising of several machines of the
same type, the major bowl parts carry the
machine manufacturing number or its last three
digits.

NOTE
Be sure bowl parts are not interchanged.
Out of balance vibration will reduce ball
bearing life.

The assembly procedure is described in

‘‘6.3.3 Bowl” on page 107.

46
4 Operating instructions 4.2 Cleaning the bowl

Purifier and clarifier bowl

G0612381

G0612391
Purifier bowl Clarifier bowl

The arrows indicate position of guides in the bowl.

Lubrication needed
Molykote 1000
S0000411

The assembly procedure is described in

‘‘6.3.3 Bowl” on page 107.

47
4.2 Cleaning the bowl 4 Operating instructions

48
5 Service instructions

Contents

5.1 Periodic maintenance 51

5.1.1 Introduction 51
5.1.2 Maintenance intervals 51
5.1.3 Maintenance procedure 53
5.1.4 Service kits 53

5.2 Maintenance Logs 54

5.2.1 Daily checks 54
5.2.2 Oil change 55
5.2.3 IS - Intermediate Service 56
5.2.4 MS-Major Service 57

5.3 MS - Check points 59

5.3.1 Corrosion 59
5.3.2 Erosion 61
5.3.3 Cracks 62
5.3.4 Disc stack pressure 63
5.3.5 Lock ring; wear and damage 64
5.3.6 Radial wobble of bowl spindle 65
5.3.7 Height position of bowl / bowl spindle66
5.3.8 Bowl spindle cone and bowl body 
nave 67
5.3.9 Coupling disc of motor 68
5.3.10 Friction pads 69
5.3.11 Brake 70
5.3.12 Top bearing springs 71
5.3.13 Ball bearing housing 71
5.3.14 Worm wheel and worm; wear of teeth72

5.4 Cleaning 74
5.4.1 External cleaning 74
5.4.2 Cleaning agents 75
5.4.3 Cleaning of bowl discs 77

49
 5 Service instructions

5.5 When changing oil 78

5.5.1 Oil change procedure 78

5.6 Common maintenance directions 79

5.6.1 Vibration 79
5.6.2 Ball and roller bearings 80
5.6.3 Friction coupling 82
5.6.4 Before shutdown 83
5.6.5 Before start-up 83
5.6.6 Lubrication of electric motor 84

5.7 Lifting instructions 85

50
5 Service instructions 5.1 Periodic maintenance

5.1 Periodic maintenance

5.1.1 Introduction
Periodic, preventive maintenance reduces the risk
of unexpected stoppages and breakdowns.
Maintenance logs are shown on the following
pages in order to facilitate periodic maintenance.

WARNING

Disintegration hazards

G0608011
Separator parts that are worn beyond their
safe limits or incorrectly assembled may Periodic maintenance prevents stoppages
cause severe damage or fatal injury.

5.1.2 Maintenance intervals

The following directions for periodic maintenance
give a brief description of which parts to clean,
check and renew at different maintenance
intervals.
The Service Logs for each maintenance interval
later in this chapter give detailed enumeration of
the checks that must be done.
Daily checks consist of simple check points to
carry out for detecting abnormal operating
conditions.
G0590511
Oil change interval is every 1500 hours or at
least once every year if the total number of
operating hours is less than 1500 hours. Maintenance log

Time of operation between oil changes can be

extended from the normal 1500 hours to 2000
hours if a synthetic oil of group D is used.
In seasonal operation change the oil before a new
period.

IS - Intermediate Service consists of an overhaul

of the separator bowl, inlet and outlet every 3
months or 2000 operating hours. Seals in bowl
and gaskets in the inlet/outlet device are
renewed.

51
5.1 Periodic maintenance 5 Service instructions

MS - Major Service consists of an overhaul of the

complete separator every 12 months or 8000
operating hours. An Intermediate Service is
performed, and the flat belt, friction elements,
seals and bearings in the bottom part are
renewed.
3-year service consists of service of the coupling
bearings, service of frame intermediate part and
renewal of frame feet. The rubber feet get harder
with increased use and age.

Service schedule
Oil change
Intermediate Service = IS
Major Service = MS
3-year Service

MS MS MS MS
IS IS IS IS IS IS IS IS IS IS IS IS IS IS IS IS

Installation 1st year 2nd year 3-year

Service

Other
Check and prelubricate spindle bearings of
separators which have been out of service for 6
months or longer.

NOTE
Do not interchange bowl parts!
To prevent mixing of parts, e.g. in an
installation comprising several machines of
the same type, the major bowl parts carry the
machine manufacturing number or its last
three digits.

52
5 Service instructions 5.1 Periodic maintenance

5.1.3 Maintenance procedure

At each Intermediate and Major Service, take a
copy of the Service Log and use it for notations
during the service.
An Intermediate and Major Service should be
carried out in the following manner:
1. Dismantle the parts as mentioned in the
Service Log and described in Chapter ‘‘6
Dismantling/Assembly” on page 87.
Place the separator parts on clean, soft
surfaces such as pallets.
2. Inspect and clean the dismantled separator
parts according to the Service Log.
3. Fit all the parts delivered in the Service kit
while assembling the separator as described
in chapter ‘‘6 Dismantling/Assembly” on page
87. The assembly instructions have
references to check points which should be
carried out during the assembly.

5.1.4 Service kits

Special service kits are available for Intermediate
Service (IS) and Major Service (MS).
For other services the spare parts have to be
ordered separately.

S0021031
Note that the parts for IS are not included in the
MS kit.
The contents of the service kits are described in Spare parts kits are available for Intermediate Service
and Major Service
the Spare Parts Catalogue.

NOTE
Always use Alfa Laval genuine parts as
otherwise the warranty will become invalid.
Alfa Laval takes no responsibility for the safe
operation of the equipment if non-genuine
spare parts are used.

53
5.2 Maintenance Logs 5 Service instructions

5.2 Maintenance Logs

Keep a log of inspection and maintenance
performed. Parts repeatedly renewed should be
given special consideration. The cause of
repeated failures should be determined and
corrected. Discuss your problems with an
Alfa Laval representative and, when necessary,
request a visit by an Alfa Laval Service engineer.
Rate of corrosion and erosion and notification of
cracks should also be a part of this log. Note the
extent of damage and date the log entries so that
the rate of deterioration can be observed.

5.2.1 Daily checks

The following steps should be carried out daily.

Main component and activity Part Page Notes

Inlet and outlet

Check for leakage Collecting cover -

Separator bowl

Check for vibration and noise 79

Worm wheel shaft and gear casing

Check for vibration and noise

Check Oil level in gear housing 55

Electrical motor

Check for heat, vibration and noise -1)

1)
See manufacturer’s instruction

54
5 Service instructions 5.2 Maintenance Logs

5.2.2 Oil change

The oil change and check of worm gear should be
carried out every 1500 * hours of operation.

Main component and activity Part Page Notes

Worm wheel shaft and gear housing

Check Worm wheel and worm 72

Renew Oil * in gear housing 55

* When using a group D oil, time of operation

between oil changes can be extended from the
normal 1500 hours to 2000 hours.

When the separator is running for short periods,

the lubricating oil must be changed every 12
months even if the total number of operating
hours is less than 1500 hours (2000 h).

In a new installation, or after replacement of gear,

change the oil after 200 operating hours.
See chapter ‘‘8 Technical reference” on page
133 for further information.

55
5.2 Maintenance Logs 5 Service instructions

5.2.3 IS - Intermediate Service

Name of plant: Local identification:
Separator: MAB 104B-14/24 Manufacture No./Year:
Total running hours: Product No.: 881241-08-17
Date: Signature:

Renew all parts included in the Intermediate Service kit (IS) and do the following activities.

Main component and activity Part Page Notes

Inlet and outlet, frame
Clean and inspect Housings and frame hood –
Separator bowl
Clean and inspect Bowl hood –
Top disc –
Bowl discs 77
Distributor –
Threads on lock ring and bowl 64
body
Check Galling of guide surface 64
Corrosion, erosion, cracks 59 - 62
Power transmission
Change Oil in oil sump 78
Electrical motor
Lubrication (if nipples are fitted) See sign on motor –
Vertical driving device
Lubricate Top bearing –
Signs and labels on separator
Check attachment and legibility Safety label on hood 166
Other plates and labels –

56
5 Service instructions 5.2 Maintenance Logs

5.2.4 MS-Major Service

Name of plant: Local identification:
Separator: MAB 104B-14/24 Manufacture No./Year:
Total running hours: Product No.: 881241-08-17
Date: Signature:

Main component and activity Part Page Notes

Inlet and outlet
Clean and inspect Threads of inlet –
Separator bowl
Clean and check Lock ring 64
Bowl hood –
Top disc –
Gravity disc –
Bowl discs 77
Distributor –
Bowl body –
Corrosion 59
Erosion 61
Cracks 62
Disc stack pressure 63
Renew O-rings and sealings –
Worm wheel shaft and gear housing
Check Worm wheel and worm 72
Radial wobble of worm wheel –
shaft
Axial play of coupling disc 68
Renew Oil in gear housing 55

57
5.2 Maintenance Logs 5 Service instructions

Main component and activity Part Page Notes

Vertical driving device
Clean and check Bowl spindle 67
Buffers –
Ball bearing housing 65
indentations
Radial wobble of bowl spindle 65
Renew Ball bearings and top bearing 67
springs
Brake
Clean and check Spring and brake shoe 70
Renew Brake plug 70
Friction coupling
Clean and check Friction coupling 82
Renew Friction pads 82
Lipseal ring 82
Frame feet
Renew Vibration dampers 120
Electrical motor
Clean and check Position of coupling disc 68
Lubrication (if nipples are fitted) – –
Signs and labels on separator
Check attachment and readability, Safety label on collecting 166
replace if needed cover

58
5 Service instructions 5.3 MS - Check points

5.3 MS - Check points

5.3.1 Corrosion
Evidence of corrosion attacks should be looked
for and rectified each time the separator is
dismantled. Main bowl parts such as the bowl
body, bowl hood and lock ring must be inspected
with particular care for corrosion damage.

WARNING

Disintegration hazard

Inspect regularly for corrosion damage.

Inspect frequently if the process liquid is
corrosive.

Always contact your Alfa Laval representative if

G0589811
you suspect that the largest depth of the
corrosion damage exceeds 1,0 mm or if cracks
have been found. Do not continue to use the Main bowl parts
separator until it has been inspected and given
clearance for operation by Alfa Laval.
Cracks or damage forming a line should be
considered as being particularly hazardous.

Non-stainless steel and cast iron parts

Corrosion (rusting) can occur on unprotected
surfaces of non-stainless steel and cast iron.
Frame parts can corrode when exposed to an
aggressive environment.

Stainless steel
Stainless steel parts corrode when in contact with
either chlorides or acidic solutions. Acidic
solutions cause a general corrosion. The chloride
corrosion is characterised by local damage such
as pitting, grooves or cracks. The risk of chloride
S0020611

corrosion is higher if the surface is:

Corrosion forming a line

59
5.3 MS - Check points 5 Service instructions

 Exposed to a stationary solution.

 In a crevice.
 Covered by deposits.
 Exposed to a solution that has a low pH
value.
Corrosion damage caused by chlorides on
stainless steel begins as small dark spots that
can be difficult to detect.
 Inspect closely for all types of damage by
corrosion and record these observations
carefully.
 Polish dark-coloured spots and other
corrosion marks with a fine grain emery cloth.

S0020511
This may prevent further damage
.
Polish corrosion spots
WARNING

Disintegration hazard

Pits and spots forming a line may indicate

cracks beneath the surface.
All forms of cracks are a potential danger and
are totally unacceptable.
Renew the part if corrosion can be
suspected of affecting its strength or
function.

Other metal parts

Separator parts made of materials other than
steel, such as brass or other copper alloys, can
also be damaged by corrosion when exposed to
an aggressive environment. Possible corrosion
damage can be in the form of pits and/or cracks.

60
5 Service instructions 5.3 MS - Check points

5.3.2 Erosion
Erosion can occur when particles suspended in
the process liquid slide along or strike against a
surface. Erosion can become intensified locally by
flows of higher velocity.

G0205221
WARNING Maximum depth of damage

Disintegration hazard

Inspect regularly for erosion damage. Inspect

frequently if the process liquid is erosive.

Always contact your Alfa Laval representative if

the largest depth of any erosion damage exceeds
1.0 mm. Valuable information as to the nature of
the damage can be recorded using photographs,
plaster impressions or hammered-in lead.
Erosion is characterised by:
 Burnished traces in the material.
 Dents and pits having a granular and shiny
surface.

Surfaces particularly subjected to erosion are:

1. The underside of the distributor in the vicinity
of the distribution holes and wings.
2. The internal surface of the bowl body that
faces the conical part of the distributor.
Look carefully for any signs of erosion damage.
Erosion damage can deepen rapidly and
consequently weaken parts by reducing the
thickness of the metal.

WARNING

Disintegration hazard

Erosion damage can weaken parts by

G0589911

reducing the thickness of the metal.

Renew the part if erosion can be suspected
of affecting its strength or function. Erosion check points

61
5.3 MS - Check points 5 Service instructions

5.3.3 Cracks
Cracks can initiate on the machine after a period
of operation and propagate with time.
 Cracks often initiate in an area exposed to
high cyclic material stresses. These are
called fatigue cracks.
 Cracks can also initiate due to corrosion in an
aggressive environment.
 Although very unlikely, cracks may also occur
due to the low temperature embrittlement of
certain materials.
The combination of an aggressive environment
and cyclic stresses will speed-up the formation of
cracks. Keeping the machine and its parts clean
and free from deposits will help to prevent
corrosion attacks.

WARNING

Disintegration hazard

All forms of cracks are potentially dangerous

as they reduce the strength and functional
ability of components.
Always renew a part if cracks are present.

It is particularly important to inspect for cracks in

rotating parts.
Always contact your Alfa Laval representative if
you suspect that the largest depth of the damage
exceeds 1.0 mm. Do not continue to use the
separator until it has been inspected and cleared
for operation by Alfa Laval.

62
5 Service instructions 5.3 MS - Check points

5.3.4 Disc stack pressure

The lock ring (1) should press the bowl hood (2)
firmly against the bowl body (3). The hood in turn
should exert a pressure on the disc stack (4),
clamping it in place.

NOTE
Insufficient pressure in disc stack can cause
out of balance vibration and reduced lifetime

G0592721
of ball bearings.

Compress the disc stack by tightening the lock

ring, see chapter ‘‘6.3.3 Bowl” on page 107.
Correct pressure is obtained when it is possible to
tighten the lock ring so far by hand that the -mark
on the lock ring is positioned 60° - 90° before the
mark on the bowl hood.
To achieve this, add an appropriate number of
discs to the top of the disc stack beneath the top
disc.
Then advance the lock ring by giving the spanner
handle some blows till the -marks are passed
and the bowl is fully assembled.

G0592711

63
5.3 MS - Check points 5 Service instructions

5.3.5 Lock ring; wear and damage

Excessive wear or impact marks on threads,
guide and contact surfaces of the lock ring, bowl
hood and bowl body may cause hazardous
galling.
Check the thread condition by tightening the lock
ring after removing the disc stack and bowl hood
O-ring from the bowl.

WARNING

Disintegration hazards

Wear on large lock ring thread must not

G0592411
exceed safety limit. The -mark on lock ring
must not pass opposite -mark by more than
the specified distance.

In a new bowl the alignment marks on the lock

ring and the bowl hood are exactly opposite each
other.
If thread wear is observed, mark the bowl hood at
the new position of the alignment mark on the
lock ring by punching in a new alignment mark.
Contact Your Alfa Laval representative
 If the original mark on the lock ring passes
the corresponding mark on the bowl hood by

G0592611
more than 25° which corresponds to 45 mm.
 If the alignment marks become illegible. The Maximum wear A=25°
thread wear needs to be inspected and the
new position of alignment marks determined.
Damage
The positions of the threads, contact and guide
surfaces are indicated by arrows in the illustration.
Clean the threads, contact and guide surfaces
with a suitable degreasing agent.
Check for burrs and protrusions caused by
impact. Watch your fingers for sharp edges.
If damage is established, rectify using a
whetstone or fine emery cloth (recommended
grain size 240).
If the damage is considerable, use a fine single-
cut file, followed by a whetstone.

64
5 Service instructions 5.3 MS - Check points

5.3.6 Radial wobble of bowl

spindle
 Spindle wobble is indicated by rough bowl run
(vibration).
The bowl spindle wobble should be checked if the
bowl spindle has been dismantled or if rough bowl
running (vibration) occurs.

NOTE
Spindle wobble will cause rough bowl run.
This leads to vibration and reduces lifetime of
ball bearings.

G0191521
Check the wobble before mounting the bowl. Maximum spindle wobble 0,15 mm
Before measuring, make sure that the buffer
plugs are properly tightened.

 Fit a dial indicator in a support and fasten it to

the frame.
 Remove the motor to get access to the
coupling drum. Use the coupling drum to
revolve the spindle manually.
 Measure the wobble at the top of the tapered
end of the spindle. Maximum permissible
radial wobble is 0.15 mm.
 If wobble is too large, renew all the ball

G0592811
bearings on the spindle.
Measure wobble after assembly. If it is still Rotate spindle by hand
excessive, the spindle is probably damaged and
must be renewed, contact your Alfa Laval
representative.

65
5.3 MS - Check points 5 Service instructions

5.3.7 Height position of bowl /

bowl spindle
Whenever the bowl spindle has been removed, its
height position relative to the frame must be
checked.
The bowl must be in place in the separator. The
lock ring tightened. Make sure the alignment
marks on bowl hood and lock ring are in front of

G0599311
each other.

For correct height position the distance (H)

between the top face of the large lock ring and the
top rim of frame must be 34-36 mm.
Alfa Laval ref. 537541, rev. 0

G0607811
Adjustment is made with adjustment rings (1)
under the thrust bearing at the bottom of the
spindle.

G0607911

66
5 Service instructions 5.3 MS - Check points

5.3.8 Bowl spindle cone and bowl

body nave
Impact marks on the spindle cone or in the bowl
body nave may cause poor fit and out-of-balance
vibrations.
The bowl spindle and the nave should also be
checked if the bowl spindle has been dismantled
or if the bowl runs roughly.
Corrosion may cause the bowl to stick firmly to
the spindle cone and cause difficulties during the
next dismantling.
 Remove any impact marks with a scraper
and/or whetstone.

G0590911
Rust can be removed by using a fine-grain emery
cloth (e.g. No. 320). Finish with polishing paper
(e.g. No. 600). Oil the bowl spindle to prevent corrosion

NOTE
Always use a scraper with great care. The
conicity must not be marred.

67
5.3 MS - Check points 5 Service instructions

5.3.9 Coupling disc of motor

The position of the coupling disc on the motor
shaft is establishing the location of the friction
pads inside the coupling.
If the coupling disc is loosened without first
marking its position on the motor shaft, the
correct position must be determined again.
1. Measure the distance on the frame.

G0593311
Frame distance

2. Measure the distance on the motor.

G0593411
Motor distance

3. The coupling disc is in correct position when

frame distance (1) is 32 mm larger than motor
distance (2), see the illustration.
G0593511

Position of coupling disc

68
5 Service instructions 5.3 MS - Check points

5.3.10 Friction pads

Worn or oily pads will cause a long running-up
period. Renew all the pads even when only one of
them is worn.
If the pads are oily:
 Clean the pads as well as the inside of the
coupling drum with a suitable degreasing
agent.


G0593221
Roughen up the friction surfaces of the pads
with a coarse file.
Friction pads

CAUTION
Inhalation hazard

When handling friction blocks/pads use a dust

mask to make sure not to inhalate any dust.
Do not use compressed air for removal of
any dust. Remove dust by vacuum or wet
cloth.
See Safety instructions for environmental
issues regarding correct disposal of used
friction blocks/pads.

69
5.3 MS - Check points 5 Service instructions

5.3.11 Brake
A worn or oily brake lining will lengthen the
stopping time. Remove the bracket with the brake.
Examine the friction element.
 Renew the lining when the friction material is
worn down.
 Remove rivet head by drilling.

G0607411
 Punch out rivet.
 Fasten the new lining to brake shoe with
Friction lining
a new rivet.
 If the friction element is oily: Clean the brake
lining and the outside surface of the bowl
body with a suitable degreasing agent.

Checking the brake

After the brake assembly has been fitted, release
the brake and rotate the bowl slowly by hand. If a
scraping noise is heard, the friction element is
probably touching the bowl surface.
For normal stopping time see ‘‘8.2 Technical data”
on page 138.

70
5 Service instructions 5.3 MS - Check points

5.3.12 Top bearing springs

Weakened or broken buffer springs (2) may give
rise to machine vibration (rough bowl running).
The condition (stiffness) of a spring can hardly be
determined without using special testing
equipment. So, an estimation of the spring
condition must be based on the knowledge of the
machine run before the overhaul. It is
recommended, however, to renew all the springs
at the annual overhaul.
In case of a sudden spring fracture, all springs
should be renewed even when only one spring
has broken.

5.3.13 Ball bearing housing

 Defective contact surfaces for the buffers on
the ball bearing housing may give rise to
machine vibration (rough bowl running).
Examine the contact surface for the buffers (1) on
the ball bearing housing (3). In case of defects
(indentations deeper than 0.1 mm) renew the
housing as well as buffers and springs.

G0635011
1. Radial buffer
2. Buffer spring
3. Ball bearing housing

71
5.3 MS - Check points 5 Service instructions

5.3.14 Worm wheel and worm;

wear of teeth
Check the teeth of worm wheel and worm for
wear, see ‘‘ Tooth appearance examples” on page
73.
Examine the contact surfaces and compare the
tooth profiles. The gear may operate satisfactorily
even when worn to some degree.

NOTE

G0592921
Renew both worm wheel and worm at the
same time, even if only one of them is worn.
1. Worm wheel
2. Worm (part of bowl spindle)

NOTE
Presence of metal chips in the oil bath is an
indication that the gear is wearing
abnormally.

When using mineral-type oil in the worm gear

housing, the presence of black deposits on the
spindle parts is an indication that the oil base has
deteriorated seriously or that some of the oil
additives have precipitated. If pits are found on
the worm gear, the cause could be that the
additives are not suitable for this purpose.
In all these cases it is imperative to change to a
high-temperature oil. See chapter ‘‘8.9
G0205411

Lubricants” on page 149.

72
5 Service instructions 5.3 MS - Check points

Tooth appearance examples

Satisfactory teeth
Uniform wear of contact surfaces. Surfaces are
smooth.
Good contact surfaces will form on the teeth when
the gear is subjected to only moderate load
during its running-in period.

G0538711
Satisfactory teeth

Worn teeth
Permissible wear is as a rule 1/3 of the thickness
of the upper part of a tooth, provided that
 the wear is uniform over the whole of the flank
of a tooth

G0538811
 and all teeth are worn in the same way.

Worn teeth
Spalling
Small bits of the teeth have broken off, so-called
spalling. This is generally due to excessive load
or improper lubrication. Damage of this type need
not necessitate immediate replacement, but
careful checking at short intervals is imperative.

G0538911
Spalling

Pitting
Small cavities in the teeth, so-called pitting, can
occur through excessive load or improper
lubrication. Damage of this type need not
necessitate immediate replacement, but careful
checking at short intervals is imperative.
G0539011

Pitting

73
5.4 Cleaning 5 Service instructions

5.4 Cleaning

5.4.1 External cleaning

The external cleaning of the frame and motor
should be restricted to brushing, sponging or
wiping while the motor is running or is still hot.

G0602321
Use a sponge or cloth and a brush when cleaning

Never wash down a separator with a direct water

stream.
Totally enclosed motors can be damaged by
direct hosing to the same extent as open motors
and even more than those, because:
 Some operators believe that these motors are
sealed, and normally they are not.
 A water jet played on these motors will

G0590021
produce an internal vacuum, which will suck
the water between the metal-to-metal contact
surfaces into the windings, and this water Never wash down a separator with a direct water
cannot escape. stream or playing a water jet on the motor
 Water directed on a hot motor may cause
condensation resulting in short-circuiting and
internal corrosion.
Be careful even when the motor is equipped with
a protecting hood. Never play a water jet on the
ventilation grill of the hood.

74
5 Service instructions 5.4 Cleaning

5.4.2 Cleaning agents

When using chemical cleaning agents, make sure
you follow the general rules and supplier’s
recommendations regarding ventilation,
protection of personnel, etc.

For separator bowl, inlet and outlet

A chemical cleaning agent must dissolve the
deposits quickly without attacking the material of
the separator parts.
 For cleaning of lube oil separators the most

S0008511
important function of the cleaning agent is to
be a good solvent for the gypsum in the
sludge. It should also act as a dispersant and Alfa Laval cleaning liquid for lube and fuel oil
emulsifier for oil. It is recommended to use separators is available in 25 litres plastic containers
Alfa Laval cleaning liquid for lube oil
separators which has the above mentioned
qualities. Note that carbon steel parts can be
damaged by the cleaning agent if submerged
for a long time.
 Fuel oil sludge mainly consists of complex
organic substances such as asphaltenes.
The most important property of a cleaning
liquid for the removal of fuel oil sludge is the
ability to dissolve these asphaltenes.
Alfa Laval cleaning liquid of fuel oil
separators has been developed for this
purpose. The liquid is water soluble, non-
flammable and does not cause corrosion of
brass and steel. It is also gentle to rubber and
nylon gaskets in the separator bowl.Before
use, dilute the liquid with water to a
concentration of 3-5%. Recommended
cleaning temperature is 50-70 °C.

CAUTION

Skin irritation hazard

Read the instructions on the label of the

plastic container before using the cleaning
liquid.
Always wear safety goggles, gloves and
protective clothing as the liquid is alkaline
and dangerous to skin and eyes.

75
5.4 Cleaning 5 Service instructions

For parts of the driving devices

Use white spirit, cleaning-grade kerosene or
diesel oil.

G0592921
1. Worm wheel
2. Worm

Oiling (protect surfaces against corrosion)

Protect cleaned carbon steel parts against
corrosion by oiling. Separator parts that are not
assembled after cleaning must be wiped and
coated with a thin layer of clean oil and protected
from dust and dirt.

G0590911

76
5 Service instructions 5.4 Cleaning

5.4.3 Cleaning of bowl discs

Bowl discs
Handle the bowl discs carefully so as to avoid
damage to the surfaces during cleaning.

NOTE
Mechanical cleaning is likely to scratch the
disc surfaces causing deposits to form
quicker and adhere more firmly.
A gentle chemical cleaning is therefore
preferable to mechanical cleaning.

1. Remove the bowl discs from the distributor

and lay them down, one by one, in the
cleaning agent.

G0065831
2. Let the discs remain in the cleaning agent
until the deposits have been dissolved. This Put the discs one by one into the cleaning agent
will normally take between two and four
hours.
3. Finally clean the discs with a soft brush.

CAUTION

G0065841
Cut hazard

The discs have sharp edges. Clean the discs with a soft brush

77
5.5 When changing oil 5 Service instructions

5.5 When changing oil

Check at each oil change

Check the teeth of both the worm wheel and
worm for wear, see ‘‘5.3.14 Worm wheel and
worm; wear of teeth” on page 72.

5.5.1 Oil change procedure

NOTE
Before adding or renewing lubricating oil in
the worm gear housing, the information
concerning different oil groups, handling of
oils, oil change intervals etc. given in
‘‘8.9 Lubricants” on page 149 must be well
known.

1. Place a collecting tray under the drain hole,

remove the drain plug and drain off the oil.

CAUTION

Burn hazards

G0602621
Lubricating oil and various machine surfaces
can be sufficiently hot to cause burns.

2. Fill new oil in the worm gear housing. The oil

level should be slightly above middle of the
sight glass.
The correct oil volume is 0.8 litres.
G0602711

Check oil level

78
5 Service instructions 5.6 Common maintenance directions

5.6 Common
maintenance
directions

5.6.1 Vibration
Vibration or noise often indicates that something
is incorrect.
Use vibration analysis instrument to periodically
check and record the level of vibration. See the
illustration where to take measurements.

S0055611
The level of vibration should not exceed 9.0 mm/s
(RMS). Stop the separator and identify the cause.
If the separator begins to vibrate excessively
during operation, proceed as described in ‘‘4.1.8
Emergency stop” on page 44.

79
5.6 Common maintenance directions 5 Service instructions

5.6.2 Ball and roller bearings

Special-design bearings for the bowl spindle
The bearings used for the bowl spindle are
special to withstand the speed, vibration,
temperature and load characteristics of high-
speed separators.

G0587321
Only Alfa Laval genuine spare parts should be
used.
1. Outer race
A bearing that in appearance looks equivalent to 2. Ball/roller
the correct may be considerably different in 3. Inner race
various respects: inside clearances, design and 4. Cage
tolerances of the cage and races as well as
material and heat treatment.

NOTE
Using an incorrect bearing can cause a
serious breakdown with damage to
equipment as a result.
Do not re-fit a used bearing. Always replace
it with a new.

Dismantling
For bearings where no driving-off sleeve is
included in the tool kit, remove the bearing from
its seat by using a puller. If possible, let the puller
engage the inner ring, then remove the bearing
with a steady force until the bearing bore
completely clears the entire length of the
cylindrical seat.
The puller should be accurately centred during
dismantling; otherwise, it is easy to damage the
G0587411

seating.

For bearings where no driving-off sleeve is included in

NOTE the tool kit, use a puller when removing bearings

Do not hit with a hammer directly on the

bearing.

80
5 Service instructions 5.6 Common maintenance directions

Cleaning and inspection

Check shaft (spindle) end and/or bearing seat in
the housing for damage indicating that the
bearing has rotated on the shaft (spindle) and/or
in the housing respectively. Renew the damaged
part(s), if the faults cannot be remedied by
polishing.

Assembly
 Leave new bearings in original wrapping until
ready to fit. The anti-rust agent protecting a
new bearing should not be removed before
use.
 Use the greatest cleanliness when handling
the bearings.
 To facilitate assembly and also reduce the
risk of damage, first clean and then lightly oil
the bearing seating on shaft (spindle) or
alternatively in housing, with a thin oil.

G0587511
Clean and lightly oil the bearing seating before
assembly
 When assembling ball bearings, the bearings
must be heated in oil to max. 125 °C.

NOTE
Heat the bearing in a clean container.
Use only clean oil with a flash point above
250 °C.
G0587611
The bearing must be well covered by the oil
and not be in direct contact with the sides or The bearing must not be in direct contact with the
the bottom of the container. Place the container
bearing on some kind of support or
suspended in the oil bath.

WARNING

Burn hazards

Use protective gloves when handling the

heated bearings.

81
5.6 Common maintenance directions 5 Service instructions

 There are several basic rules for assembling

cylindrical bore bearings:
 Never directly strike a bearing’s rings,
cage or rolling elements while
assembling. A ring may crack or metal
fragments break off.
 Never apply pressure to one ring in order
to assemble the other.
 Use an ordinary hammer. Hammers with
soft metal heads are unsuitable as
fragments of the metal may break off and
enter the bearing.
 Make sure the bearing is assembled at a
right angle to the shaft (spindle).
 If necessary use a driving-on sleeve that
abuts the ring which is to be assembled with
an interference fit, otherwise there is a risk
that the rolling elements and raceways may
be damaged and premature failure may

G0587711
follow.

Use a driving-on sleeve for bearings that are not

5.6.3 Friction coupling heated

If the separator does not attain full speed within

about 2 minutes, the friction elements or the
coupling may be worn or greasy. The friction
elements must then be replaced with new ones or
thoroughly cleaned from grease.
Before the friction coupling is assembled,
examine all parts thoroughly for wear and
corrosion.
G0593211

CAUTION A worn coupling increase start-up time

Inhalation hazard

When handling friction blocks/pads use a dust

mask to make sure not to inhalate any dust.
Do not use compressed air for removal of
any dust. Remove dust by vacuum or wet
cloth.
See Safety instructions for environmental
issues regarding correct disposal of used
friction blocks/pads.

82
5 Service instructions 5.6 Common maintenance directions

5.6.4 Before shutdown

Before the separator is shutdown for a period of
time, the following must be carried out:
 Remove the bowl, according to chapter ‘‘6
Dismantling/Assembly” on page 87.

NOTE
The bowl must not be left on the spindle
during standstill for more than one week.
Vibration in foundations can be transmitted to
the bowl and produce one-sided loading of
the bearings. This can cause bearing failure.

 Protect cleaned carbon steel parts against

corrosion by oiling. Separator parts that are
not assembled after cleaning must be wiped
and protected against dust and dirt.
 Protect the spindle taper from corrosion by
lubricating it with oil.

5.6.5 Before start-up

 If the separator has been shut-down for more
than 3 months but less than 12 months, an
Intermediate Service (IS) has to be made. 
In addition to IS-service: Lubricate the top
bearing with 10 mil. of lubricating oil.
 If the electric motor is equipped with grease
nipples; pre-lubricate according to the
instructions in ‘‘5.6.6 Lubrication of electric
motor” on page 84 and/or the manufacturers
information. See ‘‘8.9 Lubricants” on page
149 for type of grease.

If the motor has no grease nipples, it is
permanently lubricated. No action is needed.
 If the shut-down period has been longer than
12 months, a Major Service (MS) should be
carried out.

83
5.6 Common maintenance directions 5 Service instructions

5.6.6 Lubrication of electric motor

For motors equipped without permanently
lubricated bearings, correct lubrication interval
and recommended type of grease can be found in
the manufacturer's instructions.

Manual lubrication
Regreasing while motor is running
 Remove grease outlet plug or open closing
valve if fitted.
 Be sure that the lubrication channel is open.
 Press the specified amount of grease into the
bearing.
 Let the motor run 1-2 hours to ensure that all
excess grease is forced out of the bearing.
Close the grease outlet plug or closing valve if
fitted.
Regreasing while motor is at standstill
Regrease motors while running. If this is not
possible, lubrication can be carried out while the
machine is at a standstill.
 In this case, use only half the quantity of
grease, then run the motor for a few minutes
at full speed.
 When the motor has stopped, press the rest
of the specified amount of grease into the
bearing.
After 1-2 running hours close grease outlet plug
or closing valve if fitted.

84
5 Service instructions 5.7 Lifting instructions

5.7 Lifting instructions

Alfa Laval ref. 558102, rev. 0

For lifting parts and assemblies of parts use lifting

slings, working load limit (WLL): 300 kg.

Lifting the separator

1. Remove the separator bowl, see dismantling
instructions in ‘‘6.2.1 Bowl” on page 90.
2. Attach endless slings or cables to the
separator as illustrated. Check that the
hinged bolts fixing the separator cover is
tightened.
3. Lift and handle with care.
Weight to lift: 200 kg.

NOTE
Remove the separator bowl before lifting to
prevent bearing damage.

WARNING

Crush hazards

A dropped separator can cause accidents

resulting in serious injury to persons and
damage to equipment.
G0625911

Do not lift the separator in any other way

85
5.7 Lifting instructions 5 Service instructions

86
6 Dismantling/Assembly

Contents

6.1 General 88
6.1.1 References to check points 88
6.1.2 Tools 88
6.1.3 Tightening of screws 88

6.2 Dismantling 89
6.2.1 Bowl 90
6.2.2 Vertical driving device 93
6.2.3 Horizontal driving device 96

6.3 Assembly 100

6.3.1 Horizontal driving device 101
6.3.2 Vertical driving device 104
6.3.3 Bowl 107

6.4 Feed and discharge pumps 110

6.4.1 General description 110
6.4.2 Dismantling 112
6.4.3 Assembly 116

6.5 Frame feet 120

6.5.1 Mounting of new frame feet 120

87
6.1 General 6 Dismantling/Assembly

6.1 General
The parts must be handled carefully. Don’t place
parts directly on the floor, but on a clean rubber
mat, fibreboard or a suitable pallet.

6.1.1 References to check points

In the text you will find references to the check
point instructions in Chapter 5. The references
appear in the text as in the following example:
✔ Check point
‘‘5.3.4 Disc stack pressure” on page 63.
In this example, look up check point ‘‘5.3.4 Disc
stack pressure” on page 63 for further
instructions.

6.1.2 Tools
Special tools from the tool kit shall be used for
dismantling and assembly. The special tools are
specified in the Spare Parts Catalogue.
For lifting parts and assemblies of parts use lifting
slings, working load limit (WLL): 300 kg.

6.1.3 Tightening of screws

When tightening screws, use the torques stated in
the table below unless otherwise stated. The
figures apply to lubricated screws tightened with a
torque wrench.

METRIC THREAD
Torques in Nm
Stainless Carbon
Thread steel steel
M6 7 8
M8 17 20
M10 33 39
M12 57 68
M16 140 155
M20 275 325
M24 470 570

88
6 Dismantling/Assembly 6.2 Dismantling

6.2 Dismantling
 To avoid accidental start, switch off and lock
power supply.

WARNING

S0051011
Entrapment hazards Lock power supply

Make sure that rotating parts have come to a

complete standstill before starting any
dismantling work.
The revolution counter indicates if separator
parts are rotating or not.

S0051121
Do not dismantle any parts before complete standstill

89
6.2 Dismantling 6 Dismantling/Assembly

6.2.1 Bowl
1. Be sure the bowl has stopped rotating.








G0246221


 Revolution counter indicates rotation


2. Loosen the hook bolts and remove the

collecting cover.

G0600211

Hook bolts

3. Tighten both lock screws.

The bowl parts can remain hot for a
considerable time after the separator has
come to a standstill.
G0595011

Tighten both lock screws

90
6 Dismantling/Assembly 6.2 Dismantling

4. Unscrew the small lock ring by using the

special tool, “Spanner for small lock ring”.
Left-hand thread!








G0595111


 Small lock ring

5. Unscrew the large lock ring by using the

special tool; “Spanner for lock ring” and a tin
hammer.
Left-hand thread!

G0595211
Large lock ring

6. Lift off gravity disc.

Note! If the gravity disc has to be replaced
owing to changed operating conditions.
Lift out the top disc, disc stack and distributor.

CAUTION

Cut hazard
G0595311

Sharp edges on the separator discs may

cause cuts.

91
6.2 Dismantling 6 Dismantling/Assembly

7. Unscrew the cap nut.

Release the two lock screws.
Lift out the bowl body using the hand tool.











G0595411


 1. Cap nut
 2. Both lock screws
3. Lift bowl body from spindle

8. Soak and clean all parts thoroughly in

suitable cleaning agent, see ‘‘5.4 Cleaning”
on page 74.
Remove O-rings and renew them with spares
from the Major Service kit.
✔ Check point
‘‘5.3.1 Corrosion” on page 59,
‘‘5.3.2 Erosion” on page 61,
‘‘5.3.3 Cracks” on page 62.

G0590911

92
6 Dismantling/Assembly 6.2 Dismantling

6.2.2 Vertical driving device

Remove the outlet housings, feed and discharge
pumps and raise the collecting cover. Remove
also the separator bowl.
Before dismantling, in the case of 8000 hours
service, or if the separator vibrates while running:
✔ Check point
‘‘5.3.6 Radial wobble of bowl spindle” on page
65.
1. Drain off the oil
Force out the conical pin of the worm wheel.










G0608611



2. Push worm wheel aside.

G0608711

93
6.2 Dismantling 6 Dismantling/Assembly

3. Loosen the spring casing.

Fit the cap nut to shaft top and lift out the
vertical driving device.

G0597531
4. Loosen the buffers and remove housing.












G0608811
5. Remove the collar.
Left-hand thread!

G0608911

6. Use the puller tool to dismantle the upper ball

bearing.
G0609011

94
6 Dismantling/Assembly 6.2 Dismantling

7. Remove the snap ring.

WARNING

Risk for eye injury by flying

snap ring

Use the correct pliers for dismantling and

assembly of snap ring to avoid accidental

G0609111
release.

8. Remove the ball bearing sleeve together with

thrust ball bearing and height adjusting
ring(s).

G0609211
9. Pull off lower ball bearing gently.

G0609311

95
6.2 Dismantling 6 Dismantling/Assembly

6.2.3 Horizontal driving device

1. Drain gear housing from oil see ‘‘5.5.1 Oil
change procedure” on page 78. Remove
guard for worm wheel and force out the
conical pin in worm wheel.








G0608611



2. Remove lock ring, sight glass and seal ring

(valid for machine with feed and discharge
pump).
For machine without pump go to point 5.

G0609411
3. Loosen screws of inspection box.

G0609511

96
6 Dismantling/Assembly 6.2 Dismantling

4. Remove coupling guard and force out the

tubular pin in coupling half on horizontal
driving shaft.










G0609611


5. Loosen end shield. Remove pump together

with inspection box.
For machine without pump: Loosen and
remove guard. Force out the pin at shaft end
and remove space sleeve.

G0609711
6. Remove the motor.

CAUTION
Inhalation hazard G0596611

When handling friction blocks/pads use a dust

mask to make sure not to inhalate any dust.
Do not use compressed air for removal of
any dust. Remove dust by vacuum or wet
cloth.
See Safety instructions for environmental
issues regarding correct disposal of used
friction blocks/pads.

97
6.2 Dismantling 6 Dismantling/Assembly

7. Renew the pads on the friction blocks.

When refitting the blocks make sure the arrow
on each block points-in the same direction of
rotation See the arrow on the frame.
Secure the blocks with washer and split pin.
If the friction elements are worn: Fit new
ones.
Renew all friction elements even if only

G0593221
one is worn.
If the friction elements are only greasy:
Clean the friction elements and the inside of
the coupling drum with a degreasing agent.
8. Loosen the three screws holding the sealing
washer.

G0610011
9. Knock gently on shaft end to get the bearings
out of their seats. Then use the worm wheel
to knock off bearing from shaft. Remove
bearing and worm wheel.

G0610111

10. Remove the horizontal driving shaft

G0596811

98
6 Dismantling/Assembly 6.2 Dismantling

11. Use the puller tool to pull off the protecting

cover and ball bearing. Protect end of worm
wheel shaft with a washer.

G0596911

99
6.3 Assembly 6 Dismantling/Assembly

6.3 Assembly
Clean all parts in a degreasing agent and renew
parts supplied in the Spare parts kits.
✔ Check point
‘‘5.3.1 Corrosion” on page 59,
‘‘5.3.2 Erosion” on page 61,
‘‘5.3.3 Cracks” on page 62,
‘‘5.3.12 Top bearing springs” on page 71,
‘‘5.3.13 Ball bearing housing” on page 71,
‘‘5.3.14 Worm wheel and worm; wear of
teeth” on page 72.

100
6 Dismantling/Assembly 6.3 Assembly

6.3.1 Horizontal driving device

1. Fit protection cover on worm wheel shaft.
Heat bearing in oil before mounting onto
shaft.

G0638111
2. Clean the ball bearing housing in the frame
and oil the outer race of the ball bearing.
Fit the gasket and enter the shaft through the
bearing seat in the frame.

G0610211

101
6.3 Assembly 6 Dismantling/Assembly

3. Enter the worm wheel on shaft and force the

worm wheel shaft to its position in the frame,
so that the ball bearing enters correctly into
its seat.
Observe that largest ends of the holes for
conical pin in shaft and worm wheel should
point in same direction.

WARNING

Disintegration hazard

When replacing the gear, always make sure

that the new worm wheel and worm have the
same number of teeth as the old ones.

G0608711
4. Secure the protection cover with the three
screws.
Fit the ‘loose’ ball bearing. Secure the worm
wheel with the conical pin.

G0610811

102
6 Dismantling/Assembly 6.3 Assembly

5. Lift the motor in position and tighten the motor

bolts.
If the coupling disc has been loosened
without first marking its position on the motor
shaft, the correct position for position of
coupling disc must be determined again.
✔ Check point
‘‘5.3.9 Coupling disc of motor” on page 68.

WARNING

Disintegration hazards

When power cables have been connected,

G0609911
always check direction of rotation. If
incorrect, vital rotating parts could unscrew
causing disintegration of the machine.

6. Fit coupling half on worm wheel shaft before

mounting the pump.Remember the gasket.
Fit the coupling guard with two screws.
For machine without pump fit distance
sleeve and pin at the end of horizontal shaft.
Fit and secure the guard.

G0611011

103
6.3 Assembly 6 Dismantling/Assembly

6.3.2 Vertical driving device

Before assembling the bowl spindle, make sure
the relevant checks have been carried out.
Wipe off and oil the bearing seat before fitting the
ball bearing.
Inspect the tapered end of the bowl spindle and
assemble ball bearings.
Heat the new ball bearings in oil to max. 125 °C.

NOTE
Always fit new bearings.
If any doubt how to mount roller bearings in a
correct way, see the detailed description in
chapter ‘‘5.6.2 Ball and roller bearings” on

G0587611
page 80.

1. Fit the two bearings onto the shaft.

CAUTION

Burn hazards

Use protective gloves when handling the

heated bearings.
G0597411

104
6 Dismantling/Assembly 6.3 Assembly

2. Fit ball bearing housing and throw-off collar.

Left-hand thread!

G0610411
3. Fit the ball bearing sleeve together with thrust
bearing and height adjusting ring.










G0610511

4. Secure the assembly with the snap ring.

WARNING

Risk for eye injury by flying

snap ring

Use the correct pliers for dismantling and

assembly of snap ring to avoid accidental
G0609111

release.

105
6.3 Assembly 6 Dismantling/Assembly

5. Place spring casing to rest on shoulder of

upper ball bearing housing. Fit buffers and
springs into casing. Tighten the caps.

G0608811
6. Place the gasket in the right position at the
bottom of the separator frame.
7. Fit the cap nut to the spindle and lower the
assembly into the separator frame. Fit the
washers and tighten the three screws.

G0597511

106
6 Dismantling/Assembly 6.3 Assembly

6.3.3 Bowl
Make sure that the check points are carried out
before and during assembly of the separator
bowl.
✔ Check points
‘‘5.3.8 Bowl spindle cone and bowl body
nave” on page 67.

1. Wipe off spindle top and nave bore in the

bowl body. Apply a few drops of oil onto the
taper, smear it over the surface and wipe it off
with a clean cloth.

G0598811
2. Fit the distributor with the disc stack.
Fit the top disc and bowl hood.

G0598911
3. Make sure the guides are in correct position.
G0599011

107
6.3 Assembly 6 Dismantling/Assembly

4. Secure the bowl from rotating. Screw in both

lock screws.

G0599211
5. Degrease lock ring threads, contact and
locating faces (see arrows above). Apply
Molykote 1000 paste to the threads and faces
stated.
Brush in the paste according to the
manufacturer’s direction.

G0599111
6. Tighten lock ring counter-clockwise (left-hand
thread) until bowl hood lies tightly against
bowl body (in a new bowl marks will now be in
line with each other.
Left-hand thread!

G0599311
WARNING

Disintegration hazard

The assembly mark on the lock ring must

never pass the mark on the bowl hood by
more than 25° (or 45 mm).

✔ Check point
‘‘5.3.4 Disc stack pressure” on page 63.

108
6 Dismantling/Assembly 6.3 Assembly

7. Release both lock screws and tighten clamp

bolts.

NOTE
The two lock screws must be fully released to
prevent risk of damage to bowl body.

G0599411
8. Fit the connecting hoses if they have been
removed. Make sure to fit their gasket rings

G0593911

109
6.4 Feed and discharge pumps 6 Dismantling/Assembly

6.4 Feed and discharge

pumps

6.4.1 General description

1. Relief/safety valve:
Examine valve cone and valve seat.
2. Bushings:
Renew the bushings if they are scratched or
there is a play between shaft and bushing.
3. Wearing seals:
Renew the seals if the surface is rough,
crackled or dented by the impeller.

G0594121
Double pump

4. Lipseal rings:
Renew the rings at the annual overhaul.
Important! Turn the rings the right way
round.
5. Flexible coupling:
Check wear on flexible element.
6. Impeller shaft:
Check wear on sealing surface on the
impeller shaft.
G0607611

7. Disengagement:
The feed pump can be disengaged by turning 1. Bushings
the impeller (6), thereby placing the driving 2. Wearing seals
blade of the impeller in the recess of the 3. Lipseal rings
4. Flexible coupling
shield.
5. Impeller shaft
6. Disengagement
7. Axial play

110
6 Dismantling/Assembly 6.4 Feed and discharge pumps

8. Axial play:
The total axial play (1) must be 0.1 - 0.3 mm.
If the play is too large even though the
wearing seals have been renewed, it can be
compensated by adding a brass leaf liner.
Insert the liner at (2). If the play is too small,
grind off the bearing holder (3).

G0607711
Axial play 0.1 - 0.3 mm

111
6.4 Feed and discharge pumps 6 Dismantling/Assembly

6.4.2 Dismantling
1. Remove the pipe connections of the pump.
Screw off the lock ring of the sight glass.
Remove the upper gasket and the sight glass.

Remove the screws of the control housing.

Lift the control housing with the lower gasket
and the connecting piece.
Unscrew the oil drain plug and empty the
gear housing of oil.









G0594111



2. Remove the guard over the flexible coupling.

G0661411

112
6 Dismantling/Assembly 6.4 Feed and discharge pumps

3. Drive out the tubular pins from the worm

wheel shaft and impeller shaft. Turn the bowl
by hand until the pins are in a convenient
position.

G0661311
4. Undo the four screws holding the pump
shield, remove shield.
Do not lose the valve cone and spring.










G0661111



5. Insert two screws into the centre hole of the

impellers. Use the screws as a handle to
withdraw the impellers.
G0661611

113
6.4 Feed and discharge pumps 6 Dismantling/Assembly

6. Remove the impellers for inlet pump.

G0661711
7. Repeat step 5 and 6 for the outlet pump
impellers.










G0661211




8. Undo the four screws holding the pump

housing. Remove housing, do not lose valve
cone and spring.

G0594141

114
6 Dismantling/Assembly 6.4 Feed and discharge pumps

9. Check that the lipseal rings are in good

condition.
If the seal rings are worn or damaged:
Remove the pump shield from the separator
frame, knock out the old sealring(s) and
replace them.

G0664111

115
6.4 Feed and discharge pumps 6 Dismantling/Assembly

6.4.3 Assembly
1. Fit new lipseal rings. Be sure to turn it the
right way around, the closed side should point
outwards to air. Start with the one at
pumpside of the shield.

G0594521
2. Lift pumpshield in place and secure it with
one screw at top of shield, do not tighten it
fully. Be careful not to damage the seal ring
when entering the worm wheel shaft.

G0666011

3. Fit and secure the coupling half with the

larger pinhole on worm wheel shaft. Put the
flexible element in place.
G0661321

116
6 Dismantling/Assembly 6.4 Feed and discharge pumps

4. Place the O-ring in pump housing.

Put the spring and valve cone in place in the
pump shield.

G0594161
5. Place the bushing with shoulder in pump
shield (flat side vertical pointing to center).
Enter the other bushing into pump housing
with flat side to center.
Fit housing by entering over the bushing in
shield. Ensure that valve cone enters the
valve seat.
Fit and tighten the screws.

G0670111
6. Put the wear gaskets one at each side of the
outlet impellers, then place the bushings one
in opposite direction to the other on impeller
shaft.
Keep all parts together and push the package
in to pump housing.
G0661221

117
6.4 Feed and discharge pumps 6 Dismantling/Assembly

7. Repeat point 6 for inlet impellers.

Note that the tongue on impeller shaft should
fit in the slot of outlet impeller shaft.
Press gently until the impeller shaft is visible
at the coupling side. Enter the coupling half
on shaft and press the package in place.

G0661721
8. Fit and tighten the six screws for bearing
shield.
9. Secure the coupling half with the pin.
Rotate the bowl to align the holes.

G0661331
10. Place O-ring in the groove in pump housing
and the spring and valve cone in pump shield.
Fit pump shield and fasten it with four screws.
G0661111

118
6 Dismantling/Assembly 6.4 Feed and discharge pumps

11. Fasten the guard over the flexible coupling.

G0661411
12. Fit control housing and its pipes.

G0594151

13. Connect all pipings.

119
6.5 Frame feet 6 Dismantling/Assembly

6.5 Frame feet

When renewing the frame feet, the separator
must be lifted.
See ‘‘5.7 Lifting instructions” on page 85.

NOTE
Always remove the bowl before lifting the
separator.

When lifting and moving the separator, follow

normal safety precautions for lifting large heavy
objects.

6.5.1 Mounting of new frame feet

1. When the separator has been lifted, remove
the old vibration dampers (3).
2. Fit the new vibration dampers on the bolts.
3. Lift the separator in to position.
4. Tighten the nut (2) with 16 Nm.
Hold the nut firmly and secure with the lock
nut (1). Repeat for the other frame feet.

G0920511
Frame foot with vibration damper
1. Lock nut
2. Nut
3. Vibration damper

120
7 Trouble-tracing

Contents

7.1 Trouble tracing procedure 123

7.2 Mechanical function 123

7.2.1 The separator does not start 123
7.2.2 Start-up time too long 123
7.2.3 Starting power too low 124
7.2.4 Starting power too high 124
7.2.5 Separator vibrates excessively 
during starting sequence 125
7.2.6 Separator vibrates excessively 
during normal running 125
7.2.7 Smell 126
7.2.8 Noise 126
7.2.9 Speed too high 126
7.2.10 Speed too low 127
7.2.11 Stopping time too long 127
7.2.12 Water in oil sump 127
7.2.13 Liquid flows through bowl
casing drain 128

7.3 Purification faults 129

7.3.1 Unsatisfactory separation
result 129
7.3.2 Outgoing water contaminated by oil 129
7.3.3 Broken water seal 130

7.4 Clarification faults 131

7.4.1 Unsatisfactory separation result 131
7.4.2 Oil discharge through water outlet 131

121
 7 Trouble-tracing

Trouble-tracing

Study the
System Manual’s
Trouble-tracing
chapter first.
(if applicable)

If the problem is not solved

in the System Manual’s
Trouble-tracing, continue
with this chapter.

122
7 Trouble-tracing 7.1 Trouble tracing procedure

7.1 Trouble tracing

procedure
This chapter applies to trouble-tracing concerning
functions of the separator only. It does not include
the other equipment in your processing system.
Always start with trouble-tracing instructions in
the System Manual, and if required, continue with
the instructions below. If the problem still is not
solved, contact your Alfa Laval representative.

7.2 Mechanical function

7.2.1 The separator does not start

Possible cause Action

No power supply to motor. Check power supply.

Bowl lock screws stop rotation. Release lock screws.

7.2.2 Start-up time too long

Possible cause Action

Brake applied. Release brake.

Friction pads worn or oily. Fit new friction pads.

Motor failure. Repair.

Incorrect power supply (50 Hz instead of Use correct power supply. See machine plate.
60 Hz).

Bearings damaged or worn. Install new bearings.

123
7.2 Mechanical function 7 Trouble-tracing

7.2.3 Starting power too low

Possible cause Action

Motor failure. Repair the motor.

Friction pads worn. Fit new friction pads.

Friction pads oily. Fit new friction pads.

7.2.4 Starting power too high

Possible cause Action

Bowl lock screws stop rotation. Release lock screws.

Brake is on. Release brake.

Motor failure. Repair the motor.

Gear worn out. Renew worm wheel and worm.

Bearing damaged or worn. Install new bearings.

Incorrect transmission (50 Hz gear and WARNING: Disintegration hazard

60 Hz power supply).
STOP immediately! Install correct transmission.
Contact your local Alfa Laval representative. The
bowl must be inspected.

Wrong direction of rotation. STOP. Adjust motor power connection.

124
7 Trouble-tracing 7.2 Mechanical function

7.2.5 Separator vibrates

excessively during starting
sequence

NOTE Some vibration is normal during starting sequence when the separator passes through
its critical speeds.

Possible cause Action

Bowl out of balance due to:

poor cleaning

incorrect assembly WARNING: Disintegration hazard

too few discs

insufficiently tightened bowl hood STOP immediately! Identify and rectify cause.

bowl assembled with parts from other

separators.

Vibration dampers in frame feet worn out. Fit new vibration dampers.

Bowl spindle bent (max. 0,15 mm). Fit a new bowl spindle.

Top and/or bottom bearing damaged or Fit new bearings.

worn.

Top bearing springs defective. Fit new springs.

7.2.6 Separator vibrates

excessively during normal
running

Possible cause Action

Uneven sludge deposits in sludge space. STOP and clean bowl.

Bearings damaged or worn. Fit new bearings.

Vibration-damping rubber washers worn Fit new frame feet washers every four years.
out.

Spindle top bearing spring(s) broken. Renew all springs.

125
7.2 Mechanical function 7 Trouble-tracing

7.2.7 Smell

Possible cause Action

Normal occurrence during start as the None.

(new) friction blocks slip.

Brake is applied. Release the brake.

Top and/or bottom bearing overheated. Fit new bearings.

7.2.8 Noise

Possible cause Action

Oil level in oil sump is too low. STOP and read oil level and add oil.

Top and/or bottom bearing damaged or Fit new bearings.

worn.

Friction pads worn. Fit new friction pads.

7.2.9 Speed too high

Possible cause Action

Incorrect transmission (50 Hz gear WARNING: Disintegration hazard

running on 60 Hz power supply).
STOP immediately! Install correct transmission.
Contact your local Alfa Laval representative. The
bowl must be inspected.

Frequency of power supply too high. Check.

126
7 Trouble-tracing 7.2 Mechanical function

7.2.10 Speed too low

Possible cause Action

Brake is on. Release the brake.

Friction pads worn or oily. Fit new friction pads or clean the old ones if they are
oily.

Motor failure. Repair the motor.

Top/bottom bearings damaged or worn. Fit new bearings.

Bearing overheated/damaged. Fit new bearings.

Incorrect transmission (60 Hz gear Make sure that the gear is intended for 50 Hz power
running on 50 Hz power supply ). supply.

7.2.11 Stopping time too long

Possible cause Action

Brake lining worn or oily. Fit new brake lining or clean the old one if it is oily.

7.2.12 Water in oil sump

Possible cause Action

Bowl casing drain obstructed. Clean. Change oil.

Leakage at top bearing. Fit a new seal ring and change oil.

Condensation. Clean the oil sump. Change oil.

127
7.2 Mechanical function 7 Trouble-tracing

7.2.13 Liquid flows through bowl

casing drain

Possible cause Action

Broken water seal. Stop feed and feed water to create water seal.

Too high throughput Reduce the feed.

The supply of displacement/sealing water Straighten the hose or clean the strainer. Make sure
is not sufficient due to clogged strainer, the water pressure is 200-600 kPa (2-6 bar).
kinked hose or low water pressure.

Seal ring on gravity/clarifier disc Fit a new seal ring.

defective.

Bowl hood seal ring defective. Fit a new seal ring.

Bowl speed too low. Make sure current is on and brake is off. Inspect
motor and power transmission.

128
7 Trouble-tracing 7.3 Purification faults

7.3 Purification faults

7.3.1 Unsatisfactory separation

result

Possible cause Action

Gravity disc hole too small. Use a gravity disc with a larger hole.

Incorrect separating temperature. Adjust temperature.

Throughput too high. Reduce throughput.

Sludge space in bowl is filled. Empty the sludge basket in the bowl.

Disc stack clogged. Clean the bowl discs.

Bowl speed too low. See ‘‘7.2.10 Speed too low” on page 127.

7.3.2 Outgoing water

contaminated by oil

Possible cause Action

Gravity disc hole too large. Use a gravity disc with a smaller hole.

Seal ring under the gravity disc defective. Fit a new seal ring.

129
7.3 Purification faults 7 Trouble-tracing

7.3.3 Broken water seal

Possible cause Action

Gravity disc too large. Use a gravity disc with a smaller hole.

Separation temperature too low. Increase temperature.

Throughput too high. Reduce throughput.

Sealing water volume too small. Supply more water.

Seal ring under gravity disc defective. Fit a new seal ring.

Disc stack clogged. Clean the bowl discs.

Bowl speed too low. Use correct speed. See ‘‘7.2.10 Speed too low” on
page 127.

Bowl incorrectly assembled. Examine and make correct.

130
7 Trouble-tracing 7.4 Clarification faults

7.4 Clarification faults

7.4.1 Unsatisfactory separation

result

Possible cause Action

Separating temperature too low. Adjust.

Throughput too high. Reduce throughput.

Feed oil contains water. Re-assemble and operate the separator as a purifier.

Disc stack clogged. Clean the bowl discs.

Sludge space in bowl filled. Empty the sludge basket.

Bowl speed too low. See ‘‘7.2.10 Speed too low” on page 127.

7.4.2 Oil discharge through water

outlet

Possible cause Action

Valve(s) in outlet line closed. Open the valve(s) and adjust to normal back
pressure.

Disc stack clogged. Clean the bowl discs.

Seal ring under gravity disc is defective. Fit a new seal ring.

Bowl incorrectly assembled. Examine and make correct.

131
7.4 Clarification faults 7 Trouble-tracing

132
8 Technical reference

Contents

8.1 Product description 135

8.1.1 Declaration 136

8.2 Technical data 138

8.2.1 Selection of gravity disc with the
nomograph 139

8.3 Basic size drawing, separator without

pump 141

8.4 Basic size drawing, separator with

pump and no heater 142

8.5 Basic size drawing, separator with

pump and heater 143

8.6 Connection list, 

(with pump and no heater / without
pump) 144

8.7 Connection list,

(pump and heater) 145

8.8 Interface description 146

8.8.1 Definitions 146
8.8.2 Component description and signal
processing 147
8.8.3 Function graph and running 
limitations 148

8.9 Lubricants 149

8.9.1 Lubrication chart 149
8.9.2 Lubricants 150
8.9.3 Recommended oil brands 154
8.9.4 Recommended oil brands 155

133
 8 Technical reference

8.9.5 Recommended oil brands 156

8.9.6 Recommended lubricating oils 158

8.10 Drawings 159

8.10.1 Cross-section, complete separator 159
8.10.2 Cross-section, horizontal driving 
device 160
8.10.3 Cross-section, purifier bowl 161
8.10.4 Cross-section, clarifier bowl 162
8.10.5 Cross-section, pump 163
8.10.6 Cross-section, water inlet device 165
8.10.7 Machine plates and safety labels 166

8.11 Electric motor 168

8.12 Storage and installation 169

8.12.1 Storage and transport of goods 169
8.12.2 Planning and installation 172
8.12.3 Foundations 175

134
8 Technical reference 8.1 Product description

8.1 Product description

Alfa Laval ref. 9024666, rev. 1

Product number 881241-08-17

Separator type MAB 104B-14/24
Application Mineral oil
Technical Design: Solid-wall separator bowl available as:
 Purifier with all parts of stainless steel.
 Purifier/clarifier with parts of brass/stainless steel.
Frame with collecting cover of aluminium.
Sealings available in Nitrile.
Intended for marine- and land applications.
Restrictions: Feed temperature: 0 to +100 °C
Ambient temperature: +5 to +55 °C
Not to be used for liquids with flash point below 60 °C.
Risk for corrosion and erosion has to be investigated in each
case by the application centre.

135
8.1 Product description 8 Technical reference

8.1.1 Declaration
Alfa Laval ref. 9033858, rev. 0

This declaration is issued under the sole

responsibility of the manufacturer.

Manufacturer:................................................................................................................................................................

Manufacturer address:..................................................................................................................................................

Separator type:.............................................................................................................................................................

Product specification:...................................................................................................................................................

Configuration number:..................................................................................................................................................

Serial number:..............................................................................................................................................................

Declaration of Incorporation of Partly Completed Machinery

The machinery complies with the relevant, essential health and safety requirements of:
Designation Description
2006/42/EC Machinery Directive

The following essential requirements of 2006/42/EC are applied and fulfilled:

1.1.3, 1.1.4, 1.1.5, 1.1.6, 1.1.7, 1.2.6, 1,2.1, 1.2.3, 1.2.4.3, 1.2.5, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.7,
1.3.8, 1.5.1, 1.5.2, 1.5.4, 1.5.5, 1.5.6, 1.5.8, 1.5.11, 1.5.13, 1.5.15, 1.6.1, 1.6.2, 1.6.3, 1.6.4,
1.6.5, 1.7.4.2

To meet the requirements the following standards have been applied:

Designation Description
EN 60204-1 Electrical equipment of machines, part 1: General requirements
EN ISO 12100 Safety of machinery - General principles for design - Risk
assessment and risk reduction
ISO 3744 Acoustics - Determination of sound power levels of noise sources
using sound pressure
EU Declaration of Conformity
The machinery complies with the following Directives:
Designation Description
2004/108/EC  Electromagnetic Compatibility Directive
(to 2016-04-19)
2014/30/EU 
(from 2016-04-20)
To meet the requirements the following standards have been applied:
Designation Description
EN 61000-6-2 Electromagnetic compatibility (EMC) - Part 6-2: Generic standards
- Immunity for industrial environments
EN 61000-6-4 Electromagnetic compatibility (EMC) - Part 6-4: Generic standards
- Emission standard for industrial environments

136
8 Technical reference 8.1 Product description

The technical construction file for the machinery is compiled and retained by the authorized
person Hans Thomasson within the Product Centre for High Speed Separators, Alfa Laval
Tumba AB, SE-14780 Tumba Sweden.

This machinery is to be incorporated into other equipment and must not be put into service until
it has been completed with starting/stopping equipment, control equipment, auxiliary equipment.
e.g. valves, according to the instructions in the technical documentation, and after the completed
machinery has been declared in conformity with the directives mentioned above, in order to fulfil
the EU-requirements.

Signed for and on behalf of: ......................................................................................................

Place: ......................................................................................................
Date of issue: ......................................................................................................

Signature: ......................................................................................................
Name: ......................................................................................................
Function: ......................................................................................................

137
8.2 Technical data 8 Technical reference

8.2 Technical data

Alfa Laval ref. 558168, rev 2

Bowl speed max. 7500 / 7350 rev/min. 50Hz/60Hz

Speed motor shaft max. 1500 / 1800 rev/min. 50Hz/60Hz
Gear ratio 50:10 / 49:12 50Hz/60Hz
Hydraulic capacity 2 m³/h
Max. density of sediment/feed. 1600 / 1100 kg/m³
Feed temperature 0 / 100 min./max. °C
Weight of separator 149 kg (without motor)
Motor power 1,1 / 1,5 kW (without pump/ with pump)
Jp reduced to motor shaft 4,8 kg/m² 50Hz
Jp reduced to motor shaft 3,2 kg/m² 60Hz
Power consumption 0,5 / 1,8 kW (idling/at max. capacity)
Max. power consumption 1,3 kW (at starting up)
Starting time 2/3 minutes (min./ max.)
Stopping time with brake 1,4 / 3 minutes (min./ max.)
Stopping time without brake 9 minutes (average)
Lubricating oil volume 0,8 litres
Max. running time:
empty bowl 480 minutes
filled bowl, without flow 480 minutes
Sound power/sound press. level 9,3 / 78 Bel(A) /dB(A)
Vibration level max. 9 mm/sec (new sep./sep. in use)
Bowl max. inner diameter 214 mm
Bowl volume 2,5 litres
Bowl weight 25 kg
Bowl body material AL 111 2377-02
There are other materials than stainless steel in contact with process liquid.

138
8 Technical reference 8.2 Technical data

8.2.1 Selection of gravity disc

with the nomograph

The best separating results are obtained by using a gravity disc with large hole as
possible, one which will not cause a broken water seal in the bowl or an
emulsification in the water outlet.
The presence of salt water may demand the use of gravity disc with bigger hole
than indicated in the nomograph (the nomograph is based on the density
properties of fresh water).

Table for obtaining the gravity disc

If the light-liquid specific weight at 15°C (60°F) is known and the heavy liquid is
water, the obtain diameter with gravity-disc should first be used from table one (I).
If separating temperature is 55° C (130° C) or from table two (II), separating
temperature is between 80°-100°C (175°-212°F). The hole diameter is inscribed
in millimetre (mm) on every disc.

Table I Table II hole diameter

mm
0,999 - 0,991 1,002 - 0,994 57, 5
0,991 - 0,980 0,994 - 0,982 60
0,980 - 0, 963 0,982 - 0,966 63
0,963 - 0,938 0,966 - 0,942 68
0,938 - 0,901 0,942 - 0,906 73, 5
0,901 - 0,843 0,906 - 0,849 83
0,843 - 0,849 93, 5

Nomograph for obtaining gravity disc

If the light-phase specific weight is known at a temperature between 15°C -70°C
(60°F - 158°F) and the heavy phase is water, then the diameter for the disc is
obtained by first testing with the separating temperature up to 100°C (121°F) from
the given nomograph.

Example in the nomograph I II

Designation in the graph

The light phase specific weight 0, 96 at 15°C (60°F) 0, 87 at 25°C (75°F)

Separating temperature 70°C (160°F) 60°C (140°F)

Hole diameter. 68 mm 83 mm

139
8.2 Technical data 8 Technical reference

Gravity disc nomograph

Y Ø
1,00

I
I I

57,5
0,95
60

63

68
0,90

73,5
II
I I

0,85

83

0,80

93,5

0,75

15 20 30 40 50 60 70 80 - 100 C
O
G0611951

50 60 70 80 90 100 110 120 130 140 150 160 170 180-- 210 F
O

X = Separating temperature in °C and °F

Y = The light phase specific weight
ø = Gravity disc hole diameter mm

140
8 Technical reference 8.3 Basic size drawing, separator without pump

8.3 Basic size drawing,

separator without
pump
Alfa Laval ref. 9024668, rev. 0

G0625891

A. Screw 1/2-13UNC Vertical force not exceeding

B. Tightening torque 16 Nm, locked with lock nut 8 kN/foot

Data for connections see ‘‘8.6 Connection list, (with pump

and no heater / without pump)” on page 144. Horizontal force not
All connections to be installed non-loaded and flexible. exceeding 8 kN/foot

141
8.4 Basic size drawing, separator with pump and no heater 8 Technical reference

8.4 Basic size drawing,

separator with pump
and no heater
Alfa Laval ref. 9024670, rev. 0

G0625741

A. R 3/4", BSP 3/4 Vertical force not exceeding

B. R 1 1/4", BSP 1 1/4 8 kN/foot
C, D. R 1", BSP 1
E. 1/2-13 UNC
F. View Horizontal force not
exceeding 8 kN/foot
Data for connections see ‘‘8.6 Connection list, (with pump
and no heater / without pump)” on page 144.
All connections to be installed non-loaded and flexible.

142
8 Technical reference 8.5 Basic size drawing, separator with pump and heater

8.5 Basic size drawing,

separator with pump
and heater
Alfa Laval ref. 9024669, rev. 0

G0625751

A. Screw 1/2-13UNC Vertical force not exceeding

B. Tightening torque 16 Nm, locked with lock nut 8 kN/foot

Data for connections see ‘‘8.7 Connection list, (pump and

heater)” on page 145. Horizontal force not
exceeding 8 kN/foot
All connections to be installed non-loaded and flexible.

143
8.6 Connection list, (with pump and no heater / without pump) 8 Technical reference

8.6 Connection list, 

(with pump and no
heater / without
pump)
Alfa Laval ref. 9024671, rev. 0

Connection No. Description Requirements/limit

201 Inlet for process liquid 

- Allowed temperatures Min. 0 °C, max. 100 °C

206 Inlet for water seal Fresh water, approx. 

2,5 litres (depending on
gravity disc)

220 Outlet for light phase (oil from pump)

221 Outlet for heavy phase (water) No counterpressure

460 Drain of frame

701 Motor for separator 

- Max. deviation from nominal frequency ±5%

144
8 Technical reference 8.7 Connection list, (pump and heater)

8.7 Connection list,

(pump and heater)
Alfa Laval ref. 9024672, rev 0

Connection No. Description Requirements/limit

201.1 Inlet for process liquid, (to pump) 

- Allowed temperatures Min. 0 °C, max. 100 °C

201.2 Outlet for process liquid, (from pump to heater)

201.3 Inlet for process liquid, (from heater to separator)

206 Inlet for water seal Fresh water, approx. 

2.5 litres (depending on
gravity disc)

220 Outlet for light phase (oil from pump) No counterpressure

221 Outlet for heavy phase (water) No counterpressure

460 Drain of frame

701 Motor for separator 

- Max. deviation from nominal frequency ±5%

145
8.8 Interface description 8 Technical reference

8.8 Interface description

Alfa Laval ref. 9024640, rev 0

In addition to the Connection List this document

describes limitations and conditions for safe
control, monitoring and reliable operation.
At the end of the document a function graph and
running limitations are to be found.

8.8.1 Definitions

Standstill means:
 The machine is assembled correctly.
 All connections are installed according to
Connection List, Interconnection Diagram
and Interface Description.

Start means:
 The power to the separator is on.
 The acceleration is supervised to ensure that
a certain speed has been reached within a
certain time. See ‘‘8.2 Technical data” on
page 138.

Normal stop means:

 Stopping of the machine at any time with feed
or safety/backup liquid and with brake
applied.

146
8 Technical reference 8.8 Interface description

Safety stop means:

The machine must be stopped in the quickest and
safest way due to vibrations or process reasons.
Comply with following conditions:
 The bowl must be kept filled.
 The machine must not be restarted before the
reason for the Safety stop has been
investigated and action has been taken.
In case of emergency condition in the plant, the
machine must be stopped in a way that is
described in EN 418.

8.8.2 Component description and

signal processing
Electrical connections
Separator motor 701
The separator is equipped with a 3-phase DOL-
started (direct on line) motor. The separator can
also be started by a Y/D starter, but then the time
in Y-position must be maximised to 5 seconds.

147
8.8 Interface description 8 Technical reference

8.8.3 Function graph and running

limitations

G0543211

A. Stand still
B. Starting mode
C. Running mode
D. Stop mode
E. Safety stop mode

148
8 Technical reference 8.9 Lubricants

8.9 Lubricants

8.9.1 Lubrication chart

Alfa Laval ref. 553216-01 rev. 9

CAUTION

Check the oil level before start.

Top up when necessary.
Do not overfill.

Lubricating points Lubrication Interval

The oil bath Lubricate with oil.  For information on oil change
Bowl spindle bearings are For information on type interval see Recommended
lubricated by oil splash from of lubricant see lubricating oils.
the oil bath. Recommended
lubricating oils.
For information on
lubricating oil volume:
see Technical data
Bowl spindle taper Lubricate with oil. At assembly.
Only a few drops for rust
protection.
Bowl Lubricate with paste. At assembly.
Sliding contact surfaces, For information on pastes
thread of lock nut and cap nut. see Recommended oil
brands.
Rubber seal rings Lubricate with grease. At assembly.
For information on
grease see
Recommended
lubricating oils
Friction coupling ball The bearings are sealed -
bearings. and packed with grease
Not valid for rigid coupling: and need no extra
lubrication.
Electric motor Follow manufacturer’s Follow manufacturer’s instructions.
instructions.
Threads Lubricating oil, if not At assembly.
otherwise stated.

NOTE!
If not otherwise specified, follow the supplier’s
instructions about applying, handling and
storing of lubricants.

149
8.9 Lubricants 8 Technical reference

8.9.2 Lubricants
Alfa Laval ref. 55 3217-01, rev. 14

Lubricant recommendation for hygienic and

non-hygienic applications
Lubricants with an Alfa Laval part number are
approved and recommended for use.
The data in the tables below is based on supplier
information.
Trade names and designations might vary from
country to country. Please contact your local
supplier for more information.

Paste for assembly of metallic parts, non-

hygienic applications:

Part No Quantity Designation Manufacturer Remark

537086-02 1000 g Molykote 1000 Paste Dow Corning -

537086-03 100 g Molykote G-n plus Paste Dow Corning -

537086-06 50 g

537086-04 50 g Molykote G-rapid plus Paste Dow Corning -

- - Gleitmo 705 Fuchs Lubritech -

- - Wolfracoat C Paste Klüber -

- - Dry Moly Paste Rocol -

- - MTLM Rocol -

Bonded coating for assembly of metallic

parts, non-hygienic applications:

Part No Quantity Designation Manufacturer Remark

535586-01 375 g Molykote D321R Spray Dow Corning -

- - Gleitmo 900 Fuchs Lubritech Varnish or spray

150
8 Technical reference 8.9 Lubricants

Paste for assembly of metallic parts, hygienic

applications (NSF registered H1 is preferred):

Part No Quantity Designation Manufacturer Remark

- - Molykote D Paste Dow Corning -

537086-07 50 g Molykote P-1900 Dow Corning NSF Registered H1 

(7 Jan 2004)

- - Molykote TP 42 Dow Corning -

561764-01 50 g Geralyn 2 Fuchs Lubritech NSF Registered H1 

(3 sep 2004)

- - Geralyn F.L.A Fuchs Lubritech NSF Registered H1 

(2 Apr 2007)
German §5 Absatz 1
LMBG approved

554336-01 55 g Gleitmo 1809 Fuchs Lubritech -

- - Gleitmo 805 Fuchs Lubritech DVGW (KTW) approval

for drinking water 
(TZW prüfzeugnis)

- - Klüberpaste 46  Klüber White; contains no

MR 401 lead, cadmium, nickel,
sulphur nor halogens.

- - Klüberpaste UH1 Klüber NSF Registered H1 

84-201 (26 Aug 2005)

- - Klüberpaste UH1 Klüber NSF Registered H1 

96-402 (25 Feb 2004)

- - 252 OKS NSF Registered H1 

(23 July 2004)

- - Foodlube Multi Rocol NSF Registered H1 

Paste (13 Apr 2001)

151
8.9 Lubricants 8 Technical reference

Silicone grease/oil for rubber rings, hygienic

and non-hygienic applications

Part No Quantity Designation Manufacturer Remark

- - No-Tox Food Grade Bel-Ray NSF Registered H1 

Silicone grease (16 December 2011)

- - Dow Corning 360 Dow Corning Tested according to

Medical Fluid and complies with all
National Formulary
(NF) requirements for
Dimethicone and
European
Pharmacopeia (EP)
requirements for
Dimeticone or Silicone
Oil Used as a
Lubricant, depending
on viscosity.

569415-01 50 g Molykote G 5032 Dow Corning NSF Registered H1 

(3 June 2005)

- - Geralyn SG MD 2 Fuchs Lubritech NSF Registered H1 

(30 March 2007)

- - Chemplex 750 Fuchs Lubritech DVGW approved

according to the
German KTW-
recommendations for
drinking water.

- - Paraliq GTE 703 Klüber NSF Registered H1 

(25 Feb 2004).
Approved according to
WRAS.

- - Unisilkon L 250 L Klüber Complies with German

Environmental Agency
on hygiene
requirements for tap
water. Certified by
DVGW-KTW, WRAS,
AS4020, ACS.

- - ALCO 220 MMCC NSF Registered H1 

(25 March 2002)

- - Foodlube Hi-Temp Rocol NSF Registered H1 

(18 April 2001)

152
8 Technical reference 8.9 Lubricants

Always follow the lubrication recommendations of

the bearing manufacturer.

Grease for ball and roller bearings in electric

motors

Part No Quantity Designation Manufacturer Remark

- - Energrease LS2 BP -

- - Energrease LS-EP2 BP -

- - Energrease MP-MG2 BP -

- - APS 2 Castrol -

- - Spheerol EPL 2 Castrol -

- - Multifak EP2 Chevron -

- - Multifak AFB 2 Chevron -

- - Molykote G-0101 Dow Corning -

- - Molykote Multilub Dow Corning -

- - Unirex N2 ExxonMobil -

- - Mobilith SHC 460 ExxonMobil -

- - Mobilux EP2 ExxonMobil -

- - Lagermeister EP2 Fuchs Lubritech -

- - Rembrandt EP2 Q8/Kuwait -

Petroleum

- - Alvania EP 2 Shell -

- - LGEP 2 SKF -

- - LGMT 2 SKF -

- - LGFP 2 SKF NSF Registered H1 

(17 Aug 2007)

- - Multis EP2 Total -

153
8.9 Lubricants 8 Technical reference

8.9.3 Recommended oil brands

Alfa Laval ref. 553218-01, rev. 6

Mineral lubricating oil CKC 220 (Alfa Laval oil

group A)
Trade names and designations might vary from
country to country, Please contact your local
supplier for more information.
Recommended oil brands

Manufacturer Designation
BP Castrol Ultra 220
Castrol Alpha SP 320
Chevron Clarity Machine oil 220
Rando HD 220
Paper Machine oil 220
ExxonMobil Mobil DTE oil BB
Q8/Kuwait Petroleum Wagner 220
Shell Morlina S2 B 220
Statoil/Fuchs LubeWay XA 220
Total Cirkan ZS 220

Requirements
 Viscosity grade (ISO 3448/3104) VG 220 /
Viscosity index (ISO 2909) VI > 90. 
The oil must have the correct viscosity grade.
No other viscosity grade than specified
should be used.
 The oil must be endorsed for worm gear with
bronze worm wheel.
 The oil must follow the requirements in one of
the standards below.

Standard Designation
ISO 12925-1 ISO-L-CKC to CKT 220
DIN 51517 part 3 (German standard) DIN 51517 – CLP 220
DIN 51524 part 2 (German standard) DIN 51524 – HLP 220
DIN 51524 part 3 (German standard) DIN 51524 – HVLP 220

NOTE
The use of other lubricants than the
recommended is done on the exclusive
responsibility of the user or oil supplier.

154
8 Technical reference 8.9 Lubricants

8.9.4 Recommended oil brands

Alfa Laval ref. 553218-02, rev. 7

Mineral lubricating oil CKE 220 (Alfa Laval oil

group B)
Trade names and designations might vary from
country to country, Please contact your local
supplier for more information.
Recommended oil brands
Manufacturer Designation
Bel-Ray 100 Gear Oil Extreme Pressure 220
BP Castrol Alpha SP 220
Castrol Optigear BM 220
Chevron Clarity Machine Oil 220
Meropa Ultra Gear 220
Meropa 220
ExxonMobil Spartan EP 220
Mobilgear 600 XP 220
Q8/Kuwait Petroleum Goya 220
Shell Omala S2 G 220
Statoil/Fuchs LoadWay EP 220
Total Carter EP 220
Lubmarine Epona Z 220

Requirements
 Viscosity grade (ISO 3448/3104) VG 220 /
Viscosity index (ISO 2909) VI > 90. 
The oil must have the correct viscosity grade.
No other viscosity grade than specified
should be used.
 The oil must be endorsed for worm gear with
bronze worm wheel.
The oil must follow the requirements in one of the
standards below.

Standard Designation
ISO 12925-1, (ISO 6743/6) ISO-L-CKC/CKD/CKE/CKT 220
DIN 51517 part 3 DIN 51517 - CLP 220

NOTE
The use of other lubricants than the
recommended is done on the exclusive
responsibility of the user or oil supplier.

155
8.9 Lubricants 8 Technical reference

8.9.5 Recommended oil brands

Alfa Laval ref. 553218-03, rev. 8

Synthetic lubricating oil PAO CKE 220 (Alfa

Laval oil group D)
Trade names and designations might vary from
country to country, Please contact your local
supplier for more information.
Recommended oil brands (general demands)

Manufacturer Designation
BP Castrol Alphasyn HTX 220
Castrol Alphasyn EP 220
Castrol Alphasyn HG 220
Castrol Optigear Synthetic A 220
Chevron Pinnacle EP 220
Meropa Synthetic EP 220 (H2)
ExxonMobil Mobil SHC 630
Q8/Kuwait Petroleum Schumann 220
Shell Morlina S4 B 220
Statoil/Fuchs Mereta 220
Total Carter SH 220
Lubmarine Epona SA 220

Recommended oil brands (special hygienic

demands)
Conform to U.S. Food and Drug Administration
(FDA) requirements of lubricants with incidental
food contact, Title CFR 21 178.3570, 178.3620
and/or those generally regarded as safe (US 21
CFR 182).
The hygienic oil on the list is in the online “NSF
White Book™ Listing” at the time of the revision of
this document. For more information about the
NSF registration and up to date H1 registration,
see www.nsf.org (http://www.nsf.org/business/
nonfood_compounds/)
Manufacturer Designation
Fuchs Cassida Fluids GL 220

156
8 Technical reference 8.9 Lubricants

Requirements

Standard Designation
ISO 12925-1, (ISO 6743/6) ISO-L-CKC/CKD/CKE/CKT 220
DIN 51517 part 3 DIN 51517 - CLP 220

NOTE
The use of other lubricants than the
recommended is done on the exclusive
responsibility of the user or oil supplier.

157
8.9 Lubricants 8 Technical reference

8.9.6 Recommended lubricating

oils
Alfa Laval ref. 553219-10, rev. 2

Selection of lubricating oil

Select lubricating oil type with regards to ambient
temperature.

Ambient temperature °C Oil type Oil change interval

(operating hours)

Between +5 - +45 and 553218 01 – Mineral lubricating oil 1500 h

frame temperature below CKC 220 (Alfa Laval oil group A)
80oC or
553218 02 – Mineral lubricating oil
CKE 220 (Alfa Laval oil group B)

+2 - +65 553218 03 – Synthetic lubricating 2000 h

oil PAO CKE 220 (Alfa Laval oil
group D)

Oil change interval

Oil change interval is dependent on operating
conditions.

Operating conditions Oil change interval

In a new installation.  200 hours
After change of gear transmission.
Continuous operation. See Selection of lubricating oil
When the separator is operated for 12 months
short periods.
Seasonal operation Before every operating period

Other information
Check and prelubricate spindle bearings on
separators which have been out of service for 6
months or longer.

158
8 Technical reference 8.10 Drawings

8.10 Drawings

8.10.1 Cross-section, complete

separator

C01436A1

Complete separator

159
8.10 Drawings 8 Technical reference

8.10.2 Cross-section, horizontal

driving device

G0615111

Horizontal driving device

160
8 Technical reference 8.10 Drawings

8.10.3 Cross-section, purifier bowl

G0611211

Purifier bowl

161
8.10 Drawings 8 Technical reference

8.10.4 Cross-section, clarifier bowl

G0611311

Clarifier bowl

162
8 Technical reference 8.10 Drawings

8.10.5 Cross-section, pump

.

G0626111
1. Sealing ring
2. Coupling
3. Retaining ring
4. Sealing ring
5. Pump impeller
6. Pump impeller
7. Shield
8. Slotted tubular spring pin
9. Slotted tubular spring pin

163
8.10 Drawings 8 Technical reference

G0626211
1. Coupling guard

164
8 Technical reference 8.10 Drawings

8.10.6 Cross-section, water inlet

device

G0626311

1. Hose nipple
2. Packing
3. Sight glass
4. Packing

165
8.10 Drawings 8 Technical reference

8.10.7 Machine plates and safety

labels
Alfa Laval ref. 558097, rev. 1

G0626021
1. Machine plate
Separator
Manufacturing serial No / Year
Product No S0061411

Bowl
Max. speed (bowl)
Direction of rotation (bowl)
Speed motor shaft
Frame
El. current frequency
Recommended motor power
Max. density of feed
Max. density of sediment
Process temperature min./max.

166
8 Technical reference 8.10 Drawings

3. Safety label
Text on label:
Warning

S00690N1
Read the instruction manuals before installation,
operation and maintenance. Consider inspection
intervals.
Failure to strictly follow instructions can lead to
fatal injury.
If excessive vibration occurs, stop separator and
keep bowl filled with liquid during rundown.
Out of balance vibration will become worse if bowl
is not full.
Separator must stop rotating before any
dismantling work is started.

4. Name plate

S0063211
6. Power supply frequency

S0063111
7. Arrow
Indicating direction of rotation of horizontal driving
device.
S0068811

9. Stop, follow lifting instruction

This transport label is not permanently fixed to the
separator.
S0069111

167
8.11 Electric motor 8 Technical reference

8.11 Electric motor

For information regarding motor specifications,
see motor plate.
For further information see motor manufacturer's
documentation.

NOTE
For complete information about motor
variants, please contact your Alfa Laval
representative.

168
8 Technical reference 8.12 Storage and installation

8.12 Storage and

installation

8.12.1 Storage and transport of

goods

Storage
Before storing a separator that has been in
operation, make sure to drain any parts
containing water, such as Operating water
module (if any), Operating water system and
Cooling jackets.
Specification
Upon arrival to the store, check all components
and keep them:
1. Well stored and protected from mechanical
damage.
2. Dry and protected from rain and humidity.
3. Organized in the store in such a way that the
goods will be easily accessible when
installation is about to take place.

169
8.12 Storage and installation 8 Technical reference

A separator can be delivered with different types

of protection:
 Fixed on a pallet.
The separator must be stored in a storage
room well protected from mechanical damage
and also dry and protected from rain and
humidity.



G0402021


Fixed on a pallet
 In a wooden box which is not water tight.
The separator must be stored dry and
protected from rain and humidity.






G0402031


 In a wooden box which is not water tight

 In a special water-resistant box for outdoor

storage.
The separator and its parts have been treated
with an anti-corrosion agent. Once the box
has been opened, store dry and protected
from rain and humidity.
The packaging for outdoor storage is only to
special order.
G0402041

In a special water-resistant box for outdoor storage

170
8 Technical reference 8.12 Storage and installation

Transport
Specification
 During transport of the separator, the frame
hood and bowl must always be removed
from the machine.
 When lifting a separator it must always be
hung securely. See chapter ‘‘5.7 Lifting
instructions” on page 85.

WARNING

Crush hazard

Use correct lifting tools and follow lifting

instructions.

 During erection, all inlets and outlets to

separators and accessories must be covered
to be protected from dirt and dust.

171
8.12 Storage and installation 8 Technical reference

8.12.2 Planning and installation

Introduction
The requirements for one or more separators can
be established by consulting the following
documents.
 Basic size drawing
 Connection list

G0020611
 Interface description
 Interconnection drawing Check the drawings when planning the installation

 Foundation drawing
 Lifting drawing
These are included in this chapter ‘‘8 Technical
reference” on page 133.

Important measurements
Important measurements are the minimum lifting
height for lifting tackle, shortest distance between
driving motor and wall, free passage for
dismantling and assembly, maintenance and
operation.
Plan your installation with sufficient room for the

G0020721
controls and operation so that instruments are
easily visible. Valves and controls must be within
convenient reach. Pay attention to space Suitable space must be obtained for the maintenance
requirements for maintenance work, work work
benches, dismantled machine parts or for a
service trolley.

172
8 Technical reference 8.12 Storage and installation

Space for separator

The separator shall be placed in such a way that
suitable space for maintenance and repair is
obtained.

Specification
 See the "Basic size drawings" on pages 141,
142 and 143 for the service space required
with the separator installed.

Recommendation
 The spanner for the large lock ring should
have sufficient space to make a complete turn
without hitting any of the ancillary equipment
surrounding the separator.

173
8.12 Storage and installation 8 Technical reference

Lifting height for transport of bowl

Specification
 A minimum height is required to lift the bowl,
bowl parts and the bowl spindle.
Recommendation
 When two or more separators are installed,
the lifting height may have to be increased to
enable parts from one separator to be lifted
and moved over an adjoining assembled
separator.

NOTE
Remove the separator bowl before lifting.

WARNING

Crush hazard

G0625911
Use correct lifting tools and follow lifting
Do not lift the separator in any other way
instructions.
Do not work under a hanging load.

Space for oil changing

Specification
 The plug for gearbox oil draining must not be
blocked by floor plate arrangement, etc.
Recommendation
 It should be possible to place a portable
collecting tray under the gearbox drain plug
for changing oil.
G0602621

Place the separator in such way that makes the oil

change easy

174
8 Technical reference 8.12 Storage and installation

8.12.3 Foundations
Specification
 The separator should be installed at floor
level, see the "Basic size drawings" on page
143, 142 and 141.
 The separator must be installed on a strong
and rigid foundation to reduce the influence of
vibrations from adjacent machinery.

Fit the separator frame on the foundation as

follows:
1. Place the separator without vibration
dampers (3) in position.
2. Check that the bolts do not press against the
edges of the holes, otherwise the elasticity of
the mounting of the separator frame will be
impeded.

G0920511
3. Check that the separator frame is horizontal
and that all feet rest on the base plane. Frame foot with vibration damper
4. Fit height adjusting washers required. 1. Lock nut
5. Lift the separator, fit the vibration dampers 2. Nut
3. Vibration damper
(3), lower and check that the bolts do not
press against the edges of the holes.
6. Fit the nut (2) and tighten with 16 Nm. Hold
the nut firmly and secure with the lock nut (1).
Repeat for the other frame feet.

175