SKF FD3 User manual

FD3 Lubrication Pump Unit
for dual-line centralized grease lubrication systems
EN
Assembly instructions acc. to EC Dir. 2006/42/EC
for partly completed machinery with associated operating instructions

Page 2
EN
Masthead
These original assembly instructions with
associated operating instructions pursuant
to EC Machinery Directive 2006/42/EC are
an integral part of the described product and
must be kept for future use.
These original assembly instructions with as-
sociated operating instructions were compiled
in accordance with the established standards
and rules for technical documentation,
VDI 4500 and EN 292.
© SKF Lubrication Systems Germany AG
This documentation is protected by copy-
right. SKF Lubrication Systems Germany AG
reserves all rights, including those to the
photomechanical reproduction, duplication,
and distribution by means of special proce-
dures (e.g., data processing, data media, and
data networks) of this documentation in whole
or in part.
Subject to changes in contents and technical
information.
Service
If you have technical questions, please contact
the following offices:
SKF Lubrication Systems Germany AG
Berlin Plant
Motzener Strasse 35/37
12277 Berlin
Germany
Tel. [phone]
Fax [phone]
Hockenheim Plant
2. Industriestrasse 4
68766 Hockenheim
Germany
Tel. [phone]
Fax [phone]
[e-mail]
www.skf.com/lubrication
FD3 Lubrication Pump Unit

Page 3 EN
4.3 Checking the delivery and return lines
and connecting the filler line 16
4.4 Filling via a drum pump 16
4.5 Electrical motor connection 17
4.6 Electrical connection of
FD3 lubricant pump 18
4.7 Electrical connection of
ultrasonic sensor 18
4.8 Lubrication line connection 19
4.8.1 Lubrication line arrangement 19
4.9 Note on the nameplate 21
Operating manual
1. Safety instructions 24
2. Lubricants 24
3. Transport, delivery, and storage 25
3.1 Lubrication units 25
3.2 Electronic and electrical devices 25
3.3 General notes 25
4. Assembly 26
4.1 Information on assembly 26
4.2 Assembly of the FD3 lubrication
pump unit 26
4.3 Dismantling and disposal 26
5. Design and function 27
Function of the lubrication pump unit 27
5.1 Function of fill level monitoring
U2 ultrasonic sensor with
2 switching points 28
6. Commissioning 30
6.1 Requirements for commissioning 30
6.2 Venting 30
6.3 Configuration of ultrasonic sensor 32
7. Shutdown 33
7.1 Temporary shutdown 33
7.2 Permanent shutdown 33
8. Maintenance 34
8.1 General information 34
8.2 Cleaning the grease filter 35
8.3 Oil level check 35
8.4 Venting the lubrication pump-
unit with empty reservoir 36
9. Malfunctions 37
9.1 Commissioning malfunctions 38
9.2. Malfunctions on U2 ultrasonic sensor 39
10. Wearing parts and spare parts 40
10.1 Spare parts for
FD3 lubrication pump unit 40
Table of contents
Assembly instructions
Explanation of safety and informational
symbols and safety signal words 5
1. Safety instructions 6
1.1 Intended use 6
1.2 Authorized personnel 7
1.3 Electric shock hazard 7
1.4 System pressure hazard 7
2. Lubricants 8
2.1 General information 8
2.2 Selection of lubricants 8
2.3 Approved lubricants 9
2.4 Lubricants and the environment 10
2.5 Lubricant hazards 10
3. Overview 11
4. Assembly 12
4.1 Information on assembly 12
4.2 Assembly of the
FD3 lubrication pump unit 13
4.2 Setup and attachment 13
4.2.1 Assembly 13
4.2.2 Mounting dimensions 14
4.2.3 Technical data 15

Page 4
EN
The product:
lubrication pump unit
of the series: FD3
is hereby confirmed to comply with the es-
sential protection requirements stipulated by
the following Directive(s) of the Council on the
approximation of laws of the Member States:
Machinery Directive 2006/42/EC
Low Voltage Devices 2006/95/EC
Electromagnetic Compatibility
2004/108/EC.
Notes:
(a) This declaration certifies compliance with
the aforementioned Directives, but does
not constitute a guarantee of characteris-
tics.
(b) The safety instructions in the documenta-
tion enclosed with the product must be
observed.
(c) The commissioning of the products here
certified is prohibited until the machine,
vehicle or similar in which the product is
installed conforms with the provisions and
requirements of the applicable Directives.
(d) The operation of the products at non-stan-
Information concerning EC Declaration of Conformity and EC Declaration of Incorporation
dard supply voltage, as well as non-ad-
herence to the installation instructions, can
negatively impact the EMC characteristics
and electrical safety.
We further declare:
The aforementioned product is, according to
EC Machinery Directive 2006/42/EC,
Annex II Part B, designed for installation
in machinery / for incorporation with other
machinery to form a machine.
Within the scope of the EC Directive, com-
missioning shall be prohibited until the
machinery in which this product is installed
conforms with the provisions of this Direc-
tive.
The aforementioned product may, with
reference to EC Directive 97/23/EC con-
cerning pressure equipment, only be used
in accordance with its intended use and in
conformity with the instructions provided in
the documentation. The following must be
observed in this regard:
The product is neither designed nor approved
for use in conjunction with fluids of Group 1
(Dangerous Fluids) as defined in Article 2, Para.
2 of Directive 67/548/EEC of June 27, 1967.
The product is neither designed nor approved
for use in conjunction with gases, liquefied
gases, pressurized gases in solution, vapors
or such fluids whose vapor pressure exceeds
normal atmospheric pressure (1013 mbar) by
more than 0.5 bar at their maximum permis-
sible temperature.
When used in conformity with their intended
use, the products supplied by SKF Lubrication
Systems Germany AG do not reach the limit
values listed in Article 3, Para. 1, Clauses 1.1
to 1.3 and Para. 2 of Directive 97/23/EC. They
are therefore not subject to the requirements
of Annex 1 of the Directive. Consequently,
they do not bear a CE marking in respect of
Directive 97/23/EC. SKF Lubrication Systems
classifies them according to Article 3, Para. 3
of the Directive.
The Declaration of Conformity and Incorpora-
tion forms part of the product documentation
and is supplied together with the product.

Page 5 EN
Explanation of symbols and safety words
Informational symbolsSafety signal words and their meaningHazard symbols
Explanation of safety and informational symbols and safety signal words
You will find these symbols, which warn of
specific dangers to persons, material assets, or
the environment, next to all safety instructions
in these operating instructions.
Please heed these instructions and proceed
with special care in such cases. Please forward
all safety instructions to other users.
General hazard
DIN 4844-2-W000
Electrical voltage/current
Hot surface
Signal word Meaning
Danger! Risk of serious injury or
death
Warning! Risk of bodily injury and
damage to property and the
environment
Note! Provides additional
information
Note
Prompts an action
Used for itemizing
Refers to other facts,
causes or consequences
Provides additional information
Instructions placed directly on the machines/
lubrication pump units, such as:
Arrow indicators
Labels for fluid connections
must be followed and kept in fully legible
condition.
You are responsible!
Please read the assembly and operating
instructions thoroughly and follow the safety
instructions.
Danger of being drawn into machinery
DIN 4844-2-W008
DIN 4844-2-W026
BGV 8A
Slipping hazard
DIN 4844-2-W028
Warning of potentially explosive
atmosphere
DIN 4844-2-W021

Page 6
EN
Assembly instructions ac-
cording to
Machinery Directive
2006/42/EC, Annex VI
The assembly instructions fulfill the afore-
mentioned Machinery Directive with regard to
“partly completed machinery.” Partly com-
pleted machinery, which includes the product
described herein, is only intended to be incor-
porated into or assembled with other ma-
chinery or other partly completed machinery
or equipment, thereby forming machinery to
which the above-mentioned Directive applies.
The operator of the described product
must ensure that the assembly instruc-
tions are read and understood by all
persons tasked with the assembly,
operation, maintenance, and repair of
the product. The assembly instructions
must be kept readily available.
Note that the assembly instructions
form part of the product and must
accompany the product if sold to a new
owner.
1. Safety instructions
In addition to the assembly instructions,
statutory regulations and other general
regulations for accident prevention
and environmental protection must be
observed and applied.
The described product is manufactured in
accordance with the generally accepted rules
and standards of industry practice and with
occupational safety and accident prevention
regulations. Risks may, however, arise from
its usage and may result in physical harm to
persons or damage to other material assets.
Therefore the product may only be used in
proper technical condition and in observance
of the assembly instructions. In particular, any
malfunctions which may affect safety must be
remedied immediately.
1.1 Intended use
The lubrication pump unit of the FD3 series
is a high-performance axial piston pump that
produces a maximum continuous operating
pressure of 400 bar.
It is chiefly used to supply dual-line centralized
grease lubrication systems.
The FD3 lubrication pump unit can feed all
greases up to NLGI Grade 3 with a worked
penetration > 2001/10 mm and oils classified
under ISO VG that have an operating viscosity
> 50 mm2/s.
The use of synthetic oils requires prior
approval from SKF.
Any other usage is deemed non-compliant
with the intended use and could result in
damage, malfunction, or even injury.

Page 7 EN
1.2 Authorized personnel
Only qualified technical personnel may install,
operate, maintain, and repair the products
described in the assembly instructions. Quali-
fied technical personnel are persons who have
been trained, assigned and instructed by the
operator of the final product into which the
described product is incorporated. Such per-
sons are familiar with the relevant standards,
rules, accident prevention regulations, and as-
sembly conditions as a result of their training,
experience, and instruction. They are qualified
to carry out the required activities and in do-
ing so recognize and avoid potential hazards.
The definition of trained personnel and the
prohibition against employing non-qualified
personnel are laid down in DIN VDE 0105 and
IEC 364.
1.4 System pressure hazard
Lubrication systems are pressurized
during operation. Centralized lubri-
cation systems must therefore be
depressurized before starting assembly,
maintenance or repair work, or any
system modifications or system repairs.
Max. particle size 40 μm
Max. particle density 10 mg/m³
Pressure dew point 7°C
Water content max. 7800 mg/m³
Residual oil content max. 25 mg/m³
1.3 Electric shock hazard
Electrical connections for the described prod-
uct may only be established by qualified and
trained personnel authorized to do so by the
operator, and in observance of the local condi-
tions for connections and local regulations
(e.g., DIN, VDE). Significant bodily injury and
property damage may result from improperly
connected products.
Danger!
Performing work on an energized
pump or product may result in serious
injury or death.
Assembly, maintenance and repair work
may only be performed on products
that have been de-energized by quali-
fied technical personnel.
The supply voltage must be switched
off before opening any of the product's
components.

Page 8
EN Assembly instructions
2. Lubricants
2.1 General information
All products from SKF Lubrication
Systems may be used only for their
intended purpose and in accordance
with the information in the product's
assembly instructions.
Intended use is the use of the products for the
purpose of providing centralized lubrication/
lubrication of bearings and friction points us-
ing lubricants within the physical usage limits
which can be found in the documentation for
the devices, e.g., assembly instructions/operat-
ing instructions and the product descriptions,
e.g., technical drawings and catalogs.
Particular attention is called to the fact that
hazardous materials of any kind, especially
those materials classified as hazardous by
EC Directive 67/548/EEC, Article 2, Para. 2,
may only be filled into SKF centralized lubrica-
tion systems and components and delivered
and/or distributed with such systems and
components after consulting with and obtain-
ing written approval from SKF Lubrication
Systems.
No products manufactured by SKF Lubrication
Systems are approved for use in conjunc-
tion with gases, liquefied gases, pressurized
gases in solution, vapors, or such fluids whose
vapor pressure exceeds normal atmospheric
pressure (1013 mbar) by more than 0.5 bar at
their maximum permissible temperature.
Other media which are neither lubricants nor
hazardous substances may only be fed after
consulting with and obtaining written approval
from SKF Lubrication Systems.
SKF Lubrication Systems considers lubricants
to be a component of the system design which
must be factored into the selection of compo-
nents and the design of centralized lubrication
systems. The lubricating properties of the
lubricants are critically important in making
these selections.
2.2 Selection of lubricants
Observe the instructions from the
machine manufacturer regarding the
lubricants that are to be used.
Notice!
The amount of lubricant required at
a lubrication point is specified by the
bearing or machine manufacturer. It
must be ensured that the required
quantity of lubricant is provided to the
lubrication point. The lubrication point
may otherwise not receive adequate
lubrication, which can lead to damage
and failure of the bearing.
Selection of a lubricant suitable for the
lubrication task is made by the machine/
system manufacturer and/or the operator of
the machine/system in cooperation with the
lubricant supplier.
The bearings/friction points that require lubri-
cation, their expected load during operation,
and the expected ambient conditions are taken
into account during selection, with consider-
ation of economic and environmental aspects.

Page 9 EN
Assembly instructions
Where necessary, SKF Lubrication
Systems supports customers in the
selection of suitable components for
feeding the selected lubricant and in
the planning and design of a centralized
lubrication system.
Please contact SKF Lubrication Systems if you
have further questions regarding lubricants.
Lubricants can be tested in the company's
laboratory for their suitability for pumping
in centralized lubrication systems (e.g.,
"bleeding").
You can request an overview of the lubricant
tests offered by SKF Lubrication Systems from
the company's Service department.
2.3 Approved lubricants
Only lubricants approved for the
product may be used. Unapproved
lubricants that are unsuitable can lead
to failure of the product and damage to
property.
Different lubricants must not be mixed,
as mixing may result in damage and
necessitate costly and complicated
cleaning of the product/lubrication
system. It is recommended that an
indication of the lubricant in use be
attached to the lubricant reservoir in
order to prevent accidental mixing of
lubricants.
The described product can be operated using
lubricants that meet the specifications in the
technical data. Depending on the product
design, these lubricants may be oils, fluid
greases, or greases.
Oils and base oils may be mineral, synthetic,
and/or rapidly biodegradable. Consistency
agents and additives may be added depending
on the operating conditions.
Note that in rare cases there may be lubri-
cants whose properties are within permissible
limit values but whose other characteristics
render them unsuitable for use in centralized
lubrication systems. For example, synthetic lu-
bricants may be incompatible with elastomers.

Page 10
EN Assembly instructions
Follow the safety instructions on the
lubricant's safety data sheet.
Lubricants are hazardous substances. Fol-
low the safety instructions on the lubricant's
safety data sheet. The safety data sheet for a
lubricant can be requested from the lubricant
manufacturer.
2.5 Lubricant hazards
Centralized lubrication systems must
always be free of leaks. Leaking
lubricant is hazardous due to the risk
of slipping and injury. Beware of any
lubricant leaking out during assembly,
operation, maintenance, and repair of
centralized lubrication systems. Leaks
must be sealed without delay.
Lubricant leaking from centralized lubrication
systems is a serious hazard. Leaking lubricant
can create risks that may result in physical
harm to persons or damage to other material
assets.
2.4 Lubricants and the environment
Lubricants can contaminate soil and
bodies of water. Lubricants must be
properly used and disposed of. Observe
the local regulations and laws regarding
the disposal of lubricants.
It is important to note that lubricants are
environmentally hazardous, flammable
substances that require special precaution-
ary measures during transport, storage, and
processing. Consult the safety data sheet from
the lubricant manufacturer for information
regarding transport, storage, processing, and
environmental hazards of the lubricant that
will be used.
The safety data sheet for a lubricant can be
requested from the lubricant manufacturer.

Page 11 EN
Assembly instructions
3. Overview
FD3 Lubrication Pump Unit
1
3
25
4
Item Description
1 Ultrasonic sensor
2 Electrical pump connection
3 Grease reservoir
4 Pump body with pump inlet
and pump outlet
5 Filler socket

Page 12
EN Assembly instructions
4. Assembly
4.1 Information on assembly
The product should be protected from humid-
ity and vibration, and should be mounted so
that it is easily accessible, allowing all further
installation work to be done without difficulty.
Make sure there is adequate air circulation to
prevent the product from overheating. For the
maximum permissible ambient temperature,
see "Technical data."
The mounting position of the product is verti-
cal as shown in the assembly drawing.
During assembly and especially when drilling,
always pay attention to the following:
Existing supply lines must not be
damaged by assembly work.
Other units must not be damaged by
assembly work.
The product must not be installed within
range of moving parts.
The product must be installed at an
adequate distance from sources of heat.
Maintain safety clearances and comply
with local regulations for assembly and
accident prevention.

Page 13 EN
Assembly instructions
4.2 Setup and attachment
Install the FD3 lubrication pump unit on a
level, horizontal surface with the reservoir
arranged in an upward vertical position. The
mounting flange must not be under stress.
Ensure sufficient clearance during installation
for later service and maintenance work (see
page 14).
When the reservoir is empty and its cover
is removed, the agitator should be visible so
that the functioning and direction of rotation
of the pump can be checked. Ensure com-
plete cleanliness when filling lubricant into the
reservoir. Contaminants in the lubricant can
result in destruction of the pump. To prevent
contamination, only fill the pump through the
filler socket.
4.2.1 Assembly
Place fastening screws
ISO 4017-M10x40-8.8 (4x)
into the mounting flange.
Gently tighten fastening screws and align
the FD3 lubricant pump.
Tighten fastening screws at a torque
of 45 Nm.
4.2 Assembly of the FD3 lubrication pump unit
Warning!
When drilling the assembly holes, you
must be careful of any supply lines or
other units, as well as of other hazards
such as moving components.
Maintain safety clearances and comply
with local regulations for assembly and
accident prevention.
Warning!
Do not tilt or drop the FD3 lubricant
pump!
Danger!
The reservoir cover must be installed
before turning on or commissioning the
FD3 lubricant pump. The agitator may
cause injury if the reservoir cover is not
installed.

Page 14
EN
4.2.2 Mounting dimensions
FD3 Lubrication Pump Unit
min
max
50
215
330
15 300
27
50
58
109
280
240 Ø11
ca. 370
20
233
H1
170
H2
H4
H3
ca 400
Ultrasonic sensor
Pressure relief valve
Internal Ø 389
Filler socket G 3/4"
Outlet G 3/4"
Return line G 3/4"
Reservoir 45
kg
65
kg
100
kg
H1 380 550 840
H2 550 730 1050
H3 603 783 1103
H4 812 992 1312
Ensure sufficient clearance for
maintenance and assembly work.
Assembly instructions

Page 15 EN
Assembly instructions
4.2.3 Technical data
Technical data
General
Mountingposition .....................................vertical
Ambient temperature range . . . . . . . . . . . . . . . . . . . . -25 °C to +60 °C
Reservoir....................................45,65or100kg
Pump
Drive...........................................electricmotor
Type . . . . . . . . . . . . . . . . . . axial piston pump with two or three pistons
Operating pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 400 bar
(with pressure relief valve set and sealed)
Oil filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAE 90 (approx. 1.6 l)
Pumped medium . . . . . . greases up to NLGI Grade 3 with worked
penetration > 200 1/10 mm and oils
classified under ISO VG with operating viscosity
> 50 mm2/s
Deliveryvolume.................................approx.7kg/h
approx. 14 kg/h
approx. 20 kg/h
Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to 600 bar
Filterrating ....................................... 0.270mm
Motor
Type/size .....................................B14/80C120
Typeofvoltage.................................3-phasecurrent
Protectionclass......................................... IP55
(ATEX design on request)
Rated
speed
[rpm]
Frequency
[Hz]
Rated
output
[kw]
Rated
voltage
[V]
Rated
current
[A]
Order
code
1000 50 0,55 230/400 3,0/1,73 AG07
1000 50 0,55 290/500 2,65/1,55 AG07
Fill level switch
Ultrasonic sensor
Type........................................... (min.-max.)
Protectionclass......................................... IP67

Page 16
EN Assembly instructions
4.3 Checking the delivery and return lines
and connecting the filler line
Warning!
The FD3 pump is designed as a dual-
line pump. Therefore, the return line
and outlet (via changeover valve con-
nected to the main feed lines) must be
connected. Do not close any lubricant
outlets.
Use compressed air to check whether both
lines (1) (2) are clear.
Loosen and remove the lubricant retention
screw on the return line connection.
Prefill the lines (1) (2) using a hand pump
or drum pump.
4.4 Filling via a drum pump
Prefill the filler ine
Fit filler line onto filler socket thread (3)
(G 3/4") and tighten.
Connecting the main feed line and filler line
Example of a 2-string electromagnetically actuated dual-line system with FD3 pump
1
2
Lubricant retention screw
- remove during assembly!
Return line G 3/4"
Filler socket (3) G 3/4"
Outlet G 3/4"

Page 17 EN
Assembly instructions
4.5 Electrical motor connection
Connect the pump unit motor according to
the specifications on the motor rating plate
and the motor characteristics.
Electric shock hazard
Electrical connections for the product
may only be established by qualified
and trained personnel authorized to do
so by the operator. The local conditions
for connections and local regulations
(e.g., DIN, VDE) must be observed.
Significant bodily injury and property
damage may result from improperly
connected products.
Warning!
Connect lines in accordance with the
technical specifications and the local
conditions for connections and local
regulations (e.g., DIN, VDE).
Consult the motor's rating plate for the
electrical characteristics of the motor, such as
rated power, rated voltage, and rated current.
Observe the guidelines in EN 60034-1
(VDE 0530-1) for operating at the limits of
the ranges A (combination of ±5% voltage
deviation and ±2% frequency deviation) and B
(combination of ±10% voltage deviation and
+3/-5% deviation). This applies especially with
regard to heating and deviations in operating
parameters from the ratings on the motor's
rating plate. The limits must never be ex-
ceeded.
The available mains voltage (supply voltage)
must be in accordance with the specifications
on the rating plate of the motor or of the elec-
trical components. Check the fuse protection
of the electrical circuit. Use only fuses with the
prescribed amperage, else bodily injury and
property damage may result.
Be sure to connect the motor so as to guar-
antee a continuously safe electrical connection
(no protruding wire ends); use the assigned
cable end fittings (e.g., cable lugs, wire end
ferrules). Select connecting cables conform-
ing to DIN VDE 0100 taking into account the
rated current and the conditions of the specific
system (e.g., ambient temperature, type of
routing, etc. in accordance with DIN VDE 0298
or IEC / EN 60204-1). Details regarding elec-
trical connection of the motor to the power
supply, especially terminal and connector pin
assignment, can be taken from the customer's
drawing for the reservoir unit.
Warning!
When establishing electrical connection
of the pump motor, be mindful of the
correct direction of motor rotation.
If the direction of motor rotation is
marked on the product by an arrow in-
dicator, the motor's direction of rotation
must match the arrow.

Page 18
EN Assembly instructions
Connection diagram for ultrasonic sensor
4.6 Electrical connection of
FD3 lubricant pump
Make the electrical connection in accordance
with the terminal diagram displayed inside the
terminal box cover and in conformity with the
applicable VDE guidelines.
See the motor's rating plate for the required
operating voltage, frequency, and rated
current.
Ensure that direction of rotation of the motor
on the pump unit is correct as shown by the
attached arrow.
Warning!
Connect lines in accordance with the
technical specifications and the local
conditions for connections and local
regulations (e.g., DIN, VDE).
+ UO
Sync.
Switching output 1
Switching output 2
+ UB
V15 plug connector
Membrane keyboard
LED window
Electrical connections
Sensor
Terminal box
Rating plate
4.7 Electrical connection of
ultrasonic sensor

Page 19 EN
Assembly instructions
4.8.1 Lubrication line arrangement
When arranging the main lubricant lines and
lubrication point lines, observe the follow-
ing instructions in order to ensure that the
entire lubrication system functions smoothly.
The main lubricant line must be dimensioned
in accordance with the maximum operating
pressure occurring in the lubrication unit used
and the delivery volume of that lubrication
unit. If possible, the main lubricant line should
rise upward from the lubrication unit and be
ventable at the highest point on the lubrication
line system. Lubricant distributors at the end
of the main lubricant line must be installed
such that the outlets of the lubricant distribu-
tors point upwards. If the system configura-
tion requires that the lubricant distributors be
arranged below the main lubricant line, they
should not be placed at the end of the main
lubricant line.
The pipes, tubes, shutoff valves, directional
control valves, fittings, etc. that will be used
must be designed for the maximum operating
pressure of the lubrication unit, the permis-
sible temperatures and the lubricants that will
be delivered.
All components of the lubrication line system
such as pipes, tubes, shutoff valves, directional
control valves, fittings, etc. must be carefully
cleaned before assembly. No seals should
point inward in the lubrication line system, as
this could hinder lubricant flow and introduce
contaminants into the lubrication line system.
Warning!
Lubrication lines must always be free of
leaks. Lubrication lines should always
be arranged so that air pockets cannot
form anywhere. Avoid changes in the
cross-section of the lubrication line
from small to large cross-sections in
the direction of flow of the lubricant.
When the cross-section does change,
the transition should be gentle.
4.8 Lubrication line connection
The lubrication line must be connected to the
lubrication unit in such a way that no forces
can be transferred to the assembled lubrica-
tion unit (stress-free connection).
Danger!
The fittings used to connect the
lubrication line should be rated for the
maximum operating pressure of the
lubrication unit. If they are not, the
lubrication line system needs to be
protected from excessive pressure by
means of a pressure-limiting valve.
For operating pressures up to 45 bar as can
occur especially in single-line piston distribu-
tor systems, SKF fittings for solderless pipe
unions can be used (double tapered sleeves or
tapered sleeves). For higher operating pres-
sures up to 250 bar as can occur especially
in progressive centralized lubrication systems,
SKF cutting-sleeve screw unions conforming
to DIN 2353 can be used. If using fittings from
other manufacturers, pay careful attention to
the assembly instructions and technical speci-
fications provided by the manufacturer.

Page 20
EN
The flow of lubricant in the lubrication lines
should not be hindered by the installation
of sharp bends, angle valves, or flap valves.
Any unavoidable changes in the cross-section
of the lubrication line should be realized as
gentle transitions. Sudden changes of direc-
tion should be avoided if possible.
Warning!
Centralized lubrication systems must
always be free of leaks. Leaking
lubricant is hazardous due to the risk
of slipping and injury. Beware of any
lubricant leaking out during assembly,
operation, maintenance, and repair of
centralized lubrication systems. Leaks
must be sealed without delay.
Lubricant leaking from centralized lubrication
systems is a serious hazard. Leaking lubricant
can create risks that may result in physical
harm to persons or damage to other material
assets.
Warning!
Follow the safety instructions on the
lubricant's safety data sheet.
Lubricants are hazardous substances. Fol-
low the safety instructions on the lubricant's
safety data sheet. The safety data sheet for a
lubricant can be requested from the lubricant
manufacturer.
Assembly instructions