SKF MSU Series User manual

EN
MSU Gear Pump Unit Assembly instructions acc. to EC Dir. 2006/42/EC
for partly completed machinery with associated operating instructions
Version 03
for industrial machinery for use in
single-line centralized oil lubrication systems

Notes
Masthead
These assembly instructions with associated op-
erating instructions according to EC Machinery
Directive 2006/42/EC are an integral part of
the described product and must be kept for fu-
ture use.
These assembly instructions with associated op-
erating instructions have been prepared in ac-
cordance with the established standards and
rules for technical documentation, VDI 4500
and EN 292.
©SKF Lubrication Systems Germany GmbH
This documentation is protected by copyright.
SKF Lubrication Systems Germany GmbH
reserves all rights, including those to the
photomechanical reproduction, duplication,
and distribution by means of special procedures
(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 addresses:
SKF Lubrication Systems Germany GmbH
Berlin Plant
Motzener Strasse 35/37
12277 Berlin
Germany
Tel. [phone]
Fax [phone]
www.skf.com/lubrication
Hockenheim Plant
2. Industriestrasse 4
68766 Hockenheim
Germany
Tel. [phone]
Fax [phone]
www.skf.com/lubrication
Page 2
EN

Information concerning EC Declaration of Confor-
mity and EC Declaration of Incorporation 4
Explanation of symbols and signs 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
1.5 Existing residual risks
(residual risk assessment) 8
2. Lubricants 10
2.1 General information 10
2.2 Selection of lubricants 10
2.3 Approved lubricants 11
2.4 Lubricants and the environment 12
2.5 Lubricant hazards 12
3. Overview 13
3.1 Product code 14
3.1.1 Order example 14
4. Assembly 15
4.1 General information 15
4.2 Setup and attachment 15
4.2.1 Mounting equipment 16
4.2.2 Motor ventilation/Minimum mounting
dimensions 16
Assembly instructions table of contents
4.3 Assembly of the MSU gear pump 17
4.3.1 Mounting diagram 18
4.3.2 Dimensions of the MSU gear pump unit 19
4.4 Electrical connection 20
4.4.1 General information 20
4.4.2 Electric motor and sensor connections 21
4.4.3 Electrical characteristics, 230 VAC design 22
4.4.4 Electrical characteristics, 24 VDC design 24
4.5 Lubrication line arrangement 26
4.6 Venting the centralized lubrication system 27
4.7 Note on the rating plate 27
Operating instructions
1. Safety instructions 30
1.1 General information 30
1.2 Disclaimer of liability 30
2. Lubricants 30
3. Transport, delivery, and storage 31
3.1 General information 31
3.2 Lubrication units 31
3.3 Electronic and electrical device 31
3.4 General notes 31
4. Assembly 32
4.1 Information on assembly 32
5. Design and function 32
5.1 General information 32
5.2 Design 32
5.3 Functional description 33
6. Control elements 34
6.1 Pushbutton DK 34
7. Commissioning 34
7.1 General information 34
7.2 Commissioning procedure 35
8. Decommissioning and disposal 35
8.1 Temporary shutdown 35
9. Maintenance and service 36
9.1 General information 37
9.2 Maintenance and repair 37
9.3 Service 37
9.4 Replacing a defective fuse (24 VDC) 38
10. Operational and pump faults 39
10.1 General information 39
10.2 Venting the pump unit 39
11. Technical data 41
11.1 Electrical characteristics 41
12. Accessories 42
Page 3 EN
Table of contents

Page 4
EN
The product,
compact unit
of the series: MSU
is hereby confirmed to comply with the essen-
tial protection requirements stipulated by the
Directive(s) of the Council on the approxima-
tion of laws of the Member States concerning:
Machinery Directive 2006 2006/42/EG
Electromagnetic Compatibility 2014/30/EU
Low Voltage Devices 2014/35/EU
RoHS II Directive 2011/65/EU
Notes:
Information concerning EC Declaration of Conformity and EC Declaration of Incorporation
Information concerning EC Declaration of Conformity and EC Declaration of Incorporation
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 nor-
mal 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 bySKF Lubrication
Systems Germany GmbH 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 Germany
GmbH classifies them according to Article 3,
Para. 3 of the Directive. The Declaration of
Conformity and Incorporation forms part of the
product documentation and is supplied togeth-
er with the product.
(a) This declaration certifies compliance with
the aforementioned Directives but does not
constitute a guarantee of characteristics.
(b) The safety instructions in the documenta-
tion included with the product must be
observed.
(c) The commissioning of the products here
certified is prohibited until the machine, ve-
hicle, or similar in which the product is in-
stalled conforms with the provisions and
requirements of the applicable Directives.
(d) The operation of the products at non-
standard supply voltage, as well as non-
adherence to the installation instructions,
can negatively impact the EMC characteris-
tics 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 application of the EC Directive,
commissioning shall be prohibited until the
machinery in which this part is installed
conforms with the provisions of this
Directive.
The aforementioned product may, with ref-
erence to EC Directive 97/23/EC concern-
ing 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:

Informational symbols
Note!
Prompts an action
Used for itemizing
Points out other facts,
causes, or consequences
Provides additional information
Environmentally sound disposal
Hazard symbols
General hazard
DIN 4844-2-W000
Electrical voltage/current
Hot surface
Danger of being drawn into machinery
DIN 4844-2-W008
DIN 4844-2-W026
BGV 8A
Slipping hazard
DIN 4844-2-W028
Page 5 EN
Indicators used with safety instructions
and their significance
Explanation of symbols
Explanation of symbols and signs
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.
Signal word meaning
Danger! Danger of bodily injury
Warning! Danger of damage to
property and the
environment
Note! Provides additional
information
Instructions placed directly on the machines/
grease lubrication pump units, such as:
Rotation arrows
Fluid connection labels
must be followed and kept in fully legible
condition.
You are responsible!
Please read the assembly and operating inst-
ructions thoroughly and follow the safety
instructions.

Page 6
EN Assembly instructions
The operator of the described prod-
uct must ensure that the assembly
instructions 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 ac-
cordance with the generally accepted rules and
standards of industry practice and with occu-
pational safety and accident prevention regula-
tions. 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
1.1 Intended use
The gear pump units of the SKF MSU series
are designed for the supply of centralized lub-
rication systems in plants and machines. The
gear pump units pump mineral oil based and
synthetic oil based lubricants with an operating
viscosity of 20 to 2000 mm²/s depending on
the type of operation.
S3 10% ON-time, 10-minute switching cycle:
20 to 120 mm²/s ;
S3 3% ON-time, 30-minute switching cycle:
20 to 2000 mm²/s
Any other usage is deemed non-compliant
with the intended use.
In particular, the described 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 described here is neither designed
nor approved for use in conjunction with gas-
es, liquefied gases, pressurized gases in solu-
tion, vapors, or such fluids whose vapor pres-
sure exceeds normal atmospheric pressure
(1013 mbar) by more than 0.5 bar at their
maximum permissible temperature.
Unless specially indicated otherwise, products
fromSKF Lubrication Systems Germany GmbH
are not approved for use in potentially explosive
areas as defined in the ATEX Directive 94/9/EC.
instructions. In particular, any malfunctions
which may affect safety must be remedied
immediately.

Page 7 EN
Assembly instructions
1.2 Authorized personnel
Only qualified technical personnel may install,
operate, maintain, and repair the products de-
scribed in the assembly instructions. Qualified
technical personnel are persons who have
been trained, assigned, and instructed by the
operator of the final product into which the de-
scribed product is incorporated. Such persons
are familiar with the relevant standards, rules,
accident prevention regulations, and assembly
conditions as a result of their training, experi-
ence, and instruction. They are authorized to
identify and perform necessary actions while
avoiding any risks which may arise.
The definition of qualified personnel and the
prohibition against employing non-qualified
personnel are laid down in DIN VDE 0105 and
IEC 364.
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 prod-
ucts that have been de-energized by
qualied technical personnel. The
supply voltage must be switched off
before opening any of the product's
components.
1.4 System pressure hazard
Lubrication systems are pressurized
during operation. Centralized lubrication
systems must therefore be depressur-
ized before starting assembly, main-
tenance or repair work, or any system
modications or decommissioning.

1.5 Existing residual risks (residual risk assessment)
Page 8
EN
Residual risk Remedy
Life cycle: Assembly
During installation of the lubrication line -
The pump outlet port has broken off from the
pump housing due to inadequate counterforce
at the pump outlet port.
• Apply an open-end wrench (size 14 mm) to the pump outlet port and counter the following turn-
ing torque
Reservoir rupture due to excess filling by the
filling pump.
• Monitor the filling process and stop filling once the "MAX" mark is reached
People slipping due to floor contamination
with spilled/leaked lubricant
• Exercise caution when filling and when closing the filler socket cap
• Promptly apply suitable binding agents and remove the leaked/spilled lubricant
• Follow operational instructions for handling oils and contaminated parts
Tearing/damage to lines when installed on
moving machine components
• If possible, do not install on moving parts; if this cannot be avoided, use flexible hose lines.
Life cycle: Commissioning/operation
Lubricating oil spraying out due to faulty
component fitting/line connection.
• Tighten all components with the appropriate torques. Use hydraulic connections and lines suitable
for the indicated pressures. These must be checked for proper connection and for damage prior to
commissioning.
People slipping due to floor contamination
with spilled/leaked lubricant
• Exercise caution when filling and when closing the filler socket cap
• Promptly apply suitable binding agents and remove the leaked/spilled lubricant
• Follow operational instructions for handling oils and contaminated parts.
Life cycle: Setup, retrofit
People slipping due to floor contamination
with spilled/leaked lubricant
• Exercise caution when filling and when closing the filler socket cap
• Promptly apply suitable binding agents and remove the leaked/spilled lubricant
• Follow operational instructions for handling oils and contaminated parts

Page 9 EN
Residual risk Remedy
Fire hazard when working with an open cap • Turn off pump unit and allow motor to cool down prior to performing work
Life cycle: Malfunctions, fault-finding
Strong heating of the motor due to a motor jam • Turn off the pump motor and let it cool down. Remedy the cause
People slipping due to floor contamination with
spilled/leaked lubricant
• Exercise caution when filling and when closing the filler socket cap
• Promptly apply suitable binding agents and remove the leaked/spilled lubricant
• Follow operational instructions for handling oils and contaminated parts
Fire hazard when working with an open cap • Turn off pump unit and allow motor to cool down prior to performing work
Life cycle: Maintenance, repair
Electric shock (AC voltage design) • De-energize the MSU prior to maintenance work
People slipping due to floor contamination with
spilled/leaked lubricant
• Exercise caution when filling and when closing the filler socket cap
• Promptly apply suitable binding agents and remove the leaked/spilled lubricant
• Follow operational instructions for handling oils and contaminated parts
Fire hazard when working with an open cap • Turn off pump unit and allow motor to cool down prior to performing work
Life cycle: Decommissioning, disposal
Environmental contamination by lubricants and
wetted parts
• Dispose of contaminated parts according to the applicable legal/company rules
People slipping due to floor contamination with
spilled/leaked lubricant
• Exercise caution when filling and when closing the filler socket cap
• Promptly apply suitable binding agents and remove the leaked/spilled lubricant
• Follow operational instructions for handling oils and contaminated parts
Environmental contamination by lubricants and
wetted parts
• Dispose of contaminated parts according to the applicable legal/company rules

Page 10
EN
2. Lubricants
2.1 General information
All products from SKF Lubrication
Systems Germany GmbH 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 using
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 the
materials classified as hazardous by EC
Directive 67/548/EEC, Article 2, Para. 2, may
only be filled into SKF centralized lubrication
systems and components and delivered and/or
distributed with such systems and components
after consulting with and obtaining written ap-
proval from
SKF Lubrication Systems Germany GmbH.
No products manufactured by SKF Lubrication
Systems Germany GmbH are 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 permissible
temperature.
Other media which are neither lubricant nor
hazardous substance may only be fed after
consultation with and written approval from
SKF Lubrication Systems Germany GmbH.
SKF Lubrication Systems Germany GmbH con-
siders lubricants to be an element of system
design and must always be factored into the
selection of components and the design of
centralized lubrication systems. The lubricating
properties of the lubricants are critically im-
portant in making these selections.
2.2 Selection of lubricants
Observe the instructions from the
machine manufacturer regarding the
lubricants that are to be used.
Warning!
The amount of lubricant required at
a lubrication point is specied 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.
When selecting a lubricant, the type of bear-
ing/friction point, their expected load during
operation, and the anticipated ambient condi-
tions must be taken into account. All economic
and environmental aspects must also be
considered.
Assembly instructions

Page 11 EN
SKF Lubrication Systems Germany
GmbH 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
Germany GmbH if you have further questions
regarding lubricants.
You can request an overview of the lubricant
tests offered by SKF Lubrication Systems
Germany GmbH from the company's Service
department.
2.3 Approved lubricants
Warning!
Only lubricants approved for the prod-
uct may be used. Unsuitable lubricants
can lead to failure of the product and to
property damage.
Warning!
Different lubricants must not be mixed
together. Doing so can cause damage
and require costly and complicated
cleaning of the product/lubrication sys-
tem. It is recommended that an indica-
tion of the lubricant in use be attached
to the lubricant reservoir in order to
prevent accidental mixing of lubricants.
The product described here can be operated
using lubricants that meet the specifications in
the technical data.
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.
Assembly instructions

Page 12
EN
2.5 Lubricant hazards
Danger!
Centralized lubrication systems must al-
ways be free of leaks. Leaking lubricant
is hazardous due to the risk of slipping
and injury. Be mindful of any lubricant
leaking out during assembly, operation,
maintenance, and repair of centralized
lubrication systems. Leaks must be
sealed off 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
Warning!
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 envi-
ronmentally hazardous, flammable substances
which require special precautionary measures
during transport, storage, and processing.
Consult the safety data sheet from the lubri-
cant manufacturer for information regarding
transport, storage, processing, and environ-
mental hazards of the lubricant that will be
used.
The safety data sheet for a lubricant can be re-
quested from the lubricant manufacturer.
Assembly instructions
Follow the safety instructions on the
lubricant's safety data sheet.

PP
Unit components
3. Overview
1
6
3
5
8
4
2
7
9
11
Unit components
Item Description Chapter
1 Fastening holes 4.3/4.31
2 Pressure-regulating valve
3 Lubricant reservoir OI Chap. 5.3
4 Filler socket with strainer
5 Float switch
(fill level switch) 4.4.3
6 Pushbutton (DK) OI Chap. 6.1
7 Cable fitting 4.3.2
8 Electrical connection 4.4 - 4.4.31
9 Pressure switch
10 Cover cap 4.4.2
11 Pressure gauge OI Chap. 12
12. Screw plug 9.2
13. Fuse (24 VDC) OI Chap. 9.4
OI = Operating instructions
10
230 VAC
24 VDC
1
2
3
4
5
6
7
8
9
11
10
12
12
13
Page 13 EN
Assembly instructions
0,5bar
P
1~
M
10 bar/20 bar
13 bar/23 bar

Page 14
EN Assembly instructions
3.1.1 Order examples
MSU1-11AA10010+428
MSU series compact unit for an oil delivery rate
of 0.1 l/min. (1), operating pressure 13 bar (1),
with a 2 liter lubricant reservoir (1), with oil
level monitoring (flow switch) (A), with pressu-
re switch, NO-contact 10 bar (A), with 1x cable
gland M20x1.5 (1), with pressure gauge 25 bar
(1), connection port (for main line) M10x1
(port thread) (0), with push-button (1), place-
holder (0), rated voltage 230 VAC (+428)
MSU1-21AB12010+428
MSU series compact unit for an oil delivery rate
of 0.1 l/min. (1), operating pressure 23 bar (2),
with a 2 liter lubricant reservoir (1), with oil
level monitoring (flow switch) (A), with pressu-
re switch, NO-contact 20 bar (B), with 1x cable
gland M20x1.5 (1), with pressure gauge 40
bar (2), connection port (for main line) M10x1
(port thread) (0), with push-button (1), place-
holder (0), rated voltage 230 VAC (+428)
Table of product codes
Compact unit
for oil supply of
product series MSU
Delivery rate
1 = 0,1 l/min
Operating pressure
1 = 13 bar
2 = 23 bar
Lubricant reservoir
1 = 2 liters, plastic
Fill level monitoring
0 = without fill level monitoring
A = with float switch, NC contactt
Pressure switch
0 = without pressure switch
A = with pressure switch
NO-contact, 10 bar 1)
B = with pressure switch
NO-contact, 20 bar 2)
Voltage key
428 = 230 VAC, 50/60 Hz
410 = 220 VAC, 50/60 Hz
924 = 24 VDC
Platzhalter
0 = not available
Pushbutton
0 = without pushbutton
1 = with pushbutton
Pump outlet port
0 = M10x1 (optionally with double-
cone olive fitting acc. to
DIN 3862)
1 = Quick connector (tube Ø 6 mm)
2 = Swivel quick connector
(tube Ø 6 mm
Pressure gauge
0 = without Pressure gauge
1 = with Pressure gauge 25 bar 1)
2 = with Pressure gauge 40 bar 2)
Electric connection port
1 = 1x Cable connector M20x1,5
2 = 2x Cable connector M20x1,5
MSU x-x x x x x x x x 0 +xxx
1) only Version Operating pressuer 13 bar
2) only Version Operating pressuer 23 bar

4. Assembly
4.1 General information
Only qualified technical personnel may install,
operate, maintain, and repair the MSU gear
pump unit. Qualified technical personnel are
persons who have been trained, assigned, and
instructed by the operator of the final product
into which the described product is incorpo-
rated. Such persons are familiar with the rel-
evant standards, rules, accident prevention
regulations, and operating conditions as a re-
sult of their training, experience, and instruc-
tion. They are qualified to carry out the re-
quired activities and in doing so recognize and
avoid potential hazards.
The definition of qualified personnel and the
prohibition against employing non-qualified
personnel are laid down in DIN VDE 0105 and
IEC 364.
Before assembling/setting up the MSU gear
pump unit, the packaging material and any
shipping braces (e.g., plugs) must be removed.
The packaging material must be preserved
until any discrepancies are resolved.
4.2 Setup and attachment
The pump unit should be installed in a place
protected from contamination, water splashes,
and vibrations. It should, however, be easily ac-
cessible so that all further installation work can
be performed without difficulty and the device
can be filled easily later.
The fill level of the reservoir must be clearly
visible.
The unit is mounted in a vertical position.
Assembly holes must be made according to the
diagram later in this text (Chapter 4.3.1 ).
Design specifications and conditions of the
manufacturer and the object must be observed
when installing the pump unit.
During assembly and especially when drilling,
always pay attention to the following:
Existing supply lines must not be dam-
aged by assembly work.
Other units must not be damaged by as-
sembly work.
The product must not be installed within
range of moving parts.
The product must be installed at an ad-
equate distance from sources of heat.
The product must be mounted vertically in
accordance with the specications of the
documentation.
Pressure gauges, oil level glasses, and
other visual monitoring equipment must
be clearly visible.
Protruding parts such as pressure gauges
may not be misused as handles or grips.
Do not tilt or drop the MSU gear pump
unit.
Warning!
Do not tilt or drop the MSU gear pump
unit.
Page 15 EN
Assembly instructions

Warning!
When drilling the assembly holes, you
must be careful of any supply lines or
other units, as well as of other haz-
ards such as moving parts. Maintain
safety clearances and comply with local
regulations for assembly and accident
prevention.
4.2.1 Mounting equipment
Install the pump units on the system/machine
using two M8 screws with a minimum length of
20 mm.
Fastening material to be provided by the cus-
tomer:
Hexagon socket screws (2x)
per DIN912-M8x....-8.8
Washers (2x)
per DIN 125-B8, 4 pc.
(if necessary)Hexagon nuts (2x)
per DIN439-BM8-6
Note!
The torque of the xing screws (hexa-
gon socket screws) depends on the cus-
tomer’s installation. SKF recommends a
torque between 12 and 15 Nm.
Warning!
On the pump units' electrical connec-
tions, ensure that appropriate measures
prevent interference between signals
due to inductive, capacitive, or electro-
magnetic couplings. Shielded cables
must be used in places where electrical
interference elds can distort signal
transmissions despite separate laying
of cables.
The rules and empirical values for
"EMC-compliant" cabling must be taken
into consideration.
Page 16
EN Assembly instructions
4.2.2 Motor ventilation/Minimum mounting
dimensions
The MSU gear pump unit is equipped with two
venting slots (see page 18, Fig. 1) to prevent
condensation from forming. During the follow-
ing assembly procedure, make sure that these
venting slots are not closed.
The gear pump unit must therefore be in-
stalled on a level and firm (not soft) surface.
To ensure enough space for maintenance work
and for any disassembly of the pump unit, en-
sure that the minimum mounting dimensions
(see pages 18-19, Fig. 1 and Fig. 2) are
maintained.

4.3 Assembly of the MSU gear pump
See Figure 1 on the following page

Make assembly holes Ø 8.8 mm (2x)
according to the drilling pattern in Figure 1
at the mounting location; deburr the as-
sembly holes
Place the MSU gear pump unit at the
mounting location and align it to the holes
Apply the fixing screws (M8) (2x) with
washers (2x) to the fastening holes on the
MSU and the mounting location; if neces-
sary, tighten gently using M8 nuts (2x)
Align the gear pump unit
Note!
Ensure clearance for the venting slot
(see Fig. 1 and Chapter 4.2.2).
Note!
The torque of the xing screws is de-
termined by the customer. SKF recom-
mends a torque between 12 and 15 Nm.
Connect a lubrication line to the pump outlet
See Figure 2
At Port pump outlet: For quick connector versi-
on the lubricant line has to be cut and connect
to quick connector. For Version M10x1 proceed
as follows:
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).
Note!
The ttings and tubes used for the
connection of the lube points must
withstand the operating pressures listed
in table 1.
To prevent the pump outlet port from
possibly breaking off from the pump
housing in the following assembly proce-
dure (see Fig. 1), counterforce against the
turning torque must be maintained using
an open-end wrench (size 14 mm) applied
to the pump outlet port.
Position the lubricant line with connection
thread M10x1 on the thread of the pump
outlet port.
Place an open-end wrench (size 14 mm) on
the hexagon screw of the pump outlet port
Screw the lubricant line into the pump
outlet port; in the process, use the open-
end wrench to maintain counterforce
against the turning torque
Operating pressures, tubes and fittings, table 1
Version MSU1-1... +XXX > 14 bar
Version MSU1-2 ... +XXX > 25,5 bar
Tighten the fixing screws (M8) (2x) using a
torque wrench
Page 17 EN
Assembly instructions

4.3.1 Mounting diagram
Page 18
EN Assembly instructions
154
178
182.5
21.6
B
AC
2x�Ø 8.8
154 12
(178)
Minimum mounting dimensions
A = width: 210 mm
B = height 350 mm
C = depth 150 mm
A
A = Venting slot
Assembly holes
Mounting diagram, Fig. 1
Cover cap
(with recessed head
screws)
Connection cable provided by
customer
Pump outlet port, M10x1
Connection for lubricant line (Pozidriv PZ2)

4.3.2 Dimensions of the MSU gear pump unit
Page 19 EN
Assembly instructions
Dimensions of the MSU gear pump unit, Fig. 2
276.5
141
179
44
104
M10x1
P
178
182.5
21.6
132.5
32.5
A
View A
Pump outlet M10x1
Connection for lubricant line
for connection cable Ø 6 mm
up to Ø 12 mm
Cover cap

4.4 Electrical connection
4.4.1 General information
The MSU gear pump unit is driven by a 230 V
50/60 Hz single-phase AC motor or optionally
by a 24 VDC DC motor.
In both designs, the cables are introduced
through a cable fitting with a clamping range
of Ø 6 to Ø 12 mm and the unit's electrical
connections are established through terminal
blocks with tension springs (maximum conduc-
tor cross-section: 2.5 mm, conductor stripping
length: 8-9 mm). Only the protective earth
conductor (in the AC design) is connected by
the customer using a flat tab receptacle mea-
suring 6.3 x 0.8 mm.
Danger!
Electrical connections for the product
may only be established by qualied 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. Serious
injury or death and property damage
may result from improperly connected
products.
Danger!
The available mains voltage (supply
voltage) must be in accordance with
the specications on the rating plate of
the motor or of the electrical compo-
nents. Check the fuse protection of the
electrical circuit. Use only fuses with the
prescribed amperage, else bodily injury
and property damage may result.
Consult Chapter 4.4.3 for the electrical charac-
teristics of the electric motor, such as rated
power, rated voltage, and rated current.
The electrical circuit diagram of the MSU gear
pump unit is affixed inside the unit's cover cap
and can be accessed by removing the cap.
The MSU gear pump unit is supplied without a
control unit.
The MSU (and thereby the lubrication interval)
is controlled by the customer's control unit for
the machine on which the MSU is mounted.
Page 20
EN Assembly instructions