Bosch Rexroth RE15325-WA User manual

Operating instructions

RE 15325-WA, Version: 02.2020, Replaces: 04.2018, EN

Installation & Maintenance

manual

Hägglunds DUe

Drive unit

The data in this document only serve

to describe the product. No statements

concerning a certain condition or suitability

for a certain application can be derived from

our information. The information given does

not release the user from the obligation of

own judgment and verication. It must be

remembered that our products are subject to

a natural process of wear and aging.

specications and other information set forth

in it, are the exclusive property of Bosch

Rexroth AG. It may not be reproduced or

given to third parties without its consent.

Changes in the equipment may occur. We

therefore reserve the right to introduce

amendments in the manual as we deem

necessary without notice or obligations.

This Installation and maintenance manual

is valid for Drive Units manufactured

after 01.04.2012. For older Drive Units

please contact your nearest Bosch Rexroth

representative.

The cover shows an example conguration.

The product supplied may therefore differ

from the gure shown.

The original operating instructions were

prepared in English.

RE 15325-WA, Version 02.2020, Bosch Rexroth AG

Contents | Hägglunds DUe Drive unit 3/92

Contents

1 Aboutthisdocumentation ..................................................................... 5

1.1 Validity of the documentation ...................................................................5

1.2 Required and additional documentations .................................................5

1.3 Presentation of information ......................................................................5

1.3.1 Safety messages .......................................................................................6

1.3.2 Symbols ...................................................................................................6

2 Safetyinstructions ................................................................................ 7

2.1 About this chapter ....................................................................................7

2.2 Intended use ............................................................................................7

2.3 Improper use ............................................................................................8

2.4 Personnel qualications ...........................................................................8

2.5 General safety instructions .......................................................................9

2.6 Product and technology-related safety messages ...................................10

2.7 Personal protective equipment ...............................................................12

3 Generalnotesregardingpropertydamagesandproductdamages ...... 13

4 Scopeofdelivery ................................................................................ 15

5 Aboutthisproduct .............................................................................. 15

5.1 Product description ................................................................................15

5.2 Product identication .............................................................................15

5.3 Main components ...................................................................................16

5.4 Hydraulic uids ......................................................................................19

5.5 Requirements for hydraulic uid cleanliness ..........................................20

5.6 Cooling water  ........................................................................................21

5.7 Drive Unit monitoring .............................................................................22

6 Transportandstorage ......................................................................... 23

6.1 Storage of the packed Drive Unit  ...........................................................23

6.2 Lifting the packed Drive Unit ..................................................................24

7 Installation ......................................................................................... 25

7.1 Installation directives .............................................................................25

7.2 Lifting methods ......................................................................................25

7.3 Positioning the Drive Unit .......................................................................27

7.4 Mounting of the cabinet feet ..................................................................30

7.5 Mounting of main electric motor ............................................................31

7.6 Mounting of top cover ............................................................................34

7.7 Hydraulic connections ............................................................................38

7.8 Mounting of air-oil cooler .......................................................................42

7.8.1 HDC 050 - HDC 060 ................................................................................ 42

7.8.2 HDC 080 - HDC 100 ................................................................................ 44

7.9 Water connection ...................................................................................47

7.10 Mounting of water-oil plate cooler ..........................................................47

7.11 Mounting of water-oil tube cooler ........................................................... 48

7.12 Mounting of sound protection ................................................................49

7.13 Mounting of rain protection ....................................................................51

7.14 Pipe work, internal .................................................................................52

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Bosch Rexroth AG, Version 02.2020, RE 15325-WA

7.15 Electric connections ...............................................................................53

7.15.1 Safety precautions ..................................................................................53

7.15.2 Control system box and additional box ..................................................54

7.15.3 Air-oil cooler ...........................................................................................54

7.15.4 Water-oil plate cooler .............................................................................54

7.15.5 Water-oil tube cooler ..............................................................................54

7.15.6 Oil heater ...............................................................................................54

7.15.7 Electric motor  ........................................................................................55

7.15.8 Voltage equalization ...............................................................................56

8 Commissioning ................................................................................... 57

8.1 Before commissioning ............................................................................57

8.2 Filling up the system with hydraulic uid ...............................................57

8.3 Flushing before start up .........................................................................60

8.4 Initial start up procedure........................................................................61

8.5 Pump settings and adjustments..............................................................63

8.5.1 Variable displacement SP pump .............................................................63

8.5.2 Axial piston HD pump .............................................................................66

9 Maintenanceandrepair ...................................................................... 67

9.1 Maintenance log .....................................................................................67

9.2 Preventive maintenance  .........................................................................67

9.3 Filter change ...........................................................................................70

9.4 Inspection of hydraulic uid ...................................................................74

9.5 Air lter breather change ........................................................................75

9.6 Electric motor ......................................................................................... 76

9.6.1 Lubrication .............................................................................................76

9.6.2 Air inlet  .................................................................................................77

9.6.3 Draining  .................................................................................................77

9.7 Cooler ....................................................................................................77

9.7.1 Cleaning .................................................................................................77

9.7.2 Manual override of water valve ...............................................................78

9.8 Drive Unit out of service .........................................................................79

9.9 Repair .....................................................................................................80

9.10 Spare parts ............................................................................................81

10 Removalandreplacement................................................................... 82

10.1 Common .................................................................................................82

11 Disposal .............................................................................................. 83

11.1 Environmental protection .......................................................................83

12 Extensionandconversion ................................................................... 83

13 Troubleshooting .................................................................................. 84

14 Technicaldata ..................................................................................... 88

14.1 Weights ..................................................................................................88

15 DeclarationofIncorporation ............................................................... 90

RE 15325-WA, Version 02.2020, Bosch Rexroth AB

About this documentation | Hägglunds DUe Drive unit 5/92

1 About this documentation

1.1 Validity of the documentation

This documentation applies to the Drive Unit Hägglunds DUe and is intended for

machine/system manufactures, tters and service engineers.

This documentation contains important information required to transport,

install, commission, operate, use, service and dismantle the product safely and

professionaly.

▶Read this documentation completely before using the Hägglunds DUe

1.2 Required and additional documentations

▶ Before commissioning the product, make sure to have received and fully

understood the documentations identied by the book symbol and observe

the instructions included in these documentations.

Table 1: Required and additional documentations

Title Document number Document type

Order conrmation Contains the order-related

technical data for your

Hägglunds DUe.

Order conrmation

Order documentation Order specic E.g. hydraulic and electric

diagrams, bill of material,

specications

Hydraulic uid quick

reference

Hägglunds products

RE 15414 Data sheet

1.3 Presentation of information

Consistent safety instructions, symbols, terms and abbreviations are used in the

present documentation to facilitate orientation for the reader and to ensure safe

product handling. The explanations in the following sections will provide for easy

understanding.

6/92 Hägglunds DUe Drive unit | About this documentation

Bosch Rexroth AB, Version 02.2020, RE 15325-WA

1.3.1 Safety messages

This documentation includes safety messages placed before sequential operating

procedures that may involve the risk of personal or property damage. The

described precautionary measures must be observed.

Safety messages are structured as shown below:

SIGNALWORD

Type and source of risk

▶Consequences if disregarded

▶Precautionary measures

▶<listing>

• Warningsign: draws attention to the risk

• Signal word: identies the hazard level

• Type and source of risk: identies the type and source of the hazard

• Consequences: describes what occurs when the safety messages are of non

compliance type

• Precautions: indicates how the hazard can be avoided

Table 2: RiskcategoriestoANSIZ535.6-2006

Warningsign,signalword Meaning

DANGER Indicates a hazardous situation which, if not avoided, will

result in death or serious injury.

WARNING Indicates a hazardous situation which, if not avoided, could

result in death or serious injury.

CAUTION Indicates a hazardous situation which, if not avoided, could

result in minor or moderate injury.

NOTICE Indicates potential property damage: the product or the

environment may be damaged.

1.3.2 Symbols

The following symbols identify notices that are not safety-relevant, but enhance

the comprehensibility of the documentation.

Table 3: Meaning of the symbols

Symbol Meaning

When this information is not observed, optimum use or operation of the product

cannot be ensured.

▶ Single, independent step

1.

2.

3.

Numbered instructions:

The number indicates that the different steps are to be performed successively.

Center of gravity

Markings on packaging to indicate where the center of gravitiy are.

RE 15325-WA, Version 02.2020, Bosch Rexroth AB

Safety instructions | Hägglunds DUe Drive unit 7/92

2 Safety instructions

2.1 About this chapter

This product has been manufactured in strict compliance with the generally

accepted rules of technology. However, this does not exclude the risk of damage

to persons or property if this chapter and the safety instructions included in the

present documentation are not observed.

▶Read the entire documentation carefully before starting to use the product.

▶Keep this documentation in a location where it is accessible to all users at any

time.

▶ When passing over the product to third parties, make sure to include the

necessary documentation.

2.2 Intendeduse

The Hägglunds DUe is a hydraulic power unit.

In the application the Hägglunds DUe Drive Unit is classied as a partly completed

machinery in the sense of the EU machine directive 2006/42/EC. A partly

completed machinery is exclusively intended to form an incomplete or a complete

machine together with other components or partly completed machineries. The

Drive Unit may only be commissioned after it has been installed in the machine/

system for which it is intended and the safety of the entire system has been

established in accordance with the machine directive.

Intended use includes having read and understood the complete documentation,

especially the chapter 2: Safety instructions.

The product is intended for the following use:

• Create hydraulic ow in a closed loop hydraulic system

Special Drive Units

Standard Drive Units are not allowed to be used beside an ambient temperature of

-20 °C to 40 °C (-4 °F to 104 °F), or in areas with potentially explosive

atmospheres.

Drive Units intended for use in ambient temperature below 0 °C (32 °F), will be

tted with special optional equipment for preheating the hydraulic system before

start.

Drive Units intended for use in areas with potentially explosive atmospheres will

be tted with suitable components for use in such areas and manufactured in

accordance with valid rules and standards complying with ATEX-directives.

Observe the technical data, application and operating conditions and performance

limits as specied in the product-specic documentation and in the order

conrmation.

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Bosch Rexroth AB, Version 02.2020, RE 15325-WA

2.3 Improperuse

Any use other than that described as intended use shall be considered as

improper and is therefore impermissible.

Bosch Rexroth shall accept no liability whatsoever for damage resulting from

improper use. The user shall bear all risks arising from improper use.

Similarly, the following foreseeable faulty usages are also considered to be

improper:

• Using outside the operating parameters approved in the product-specic data

sheet or in the order conrmation (unless customer-specic approval has been

granted)

• Use of uids outside of the standards as specied in RE15414 Hydraulic fluid

quick reference.

• Modication of factory settings by non-authorized persons

• Use of add/on parts (e.g. mountable lter, control unit, valves) that are not

specied by Bosch Rexroth has to be approved by contact at Bosch Rexroth.

• Extension or conversion is not permissible and has to be approved by contact at

Bosch Rexroth.

• Using the Drive Unit in explosive environments unless the component or

machine/system has been certied as compliant with the local regulations.

• Using the Drive Unit in an aggressive atmosphere without necessary additional

measures.

2.4 Personnelqualications

The activities described in this documentation require basic mechanical, electrical

and hydraulic knowledge, as well as knowledge of the associated technical terms.

For transporting and handling the product, additional knowledge is necessary

with regard to working with a lifting device and the corresponding attachment

equipment. In order to ensure safe use, these activities may therefore only be

carried out by appropriate qualied personnel or an instructed person under the

direction and supervision of qualied personnel.

Qualied personnel are those who can recognize possible hazards and institute

the appropriate safety measures due to their professional training, knowledge, and

experience, as well as their understanding of the relevant regulations pertaining

to the work to be done. Qualied personnel must observe the rules relevant to the

subject area and have the necessary hydraulic, electric and automation knowledge.

Hydraulic knowledge means, for instance:

• Reading and fully understanding hydraulic diagram,

• Fully understanding in particular the interrelationships regarding safety devices

and having knowledge on the function and assembly of hydraulic components.

Electric knowledge means, for instance:

• Reading and fully understanding of electrical diagrams

• Certication for work with electrical equipment

Automation knowledge means, for instance:

• Reading and fully understanding of logic diagrams

• Knowledge of programmable equipment (PLC, VFD etc)

Bosch Rexroth offers training support for special elds. For more information

about training, please contact your Bosch Rexroth representative.

RE 15325-WA, Version 02.2020, Bosch Rexroth AB

Safety instructions | Hägglunds DUe Drive unit 9/92

2.5 General safety instructions

• Observe the regulations for accident prevention and environmental protection.

• Comply with the local safety provisions and regulations of the country in which

the product is used.

• Make sure to use Rexroth products in perfect working order.

• Strictly observe all instructions on the product.

• Persons, who assemble, operate, disassemble or maintain Rexroth products

must not consume any alcohol, drugs or pharmaceuticals that may affect their

ability to respond.

• Use exclusively accessories and spare parts explicitly approved by the

manufacturer to avoid accidents due to improper accessories and spare parts.

• Strictly observe the technical data and ambient conditions specied in the

product documentation.

• Inadequate products installed or used for safety-relevant applications may

produce unintended operating behavior and result in product or property

damage. For this reason, use a product in safety-relevant applications only on

condition that such use is specied and allowed in the corresponding product

documentation.

• Prior to commissioning the product, make sure that the end product (e.g.a

machine or line), into which Rexroth products are integrated, perfectly complies

with the country-specic provisions, safety regulations and standards applicable

to its use.

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Bosch Rexroth AB, Version 02.2020, RE 15325-WA

2.6 Productandtechnology-relatedsafetymessages

The safety instructions below apply to chapters 6: Transport and storage to 14:

Technical data

DANGER

Danger from suspended loads

Danger to life or risk of injury, damage to equipment.

Improper transportation may cause the Hägglunds Drive Unit to fall down lead to

injuries e.g. crushing or broken bones or damage to the product.

▶ Make certain that the forklift truck or lifting device has adequate lifting

capacity.

▶Never stand under or put you hands under suspended loads.

▶Ensure your position is stable during transportation.

▶Use your personal protective equipment (e.g. protective goggles, safety

gloves, suitable working clothes, safety shoes).

▶Use suitable lifting device for transport and storage, installation and for

removal and repair. Make sure the electric motor is well mounted or anchored

when the lifting device is disconnected.

▶ Observe the prescribed position of the lifting strap.

▶ Observe the national laws and regulations on work and health protection and

transportation.

Pressurized machine/system

Danger to life or risk of injury, serious injuries when working on machines/

systems not shutdown! Damage to equipment.

▶ Always lockout-tagout electric motors before maintenance.

▶Do not disconnect any line connections, ports and components when the

machine/system is pressurized.

▶Always ensure that no energy is accumulated before any measures.

▶Ensure that no pressure will enter the hydraulic system in the Drive Unit via

the hydraulic motor e.g. loads on the shaft or winch drum.

RE 15325-WA, Version 02.2020, Bosch Rexroth AB

Safety instructions | Hägglunds DUe Drive unit 11/92

WARNING

Escaping oil mist

Risk of explosion, re, health hazard, environmental pollution.

▶ Depressurize the machine/system and repair the leak.

▶ Keep open ames and ignition sources away from the Hägglunds Drive Unit.

High voltage

Danger to life or personal injury hazard through electrical shock.

▶Prior to accessing electrical parts with a voltage higher than 50 volts always

disconnect the device from the mains or power unit. Secure the electrical

equipment against being switched on again by accident.

▶ Observe the general deployment regulations and the safety regulations for

work on heavy-current equipment.

▶The operation, maintenance and/or repair of such equipment is reserved to

skilled personnel qualied to work on or with electrical equipment.

▶ Prior to switching the equipment on always check the protective earth

conductor for reliable connection to all electrical equipment according to the

connection diagram.

▶Exclusively run the component/device - even for short-time measurements or

tests - with the protective earth conductor reliably connected to the dedicated

connection points.

Dangerduetoincorrectmountingandsettingofelectrical,hydraulicand

mechanical functions as well as controls

Risk of personal injury or property damage.

▶Follow instructions for delivered equipment.

Rotating parts

Risk of injury or serious injuries.

▶ Do not touch rotating parts or in the zone of rotating parts.

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Bosch Rexroth AB, Version 02.2020, RE 15325-WA

CAUTION

High noise development in operation

Danger of hearing damage, deafness.

▶The noise emission of Hägglunds Drive Unit depends on speed, operating

pressure and installation conditions.

▶Always wear hearing protection when in the vicinity of the operating Drive

Unit.

Hot surfaces on the Drive Unit

Risk of burns.

▶ Allow the Hägglunds Drive Unit to cool down sufciently before touching it.

▶Wear heat-resistant protective clothing, e.g. gloves.

Improperroutingofcablesandlines

Tripping hazard and damage to equipment.

▶ Lay cables and lines so that they can not be damaged and nobody can trip

over them.

Contactwithhydraulicuid

Hazard to health/health impairment e.g. eye injuries, skin damage, toxication

during inhalation.

▶ Avoid contact with hydraulic uids.

▶ When working with hydraulic uids, strictly observe the safety instructions

provided by the lubricant manufacturer.

▶Use your personal protective equipment (e.g. protective goggles, safety

gloves, suitable working clothes, safety shoes).

▶ If hydraulic uid should, nevertheless, come into contact with your eyes or

bloodstream or is swallowed, consult a doctor immediately.

Escapinghydraulicuidduetomachine/systemleakage

Risk of burns and risk of injury due to escaping oil jet.

▶ Depressurize the machine/system and repair the leak.

▶ Never attempt to block or seal the leak or oil jet with a cloth.

Operatorerror

Risk of personal injury or damage to the product.

▶ Check both the general and the custom technical documentation to identify

the features of your unique Drive Unit

2.7 Personal protective equipment

Use personal protective equipment like helmet, protective goggles, safety shoes

and hearing protection.

The personal protective equipment is the responsibility of the user of the

Hägglunds Drive Unit. Observe the safety regulations and provisions of your

country.

All components of the Personal protective equipment must be in perfect condition.

RE 15325-WA, Version 02.2020, Bosch Rexroth AB

General notes regarding property damages and product damages | Hägglunds DUe Drive unit 13/92

3 General notes regarding property

damages and product damages

NOTICE

Danger from improper handling

Product can be damaged.

▶Do not expose the product to an impermissible mechanical load.

▶Never use the product as a handle or step.

▶Do not place/lay any objects on the product.

▶ Do not strike the Hägglunds Drive Unit or any part of it or its accessories.

▶ Do not strike ttings (e.g. sensors or valves).

▶ Do not strike sealing surfaces (e.g. service line ports).

▶ Leave the protective covers on the Hägglunds Drive Unit until shortly before

the lines are connected.

▶Do not perform electro-welding on the Hägglunds Drive Unit.

Damage to equipment due to improper lubrication

Product can be damaged or destroyed.

▶ Never operate the Hägglunds Drive Unit with insufcient hydraulic uid.

▶ When commissioning a machine/system, make sure that the case interior and

the service lines of the Hägglunds motor are lled with hydraulic uid and

remain lled during operation.

Mixingofhydraulicuids

Product can be damaged.

▶ Before installation, remove all uids from the Hägglunds motor to prevent

mixing with the hydraulic uid used in the machine/system.

▶ Any mixing of hydraulic uids of different manufacturers or different types of

the same manufacturer is not permissible in general.

Wrongvoltage

Electrical motor damage.

▶All electrical supply levels shall be within the limits that the equipment is

constructed for, see order specic Hägglunds DUe documentation and product

identication.

14/92 Hägglunds DUe Drive unit | General notes regarding property damages and product damages

Bosch Rexroth AB, Version 02.2020, RE 15325-WA

NOTICE

Contaminationofthehydraulicuid

The cleanliness of the hydraulic uid has a considerable impact on the

cleanliness and service life of the hydraulic system. Contamination of the

hydraulic uid could cause premature wear and malfunctions.

▶ Make sure that the working environment at the installation site is fully free

of dust and foreign substances in order to prevent contaminants, such as

welding beads or metal cuttings, from getting into the hydraulic lines and

causing product wear or malfunctions. The Hägglunds Drive Unit must be

installed in a clean condition.

▶Use only clean connections, hydraulic lines and attachments (e.g. measuring

equipment).

▶Keep the connections plugged as long as possible.

▶ Before commissioning, make sure that all hydraulic connections are tight and

that all of the connection seals and plugs are installed correctly to ensure

that they are leakproof and uids and contaminants are prevented from

penetrating the product.

▶ Use a suitable lter system to lter hydraulic uid during lling to minimize

solid impurities and water in the hydraulic system.

Impropercleaning

Product can be damaged.

▶Plug all openings with the appropriate protective equipment in order to

prevent detergents from entering the hydraulic system.

▶Never use solvents or aggressive detergents. Use only water and, if necessary,

a mild detergent to clean the Hägglunds Drive Unit.

▶Never use a high pressure washing system to clean inside the Drive Unit

▶For outside washing, do not point the power washer at sensitive

components,e.g. electrical connections and components.

▶Use lint-free cloths for cleaning.

Environmental pollution due to incorrect disposal

Careless disposal of the Hägglunds Drive Unit and its ttings, the hydraulic uid

and the packaging material could lead to pollution of the environment.

▶ Dispose of the Hägglunds Drive Unit, hydraulic uid and packaging in

accordance with the national regulations in your country.

▶ Dispose of the hydraulic uid in accordance with the applicable safety data

sheet for the hydraulic uid.

Escapingorspillinghydraulicuid

Environmental pollution and contamination of the ground water.

▶ Use an oil binding agent if hydraulic uid is spilled.

▶ Observe the information in the safety data sheet for the hydraulic uid and

the specications provided by the system manufacturer.

The warranty applies only to the delivered conguration.

The entitlement to warranty cover will be rendered void if the product is

incorrectly installed, commissioned or operated, or if it is used or handled

improperly.

RE 15325-WA, Version 02.2020, Bosch Rexroth AB

About this product | Hägglunds DUe Drive unit 15/92

1 Type code

2 Serial number

3 Weight

4 Manufacturer

5 Max pressure

Fig. 1: Product identication

4 Scope of delivery

Included in the delivery contents are:

• Hägglunds DUe as per order conrmation

5 About this product

5.1 Product description

The intention with the Drive Unit is to provide the hydraulic motor(s) with

the required ow of oil and pressure at the right time. All included parts are

assembled in a compact cabinet. The Drive Unit has one or more pumps driven by

one or more electric motors. The main pump is an axial piston pump with variable

displacement for closed loop systems. The electric motor is totally enclosed

(TEFC).

The standard control system to the Drive Unit is Hägglunds Spider, a small,

compact and congurable control system. It can health monitor the Drive Unit and

can control up to four pumps with a high variation of pre-programmed functions.

The Drive Unit is a very exible product with a wide option range. This makes

it possible to select a standard Drive Unit to full the features needed in many

different applications.

This installation and maintenance manual is intended to cover all standard options.

It may not cover all details on customized Drive Units and other control systems

than Hägglunds Spider, that differs from the standard Hägglunds DUe concept.

5.2 Productidentication

4

2

1

3

5

DD00057560

16/92 Hägglunds DUe Drive unit | About this product

Bosch Rexroth AB, Version 02.2020, RE 15325-WA

5.3 Main components

NOTE! Changes from the picture and the components may occur.

Fig. 2: Main components DUe

Oil lling

point

Accumulator

lling point

Thread size

.305-32 UNS

male

DD00072762

Oil pan

drain

1

4

7

3

2

15

Product

identication

11

13

9

10

17

12

Item Description Seealsogure Item Description Seealsogure

1 Electrical motor – 10 Oil cooler Fig. 3

2 Hydraulic pump – 11 Oil tank Fig. 4

3 Shaft coupling/bellhousing – 12 Replenishment (optional, not

shown in g.3)

–

4 Frame – 13 Filter –

5 Panels (not shown) – 14 Charge lter (not shown) –

6Top cover (not shown) – 15 Accumualator (optional) –

7Control system, Hägglunds spider – 16 Light (optional, not shown) –

8Control panel (at panel door, not shown) –17 Pressure sensors –

9 Oil heater (optional) – 18 Hoses, internal (not shown) –

RE 15325-WA, Version 02.2020, Bosch Rexroth AB

About this product | Hägglunds DUe Drive unit 17/92

Fig. 3: Oil cooler alternatives

Item Description

1 Air-oil cooler

2 Water-oil plate cooler

3 Water-oil tube cooler

NOTE!

Cooler is delivered as loose item.

1

23

DD00072991

1

18/92 Hägglunds DUe Drive unit | About this product

Bosch Rexroth AB, Version 02.2020, RE 15325-WA

Item Description

1Oil-level gauge

2Oil-drain valve

3Level and temperature sensor

4Air lter breather for tank bladder (optional)

5Air lter breather

6Suction valve

7 Oil heater

6

2

1

3

5

4

Fig. 4: Detailed view, tank DUe

DD00072316

7

RE 15325-WA, Version 02.2020, Bosch Rexroth AB

About this product | Hägglunds DUe Drive unit 19/92

5.4 Hydraulicuids

The Hägglunds hydraulic system is primarily designed for operation with hydraulic

uids according to ISO 11158 HM.

Fluids by the standards given in Table 4 are suggested. Before the start of project

planning, see data sheet RE 15414, Hydraulic uid quick reference, for detailed

information on hydraulic uids and specic additional demands.

Table 4: Suggesteduidtypes

ISO11158 ISO15380 ISO12922

Mineral oil based and

mineral oil related hydraulic

uids

Environmentally acceptable

hydraulic uids

Fire resistant hydraulic uids

Within these standards, not all fluid classes are allowed, some are recommen-

ded, and there are also additional demands (see data sheet RE 15414)

Detailsregardingtheselectionofhydraulicuid

The hydraulic uid should be selected such that the operating viscosity in

the temperature range, as measured in the motor housing, is within optimum

operation range, see Fig. 5. General recommendation is to have a system

temperature of 50°C, see dotted line in Fig. 5. A VG 68 uid will render just above

40 cSt at this point.

• Optimum viscosity range is 40 to 150 cSt.

• Running above 150 cSt or below 40 cSt results in reduced efciency.

• Running above 400 cSt results in substantial efciency loss.

• For pumps, the maximum start-up viscosity is 2000 cSt.

• For motors, starting at above 10000 cSt imparts unnecessary strain on parts.

• Running below 30 cSt may impact the service life.

• Running below 20 cSt may render instant seizure.

Fig. 5: Selection diagram for viscosity ranges with straight uids, i.e. viscosity index 100

Maximum viscosity at cold start

Minimum viscosity for short-term operation

Continuous operation

Optimal operation

Viscosity, ν[cSt]

20000

10000

5000

3000

2000

1000

600

400

300

200

150

100

60

50

40

30

20

14

-40

-30

-20

-10

0

10

20

30 40 50 60 70 80 90 100 110

(-40)

(-22)

(-4)

(14)

(32)

(50)

(68)

(86) (104) (122) (140) (158) (176) (194) (212) (230)

Temperature,t[°C

(°F)]

DD00073092

20/92 Hägglunds DUe Drive unit | About this product

Bosch Rexroth AB, Version 02.2020, RE 15325-WA

5.5 Requirementsforhydraulicuidcleanliness

The Drive Units are equipped with lters on the drain line and return line. In order

to obtain stated service life it is important to follow recommendations concerning

cleanliness levels and maintenance.

Cleanliness level recommendations

• The system must be ushed before start up (see section 4.12 Flushing before

start up).

• When lling the tank with hydraulic uid it is important to ll through the

dedicated oil lling connection (see 8.2: Filling up the system with hydraulic fluid).

• For industrial applications the contamination level should not exceed ISO

4406:1999 18/16/13.

• Have a water content of <200 ppm (0,02%).

• Always use lter elements recommended and supplied by Bosch Rexroth.

• The hydraulic uid should be analysed according to the maximum intervals on

the maintenance chart (see Table 15: Maintenace chart). Be particularly careful

when removing equipment for repairs or maintenance, dirt must not be allowed

to enter the system, clean prior to opening and plug open connections.

NOTICE

Dirt in oil

Damage on equipment.

▶ Do not re-use hydraulic uid which has leaked out.

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Bosch Rexroth RE15325-WA User manual

Bosch Rexroth RE15325-WA User manual

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