Bosch Rexroth 10 Series User manual

Instruction manual
RE 91485-01-B/2021-11-18, EN
Axial piston units
for variable-speed drives
A10FZO, A10VZO, A10FZG and A10VZG
series 10

© BoschRexrothAG2021. All rights reserved,
also regarding any disposal, exploitation,
reproduction, editing, distribution, as well
as in the event of applications for industrial
property rights.
The data specified within only serves
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 verification. It must be
remembered that our products are subject to
anatural process of wear and aging.
The cover shows an example application.
The product delivered may differ from the
image on the cover.
The original instruction manual was created
in German.

RE 91485-01-B/2021-11-18, BoschRexrothAG
Contents | A10FZO, A10VZO, A10FZG and A10VZG series 10 3/72
1 About this documentation ������������������������������������������������������������������������ 5
1.1 Validity of the documentation ...................................................................... 5
1.2 Required and supplementary documentation............................................... 5
1.3 Representation of information...................................................................... 6
1.3.1 Safety instructions ....................................................................................... 6
1.3.2 Symbols ....................................................................................................... 6
1.3.3 Designations ................................................................................................ 7
1.3.4 Abbreviations ............................................................................................... 7
2 Safety instructions ����������������������������������������������������������������������������������� 8
2.1 About this chapter........................................................................................ 8
2.2 Intended use ................................................................................................ 8
2.3 Improper use................................................................................................ 8
2.4 Personnel qualifications ............................................................................... 9
2.5 General safety instructions ........................................................................ 10
2.6 Product-specific safety instructions ........................................................... 11
2.7 Personal protective equipment................................................................... 14
3 General instructions on property damage and product damage�������������� 15
4 Scope of delivery������������������������������������������������������������������������������������ 18
5 About this product ��������������������������������������������������������������������������������� 20
5.1 Performance description............................................................................ 20
5.2 Product description ................................................................................... 20
5.2.1 Axial piston unit layout............................................................................... 21
5.2.2 Functional description ............................................................................... 22
5.3 Product identification................................................................................. 24
5.4 Direction of rotation and pin assignment A10FZO...................................... 24
5.5 Flow direction A10VZO............................................................................... 25
5.6 Flow direction A10FZG and A10VZG .......................................................... 25
6 Transport and storage ���������������������������������������������������������������������������� 26
6.1 Transporting the axial piston unit............................................................... 26
6.1.1 Transport by hand ...................................................................................... 27
6.1.2 Transport with lifting devices..................................................................... 27
6.2 Storing the axial piston unit ....................................................................... 28
7 Installation��������������������������������������������������������������������������������������������� 31
7.1 Unpacking .................................................................................................. 31
7.2 Installation conditions................................................................................ 31
7.3 Installation position A10FZO, A10VZO........................................................ 33
7.3.1 Below-reservoir installation (standard) ...................................................... 33
7.3.2 Inside-reservoir installation........................................................................ 34
7.3.3 Above-reservoir installation........................................................................ 36
7.4 Installation position A10FZG, A10VZG ....................................................... 38
7.4.1 Below-reservoir installation (standard) ...................................................... 38
7.4.2 Above-reservoir installation........................................................................ 40
7.5 Installing the axial piston unit.................................................................... 41
7.5.1 Preparation ................................................................................................ 41
7.5.2 Dimensions ................................................................................................ 42
7.5.3 General instructions................................................................................... 42
7.5.4 Installation with acoupling ........................................................................ 42
7.5.5 Remove the spacer (for version with through drive)................................... 43
7.5.6 Completion of assembly............................................................................. 44
Contents

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BoschRexrothAG, RE 91485-01-B/2021-11-18
7.5.7 Hydraulically connecting the axial piston unit............................................ 45
7.5.8 Electrically connecting the axial piston unit............................................... 52
7.6 Performing flushing cycle ........................................................................... 53
8 Commissioning��������������������������������������������������������������������������������������� 54
8.1 Initial commissioning ................................................................................. 54
8.1.1 Filling the axial piston unit......................................................................... 54
8.1.2 Testing the hydraulic fluid supply............................................................... 56
8.1.3 Performing afunctional test....................................................................... 56
8.2 Running-in phase ....................................................................................... 57
8.3 Recommissioning after standstill ............................................................... 57
9 Operation ����������������������������������������������������������������������������������������������� 58
10 Maintenance and repair�������������������������������������������������������������������������� 58
10.1 Cleaning and care ...................................................................................... 58
10.2 Inspection .................................................................................................. 58
10.3 Maintenance............................................................................................... 59
10.4 Repair ........................................................................................................ 59
10.5 Spare parts ................................................................................................ 60
11 Removal and replacement ���������������������������������������������������������������������� 61
11.1 Required tools............................................................................................ 61
11.2 Preparing for removal................................................................................. 61
11.3 Performing the removal.............................................................................. 61
11.4 Preparing the components for storage or further use................................. 61
12 Disposal ������������������������������������������������������������������������������������������������� 62
13 Extension and conversion����������������������������������������������������������������������� 63
14 Troubleshooting ������������������������������������������������������������������������������������� 64
14.1 How to proceed for troubleshooting........................................................... 64
14.2 Malfunction table ....................................................................................... 65
15 Technical data ���������������������������������������������������������������������������������������� 69
16 Alphabetical index ��������������������������������������������������������������������������������� 70

RE 91485-01-B/2021-11-18, BoschRexrothAG
About this documentation | A10FZO/G, A10VZO/G 5/72
1 About this documentation
1�1 Validity of the documentation
This documentation applies to the following products:
• Axial piston units A10FZO, A10VZO, A10FZG and A10VZG series 10
(standard version)
This documentation is intended for machine/system manufacturers, assemblers
and service engineers.
This documentation contains important information on the safe and proper
transport, assembly, commissioning, operation, maintenance, removal and simple
troubleshooting of the axial piston unit.
▶ Read this documentation completely, in particular chapter 2 "Safety
instructions" on page 8 and chapter 3 "General instructions on property
damage and product damage" on page 15 before you start work with the axial
piston unit.
1�2 Required and supplementary documentation
▶ Only commission the axial piston unit if the documentation marked with the
book symbol is available to you and you have understood and observed it.
Tabelle 1: Required and supplementary documentation
Title Document number Document type
Order confirmation
Contains the order-related technical data for your axial piston unit
A10FZO, A10VZO, A10FZG and A10VZG
– Order confirmation
Installation drawing
Contains the outer dimensions, all connections and the hydraulic circuit
diagram for your axial piston unit A10FZO, A10VZO, A10FZG and A10VZG.
Please request the
installation drawing
from your contact at
BoschRexroth.
Installation drawing
Axial piston units A10FZO, A10VZO, A10FZG and A10VZG
Contains the permissible technical data, ports, main dimensions and circuit
diagrams of standard versions.
91485 Data sheet
Hydraulic fluids based on mineral oils and related hydrocarbons
Describes the requirements for mineral oil-based hydraulic fluids and related
hydrocarbons for operation with Rexroth hydraulic components and provides
support for selection of suitable hydraulic fluids for the hydraulic system.
90220 Data sheet
BoschRexroth Fluid Rating List for Rexroth hydraulic components
(pumps and motors)
Contains the hydraulic fluids positively evaluated by BoschRexroth.
90245 Data sheet
Information on the application of hydrostatic drives at low temperatures
Contains additional information on the application of Rexroth axial piston units
at low temperatures.
90300-03-B Manual
Storage and preservation of axial piston units
Contains additional information on storage and preservation.
90312 Data sheet

BoschRexrothAG, RE 91485-01-B/2021-11-18
6/72 A10FZO, A10VZO, A10FZG and A10VZG series 10 | About this documentation
1�3 Representation of information
Uniform safety instructions, symbols, terms and abbreviations are used throughout
this documentation to ensure safe and proper use of the product. For clarification,
they are explained in the sections below.
1�3�1 Safety instructions
This documentation contains safety instructions in chapter2.6 "Product-specific
safety instructions" on page11 and in chapter3 "General instructions on
property damage and product damage" on page15, as well as before asequence
of actions or an instruction for action involving arisk of personal injury and
property damage. Always follow the measures for danger prevention associated
with the use of this product.
Safety instructions are set out as follows:
SIGNAL WORD
Type and source of danger!
Consequences of non-compliance
▶ Danger prevention measures
•Warning sign: draws attention to the danger
•Signal word: identifies the degree of the danger
•Type and source of danger: indicates the type and source of the danger
•Consequences: describes the consequences of non-compliance
•Precautions: states how the danger can be avoided
Tabelle 2: Hazard classes as defined in ANSI Z535�6
Warning sign, signal word Meaning
DANGER Identifies adangerous situation that will result in death or
serious injury if it is not avoided.
WARNING Identifies adangerous situation that may result in death or
serious injury if it is not avoided.
CAUTION Identifies adangerous situation that may result in minor to
moderate injury if it is not avoided.
NOTICE Property damage: The product or surrounding area may be
damaged.
1�3�2 Symbols
The following symbols indicate notices that are not safety-relevant but increase
understanding of the documentation.

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About this documentation | A10FZO/G, A10VZO/G 7/72
Tabelle 3: Meaning of symbols
Symbol Meaning
If this information is disregarded, the product cannot be used and/or
operated to its full extent.
▶ Single, independent action
1�
2�
3�
Numbered instruction:
The numbers indicate that the actions must be completed in order.
1�3�3 Designations
This documentation uses the following designations:
Tabelle 4: Designations
Designation Meaning
A10FZO Axial piston fixed displacement unit, open circuit
A10VZO Axial piston variable displacement unit, open circuit
A10FZG Axial piston fixed displacement unit, open and closed circuit
A10VZG Axial piston variable displacement unit, open and closed circuit
Threaded plug Metal screw, pressure-resistant
Protective plug Made out of plastic, not pressure-resistant, only for transportation
As ageneric term for "axial piston units for variable-speed drives
A10FZO, A10VZO, A10FZG and A10VZG", the designation "axial piston unit" will be
used hereinafter.
1�3�4 Abbreviations
This documentation uses the following abbreviations:
Tabelle 5: Abbreviations
Abbreviation Meaning
ANSI American National Standards Institute is an organization that coordinates
the development of voluntary standards in the United States
ATEX EC directive on explosion protection (Atmosphère explosible)
DIN Deutsches Institut für Normung (German Institute for Standardization)
DG Two-point control, directlycontrolled
DR Druckregler (pressure controller), hydraulic
EZ Two point control electric
ISO International Organization for Standardization
JIS Japan Industrial Standard
LA Torque controller
RE Rexroth document in the English language
VDI2230 Guideline for the systematic calculation of heavy-duty
threaded connections and cylindrical screw joints from the
VDI(VereinDeutscherIngenieure - Association of German Engineers)

BoschRexrothAG, RE 91485-01-B/2021-11-18
8/72 A10FZO, A10VZO, A10FZG and A10VZG series 10 | Safety instructions
2 Safety instructions
2�1 About this chapter
The axial piston unit has been manufactured to generally accepted engineering
standards. There is still, however, arisk of personal injury or property damage if
this chapter and the safety instructions in this documentation are not observed.
▶ Read this documentation completely and thoroughly before working with the
axial piston unit.
▶ Keep this documentation in alocation where it is accessible to all users
at all times.
▶ Always include the required documentation when you pass the axial piston unit
on to third parties.
2�2 Intended use
Axial piston units are hydraulic components, meaning that in their application area
they are classified neither as complete nor as partly completed machinery in the
sense of the EC Machinery Directive 2006/42/EC. The component is exclusively
intended to form partly completed machinery or complete machinery together
with other components. The component should 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 Machinery Directive.
This product is intended for the following use:
The A10FZG axial piston unit is only approved for hydrostatic, variable-speed
drives in open and closed hydraulic circuits.
The A10VZG axial piston unit is only approved for hydrostatic, variable-speed
drives in open and closed hydraulic circuits.
The A10FZO and A10VZO axial piston units are only approved for hydrostatic,
variable-speed drives in open hydraulic circuits.
▶ Observe the technical data, the application and operating conditions and
the performance limits as specified in the data sheet 91485 and in the order
confirmation. Information about approved hydraulic fluids can be found in
data sheet 91485.
The axial piston unit is only intended for commercial use and not for private use.
Intended use includes having fully read and understood this documentation,
especially chapter 2 "Safety instructions" on page 8.
2�3 Improper use
Any use other than that described as intended use is considered improper.
BoschRexrothAG is not liable for damage resulting from improper use. The user is
solely responsible for any risks arising from improper use.
The following foreseeable forms of faulty usage are also considered improper
(this list is not exhaustive):
• Use outside the operating parameters approved in the data sheet and in the order
confirmation (unless specifically approved by the customer)
• Use of non-approved fluids, e.g.water or polyurethane components
• Changes to factory settings by unauthorized persons
• Use of assembled parts (e.g.attachment filter, control unit, valves) other than
specified Rexroth components

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Safety instructions | A10FZO/G, A10VZO/G 9/72
• Use of the axial piston unit with assembled parts under water at adepth of
more than 10 meters without the necessary additional measures, e.g.pressure
equalization. Units with electrical components (e.g.sensors) must not get
into contact with water, depending on the IP protection class. Observe the IP
protection class of the relevant product in data sheet 91485. Axial piston units
may only be used on acase-by-case basis for this application.
• The maximum permissible case pressure specified in the data sheet must not be
exceeded.
• Application of the axial piston unit in explosive environments unless the
component or machine/system has been certified as compliant with the
ATEX Directive 2014/34/EU
• Use of the axial piston unit in acorrosive atmosphere
• Use of the axial piston unit in aircraft or spacecraft
2�4 Personnel qualifications
The activities described in this documentation require abasic understanding
of mechanics, electricity and hydraulics, as well as familiarity with associated
technical terms. For transporting and handling the product, knowledge regarding
the use of lifting devices and lifting accessories is required. In order to ensure
safe use, these activities should only be performed by skilled personnel or an
instructed person under the direction and supervision of skilled personnel.
Skilled personnel refers to persons who possess the professional training,
knowledge and experience, as well as the understanding of the regulations
relevant to the work to be done that are necessary to recognize possible dangers
and take the appropriate safety measures. Skilled personnel must follow the rules
relevant to their field and have the necessary hydraulic expert knowledge.
Hydraulic expert knowledge includes:
• Being able to read and fully understand hydraulic circuit diagrams
• In particular, fully understanding the relationships with regard to safety devices
• Knowledge regarding the function and interaction of hydraulic components.
BoschRexroth offers training support for specialized fields. You can find an
overview of the training contents on the Internet at:
www.boschrexroth.com/training.

BoschRexrothAG, RE 91485-01-B/2021-11-18
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2�5 General safety instructions
• Observe the country-specific accident prevention and environmental protection
regulations.
• Observe the safety regulations of the country in which the product is used/
operated.
• Use Rexroth products only when they are in good working order.
• Observe all notices on the product.
• Do not assemble, operate, remove or maintain Rexroth products if under the
influence of alcohol, drugs or medication that may affect your reaction time.
• Only use genuine Rexroth accessories and spare parts to ensure there is no
hazard to persons from unsuitable spare parts.
• Observe the technical data and ambient conditions specified in the product
documentation.
• If unsuitable products are installed or used in safety-relevant applications,
unexpected operating conditions may occur in the application, which could result
in personal injury or property damage. For this reason, only use the product in
safety-relevant applications if this use is expressly indicated and approved in the
product documentation, e. g.in explosion protection areas or in safety-related
parts of acontrol system (functional safety).
• Only commission the product if it has been determined that the end product
(e.g.machinery/system) in which the Rexroth products are installed complies
with the country-specific provisions, safety regulations and standards for the
application.
• Use tools appropriate for the work being performed and wear appropriate
protective clothing to prevent punctures and cuts (e.g.when removing protective
covers, disassembly).
• There is arisk of entanglement when operating the axial piston unit with
abare shaft end. Check whether or not your machine requires additional safety
measures for your application. If necessary, make sure these are appropriately
implemented.
• Depending on the type of control used, electromagnetic effects can be produced
when using solenoids. Applying adirect voltage signal (DC) to solenoids does not
create electromagnetic interference (EMI) nor is the solenoid affected by EMI.
Potential electromagnetic interference (EMI) exists if the solenoid is energized
with amodulated direct current (e.g.PWM signal). The machine manufacturer
should conduct appropriate tests and take appropriate measures to ensure
that other components or operators (e.g.with apacemaker) are not affected by
this potentiality.

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Safety instructions | A10FZO/G, A10VZO/G 11/72
2�6 Product-specific safety instructions
The following safety instructions apply to chapters 6 to 14.
WARNING
Danger due to excessive pressure!
Risk of death or injury, or property damage!
Improperly changing the factory pressure settings can result in apressure
increase beyond the permissible maximum pressure.
Operating the unit above the maximum permissible pressure can cause
components to burst and hydraulic fluid to escape under high pressure.
▶ Changes to the factory settings may only be made by BoschRexroth
specialists.
▶ In addition, apressure relief valve is required in the hydraulic system as
back-up. If the axial piston unit is equipped with apressure cut-off and/or
pressure controller, this is not an adequate safeguard against pressure overload.
Danger due to suspended loads!
Risk of death or injury, or property damage!
Improper transportation may cause the axial piston unit to fall down and lead to
injury, e.g.crushing or fracture, or damage to the product.
▶ Make sure that the load bearing capacity of the lifting device is sufficient to
safely bear the weight of the axial piston unit.
▶ Never step or grip under suspended loads.
▶ Ensure astabletransport position.
▶ Use your personal protective equipment (e.g.safety goggles, safety gloves,
suitableworking clothes, safety shoes).
▶ Use suitablelifting devices for transport.
▶ Observe the prescribed position of the lifting strap.
▶ Observe the national laws and regulations on occupational health and safety,
and transportation.

BoschRexrothAG, RE 91485-01-B/2021-11-18
12/72 A10FZO, A10VZO, A10FZG and A10VZG series 10 | Safety instructions
WARNING
System/machine under pressure!
Risk of death or serious injury when working on unsecured machines/systems!
Property damage!
▶ Switch off the relevant machine/system part and secure it against reactivation
according to the parameters by the machine/system manufacturer.
▶ Ensure that all relevant components of the hydraulic system are depressurized.
For this purpose, observe the parameters indicated by the machine/system
manufacturer.
▶ Please note that the hydraulic system might still be pressurized even after
separation from the actual pressure supply.
▶ Do not disconnect any line connections, ports or components as long as the
hydraulic system is under pressure.
Escaping hydraulic fluid mist!
Risk of explosion and fire hazard, health hazard, risk of environmental pollution!
▶ Depressurize the relevant machine/system component and repair the leak.
▶ Only perform welding work when the machine/system is depressurized.
▶ Keep open flames and ignition sources away from the axial piston unit.
▶ If axial piston units are located in the vicinity of ignition sources or powerful
thermal radiators, ashield must be erected to ensure any escaping hydraulic
fluid cannot be ignited, and to protect hose lines from premature aging.
Escaping hydraulic fluid due to leakage of machine/system components!
Risk of burning and risk of injury due to escaping hydraulic fluid jet!
In case of leakage at the axial piston unit, high-pressure fluid jets may escape.
▶ Depressurize the relevant machine/system component and repair the leak.
▶ Never attempt to block or seal the leak or hydraulic fluid jet with acloth.
Hydraulic fluid will explode when making contact with water!
Explosion and fire hazard!
▶ Do not bring hot hydraulic fluids in contact with water.
Electrical voltage!
Danger to life or risk of injury due to electric shock or property damage!
▶ Always disconnect the voltage supply to the relevant machine/system
part before installing the product and/or connecting or disconnecting the
connector. Protect the machine/system against being re-energized.

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Safety instructions | A10FZO/G, A10VZO/G 13/72
WARNING
Restriction of control function!
Risk of injury or property damage!
Under certain circumstances, moving parts in control equipment (e.g., valve spools)
can get stuck in an undefined position due to contamination (e.g., impure hydraulic
fluid, abrasion or residual dirt from components). As aresult, the hydraulic fluid
flow and the build-up of torque in the axial piston unit can no longer respond
correctly to the operator’s specifications. Even the use of various filter elements
(external or internal flow filtration) will not rule out afault but merely reduce the
risk.
▶ Check whether your application requires remedial measures on your machine
in order to bring the driven consumer to asafe position (e.g.safe stop).
▶ If necessary, make sure these are appropriately implemented.
CAUTION
High noise development during operation!
Risk of hearing damage or hearing loss!
The noise emission of axial piston units depends on rotational speed,
working pressure and installation conditions, among other factors. The sound
pressure level may rise above 70 dB (A) in certain application conditions.
▶ Always wear hearing protection near arunning axial piston unit.
Hot surfaces on axial piston unit!
Risk of getting burnt!
▶ Allow the axial piston unit to cool down sufficiently before touching it.
▶ Wear heat-resistant, protective clothing, e.g.gloves.
Improper cable and line routing!
Risk of stumbling and property damage! Improper routing of cables and lines
can cause arisk of stumbling as well as damage to equipment and components,
e.g.due to lines and connectors being torn off.
▶ Always install cables and lines in away that nobody can fall over them,
that they are not bend or twisted, do not chafe on edges and are not guided
through ducts with sharp edges without sufficient protection.
Incorrectly connected suction and pressure lines!
Risk of injury and property damage!
▶ Make sure that the corresponding suction and pressure port is assigned
to the correct direction of rotation. Information on this can be found in
data sheet 91485 and in Tabelle 7 to Tabelle 9 "Flow direction" starting on
page24.

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14/72 A10FZO, A10VZO, A10FZG and A10VZG series 10 | Safety instructions
CAUTION
Contact with hydraulic fluid!
Risk of adverse health effects, e.g.eye injury, skin irritation, toxication from
inhalation!
▶ Avoid any contact with hydraulic fluids.
▶ When handling hydraulic fluids, the safety instructions of the lubricant
manufacturer need to be observed at all times.
▶ Use your personal protective equipment (e.g.safety goggles, safety gloves,
suitableworking clothes, safety shoes).
▶ Immediately seek medical attention, however, if hydraulic fluid gets into your
eyes or blood circuit or if you swallow it accidentally.
Danger from improper handling!
Slip hazard! Risk of slipping on wet surfaces when climbing on the axial piston
unit.
▶ Never grab or climb onto the axial piston unit.
▶ Check how to safely get on top of the machine/system.
2�7 Personal protective equipment
Personal protective equipment is the responsibility of the user of the axial piston
unit. Observe the safety regulations in your country.
All pieces of personal protective equipment should be intact.

RE 91485-01-B/2021-11-18, BoschRexrothAG
General instructions on property damage and product damage | A10FZO/G, A10VZO/G 15/72
3 General instructions on property
damage and product damage
The following notices apply to chapters 6 to 14.
NOTICE
Danger from improper handling!
Product can be damaged!
▶ Do not subject the product to improper mechanical loads.
▶ Never use the product as handle or step.
▶ Do not put/place any objects on the product.
▶ Do not strike the drive shaft of the axial piston unit.
▶ Do not set/place the axial piston unit on the drive shaft or assembled parts.
▶ Do not strike assembled parts (e.g.sensors. solenoids or valves).
▶ Do not hit sealing surfaces (e.g.on the work connections).
▶ Leave the protective covers on the axial piston unit until you connect the lines.
▶ Disconnect all electrical connectors before arc welding and painting
operations.
▶ Make sure the electronic components (e.g.sensors) do not build up
electrostatic charges (e.g.during painting).
Risk of property damage due to inadequate lubrication!
Product can be damaged or destroyed!
▶ Never operate the axial piston unit with insufficient hydraulic fluid.
Specifically, make sure that the rotary group has sufficient lubrication.
▶ When commissioning amachine/system, make sure that the housing area
and the working lines of the axial piston unit are filled with hydraulic fluid
and remain filled during operation. Avoid air inclusions in the forward
drive shaft bearing, especially with the axial piston unit installed with the
drive shaft upward.
▶ Check the hydraulic fluid level in the housing area regularly and replenish,
if necessary. For above-reservoir installation, the housing area may drain out
through the drain line after prolonged standstill periods (air enters through
the shaft seal) or through the working line (gap leakage). This means the
bearings are insufficiently lubricated when the system is turned on.
▶ Make sure the suction line is always filled with hydraulic fluid during
commissioning and operation.
▶ With above-reservoir installation, an axial piston unit must be moved to full
swivel angle after no more than three seconds during commissioning and
recommissioning. Make sure that the axial piston unit really does suck in
hydraulic fluid and build up pressure.

BoschRexrothAG, RE 91485-01-B/2021-11-18
16/72 A10FZO, A10VZO, A10FZG and A10VZG series 10 | General instructions on property damage and product damage
NOTICE
Mixing hydraulic fluids!
Product can be damaged!
▶ Before installation, remove all fluids from the axial piston unit to prevent
mixing with the hydraulic fluid used in the machine/system.
▶ Any mixture of hydraulic fluids of different manufacturers and/or different
types of the same manufacturer is generally not permissible.
Contamination of hydraulic fluid!
The cleanliness of the hydraulic fluid impacts the service life of the axial piston
unit. Contamination of the hydraulic fluid may lead to premature wear and
malfunctions!
▶ Always ensure awork environment in the assembly location that is free from
dust and foreign particles to prevent foreign particles, e.g.welding beads
or metal cuttings, from entering the hydraulic lines and lead to wear and
malfunctions in the product. The axial piston unit should be clean when
installed.
▶ Only use clean ports, hydraulic lines and assembled parts
(e.g.measuring devices).
▶ When plugging the ports, no contamination must ingress.
▶ Before commissioning, ensure that all hydraulic connections are tight and
that all seals and plugs of the plug-in connection are correctly installed and
undamaged to prevent fluids and foreign particles from entering the product.
▶ Filter the hydraulic fluid when filling the system with asuitablefilter system to
minimize the solid particle contamination and water in the hydraulic system and
to achieve the required cleanliness level.
Improper cleaning!
Product can be damaged!
▶ Plug all openings with appropriate protective covers in order to prevent cleaning
agents from entering the axial piston unit.
▶ Never use solvents or aggressive cleaning agents. Use only water and,
if necessary, amild cleaning agent to clean the axial piston unit.
▶ Do not point ahigh-pressure cleaner at sensitive components, e.g.shaft seal,
electrical connections and components.
▶ Use fiber-free cleaning cloth.
Environmental pollution due to improper disposal!
Careless disposal of the axial piston unit and its assembled parts, the hydraulic
fluid and the packaging material can cause environmental pollution!
▶ Dispose of the axial piston unit, hydraulic fluid and packaging in accordance
with the regulations in your country.
▶ Dispose of the hydraulic fluid in accordance with the applicable
safety data sheet for the hydraulic fluid.

RE 91485-01-B/2021-11-18, BoschRexrothAG
General instructions on property damage and product damage | A10FZO/G, A10VZO/G 17/72
NOTICE
Danger from chemical or corrosive environmental conditions!
Product can be damaged! If the axial piston unit is exposed to chemical or
corrosive environmental conditions, such as sea water, fertilizer or road salt,
it can result in corrosion or, in extreme cases, malfunction. Leaks may lead to
leakage of hydraulic fluid.
▶ Take appropriate measures to protect the axial piston unit from chemical or
corrosive environmental conditions.
Leakage or spilling of hydraulic fluid!
Risk of environmental pollution and contamination of ground water!
▶ Always place adrip tray under the axial piston unit when filling and draining
hydraulic fluid.
▶ Use asuitable binding agent to collect any leaked hydraulic fluid.
▶ Observe the parameters in the safety data sheet for the hydraulic fluid and the
specifications provided by the machine/system manufacturer.
Danger from hot components!
Nearby products can be damaged! Components which heat up (e.g.,solenoids)
can cause damage to nearby products if they are too close during installation.
▶ When installing the axial piston unit, check the safety distances to nearby
products to ensure that they are not damaged.
The warranty only applies to the machine configuration as delivered.
The warranty will be voided if the product is incorrectly installed, commissioned or
operated, or if it is used or handled improperly.

BoschRexrothAG, RE 91485-01-B/2021-11-18
18/72 A10FZO, A10VZO, A10FZG and A10VZG series 10 | Scope of delivery
4 Scope of delivery
2
3
4
1
1
Abb� 1: Axial piston unit A10FZO
3
1
1
2
2
4
Abb� 2: Axial piston unit A10VZO
2
3
4
1
1
Abb� 3: Axial piston unit A10FZG

RE 91485-01-B/2021-11-18, BoschRexrothAG
Scope of delivery | A10FZO/G, A10VZO/G 19/72
12
1
Abb� 4: Axial piston unit A10VZG
Included in the scope of delivery:
• Axial piston unit as per order confirmation
The following parts come assembled on the unit:
• Protective covers (1)
• Protective plug/threaded plugs(2)
• For version with through drive, protective cover incl. mounting bolts (3)
• Transport protection for the through drive (4)

BoschRexrothAG, RE 91485-01-B/2021-11-18
20/72 A10FZO, A10VZO, A10FZG and A10VZG series 10 | About this product
5 About this product
5�1 Performance description
Axial piston units convert mechanical rotation into hydrostatic flow and controls
or regulates it. They have been designed for the variable-speed drive with
synchronous and asynchronous motors.
Refer to data sheet 91485 and the order confirmation for the technical data,
operating conditions and application limits of the axial piston unit.
5�2 Product description
The axial piston unit is available as the standard version A10FZO, A10VZO for
open circuit. The A10FZG and A10VZG are available for open and closed circuits.
Both versions are equipped with an axial piston rotary group in swashplate design
for hydrostatic drives. In axial piston units with swashplate design, the pistons
are arranged axially relative to the drive shaft. The cylinder and drive shaft are
interlocked. The specific torque and flow can be changed by controlling the cradle.
In an open circuit, the hydraulic fluid flows from the reservoir to the axial piston
unit and from there it is fed to the consumer, e.g.hydraulic cylinder. From the
consumer, the hydraulic fluid flows directly back to the reservoir. The direction of
movement of the hydraulic cylinder can be changed e.g.by means of a directional
valve.
In the closed circuit, the hydraulic fluid flows from the axial piston unit to the
consumer, e.g.hydraulic cylinder, and from there directly back to the axial piston
unit.
There is ahigh-pressure side and alow-pressure side which alternate depending
on which side is under load.
Open circuit
Closed circuit