9 - AHP Merkle GmbH

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4.8 General safety instructions
As a fundamental rule, only qualifi ed personnel may perform work on hydraulic cylinders.
Never open hydraulic systems that are pressurized.
Operating and maintenance instructions en
Hydraulic systems must be vented completely before being put into operation again or after maintenance work.
Dismantled parts and any hydraulic fl uid that has been collected or discharged must be disposed of properly.
When there is interaction between different hydraulic cylinders, it must be ensured that no forces or pressures
are added together unintentionally, which would lead to dangerous situations within the hydraulic system.
Hydraulic cylinders may never be subjected to transverse forces. Such forces can be absorbed by means of
special cylinder designs with additional external guides.
Any mechanical modifi cations to hydraulic cylinders require consultation with the manufacturer to ensure that they do not
cause any changes to the characteristics or operational limits of the cylinder.
Selected standards
DIN 24343: List for attendance and inspection of hydraulic equipments
DIN 24346: Hydraulic systems; general rules for application
DIN EN 982: Safety requirements for fl uid power systems and their components
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