DGUV Information 209-071e - Safe maintenance of hydraulic systems (DGUV Informat...

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Abschnitt 4.8, 4.8 Filters
Abschnitt 4.8
Safe maintenance of hydraulic systems (DGUV Information 209-071)
Titel: Safe maintenance of hydraulic systems (DGUV Information 209-071)
Normgeber: Bund
Amtliche Abkürzung: DGUV Information 209-071
Gliederungs-Nr.: [keine Angabe]
Normtyp: Satzung

Abschnitt 4.8 – 4.8 Filters

Filtering the hydraulic fluid in a reliable manner is an imperative precondition for trouble-free function and long lifetimes of all hydraulic components and thus of the overall machine or system.

Filters have to be checked on a regular basis and replaced in accordance with the maintenance scheme or the clogging indicator. Figure 23 shows a filter unit with clogging indicator.


Fig. 22
Hydraulic accumulators


Fig. 23
Hydraulic filter with clogging indicator

string Note
The check and replacement intervals of the filter systems have to be observed!

When changing filters, the pressure reduction, the risk of scalding by hot hydraulic oil, the prevention of dirt and water entering the system, the condition of seals and system bleeding must be observed.

In case additional filters are installed at a later point in time, they have to be installed in an easily to be maintained manner outside of the danger areas and must meet the requirements of DIN EN ISO 4413 (e. g. clogging indicator).