Hydraulic fluids
The A7VO variable pump is designed for operation with HLP
mineral oil according to DIN 51524.
Application instructions and requirements for hydraulic
fluids should be taken from the following data sheets
before the start of project planning:
▶ 90220: Hydraulic fluids based on miner
al oils and
related hydrocarbons
▶ 90221: Envir
onmentally acceptable hydraulic fluids
▶ 90222: Fire-r
esistant, water-free hydraulic fluids
(HFDR/HFDU)
▶ 90223: Fire-r
esistant, water-containing hydraulic fluids
(HFC, HFB, HFAE, HFAS)
Details regarding the selection of hydraulic fluid
The hydraulic fluid should be selected such that the
operating viscosity in the operating temperature range is
within the optimum range (νopt, see selection diagram).
Note
At no point of the component may the temperature be
higher than 115 °C. The temperature difference specified in
the table is to be taken into account when determining the
viscosity in the bearing.
If it is not possible to maintain the conditions above due to
extreme operating parameters, we recommend flushing the
case at port U.
