Hydraulic Fluids; Series - Bosch Rexroth A2FM series Instruction Manual

Features of the ATEX version
With the ATEX version of the A2FM axial piston fixed motor,
a restriction of the technical data must to be taken into
account.
External distinguishing feature compared to the standard
motor is the grounding connection, which is marked by a
socket‑head screw on the mounting flange. Observe the
instruction manual.
Note
Potential equalization: The motor must be grounded via the
grounding connection (to be provided by the customer).
For grounding points, see the instruction manual (Part I,
91001‑01‑X‑B1) chapter 7.5 "Connecting potential
equalization".
Temperature classes according to EN 13463-1
Depending on the two temperature classes T3 and T4, the
maximum permissible speed and temperature restrictions
must be taken into account (see table "Viscosity and tem‑
perature of the hydraulic fluid" and "Technical data").
Axial piston fixed motor | A2FM for explosive areas

Hydraulic fluids

The fixed motor A2FM 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 mineral oils and
related hydrocarbons
The fixed motor A2FM for explosive areas is only approved
for mineral oils.
Notes on selection of hydraulic fluid
The hydraulic fluid should be selected such that the operat‑
ing viscosity in the operating temperature range is within
the optimum range (ν see selection diagram).
opt
The ignition temperature of the hydraulic fluid must be
greater than 250 °C.
Note
At no point of the component may the temperature be
higher than 90 °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 T /T .
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Project planning note
The maximum leakage temperature and case pressure must
not be exceeded. For this purpose, constant monitoring by
means of appropriate sensors in the system is necessary.
RE 91001-01-X-B2/01.2016, Bosch Rexroth AG
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Hydraulic fluids