40/56 Commissioning
Bosch Rexroth AG
, A2FM/A2FE/A2FMT Series 70, RE 91071-01-B/06.2018
8.1.1 Filling the axial piston unit
Professional filling and air bleeding is necessary to prevent damage to the axial
piston unit and to maintain proper function.
Usually, the cleanliness level of commercial hydraulic fluids is insufficient for our
components. These hydraulic fluids must be filtered using an appropriate filter
system to minimize solid particle contamination and water in the system.
Use only a hydraulic fluid that conforms to the following requirements:
You can find details of the min. requirements on hydraulic fluids in Bosch Rexroth
data sheets 90220 and 90221. The titles of the data sheets can be found in Table 1
“Required and supplementary documentation” on page 5. You can find details of
permissible and optimal viscosity in data sheets 91071 and 91072.
To ensure the functional reliability of the axial piston unit, the hydraulic fluid must
have a min. cleanliness level of 20/18/15 as defined in ISO 4406. At a hydraulic fluid
viscosity of less than 10 mm²/s (e.g. due to high temperatures during short-term
operation) at the drain port, a min. cleanliness level of 19/17/14 as defined in
ISO 4406 is required. For permissible viscosities and temperatures, see data sheets
91071 and 91072.
1.
Place a drip tray under the axial piston unit to collect any hydraulic fluid that may
leak.
nOTICE! Contaminated hydraulic fluid!
The cleanliness levels of commercial hydraulic fluid are usually insufficient for our
components.
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Use a suitable filter system to filter hydraulic fluids during filling to minimize solid
impurities and water in the hydraulic system.
2.
Fill and air bleed the axial piston unit using the appropriate ports; see chapter 7.3
“Installation position” on page 26. Also fill the hydraulic lines of the system.
nOTICE! Risk of property damage due to inadequate lubrication!
Product can be damaged or destroyed!
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When using a shut-off valve in the drain line, make sure that the drive of the axial
piston unit can only be started when the shut-off valves are open.
3.
When using a shut-off valve in the drain line, only operate the axial piston unit
when the shut-off valves are open.
