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Commissioning | A4... with HS5E(V)(L) control system Series 1x and 30
8.1 Initial commissioning
During all work on commissioning the axial piston unit, observe the general
safety instructions and intended use in chapter 2 "Safety instructions" on
page 10.
▶ Allow the product to acclimatize for a few hours before initial commissioning so
that no condensation water can form inside the housing.
▶ Connect the pressure gauge for the working pressure, case pressure and suction
pressure to the specified measuring points on the axial piston unit or in the
hydraulic system, to check the technical data at first operation.
▶ During commissioning, monitor the temperature of the hydraulic fluid in the
reservoir to ensure that it lies within permissible viscosity limits.
8.1.1 Filling the axial piston unit
Professional filling and air bleeding is required to prevent damage to the axial piston
unit and to maintain proper function.
Bosch Rexroth evaluates hydraulic fluids on the basis of the Fluid Rating
according to data sheet 90235. For hydraulic fluids which have been positively
evaluated in the Fluid Rating, please refer to data sheet 90245 "Bosch Rexroth
fluid rating list for Rexroth hydraulic components (pumps and motors)". Selection
of hydraulic fluid shall make sure that the operating viscosity in the operating
temperature range is within the optimum range (ν
data sheet 92050).
To ensure the functional reliability of the axial piston unit, cleanliness level 20/18/15
according to at least ISO 4406 is required for the hydraulic fluid. 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 cleanliness level of at least 19/17/14 according
to ISO 4406 is required. You can find parameters on the permissible and optimal
viscosities and admissible temperatures in data sheet 92050.
Permissible temperatures:
Ambient temperature at the pump:
Hydraulic fluid temperature range
Procedure
Proceed as follows to fill the axial piston unit:
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 fluids are usually insufficient for the
requirements of our components.
; see selection diagram in the
opt
-20 to +60 °C
-20 to +70 °C
RE 92076-01-B/2021-04-22, Bosch Rexroth AG
65/104
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