Bosch Rexroth RE 90300-B - Page 43

RE90300-B/2021-01-19, Bosch Rexroth AG
Commissioning | Axial piston units 43/64
Use only ahydraulic fluid that corresponds to the following requirements:
You can find details on the minimum requirements for hydraulic fluids in
BoschRexroth datasheets 90220, 90221, 90222, 90223, and/or 90225. Thetitles
of the datasheets can be found in Table 1 "Required and supplementary
documentation" on page7.
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)". Thehydraulic fluid should be selected so that the operating
viscosity in the operating temperature range is within the optimum range
(ν
opt
;seeselectiondiagram in the product-specific datasheet).
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 the
product-specific datasheet.
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.
▶ Use asuitable filter system to filter hydraulic fluids during filling to minimize solid
particle contamination and water in the hydraulic system.
2. Fill and air bleed the axial piston unit via the appropriate ports, see the
product-specific instruction manuals. Also fill the hydraulic lines of the system.
NOTICE! Risk of property damage due to inadequate lubrication!
Product can be damaged or destroyed!
▶ When using ashut-off valve in the suction line, make sure that the drive of the
axial piston unit can only be started when the shut-off valves are open.
▶ Dimension ashut-off valve in the suction line so that no inadmissible pressure
drop occurs in the suction area when the shut-off valve is open.
3. If you use ashut-off valve in the suction line, only operate the axial piston unit
with opened shut-off valves.
4. Test the direction of rotation of the drive motor. To do this, run the drive motor
briefly at the lowest rotational speed (inching). Make sure that the direction
of rotation of the axial piston unit agrees with the details of the name plate,
seechapter 5.3 "Product identification", Fig. 1: A4VG name plate on page 23.
Procedure