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Commissioning
Bosch Rexroth Corporation
, A21VG Series 10, RE 93223-01-B/09.2020
of the data sheets can be found in Table 1 „Required and supplementary
documentation“ on page
5.
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 data sheet 93223).
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 details on the
permissible and optimal viscosities and admissible temperatures in data sheet
93223.
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 hydraulic fluids on delivery do not normally conform to
the requirements for our components.
▶
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 via the appropriate ports, see chapter
7.3 “Installation position” on page 27. The hydraulic lines of the system must
also be filled.
NOTICE!
Damage to equipment due to improper lubrication!
Product can be damaged or destroyed!
▶
When using a shut-off valve in the suction line, make sure that the input 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.
When using a shut-off valve in the suction line, only operate the axial piston unit
when the shut-off valves are open.
4.
Test the direction of rotation of the diesel engine. To do this, rotate the diesel
engine 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. 3: Name plate A21VG on
page 20.
5.
Operate the axial piston pump at a lower speed (starter speed for internal
combustion engines or inching operation for electric motors) until the hydraulic
Procedure
