Bosch rexroth 1 Series - Filling the axial piston unit

50/68 Commissioning
Bosch Rexroth AG, A20V(L)O Series 1, RE 93100-01-B/2019-09-10
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, and 90223. The titles
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 93100).
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 93100.
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 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 chapter7.3
"Installation position" onpage29. 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. 4:Name plate A20VO, size 520
onpage 22.
Procedure