Bosch rexroth A4VSO 10 Series - Installation Instructions

RE 92050-01-X-B2/2019-08-23, BoschRexrothAG
43 Axial piston variable pump | A4VSO Series 10, 11 and 30
Installation instructions
Installation instructions
General
The axial piston unit must befilled with hydraulic fluid and
air bled during commissioning and operation. This must
also beobserved following alonger standstill astheaxial
piston unit may empty viathehydraulic lines.
Particularly inthe installation position "drive shaft
upwards", filling and air bleeding must becarried out
completely asthere is,for example, adanger ofdry
running.
The leakage in the housing area must be directed to the
reservoir via the highest drain port (T, K
1
, K
2
, R(T)).
For combination pumps, the leakage must bedrained off
ateach single pump.
Ifashared drain line isused for several units, make sure
that therespective case pressure ineach unit isnot
exceeded. The shared drain line must bedimensioned
toensure that themaximum permissible case pressure
ofall connected units isnot exceeded inany operating
conditions, particularly atcold start. Ifthis isnot possible,
separate drain line must belaid, ifnecessary.
To achieve favorable noise values, decouple all connecting
lines using elastic elements and avoid above-reservoir
installation.
In all operating conditions, the suction and drain lines must
flow into the reservoir below the minimum fluid level.
Thepermissible suction heighth
S
results from the total
pressure loss. However, it must not behigher than
h
Smax
=

800mm. The minimum suction pressure
atportSmust also not fall below 0.8bar abs. during
operation and during acold start.
Make sure toprovide adequate distance between suction
line and drain line forthe reservoir design. This prevents
the heated, and possible foaming return flow from being
drawn directly back into the suction line.
Notice
Incertain installation positions, an influence
ontheadjustment orcontrol can beexpected. Gravity,
dead weight and case pressure can cause minor
characteristic shifts and changes inactuating time.
Installation position
See thefollowing examples 1 to7.
Further installation positions are available upon request.
Recommended installation position: 1 and 2
Below-reservoir installation (standard)
Below-reservoir installation means that theaxial piston unit
isinstalled outside ofthereservoir below theminimum
fluid level.
Installation position Air bleed Filling
1
SB
h
t min
h
min
R(L)
T
S
F
R(L) + F S + R(L)
2
SB
h
t min
h
min
R(L)
T
S
F
T + F S + T
3
SB
h
t min
h
min
R(L)
T
U
S
F
T + F S + T + U
For key, see page44.