Bosch Rexroth 10 Series - Installation Instructions

RE 92650/2020-03-03, Bosch Rexroth AG
23 Axial piston variable pump | A1VO Series 10
Installation instructions
1) Because complete air bleeding and filling are not possible inthis
position, the pump should beair bled and filled inahorizontal
position before installation.
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 with the "drive shaft up/down" installation
position, filling and air bleeding must be carried out
completely as there is, for example, adanger ofdry
running.
The leakage in the pump housing must be discharged tothe
reservoir via the highest available tank port (L
1
, L
2
).
For combinations ofmultiple units, the leakage fluid must
be drained off at each 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 lines and the 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.
When designing the reservoir, ensure adequate distance
between the suction line and the case drain line. This
prevents theheated 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.
For key, see page 24.
Installation position
See thefollowing examples 1 to11.
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
S
F
SB
h
t min
h
min
L
1
F, L
1
L
1
2
S
L
2
SB
h
t min
h
min
F
F, L
2
L
2
3
S
L
1
SB
h
t min
h
min
F
F, L
1
or L
2
L
1
or L
2
4
1)
S
L
2
SB
h
t min
h
min
F
F, L
1
or L
2
L
1
or L
2