Bosch Rexroth A4VG 40 Series - Above-Reservoir Installation

Installation 33/68
RE 92004-01-B/05.2017, A4VG Series 40, Bosch Rexroth AG
7.3.2 Above-reservoir installation
Above-reservoir installation means that the axial piston unit is installed above the
minimum fluid level of the reservoir.
Observe the maximum permissible suction heighth
Smax
= 800mm. The
permissible suction heighth
S
is derived from the total pressure loss.
Recommendation for installation position 10 (drive shaft upward): A check valve
in the drain line (cracking pressure 0.5bar) can prevent the housing area from
draining.
7 8 9
10 11 12
h
t min
h
min
h
S max
T
2
S
F
2
SB
F
1
h
t min
h
min
h
S max
T
2
S
F
2
SB
F
1
X
2
, X
1
h
t min
h
min
h
S max
T
1
S
F
2
SB
0.5 bar
F
1
R
1
X
4
, X
3
h
t min
h
min
h
S max
X
3
T
2
T
1
S
F
2
SB
F
1
X
1
X
2
X
1
X
2
h
t min
h
min
h
S max
X
4
T
2
T
1
S
SB
F
2
F
1
h
t min
h
min
T
1
F
2
S
R
SB
h
S max
F
1
X
2
, X
1
Fig. 9: Above-reservoir installation A4VG with installation position 7-12
T
1
, T
2
Highest drain port X
3
, X
4
Stroking chamber pressure port
F
1
, F
2
Filling / air bleeding h
t min
Minimum required immersion depth
(200mm)
R Air bleed port h
min
Minimum required distance to
reservoir bottom (100mm)
R
1
Air bleed port (special version) h
Smax
Maximum permissible suction height
(800mm)
S Suction port SB Baffle (baffle plate)
X
1
, X
2
Control pressure port
Ports F
1
and F
2
are part of the external piping and must be provided on the
customer side to make filling and air bleeding easier.