Bosch rexroth A21VG 10 Series - Above-reservoir installation

28/56 Installation
Bosch Rexroth Corporation, A21VG Series 10, RE 93223-01-B/09.2020
7.3.2 Above-reservoir installation
Above-reservoir installation means that the axial piston unit is installed above the
minimum uid 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.
3 4
X
1
, X
2
X
2
, R, X
1
h
t min
h
min
L
1
SB
T
h
t min
h
min
L
1
SB
T
Fig. 7: Above-reservoir installation A21VG without boost pump, installation position 3–4
L
1
Filling / air bleed
h
t min
Minimum required immersion depth
(200 mm)
R
Air bleed port
T
Reservoir port (case drain)
h
min
Minimum required spacing to
reservoir bottom(100mm)
SB
Bafe (bafe plate)
h
S max
Maximum permissible suction height
(800mm)
Table 9: Above-reservoir installation
Installation position Air bleeding the
housing
Air bleed
Stroking chamber
Filling
3 (drive shaft, horizontal) R* X
1
, X
2
L
1
+ X
1
+ X
2
4 (drive shaft, horizontal) L
1
– L
1
* If R port is inaccessible, for installation position 1, the X
1
and X
2
ports can be opened to bleed
the air when the unit is not in use. Does not apply to HT units.