RE 92202/02.2015, Bosch Rexroth AG
Characteristics
▶ Variable pump with axial tapered piston rotary group of
bent-axis design, for hydrostatic drives in open circuit
▶ For use in mobile and stationary applications
▶ Flow is proportional to the drive speed and displace-
ment.
▶ The flow can be steplessly changed by adjusting the
bent axis.
▶ Wide selection of control devices
▶ Compact, robust pump with a long service life
▶ Sizes 28 to 160
▶ Nominal pressure 350bar
▶ Maximum pressure 400bar
▶ Open circuit
Axial piston variable pump
A7VO Series 63
RE 92202
Edition: 02.2015
Replaces: 05.2012
Ordering code 2
Hydraulic fluids 4
Shaft seal ring 5
Flow direction 5
Operating pressure range 6
Technical data 7
LR – Power controller without power override 9
LA1 – Power controller with hydraulically
proportional power override 13
DR – Pressure controller 15
HD – Proportional hydraulic control 18
EP – Proportional electric control 20
Dimensions, size 28 21
Dimensions, size 55 24
Dimensions, size 80 28
Dimensions, size 107 32
Dimensions, size 160 36
Connector for solenoids 40
Installation instructions 41
Project planning notes 42
Safety instructions 42
Contents
Bosch Rexroth AG, RE 92202/02.2015
2 A7VO Series 63 | Axial piston variable pump
Ordering code
Ordering code
01 02 03 04 05 06 07 08 09 10 11 12 13
A7V O / 63 – V B 01
Axial piston unit
01 Bent-axis design, variable, nominal pressure 350 bar, maximum pressure 400 bar
A7V
Operating mode
02 Pump, open circuit
O
Size (NG)
03
Geometric displacement V
g
(cm
3
), see “Technical data” on page 7
28 55 80 107 160
For sizes 250, 355 and 500, see data sheet 92203
Control device 28 55 80 107 160
04 Power controller without power override ● ● ● ● ●
LR
with pressure cut-off ● ● ● ● ●
LRD
with stroke limiter negative control
Δp = 25 bar
– ● ● ● ●
LRH1
with pressure cut-off and stroke limiter negative control
Δp = 25 bar
– ● ● ● ●
LRDH1
with pressure cut-off and load sensing – ● ● ● ● LRDS
Power controller with hydraulically proportional power override
(only available for clockwise rotation and with port plate 02)
with load sensing – ● ● – – LA1S
with load sensing and hydraulically proportional LS-override – ● ● – – LA1S5
Pressure controller ● ● ● ● ●
DR
remotely controlled ● ● ● ● ●
DRG
with load sensing – ● ● ● ●
DRS
Proportional control hydraulic Positive control
Δp = 10 bar
● ● ● ● ●
HD1
with pressure cut-off, remotely controlled Positive control
Δp = 10 bar
● ● ● ● ●
HD1G
Proportional control electrical
Positive control
U = 24 V
● ● ● ● ● EP2
Series
05 Series 6, index 3
63
Direction of rotation
28 to 160
06 Viewed on drive shaft clockwise ●
R
counter-clockwise ●
L
Sealing material
07 FKM (fluoroelastomer)
V
Drive shaft
28 to 160
08 Splined shaft DIN 5480 ●
Z
Parallel keyed shaft according to DIN 6885 ●
P
Mounting flange
09 ISO 3019-2; 4-hole
B
Port plate for working lines
10 SAE flange ports A and S at rear (metric fastening thread)
01
SAE flange ports A and S at side (available for power controllers LA1S and LA1S5 only, metric fastening thread)
02
● = Available – = Not available = Preferred program
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Ordering code
3
1) Connectors for other electric components may differ
01 02 03 04 05 06 07 08 09 10 11 12 13
A7V O / 63 – V B 01
Connector for solenoids
1)
(see page 40)
11 Without connector (without solenoid, with hydraulic control only; without code)
DEUTSCH molded connector, 2-pin – without suppressor diode P
Standard / special version
12 Standard version (without code)
Special version
-S
● = Available – = Not available = Preferred program
Notes
▶ Note the project planning notes on page42!
▶ Preservation:
– Up to 12 months as standard
– Up to 24 months long-term
(state in plain text when ordering)
Bosch Rexroth AG, RE 92202/02.2015
4 A7VO Series 63 | Axial piston variable pump
Hydraulic fluids
Hydraulic fluids
The A7VO variable pump is designed for operation with HLP
mineral oil according to DIN 51524.
Application instructions and requirements for hydraulic
fluids should be taken from the following data sheets
before the start of project planning:
▶ 90220: Hydraulic fluids based on mineral oils and
related hydrocarbons
▶ 90221: Environmentally acceptable hydraulic fluids
▶ 90222: Fire-resistant, water-free hydraulic fluids
(HFDR/HFDU)
▶ 90223: Fire-resistant, water-containing hydraulic fluids
(HFC, HFB, HFAE, HFAS)
Details regarding the selection of hydraulic fluid
The hydraulic fluid should be selected such that the
operating viscosity in the operating temperature range is
within the optimum range (ν
opt
, see selection diagram).
Note
At no point of the component may the temperature be
higher than 115 °C. The temperature difference specified in
the table is to be taken into account when determining the
viscosity in the bearing.
If it is not possible to maintain the conditions above due to
extreme operating parameters, we recommend flushing the
case at port U.
Viscosity and temperature of hydraulic fluids
Viscosity Temperature Comment
Cold start
ν
max
≤1600mm
2
/s θ
St
≥-40°C t≤3min, n≤1000rpm, without load p≤50 bar
Permissible temperature difference
ΔT≤25K
between axial piston unit and hydraulic fluid in the system
Warm-up phase
ν<1600 to 400mm
2
/s θ=-40°C to -25°C at p≤0.7×p
nom
, n≤0.5×n
nom
and t≤15min
Continuous operation
ν=400 to 10mm
2
/s
This corresponds, for example on the VG46, to a temperature
range of +5°C to +85 °C (see selection diagram)
θ=-25°C to +103°C
measured at port R
1
/R
2
Note the permissible temperature range of the shaft seal
(ΔT=approx.12K between the bearing/shaft seal and port R
1
/R
2
)
ν
opt
=36 to 16mm
2
/s
Range of optimum operating viscosity and efficiency
Short-term operation
ν
min
≥7mm
2
/s t<3min, p<0.3×p
nom
▼ Selection diagram
-40 -25 -10 10 30 50 90 11570
0
7
10
40
60
20
100
200
400
600
1000
1600
VG 22
VG 32
VG 46
VG 68
VG 100
16
36
Range of optimum operating viscosity v
opt
Optimum efficiency
Maximum permissible viscosity for cold start
Minimum permissible viscosity for short-term operation
Temperature θ [°C]
Viscosity v [mm
2
/s]
Continuous operation
Warm-up phase
Minimum permissible temperature for cold start
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Shaft seal ring
5
Filtration of the hydraulic fluid
Finer filtration improves the cleanliness level of the hydrau-
lic fluid, which in turn increases the service life of the axial
piston unit.
A cleanliness level of at least 20/18/15 is to be maintained
according to ISO 4406.
At very high hydraulic fluid temperatures (90°C to maxi-
mum 103°C, measured at portR
1
/R
2
) a cleanliness level is
necessary of at least 19/17/14 according to ISO 4406.
Leakage
The case interior is connected to the suction chamber. A
separate case drain line from the case to the reservoir is
therefore not required (both R ports are plugged).
Exception: For versions with pressure controller or pressure
cut-off, a drain line is needed to relieve port T
1
to the
reservoir.
Shaft seal ring
Permissible pressure loading
The service life of the shaft seal is influenced by the speed
of the axial piston unit and the leakage pressure in the
housing (case pressure). Momentary pressure spikes
(t<0.1s) up to 10bar are allowed. The service life of the
shaft seal decreases with increasing frequency of pressure
spikes and increasing mean differential pressure.
The case pressure must be equal to or higher than the
ambient pressure.
0
1
2
3
4
5
20000 4000 6000
Differential pressure ∆p [bar]
Rotational speed n [rpm]
NG107
NG160
NG28
NG55
NG80
The FKM shaft seal ring may be used for leakage
temperatures from -25°C to +115°C. For application cases
below -25 °C, an NBR shaft seal is required (permissible
temperature range: -40 °Cto+90°C).
Flow direction
Direction of rotation, viewed on drive shaft
clockwise counter-clockwise
S to B S to A
Bosch Rexroth AG, RE 92202/02.2015
6 A7VO Series 63 | Axial piston variable pump
Operating pressure range
Operating pressure range
Pressure at working port A or B (high-pressure side) Definition
Nominal pressure p
nom
350 bar absolute The nominal pressure corresponds to the maximum design
pressure.
Maximum pressure p
max
400 bar absolute The maximum pressure corresponds the maximum operating
pressure within the single operating period. The sum of the single
operating periods must not exceed the total operating period.
Single operating period 10s
Total operating period 300 h
Minimum pressure (high-pressure side) 10 bar absolute Minimum pressure on high-pressure side (A or B) required to
prevent damage to the axial piston unit.
Rate of pressure change R
Amax
16000bar/s Maximum permissible rate of pressure build-up and reduction
during a pressure change over the entire pressure range.
Pressure at suction port S (Inlet)
Minimum pressure p
Smin
0.8 bar absolute
Minimum pressure at suction port S (inlet) that is required to avoid
damage to the axial piston unit. The minimum required pressure is
dependent on the speed and displacement of the axial piston unit
(see diagram on page 7).
Maximum pressure p
Smax
2bar absolute
▼ Rate of pressure change R
Amax
p
nom
∆t
∆p
Time t
Pressure p
▼ Pressure definition
Pressure p
t
1
t
2
t
n
Single operating period
Minimum pressure (high pressure side)
Maximum pressure p
max
Nominal pressure p
nom
Time t
Total operating period = t
1
+ t
2
+ ... + t
n
Note
Operating pressure range valid when using hydraulic
fluids based on mineral oils. Values for other hydraulic
fluids, please contact us.
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Technical data
7
Technical data
Size NG 28 55 80 107 160
Displacement, geometric, per revolution
V
g max
cm
3
28.1 54.8 80 107 160
Maximum rotational
speed
1)
At V
g max
n
nom
rpm 3150 2500 2240 2150 1900
At V
g
< 0.74 × V
g max
n
max1
rpm 4250 3400 3000 2900 2560
Maximum rotational
speed
2)
n
max2
rpm 4750 3750 3350 3200 2850
Flow
At V
g max
and n
nom
q
v
l/min 89 137 179 230 304
Power
At V
g max
, n
nom
and Δp=350bar P
kW 52 80 105 134 177
Torque
At V
g max
and Δp = 350 bar T
Nm 156 305 446 596 891
Rotary stiffness
V
g max
to V
g
/2 c
min
kNm/rad 5 10 16 21 36
V
g
/2 to 0 (interpolated) c
max
kNm/rad 16 32 49 67 104
Moment of inertia rotary group
J
GR
kgm² 0.0042 0.0042 0.0080 0.0127 0.0253
Maximum angular acceleration
α
rad/s² 35900 31600 24200 19200 15300
Case volume
V
l 0.5 0.75 1.2 1.5 2.4
Weight (approx.)
m
kg 17 25
40 49 71
▼ Maximum permissible speed (limit speed)
0.6 0.7 0.8 0.9 1.0
2.3
2.0
1.8
1.6
1.4
1.2
1.1
1.0
0.9
0.8
1.9
1.7
1.5
1.3
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
Displacement V
g
/ V
g max
Speed n / n
nom
Inlet pressure p
abs
Determining operating characteristics
Flow
q
v
=
V
g
× n × η
v
[l/min]
1000
Torque
T
=
V
g
× Δp
[Nm]
20 × π × η
mh
Power
P
=
2 π × T × n
=
q
v
× Δp
[kW]
60000
600 × η
t
Key
V
g
= Displacement per revolution [cm
3
]
Δp
= Differential pressure [bar]
n
= Rotational speed [rpm]
η
v
= Volumetric efficiency
η
mh
= Mechanical-hydraulic efficiency
η
t
=
Total efficiency (η
t
= η
v
× η
mh
)
Notes
▶ Theoretical values, without efficiency and tolerances;
values rounded
▶ Operation above the maximum values or below the
minimum values may result in a loss of function, a
reduced service life or in the destruction of the axial
piston unit. Other permissible limit values, such as
speed variation, reduced angular acceleration as a
function of the frequency and the permissible angular
acceleration at start (lower than the maximum angular
acceleration) can be found in data sheet 90261.
1) The values are valid:
‒ At absolute pressure p
abs
= 1bar at suction port S
‒ For the optimal viscosity range of ν
opt
=36 to 16 mm
2
/s
‒ For hydraulic fluid based on mineral oils.
2) Maximum rotational speed (speed limit) for increased inlet
pressure p
abs
at suction port S and V
g
< V
g max
, see diagram.
Bosch Rexroth AG, RE 92202/02.2015
8 A7VO Series 63 | Axial piston variable pump
Technical data
Permissible radial and axial forces of the drive shaft
Size NG 28 55 80 107 160
Drive shaft Ø mm 25 30 35 40 45
Maximum radial force
1)
at distance a (from shaft
collar)
a
F
q
F
q max
N 6436 7581 10266
13758
18278
a mm 14.0 17.5 20.0 22.5 25.0
Maximum torque at F
q max
T
q max
Nm 179 281 444 681 1019
Maximum differential pressure at V
g max
and
F
qmax
Δp
q max
bar 400 322 349 400 400
Maximum axial force at
standstill or pressure-
free operation
–
+
F
ax
+F
axmax
N 0 0 0 0 0
−F
axmax
N 315 500 710 900 11250
Permissible axial force per bar operating pressure
+F
axperm
/bar
N/bar
4.6 7.5 9.6 11.3 15.1
Effect of radialforce F
q
on the service life of bearings
By selecting a suitable direction of radial force F
q
, the load
on the bearings, caused by the internal rotary group forces
can be reduced, thus optimizing the service life of the
bearings. Recommended position of mating gear is depen-
dent on direction of rotation. Example:
Note
▶ The permissible axial force in direction −F
ax
is to be
avoided, because thereby the bearing life is reduced.
▶ Special requirements apply in the case of belt drives.
Please contact us.
▼ Gear drive
φ
o
p
t
=
4
5
°
φ
o
p
t
=
4
5
°
21
1 “Clockwise” rotation, pressure at port B
2 “Counter-clockwise” rotation, pressure at port A
1) With intermittent operation
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
LR – Power controller without power override
9
LR – Power controller without power override
The power controller regulates the displacement of the
pump depending on the operating pressure so that a given
drive power is not exceeded at constant drive speed.
The precise control with a hyperbolic control characteristic,
provides an optimum utilization of available power.
The operating pressure acts on a rocker via a measuring
spool which moves with the control. An externally adjust-
able spring force counteracts this, it determines the power
setting.
If the operating pressure exceeds the set spring force, the
control valve is actuated by the rocker and the pump swiv-
els back from the initial position V
gmax
toward V
gmin
. When
doing this, the lever length at the rocker shortens and the
operating pressure may rise in the same proportion as the
displacement reduces without the drive power being
exceeded (p
B
×V
g
=constant; p
B
=operating pressure;
V
g
=displacement).
When depressurized, the pump is swiveled to its initial
position to V
g max
by a return spring.
The hydraulic output power (characteristic LR) is influ-
enced by the efficiency of the pump.
▶ Beginning of control, setting range 50 to 220bar
When ordering, state in plain text:
▶ Drive power P [kW]
▶ Drive speed n [rpm]
▶ Maximum flow q
v max
[l/min]
Please contact us if you need a power diagram.
▼ Characteristic curve LR
220 bar
50 bar
V
g min
displacement V
g max
Operating pressure p
B
[bar]
▼ Schematic LR
T
1
X
3
B(A)
A
1
M
1
R
2
U
R
1
V
g min
V
g max
S
Bosch Rexroth AG, RE 92202/02.2015
10 A7VO Series 63 | Axial piston variable pump
LR – Power controller without power override
LRD – Power controller with pressure cut-off
The pressure cut-off is a pressure control which adjusts the
displacement of the pump back to V
g min
after reaching the
set pressure command value.
This function overrides the power controller, i.e. the power
control function is executed below the pressure command
value.
Pressure cut-off is preset to a pressure command value at
the factory.
▶ Setting range 200 to 350 bar
When ordering, state the setting in plain text.
Notes
▶ The pressure setting of the pressure cut-off must be at
least a factor of 5 higher than the beginning of control
of power control.
Example:
– Beginning of control of the power controller: 50bar
– Minimum setting of pressure cut-off:
5×50=250bar
Higher settings of the pressure cut-off are always
possible.
▶ For versions with pressure cut-off, a drain line is
needed from port T
1
to the reservoir.
When port T
1
is plugged and t
tank
≤50°C, this results
in a permissible pressure cut-off of≤2 min.
▶ Any pressure-relief valve included in the system to limit
the maximum pressure must have its start of opening
at least 20 bar above the pressure cut-off setting.
▼ Characteristic curve LRD
350
200
min
max
V
g min
displacement V
g max
Operating pressure p
B
[bar]
▼ Schematic LRD
T
1
X
3
B(A)
A
1
M
1
R
2
U
R
1
V
g min
V
g max
S
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
LR – Power controller without power override
11
LR… – Power controller with stroke limiter
Due to the hydraulic stroke limiter, it is possible to change
or limit the displacement of the pump continuously across
the entire control range. The displacement is set propor-
tionally using the pilot pressure p
St
applied to port X
1
(maximum of 40 bar).
The power control overrides the hydraulic stroke limiter, i.e.
below the power characteristic (hyperbolic characteristic),
the displacement is controlled in dependence on the pilot
pressure. If the set flow or operating pressure exceeds the
power control characteristic, the power control overrides
and reduces the displacement along the hyperbolic charac-
teristic.
A control pressure of 40bar is needed to swivel the pump
from its initial position V
gmax
to V
gmin
.
The necessary control power is taken from the operating
pressure or the external control pressure applied to port Y
3
.
To ensure that the stroke limiter functions at a low operat-
ing pressure of <40bar, port Y
3
must be supplied with an
external control pressure of about 40bar.
LRH1 – Hydraulic stroke limiter (negative control)
▶ Control from V
gmax
to V
gmin
As the pilot pressure increases, the pump swivels to a
smaller displacement.
▶ Start of control (at V
gmax
) can be set to 4to15bar
When ordering, state the start of control in plain text.
▶ Initial position without pilot signal (pilot pressure): V
gmax
▼ Characteristic curve LRH1
control pressure increase (V
gmax
–V
gmin
) Δp=25bar
40
35
30
25
20
15
10
5
4
0 0.6 0.8 1.00.40.2
Displacement V
g
/V
g max
Pilot pressure p
St
[bar]
▼ Schematic LRH1
T
1
X
3
X
1
Y
3
B(A)
A
1
M
1
R
2
U
R
1
V
g min
V
g max
S
▼ Schematic LRDH1
T
1
X
3
X
1
Y
3
B(A)
A
1
M
1
R
2
U
R
1
V
g min
V
g max
S
Bosch Rexroth AG, RE 92202/02.2015
12 A7VO Series 63 | Axial piston variable pump
LR – Power controller without power override
LRDS – Power control with pressure cut-off and load
sensing
The load sensing controller works as a load-pressure con-
trolled flow controller and adjusts the displacement of the
pump to the volume required by the consumer. The flow of
the pump is then dependent on the cross section of the
external measuring orifice (1), which is located between
the pump and the consumer. Below the power curve and
the setting of the pressure cut-off and within the control
range of the pump, the flow is independent of the load
pressure.
The measuring orifice is usually a separately located load
sensing directional valve (control block). The position of
the directional valve spool determines the opening cross-
section of the measuring orifice and thus the flow of the
pump.
The load sensing controller compares pressure before and
after the orifice and keeps the pressure drop (differential
pressure Δp) across the orifice – and therefore the
flow – constant.
If the differential pressure ∆p at the measuring orifice rises,
the pump is swiveled back (toward V
g min
). If the differential
pressure Δp drops, the pump is swiveled out (toward
V
gmax
) until equilibrium at the measuring orifice is restored.
Δp
measuring orifice
=p
pump
–p
consumer
▶ Setting range for Δp 14to25bar
▶ Default setting 18bar
When ordering, state the setting in plain text.
The stand-by pressure in zero-stroke mode (metering orifice
closed) is slightly higher than the Δp setting.
In an LUDV system, the pressure cut-off is integrated in the
flow sharing control block (LUDV).
▼ Characteristic curve LRDS
350
200
min
max
V
g min
displacement V
g max
Operating pressure p
B
[bar]
▼ Schematic LRDS
T
1
X
3
X
4
B(A)
1
A
1
M
1
R
2
U
R
1
V
g min
V
g max
S
The measuring orifice (control block) (1) is not included in
the scope of delivery.
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
LA1 – Power controller with hydraulically proportional power override
13
LA1 – Power controller with hydraulically proportional power override
The power controller regulates the displacement of the
pump depending on the operating pressure so that a given
drive power is not exceeded at constant drive speed.
The hyperbolic power curve is approximated with two
measuring springs. The operating pressure acts on the mea-
surement area of a differential piston against the measuring
springs and an externally adjustable spring force which
determines the power setting.
If the sum of the hydraulic forces exceeds the forces of the
springs, the control oil is fed to the stroking piston, which
swivels the pump back to reduce the flow.
In a depressurized state, the pump is swiveled to its initial
position to V
g max
by a return spring.
By connecting an external pilot pressure at port X
3
, it is
possible to override the power control proportionally.
Increasing pilot pressure=reduced power.
▼ Characteristic curve LA1
Operating pressure p
A
[bar]
Setting range
Beginning of control
400
350
300
250
200
150
100
50
0
0 0.2 0.4 0.6 0.8 1.0
V
g min
displacement V
g max
The hydraulic output power (characteristic curve) is
affected by the efficiency.
When ordering, state in plain text:
▶ Drive power P [kW]
▶ Drive speed n [rpm]
▶ Maximum volume flow q
V max
[l/min]
Please contact us if you need a power diagram.
LA1S – Power controller with load sensing
For description of load sensing, see page12.
▼ Characteristic curve LA1S
350
200
min
max
V
g min
displacement V
g max
Operating pressure p
B
[bar]
▼ Schematic LA1S
X
3
X
4
A
R
2
U
R
1
V
g min
V
g max
S
Bosch Rexroth AG, RE 92202/02.2015
14 A7VO Series 63 | Axial piston variable pump
LA1 – Power controller with hydraulically proportional power override
LA1S5 – Power controller with load sensing and
hydraulically proportional LS-override
By connecting an external pilot pressure at port X
6
, it is
possible to override proportionally the differential
pressure Δp of the load sensing control.
Increasing pilot pressure = lower Δp setting.
An example of this is shown in the characteristic curve
below.
Please consult us before carrying out project planning.
▼ Characteristic curve LA1S5
25
18
14
10
5
0 5 10
15 20 25 30
Pilot pressure p
X6
[bar]
Differential pressure
∆p
LS
[bar]
▼ Schematic LA1S5
X
3
X
6
X
4
A
R
2
U
R
1
V
g min
V
g max
S
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
DR – Pressure controller
15
DR – Pressure controller
The pressure control limits the maximum pressure at the
pump outlet within the control range of the variable pump.
The variable pump only delivers as much hydraulic fluid as
is required by the consumers. If the operating pressure
exceeds the setpoint value set at the integrated pressure
valve, the pump control will shift toward a smaller
displacement and the control deviation will decrease.
When depressurized, the pump is swiveled to its initial
position V
gmax
by an adjustment spring.
▶ Setting range of pressure control 50to350bar
When ordering, state the setting in plain text.
Notes
▶ For versions with controller DR, a drain line is needed
from port T
1
to the reservoir.
▶ Any pressure-relief valve included in the system to limit
the maximum pressure must be set to a cracking pres-
sure at least 20bar above the controller setting.
▼ Characteristic curve DR
50
350
max
max. 10 bar
min
q
V min
flow q
V
[l/min] q
V max
Operating pressure p
B
[bar]
▼ Schematic DR
M
1
R
2
U R
1
T
1
X
3
B(A)
A
1
S
V
g min
V
g max
Zero-stroke operation
The standard pump unit is designed for intermittent con-
stant pressure operation. Short-term zero-stroke operation
(< 1min.) is permissible up to an operating pressure
p
max
=315bar at a reservoir temperature of ≤50°C.
In the case of longer zero-stroke operation (> 1 min),
bearing flushing should be carried out via flushing port U.
U
R
1
S
T
1
R
2
Flow port
Flushing flow (recommended)
NG 28 55 80 107 160
q
V flush
l/min 3 4 6 8 12
Temperature of flushing fluid ≤ reservoir temperature
Bosch Rexroth AG, RE 92202/02.2015
16 A7VO Series 63 | Axial piston variable pump
DR – Pressure controller
DRG – Pressure controller, remotely controlled
A separate sequence valve with port plate provides the
pressure control function. The valve is arranged separate
from the pump; in this connection, you should not exceed
the single line length of 5m. The valve is supplied with high
pressure from port A
1
of the pump. The system feeds back
via port X
3
the control power of the valve into the pump;
the valve adjusts the pump back to V
gmin
. Note that ports T
of the sequence valve and T
1
of the pump are returned to
the reservoir (cooler).
▶ Setting range of pressure control 50to315bar
When ordering, state the setting in plain text.
Notes
▶ For versions with controller DRG, a drain line is
needed from port T
1
to the reservoir.
▶ Any pressure-relief valve included in the system to limit
the max. pressure must be set to a cracking pressure
at least 20bar above the controller setting.
You must order the sequence valve and the port plate
separately.
▶ Sequence valve (1): DZ5DP2-1X/315YMSO21
(Material number R900495604)
▶ Port plate (2): G 115/1
(Material number R900424379)
▼ Characteristic curve DRG
50
315
max
max. 10 bar
min
q
V min
flow q
V
[l/min] q
V max
Operating pressure p
B
[bar]
▼ Schematic DRG
R
2
U
R
1
V
g min
V
g max
T
1
X
3
A
A
1
M
1
S
P A T
1
2
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
DR – Pressure controller
17
DRS – Pressure controller with load sensing
For description of load sensing, see page12.
Notes
▶ For versions with controller DRS, a drain line is
needed from port T
1
to the reservoir.
▶ The pressure controller overrides the load-sensing
controller, i.e. the load-sensing function operates
below the set pressure.
▼ Characteristic curve DRS
50
350
max
max. 10 bar
min
q
V min
flow q
V
[l/min] q
V max
Operating pressure p
B
[bar]
▼ Schematic DRS
R
2
U
R
1
V
g min
V
g max
T
1
X
3
A
A
1
M
1
S
X
4
1
The measuring orifice (control block) (1) is not included in
the scope of delivery.
Bosch Rexroth AG, RE 92202/02.2015
18 A7VO Series 63 | Axial piston variable pump
HD – Proportional hydraulic control
HD – Proportional hydraulic control
The proportional hydraulic control provides continuous
control of the displacement. Control is carried out propor-
tional to the pilot pressure applied at port X
1
.
▶ Maximum permissible pilot pressure p
St
=40bar
▶ Control from V
gmin
to V
gmax
(positive control)
As the pilot pressure increases, the pump swivels to a
larger displacement.
▶ Start of control (at V
gmin
) can be set to 4to15bar
When ordering, state the start of control in plain text.
A control pressure of 40bar is needed to swivel the pump
from its initial position V
gmin
to V
gmax
.
The necessary control power is taken from the operating
pressure or the external control pressure applied to port Y
3
.
To ensure that control is guaranteed at a low operating
pressure of <40bar too, port Y
3
must be supplied with an
external control pressure of about 40bar.
▼ Characteristic curve HD1 positive control
increase in control pressure (V
gmin
–V
gmax
) Δp=10bar
40
35
30
25
20
15
10
5
4
0 0.6 0.8 1.00.40.2
Displacement V
g
/V
g max
Pilot pressure p
St
[bar]
▼ Schematic HD
R
2
U
R
1
V
g min
V
g max
T
1
X
3
X
1
Y
3
B(A)
A
1
M
1
S
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
HD – Proportional hydraulic control
19
HD1G – Proportional hydraulic control with pressure
cut-off, remotely controlled
A separate sequence valve with port plate provides the
pressure cut-off function. The valve is arranged separate
from the pump; in this connection, you should not exceed
the single line length of 5m. The valve is supplied with high
pressure from port A
1
of the pump. The system feeds back
via port X
3
the control power of the pump into the valve
and at port A of the sequence valve's port plate diverts it
into the reservoir; if the set pressure command value is
exceeded, this adjusts the pump back to V
gmin
.
▶ Pressure cut-off setting range 50 to 315 bar
When ordering, state the pressure cut-off setting in plain
text.
Notes
▶ Port A from the sequence valve must be returned to
the reservoir (cooler).
▶ Any pressure-relief valve included in the system to limit
the max. pressure must be set to a cracking pressure
at least 20bar above the controller setting.
You must order the sequence valve and the port plate
separately.
▶ Sequence valve (1): DZ5DP2-1X/315XYMSO20
(Material number R900490554)
▶ Port plate (2): G 115/1
(Material number R900424379)
▼ Characteristic curve HD1G positive control
50
315
max
max. 10 bar
min
q
V min
flow q
V
[l/min] q
V max
Operating pressure p
B
[bar]
▼ Schematic HD1G
R
2
U
R
1
V
g min
V
g max
T
1
X
3
X
1
Y
3
B(A)
A
1
M
1
S
P T
A
B(X)
1
2
Bosch Rexroth AG, RE 92202/02.2015
20 A7VO Series 63 | Axial piston variable pump
EP – Proportional electric control
EP – Proportional electric control
The proportional electric control, type EP, provides continu-
ous control of the displacement. Control is proportional to
the electric control current applied to the solenoid.
▶ Control from V
gmin
to V
gmax
(positive control)
As the pilot pressure increases, the pump swivels to a
larger displacement.
A control pressure of 40bar is needed to swivel the pump
from its initial position V
gmin
to V
gmax
.
The necessary control power is taken from the operating
pressure or the external control pressure applied to port Y
3
.
To ensure that control is guaranteed at a low operating
pressure of <40bar too, port Y
3
must be supplied with an
external control pressure of about 40bar.
Various BODAS controllers with application software and
amplifiers are available for controlling the proportional
solenoids.
Further information can also be found on the Internet at
www.boschrexroth.com/mobile-electronics.
Technical data, solenoid EP2
Voltage 24V (±20%)
Control current
Start of control 200mA
End of control 600mA
Current limit 0.77A
Nominal resistance (at 20°C) 22.7Ω
Dither frequency 100Hz
Duty cycle 100%
Type of protection: see connector version page 40
▼ Characteristic curve EP2 positive control
0 0.6 0.8 1.00.40.2
800
700
600
500
400
300
200
100
Displacement V
g
/ V
g max
Control current I [mA]
▼ Schematic EP2
R
2
U
R
1
V
g min
V
g max
T
1
X
3
Y
3
B(A)
A
1
M
1
S
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 28
21
Dimensions [mm]
Dimensions, size 28
LR – Power controller without power override
All of the variants of the controllers on page 23 are shown for the clockwise direction of input rotation (view Y)
207
16
198
209 (X
3
)
25
7
13.4 max
26
1)
⌀100
-0.022
ø62
12°30'
29
119
18
92
20
33
209 (A
1
)
215
50.8
49
19
60
71
35.7
23.8
79
69.9
38
108.5
49
52
X
3
S
LR
T
1
S
LR
T
1
A
1
X
3
A
1
B
A
1
X
3
T
1
Y
A
R
1
R
2
U
125
45°
45°
118
118
11
24
View Y
Counter-clockwise rotation
Flange
ISO 3019-2
View Y
Clockwise rotation
1) To shaft collar
Bosch Rexroth AG, RE 92202/02.2015
22 A7VO Series 63 | Axial piston variable pump
EP – Proportional electric control
Dimensions [mm]
1) Center bore according to DIN 332 (thread according to DIN 13)
2) For notes on tightening torques, see instruction manual.
3) Depending on the application, momentary pressure peaks can
occur. Keep this in mind when selecting measuring devices and
fittings.
4) Only dimensions according to SAEJ518, metric fastening thread is
a deviation from the standard.
5) The spot face can be deeper than specified in the appropriate
standard.
6) For versions with a pressure controller or pressure cut-off, a drain
line is needed to relieve port T
1
to the reservoir.
O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
▼ Splined shaft DIN 5480 ▼ Parallel keyed shaft DIN 6885
Z – W25×1.25×18×9g P – AS8×7×40
43
28
M8 × 1.25
1)2)
⌀35
6
19
28
50
M8 × 1.25
1)2)
⌀35
⌀25
+0.015
+0.002
6
19
Key width 8
Ports Standard Size
2)
p
max abs
[bar]
3)
Status
A (B) Working port (high-pressure series)
fastening thread
SAE J518
4)
DIN 13
3/4 in
M10 × 1.5; 17 deep
400 O
S Suction port (standard series)
fastening thread
SAE J518
4)
DIN 13
1 1/2 in
M12 × 1.75; 20 deep
2 O
U Bearing flushing DIN 3852
5)
M16 × 1.5; 12 deep 2 X
R
1
, R
2
Air bleed DIN 3852
5)
M18× 1.5; 12deep 2 X
A
1
Measuring high pressure DIN 3852
5)
M12 × 1.5; 12 deep 400 X
T
1
Control fluid drain DIN 3852
5)
M12 × 1.5; 12 deep 400 X
6)
X
3
Override DIN 3852
5)
M12 × 1.5; 12 deep 400 X
Y
3
External control pressure DIN 3852
5)
M14× 1.5; 12deep 40 X
X
1
Pilot pressure DIN 3852
5)
M14× 1.5; 12deep 40 O
M
1
Control pressure measurement DIN 3852
5)
M12 × 1.5; 12 deep 400 X
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
EP – Proportional electric control
23
Dimensions [mm]
▼ LRD – Power controller with pressure cut-off ▼ DR/DRG – Pressure controller/pressure controller remotely
controlled
124
108.5
236
D
LR
236
132 (DR)
92 (DRG)
DR
DRG
▼ HD1, HD1G – Proportional hydraulic control , positive control,
and variant with pressure cut-off, remotely controlled
▼ EP2 – Proportional control electric, positive control
X
1
Y
3
X
1
A
1
X
3
Y
3
X
3
A
1
199
170
85
216
76 (X
3
)
78 (A
1
)
188 (X
3
)
187 (A
1
)
159 (Y
3
)
155 (X
1
)
49
4.5
15
153
A
1
X
3
Y
3
Y
3
X
3
A
1
264 85
216
76 (X
3
)
78 (A
1
)
188 (X
3
)
187 (A
1
)
159 (Y
3
)49 15
153
Bosch Rexroth AG, RE 92202/02.2015
24 A7VO Series 63 | Axial piston variable pump
Dimensions, size 55
Dimensions [mm]
Dimensions, size 55
LR – Power controller without power override
All of the variants of the controllers on pages 26 and 27 are shown for the clockwise direction of input rotation (view Y)
T
1
T
1
X
3
X
3
A
1
A
1
Y
R
1
R
2
150
150
13.5
45°
45°
160
⌀125
-0.025
⌀70
140
36
35
12
142
35
12°30'
31
7.5
32
1)
20
(X
3
)242
(A
1
)241
262
(T
1
)241
232
14.6 max
32
57
76 90
62
12
50.8
19
100
49
42.9
77.8
49
23.8
U
X
3
A
1
T
1
S
S
B
A
LR LR
View Y
Counter-clockwise rotation
Flange
ISO 3019-2
View Y
Clockwise rotation
1) To shaft collar
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 55
25
Dimensions [mm]
▼ Splined shaft DIN 5480 ▼ Parallel keyed shaft DIN 6885
Z – W30×2×14×9g P – AS8×7×50
35
27
M12 × 1.75
1)2)
⌀45
9.5
28
33
60
M12 × 1.75
1)2)
⌀45
⌀30
+0.015
+0.002
9.5
28
Key width 8
Ports Standard Size
2)
p
max abs
[bar]
3)
Status
A (B) Working port (high-pressure series)
fastening thread
SAE J518
4)
DIN 13
3/4 in
M10 x 1.5; 17 deep
400 O
S Suction port (standard series)
fastening thread
SAE J518
4)
DIN 13
2 in
M12 × 1.75; 20 deep
2)
2 O
U Bearing flushing DIN 3852
5)
M18× 1.5; 12deep 2 X
R
1
, R
2
Air bleed DIN 3852
5)
M18× 1.5; 12deep 2 X
R
1
Air bleed (LA1S only.) DIN 3852
5)
M22× 1.5; 15.5deep 2 X
R
2
Air bleed (LA1S only.) DIN 3852
5)
M27× 2; 19deep 2 X
A
1
Measuring high pressure DIN 3852
5)
M14× 1.5; 12deep 400 X
T
1
Control fluid drain DIN 3852
5)
M12 × 1.5; 12 deep 400 X
6)
X
3
Override DIN 3852
5)
M14× 1.5; 12deep 400 X
Y
3
External control pressure DIN 3852
5)
M14× 1.5; 12deep 40 X
X
1
Pilot pressure DIN 3852
5)
M14× 1.5; 12deep 40 O
X
4
Load pressure DIN 3852
5)
M14 × 1.5; 12 deep 400 O
M
1
Control pressure measurement DIN 3852
5)
M12 × 1.5; 12 deep 400 X
1) Center bore according to DIN 332 (thread according to DIN 13)
2) For notes on tightening torques, see instruction manual.
3) Depending on the application, momentary pressure peaks can
occur. Keep this in mind when selecting measuring devices and
fittings.
4) Only dimensions according to SAEJ518, metric fastening thread is
a deviation from the standard.
5) The spot face can be deeper than specified in the appropriate
standard.
6) For versions with a pressure controller or pressure cut-off, a drain
line is needed to relieve port T
1
to the reservoir.
O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Bosch Rexroth AG, RE 92202/02.2015
26 A7VO Series 63 | Axial piston variable pump
Dimensions, size 55
Dimensions [mm]
▼ LRD – Power controller with pressure cut-off ▼ LRDS – Power control with pressure cut-off and load sensing
D
LR
128
119
D
LR
140
151
119
X
4
6
X
4
300
239
▼ LRDH1 – Power control with pressure cut-off and stroke limiter ▼ LA1S – Power control with load sensing,
LA1S5 – Power control with load sensing and hydraulically
proportional LS-override
D
LR
Y
3
X
1
Y
3
X
1
257 (X
1
)
252 (Y
3
)
127
170
105
12
119
262
76 101
46 17
34
B (S)
X
6
X
6
X
3
115
154
144
186
X
4
X
4
X
3
24
156
264
183 (B)
184 (S)
230
Port X
6
with version LA1S5 only
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 55
27
Dimensions [mm]
▼ DR/DRG – Pressure controller/pressure controller remotely
controlled
▼ DRS – Pressure controller with load sensing
DR
DRG
135 (DR)
114 (DRG)
DR
X
4
X
4
S
151
141
238
6
300
▼ HD1, HD1G – Proportional hydraulic control , positive control,
and variant with pressure cut-off, remotely controlled
▼ EP2 – Proportional control electric, positive control
A
1
A
1
X
3
X
3
X
1
Y
3
X
1
Y
3
221
192
100
256
82
101
221 (X
3
)
209 (A
1
)
190 (Y
3
)
186 (X
1
)
57
12 12
170
A
1
A
1
X
3
X
3
Y
3
Y
3
286 100
256
82
101
221 (X
3
)
209 (A
1
)
190 (Y
3
)
57
12 12
170
Bosch Rexroth AG, RE 92202/02.2015
28 A7VO Series 63 | Axial piston variable pump
Dimensions, size 80
Dimensions [mm]
Dimensions, size 80
LR – Power controller without power override
All of the variants of the controllers on pages 30 and 31 are shown for the clockwise direction of input rotation (view Y)
T
1
T
1
X
3
A
1
X
3
A
1
Y
R
1
R
2
27.8
34
102
50.8
111
144
31
12°30'
14.6 max
7.5
32
1)
23
88.9
62
80
57.2
25
6422
57
40
38
17
157
37
287
(A
1
)270
(T
1
)270
253
(X
3
)265
180
13.5
165
45°
45°
⌀83
⌀140
-0.025
70
62
A
S
B
U
X
3
A
1
T
1
S
165
LR LR
View Y
Counter-clockwise rotation
Flange
ISO 3019-2
View Y
Clockwise rotation
1) To shaft collar
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 80
29
Dimensions [mm]
▼ Splined shaft DIN 5480 ▼ Parallel keyed shaft DIN 6885
Z – W35×2×16×9g P – AS10×8×56
40
32
M12 × 1.75
1)2)
⌀50
9.5
28
38
70
M12 × 1.75
1)2)
⌀50
⌀35
+0.018
+0.002
9.5
28
Key width 10
Ports Standard Size
2)
p
max abs
[bar]
3)
Status
A (B) Working port (high-pressure series)
fastening thread
SAE J518
4)
DIN 13
1 in
M12 × 1.75; 17 deep
400 O
S Suction port (standard series)
fastening thread
SAE J518
4)
DIN 13
2 1/2
in M12 × 1.75; 17 deep
2 O
U Bearing flushing DIN 3852
5)
M18× 1.5; 12deep 2 X
R
1
, R
2
Air bleed DIN 3852
5)
M18× 1.5; 12deep 2 X
R
1
Air bleed (LA1S only.) DIN 3852
5)
M22× 1.5; 15.5deep 2 X
R
2
Air bleed (LA1S only.) DIN 3852
5)
M27× 2; 19deep 2 X
A
1
Measuring high pressure DIN 3852
5)
M16 × 1.5; 12 deep 400 X
T
1
Control fluid drain DIN 3852
5)
M12 × 1.5; 12 deep 400 X
6)
X
3
Override DIN 3852
5)
M16 × 1.5; 12 deep 400 X
Y
3
External control pressure DIN 3852
5)
M14× 1.5; 12deep 40 X
X
1
Pilot pressure DIN 3852
5)
M14× 1.5; 12deep 40 O
X
4
Load pressure DIN 3852
5)
M14 × 1.5; 12 deep 400 O
M
1
Control pressure measurement DIN 3852
5)
M12 × 1.5; 12 deep 400 X
1) Center bore according to DIN 332 (thread according to DIN 13)
2) For notes on tightening torques, see instruction manual.
3) Depending on the application, momentary pressure peaks can
occur. Keep this in mind when selecting measuring devices and
fittings.
4) Only dimensions according to SAEJ518, metric fastening thread is
a deviation from the standard.
5) The spot face can be deeper than specified in the appropriate
standard.
6) For versions with a pressure controller or pressure cut-off, a drain
line is needed to relieve port T
1
to the reservoir.
O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Bosch Rexroth AG, RE 92202/02.2015
30 A7VO Series 63 | Axial piston variable pump
Dimensions, size 80
Dimensions [mm]
▼ LRD – Power controller with pressure cut-off ▼ LRDS – Power control with pressure cut-off and load sensing
D
LR
132
130
D
X
4
X
4
LR
130
265
327
161
151
6
▼ LRDH1 – Power control with pressure cut-off and stroke limiter ▼ LA1S – Power control with load sensing,
LA1S5 – Power control with load sensing, can be overridden on a
hydraulically proportional basis
D
LR
Y
3
X
1
Y
3
X
1
138
182
116
14 284 (X
1
)
279 (Y
3
)
130
290
82 102
118
157
189
171
289
209 (B)
210 (S)
46 17
34
B (S)
X
6
X
6
X
3
146
X
4
X
4
X
3
28
255
Port X
6
with version LA1S5 only
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 80
31
Dimensions [mm]
▼ DR/DRG – Pressure controller/pressure controller remotely
controlled
▼ DRS – Pressure controller with load sensing
DR
DRG
139 (DR)
125 (DRG)
DR
X
4
X
4
S
151
161
6
265
327
▼ HD1, HD1G – Proportional hydraulic control , positive control,
and variant with pressure cut-off, remotely controlled
▼ EP2 – Proportional control electric, positive control
A
1
A
1
X
3
X
3
X
1
Y
3
X
1
Y
3
240 114
287
92
113
241 (X
3
)
237 (A
1
)
212 (Y
3
)
207 (X
1
)
62
22 14
187
209
A
1
A
1
X
3
X
3
Y
3
Y
3
305 114
287
92
113
241 (X
3
)
237 (A
1
)
212 (Y
3
)
62
22 14
187
Bosch Rexroth AG, RE 92202/02.2015
32 A7VO Series 63 | Axial piston variable pump
Dimensions, size 107
Dimensions [mm]
Dimensions, size 107
LR – Power controller without power override
All of the variants of the controllers on pages 34 and 35 are shown for the clockwise direction of input rotation (view Y)
T
1
T
1
X
3
A
1
X
3
A
1
Y
R
1
R
2
A
S
B
U
X
3
A
1
S
170
18
37
46
150
41
40
1)
⌀160
-0.025
⌀90
39
7.5
14.6 max
25
12°30'
200
190
190
45°
45°
307
272
(A
1
)
289
(X
3
)284
(T
1
)286
17.5
57.2
25
36
88.9
7222
62
55
105
27.8
88
50.8
115
70
74
LR LR
View Y
Counter-clockwise rotation
Flange
ISO 3019-2
View Y
Clockwise rotation
1) To shaft collar
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 107
33
Dimensions [mm]
▼ Splined shaft DIN 5480 ▼ Parallel keyed shaft DIN 6885
Z - W40×2×18×9g P - AS12×8×63
45
37
M12 × 1.75
1)2)
⌀60
9.5
28
43
80
M12 × 1.75
1)2)
⌀60
⌀40
+0.018
+0.002
9.5
28
Key width 12
Ports Standard Size
2)
p
max abs
[bar]
3)
Status
A (B) Working port (high-pressure series)
fastening thread
SAE J518
4)
DIN 13
1 in
M12 × 1.75; 17 deep
400 O
S Suction port (standard series)
fastening thread
SAE J518
4)
DIN 13
2 1/2 in
M12 × 1.75; 17 deep
2 O
U Bearing flushing DIN 3852
5)
M18× 1.5; 12deep 2 X
R
1
, R
2
Air bleed DIN 3852
5)
M18× 1.5; 12deep 2 X
A
1
Measuring high pressure DIN 3852
5)
M16 × 1.5; 12 deep 400 X
T
1
Control fluid drain DIN 3852
5)
M12 × 1.5; 12 deep 400 X
6)
X
3
Override DIN 3852
5)
M16 × 1.5; 12 deep 400 X
Y
3
External control pressure DIN 3852
5)
M14× 1.5; 12deep 40 X
X
1
Pilot pressure DIN 3852
5)
M14× 1.5; 12deep 40 O
X
4
Load pressure DIN 3852
5)
M14 × 1.5; 12 deep 400 O
M
1
Control pressure measurement DIN 3852
5)
M12 × 1.5; 12 deep 400 X
1) Center bore according to DIN 332 (thread according to DIN 13)
2) For notes on tightening torques, see instruction manual.
3) Depending on the application, momentary pressure peaks can
occur. Keep this in mind when selecting measuring devices and
fittings.
4) Only dimensions according to SAEJ518, metric fastening thread is
a deviation from the standard.
5) The spot face can be deeper than specified in the appropriate
standard.
6) For versions with a pressure controller or pressure cut-off, a drain
line is needed to relieve port T
1
to the reservoir.
O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Bosch Rexroth AG, RE 92202/02.2015
34 A7VO Series 63 | Axial piston variable pump
Dimensions, size 107
Dimensions [mm]
▼ LRD – Power controller with pressure cut-off ▼ LRDS – Power control with pressure cut-off and load sensing
D
LR
138
134
D
LR
154
167
134
X
4
X
4
290 (X
4
)
352
▼ LRDH1 – Power control with pressure cut-off and stroke limiter
Y
3
X
1
Y
3
X
1
D
LR
144
189
122
300 (X
1
)
295 (Y
3
)
18
134
309
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 107
35
Dimensions [mm]
▼ DR/DRG – Pressure controller/pressure controller remotely
controlled
▼ DRS – Pressure controller with load sensing
DR
DRG
132 (DRG)
145 (DR)
X
4
S
DR
X
4
154
167
290
352
▼ HD1, HD1G – Proportional hydraulic control , positive control,
and variant with pressure cut-off, remotely controlled
▼ EP2 – Proportional control electric, positive control
A
1
X
3
X
1
Y
3
A
1
X
3
X
1
Y
3
252
221
122
306
100
119
259 (X
3
)
254 (A
1
)
225 (Y
3
)
220 (X
1
)
70
22 18
199
A
1
X
3
A
1
X
3
Y
3
Y
3
316 122
306
100
119
259 (X
3
)
254 (A
1
)
225 (Y
3
)
70
22 18
199
Bosch Rexroth AG, RE 92202/02.2015
36 A7VO Series 63 | Axial piston variable pump
Dimensions, size 160
Dimensions [mm]
Dimensions, size 160
LR – Power controller without power override
All of the variants of the controllers on pages 38 and 39 are shown for the clockwise direction of input rotation (view Y)
T
1
Y
R
1
R
2
U
X
3
A
1
T
1
S
LR
T
1
X
3
A
1
X
3
A
1
A B
S
LR
61.9
22
100 126
40
31.8
66
106.4
75
66.7
32
8478
47
160
55
46
193
27
39
14.9 max
7.5
⌀180
-0.025
⌀100
12°30'
331 (A
1
)
327 (X
3
)
28
40
1)
349
328 (T
1
)
310
45°
224
210
17.5
210
45°
View Y
Counter-clockwise rotation
Flange
ISO 3019-2
View Y
Clockwise rotation
1) To shaft collar
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 160
37
Dimensions [mm]
▼ Splined shaft DIN 5480 ▼ Parallel keyed shaft DIN 6885
Z – W45×2×21×9g P – AS14×9×70
50
42
M16 × 2
1)2)
⌀70
12
36
48.5
90
M16 × 2
1)2)
⌀70
⌀45
+0.018
+0.002
12
36
Key width 14
Ports Standard Size
2)
p
max abs
[bar]
3)
Status
A (B) Working port (high-pressure series)
fastening thread
SAE J518
4)
DIN 13
1 1/4 in
M14 × 2; 19 deep
400 O
S Suction port (standard series)
fastening thread
SAE J518
4)
DIN 13
3 in
M16 × 2; 24 deep
2 O
U Bearing flushing DIN 3852
5)
M22× 1.5; 14deep 2 X
R
1
, R
2
Air bleed DIN 3852
5)
M26 × 1.5; 16 deep 2 X
A
1
Measuring high pressure DIN 3852
5)
M16 × 1.5; 12 deep 400 X
T
1
Control fluid drain DIN 3852
5)
M12 × 1.5; 12 deep 400 X
6)
X
3
Override DIN 3852
5)
M16 × 1.5; 12 deep 400 X
Y
3
External control pressure DIN 3852
5)
M14× 1.5; 12deep 40 X
X
1
Pilot pressure DIN 3852
5)
M14× 1.5; 12deep 40 O
X
4
Load pressure DIN 3852
5)
M14 × 1.5; 12 deep 400 O
M
1
Control pressure measurement DIN 3852
5)
M12 × 1.5; 12 deep 400 X
1) Center bore according to DIN 332 (thread according to DIN 13)
2) For notes on tightening torques, see instruction manual.
3) Depending on the application, momentary pressure peaks can
occur. Keep this in mind when selecting measuring devices and
fittings.
4) Only dimensions according to SAEJ518, metric fastening thread is
a deviation from the standard.
5) The spot face can be deeper than specified in the appropriate
standard.
6) For versions with a pressure controller or pressure cut-off, a drain
line is needed to relieve port T
1
to the reservoir.
O = Must be connected (plugged on delivery)
X = Plugged (in normal operation)
Bosch Rexroth AG, RE 92202/02.2015
38 A7VO Series 63 | Axial piston variable pump
Dimensions, size 160
Dimensions [mm]
▼ LRD – Power controller with pressure cut-off ▼ LRDS – Power control with pressure cut-off and load sensing
D
LR
150
145
X
4
X
4
329 (X
4
)
392
D
LR
185
172
145
▼ LRDH1 – Power control with pressure cut-off and stroke limiter
Y
3
X
1
Y
3
X
1
D
LR
19
162
207
140
340 (X
1
)
334 (Y
3
)
145
351
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Dimensions, size 160
39
Dimensions [mm]
▼ DR/DRG – Pressure controller/pressure controller remotely
controlled
▼ DRS – Pressure controller with load sensing
DR
DRG
150 (DRG)
155 (DR)
X
4
S
DR
X
4
172
185
329
392
▼ HD1, HD1G – Proportional hydraulic control , positive control,
and variant with pressure cut-off, remotely controlled
▼ EP2 – Proportional control electric, positive control
A
1
X
3
X
1
Y
3
A
1
X
3
X
1
Y
3
278
248
137
348
120
139
294 (X
3
)
290 (A
1
)
253 (Y
3
)
249 (X
1
)
78
22 19
225
A
1
X
3
Y
3
A
1
X
3
Y
3
343 137
348
120
139
294 (X
3
)
290 (A
1
)
253 (Y
3
)
78
22 19
225
Bosch Rexroth AG, RE 92202/02.2015
40 A7VO Series 63 | Axial piston variable pump
Connector for solenoids
Connector for solenoids
DEUTSCH DT04-2P-EP04
Molded connector, 2-pin, without bidirectional suppressor
diode
There is the following type of protection with mounted
mating connector:
▶ IP67 (DIN/EN 60529) and
▶ IP69K (DIN 40050-9)
▼ Circuit symbol
▼ Mating connector DEUTSCH DT06-2S-EP04
Consisting of DT designation
1 housing DT06-2S-EP04
1 wedge W2S
2 sockets 0462-201-16141
The mating connector is not included in the scope of
delivery.
This can be supplied by Bosch Rexroth on request (material
number R902601804).
Note
If necessary, you can change the connector orientation by
turning the solenoid housing.
The procedure can be taken from the instruction manual.
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
Installation instructions
41
Installation instructions
General
At commissioning and during operation, the axial piston
unit must be filled with hydraulic fluid and air bled. This
must also be observed following a long standstill as the
axial piston unit can empty via the hydraulic lines.
Particularly in the installation position "drive shaft
upwards", filling and air bleeding must be carried out com-
pletely as there is, for example, a danger of dry running.
The pump housing is internally connected to the suction
chamber. A separate drain line from the case to the reser-
voir is not needed. Exception: For versions with pressure
controller or pressure cut-off, a drain line is needed to
relieve port T
1
to the reservoir.
To achieve favorable noise values, decouple all connecting
lines using elastic elements.
In all operating conditions, the suction line and the drain
line must flow into the reservoir below the minimum fluid
level. The minimum suction pressure at port S must not fall
below 0.8bar absolute during operation either.
When designing the reservoir, ensure that there is adequate
spacing between the suction line and the drain line. This
minimizes oil turbulence and carries out degassing, which
prevents the heated hydraulic fluid from being sucked
directly back in again.
Notes
▶ Axial piston units with electric components (e.g. elec-
tric controls, sensors) must not be installed in a reser-
voir below the fluid level.
▶ In certain installation conditions, an influence on the
control characteristic curves can be expected. Gravity,
dead weight and case pressure can cause minor shifts
in characteristics and changes in response time.
Key
R
1
/R
2
Air bleed port
U Bearing flushing
S Suction port
T
1
Control fluid drain
h
t min
Minimum required immersion depth (200 mm)
h
min
Minimum required spacing to reservoir base
(100 mm)
SB Baffle (baffle plate)
Installation position
See the following examples 1 to 4.
Additional installation positions are available upon request.
Recommended installation position: 1 and 2.
Installation position Air
bleeding
Filling
1 R
1
S
R
2
R
1
T
1
U
S
SB
h
min
h
t min
2 R
2
S
R
2
R
1
T
1
U
S
SB
h
min
h
t min
3 T
1
S
R
2
R
1
T
1
U
S
SB
h
min
h
t min
4 U S
R
2
R
1
T
1
U
S
SB
h
min
h
t min
42
Bosch Rexroth AG, RE 92202/02.2015
Bosch Rexroth AG
Mobile Applications
Glockeraustrasse 4
89275 Elchingen, Germany
Tel. +49 7308 / 82-0
info.ma@boschrexroth.de
www.boschrexroth.com
© This document, as well as the data, specifications and other information set
forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
reproduced or given to third parties without its consent. The data specified
above only serve to describe the product. No statements concerning a certain
condition or suitability for a certain application can be derived from this
information. The information given does not release the user from the
obligation of own judgment and verification. It must be remembered that our
products are subject to a natural process of wear and aging.
A7VO Series 63 | Axial piston variable pump
Project planning notes
Project planning notes
▶ The A7VO pump is designed to be used in open circuits.
▶ Project planning, installation and commissioning of the
axial piston units requires the involvement of skilled
personnel.
▶ Before using the axial piston unit, please read the corre-
sponding instruction manual thoroughly and completely.
If necessary, request them from Bosch Rexroth.
▶ Before finalizing your design, request a binding installa-
tion drawing.
▶ The specified data and notes must be observed.
▶ Pressure controllers are no protection from pressure
overload. A separate pressure relief valve is to be pro-
vided in the hydraulic system.
▶ Depending on the operating condition of the axial piston
unit (operating pressure, fluid temperature), the charac-
teristic may shift.
▶ Not all versions of the product are approved for use in a
safety function pursuant to ISO13849. Please consult
the responsible contact person at Bosch Rexroth if you
require reliability parameters (e.g. MTTF
d
) for functional
safety.
▶ Working ports:
– The ports and fastening threads are designed for the
specified maximum pressure. The machine or system
manufacturer must ensure that the connecting ele-
ments and lines correspond to the specified operat-
ing conditions (pressure, flow, hydraulic fluid, tem-
perature) with the necessary safety factors.
– The working ports and function ports can only be
used to accommodate hydraulic lines.
Safety instructions
▶ During and shortly after operation, there is a risk of
burns on the axial piston unit and especially on the
solenoids. Take appropriate safety measures (e.g. by
wearing protective clothing).
▶ Moving parts in control and regulation systems (e.g.
valve spools) may in certain circumstances become
stuck in an undefined position due to contamination
(e.g. contaminated hydraulic fluid, abrasion or residual
dirt from components). As a result, the hydraulic fluid
flow or build-up of torque of the axial piston unit will no
longer respond correctly to the operator's commands.
Even the use of different filter cartridges (external or
internal inlet filter) will not rule out a fault but merely
minimize the risk. The machine/system manufacturer
must test whether remedial measures are needed on the
machine for the application concerned in order to set
the consumer being driven to a safe position (e.g. safe
stop) and if necessary to ensure it is properly imple-
mented.
RE 92202/02.2015, Bosch Rexroth AG
Axial piston variable pump | A7VO Series 63
43
44
Bosch Rexroth AG, RE 92202/02.2015
Bosch Rexroth AG
Mobile Applications
Glockeraustrasse 4
89275 Elchingen, Germany
Tel. +49 7308 / 82-0
info.ma@boschrexroth.de
www.boschrexroth.com
© This document, as well as the data, specifications and other information set
forth in it, are the exclusive property of Bosch Rexroth AG. It may not be
reproduced or given to third parties without its consent. The data specified
above only serve to describe the product. No statements concerning a certain
condition or suitability for a certain application can be derived from this
information. The information given does not release the user from the
obligation of own judgment and verification. It must be remembered that our
products are subject to a natural process of wear and aging.
A7VO Series 63 | Axial piston variable pump