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HD – hydraulic control, pilot-pressure related
HD – Proportional control, hydraulic, pilot-pressure related
(see data sheet 92080)
(HD1T and HD1U is not available)
Stepless adjustment of the pump displacement according
to the pilot pressure. The control is proportional to the
specified pilot pressure setpoint value (difference between
X
X
).
1,
2
For version F with integrated boost pump, the control
is supplied internally with the control pressure from the
boost circuit. This saves using a separate control pressure
pump.
Optional:
▶ Control characteristics (HD1, HD2, HD3)
▶ Pressure control (HD.A, HD.B, HD.D)
▶ Remote pressure control (HD.GA, HD.GB, HD.G)
▶ Power control (HD1P)
▼ Characteristic curve
p
St
V
g
V
g max
p
St
Notice
The spring feedback in the controller and pump control
spring centering are no safety devices.
The controller can stick in an undefined position due
to internal contamination (contaminated hydraulic fluid,
abrasion or residual contamination from system
components). As a result, the flow in the axial piston
unit will no longer respond correctly to the operator's
specifications.
Check whether the application on your machine requires
additional safety measures to bring the driven consumer
to a safe position (immediate stop). If necessary, make
sure these are appropriately implemented.
V
g
V
g max
Axial piston variable pump | A4CSG Series 30
HD – hydraulic control, pilot-pressure related
▼ Circuit diagram
Example: Standard A4CSG 500 HD1...F..4M
B
M
K
M
A
B
1
A
K
4
M
K4
M
E3
E
3
M
U
K
AB
RE 92105-01-X-B2/2019.08.06, Bosch Rexroth AG
X
X
X
2
1
A
K
T
R(L)
S M
2
3
11
M
2
M
1
S
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