Bulletin HY30-3254-INST/UK
Installation and setup
manual
Electro-hydraulic control
for serie PVplus
Pump design series 44-45-46,
compensator design series 45
Effective: March 1st, 2017
Supersedes: July 1st, 2015
Visit our homepage for additional support
parker.com/pmde
2
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
Notes:
The compensator / control ordering codes shown represent the last three digits in the
pump ordering code (digits 13 to 15).
Setup manual for electro hydraulic proportional controls for axial piston pumps, PV family
Contents Page
1. table of available electro hydraulical controls .......................................................................... 3
2. Proportional displacement control, code …FDV (old: FPV) .................................................... 3
3. Proportional displacement control with pressure compensation,
codes ...UDR, ...UDK (old: UPR, UPK) ................................................................................... 7
4. Proportional displacement control with closed loop pressure control,
code ...UDM (old: UPM) ........................................................................................................ 10
5. Preload valve for proportional controlled pumps, code PVAPVV... ........................................ 13
6. External pilot pressure supply ............................................................................................... 16
7. Quick pressure relief with quick unload valve, code PVAPSE* in
combination with controls codes ...UPS resp. ...UPQ ........................................................... 17
8. Preload and quick unload manifold PVAPVE* in combination with
compensator codes ...UPP resp. ...UPF .............................................................................. 19
9. Basic adjustment of displacement feedback and compensator valves ................................. 22
10.1 Connecting diagram for proportional displacement control; Code ...FDV. ............................. 24
10.2 Electrical connections and wiring of compensator and control Electronics .......................... 25
11.1 Connecting diagram for p/Q-control;
Codes ..UDR, ...UDK, ...UDM, ...UDS, ...UDQ, ... UDP und ...UDF. .................................................26
11.2 Connecting diagram for p-Q-control; codes ..UPR, …UPK, ...UPM, ...UPS, ...UPQ,
...UPP and ...UPF (cable descriptions see pages 28 and 29) ............................................... 27
Cable 1 from LVDT (displacement transducer) ..................................................................... 28
Cable 2 from pressure sensor (compensator codes ...UPM, …UPF, ...UPQ) ....................... 28
Cable 3 a/b to displacement control valve (displacement control) ........................................ 29
Cable 4 to proportional pressure pilot valve solenoid (not for compensator
code ...FDV, ...UDR, ...UDP, ...UDS [old: ...FPV, ...UPR, ...UPP, ...UPS]) ................ 29
12. Trouble shooting guide .............................................................................................................. 30
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
3
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
1. table of available electro hydraulical controls
FDV Function description
The proportional displacement control allows a
continuous variation of the pump displacement
according to an electrical input command. An
inductive position transducer (LVDT) measures
the position of the servo piston and provides an
information on the actual displacement (signal,
Electro hydraulical controls
Code
Control designs
F D V closed loop displacement control with PVCMD1FB*** valve, no pressure compensation,
standard design from 07.2015
F P V closed loop displacement control with with PVCF*PV** Ventil, keine Druckregelung,
standard design up to 06.2015
U D closed loop displacement control with PVCMD1FB*** valve, with pressure compensation,
standard design from 07.2015
U P closed loop displacement control with PVCF*PV** valve, with pressure compensation,
standard design up to 06.2015
option
R pilot operated pressure control, NG6 interface
K as option R, additional proportional pressure valve PVACRE***K** mounted
M as option K, additional pressure sensor PVACMS mounted for closed loop pressure
control
P pilot operated pressure control, NG6 interface, for pre load and quick unload manifold
F as option P for pre load and quick unload manifold, additional PVACMS and
PVACRE***K** mounted for closed loop pressure control
S pilot operated pressure control, NG6 interface, for quick unload manifold
Q as option S for quick unload manifold, additional PVACMS and PVACRE***K** mounted
for closed loop pressure control
pressure p
1
flow Q
displacement
Figure 1 pQ Diagram …FDV (old:FPV)
2. Proportional displacement control, code …FDV (old: FPV)
displacement) to the control electronic. The servo
piston is kept by the servo spring and the pump
outlet pressure on its annulus area at maximum
displacement. The larger piston area is pressurized
by the control valve.
Figure 2 and 3 show the circuit diagram of a pump
with this control.
4
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
S T
M
P1
P
AP
T
AP
T
S
U
Solenoid current,
Displacement
control valve
Solenoid A
Solenoid B
Signal,
displacement
Displacement control valve
Code PVCMD1FBD**
p1
p
A
The control valve contains a control spool, which
is moved by two proportional solenoids. The valves
hydraulic neutral point is given by the electronic
control module. According to the area ratio of the
servo piston, the control pressure p
A
is approxi-
mately 25 % of the pump outlet pressure p1.
Solenoid A is driven by the electronic module for
a flow command of 100%. The spool connects
thereby port A with the pump housing (Port T). The
oil out of the large piston area drains off, the pump
is swashing to maximum displacement. Solenoid
B is activated in case of 0% flow command. The
pump outlet pressure p1 on the large servo piston
area downstrokes the pump to minimum displace-
ment. This requires a pump outlet pressure p1 of
at least 20 bar.
Figure 2: Circuit diagram...FDV control
FDV - Function
If this pressure cannot be maintained, special ar-
rangements for a proper displacement control are
required (please refer to chapter 4 and 5). Without
an appropriate load pressure the pump will stay at
full displacement.
The ordering code for a single control valve is:
PVCMD1FB*** the first * indicates the mounting
option ( with interface plate / elbow manifold ). The
two * at the end indicate seal option and screws
option (For details please see the compensator
spare parts list PVI-PVC).
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
5
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
FPV - Function
T
T
P
B
D2
P
P
p
1
ST
A
A
Mp1
displacement control valve,
code PVCM*PV**
signal, displacement
solenoid current,
displacement control valve
Figure 3: Circuit diagram ...FPV control
The control valve contains a control spool, which
is moved by a spring and a proportional solenoid
into its control position. The control spool provides
a pressure divider circuit in combination with the
control orifice B
D2
between control port A and return
port L. This pressure divider circuit controls the
pressure pA. According to the area ratio of the servo
piston, the control pressure pA is approximately 25
% of the pump outlet pressure p1.
At nominal current to the solenoid (1,3 A) the
control spool is moved against the spring and
connects control port A with the pump case (port
T). The pump is working with full displacement,
set by the displacement adjustment screw. At no
current to the solenoid the control spool is moved
by the spring against the solenoid and connects
control port A with the pump outlet. The pump
outlet pressure p1 on the large servo piston area
downstrokes the pump to minimum displacement.
This requires a pump outlet pressure p1 of at least
15 bar. If this pressure cannot be maintained,
special arrangements for a proper displacement
control are required (see chapter 4 and 5). Without
an appropriate load pressure the pump will stay at
full displacement.
The ordering code for a single control valve is:
PVCM*PV**
The first * indicates the pump size:
A stands for PV016 - PV046
C stands for PV063 - PV092
E stands for PV140 – PV360
The two * at the end indicate seal option and screws
option (details see compensator spare parts list
PVI-PVC).
Electronic module PQDXXA-Z10 – Function
To control the proportional solenoid the electronic
module PQDXXA-Z10 is offered. This module is
able to control all PV sizes and all control option
described in the following manual. Figure 4 shows
this module from the outside, figure 5 the electronic
control circuit.
6
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
Circuit diagram
Figure 5: Circuit diagram for electronic module PQDXXA-Z10
diagnosis, displacement, 0...+10 V
ready, 24 V nominal
status I, 24 V nominal
diagnosis, pressure, 0...+10 V
10 V reference output
solenoid p-valve
(pressure pilot valve)
solenoid B Q-valve
(displacement control valve)
solenoid A Q-valve
(displacement control valve)
power supply
power supply
18...30 V
0
18...30 V
0
0 V
9
6
29
31
13
14
11
5
7
8
10
3
17
19
12
15
16
1
2
12 V
5 V
DC
DC
PWM
18
20
21
23
4
22
24
enable ramp, 24 V nominal
enable p/Q-control, 24 V nominal
enable power amplifier, 24 V nom.
connect to terminal 11, 0 V
displacement transducer, 4... 9 V
pressure command, (p
cmd
) 0... +10 V
or 4...20 mA
horse power 0... +10 V
command (L
cmd
) 0
pressure transducer 0... +10 V
or 4...20 mA
displacement cmd. (Q
cmd
) 0... +10 V
or 4...20 mA
µC
The modules are designed for snap track mount-
ing according to EN 50022. They require a power
supply of 18 - 30 VDC. The module is connected
to the LVDT (displacement feedback) and to the
proportional solenoid of the displacement control
valve according to the diagrams in chapter 9. A
detailed functional description of the module and
a installation instruction is given in bulletin
Bulletin HY30-3255-INST/UK
The electronic module provides a ramp function
for soft approach to different working conditions.
Beside that the working range of the pump can
be individually adjusted. It also provides diagnosis
signals to monitor pump and module functions. Both
proportional displacement controls FDV and FPV
do not include a pressure control / compensation.
The hydraulic circuit has to be protected with a
pressure relief valve, to avoid damage to the system
by too high pressures.
Figure 4: Electronic module PQDXXA-Z10
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
7
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
The compensator codes ...UDR (PVCMD1FBU** +
open NG6 pattern) / UPR (PVCM*PV** + open
NG6
pattern), ...UDK (PVCMD1FBU** + PVACRE***K**) /
UPK
(PVCM*PV** + PVACRE***K**) include a pressure
compensation, which can override the proportional
displacement control. This is achieved by combining
a second control valve (remote pressure compen-
sator) with the displacement control valve.
Figure 6 and figure 7 show the hydraulic circuit of
the UDK and UPK.
3. Proportional displacement control with pressure compensation,
codes ...UDR, ...UDK (old: UPR, UPK)
S T
M
P1
P
p
A
AP
T
AP
T
S
U
P
T
M
WV
B
P
B
D2
AP
T
AP P
P
T
X
Q
X
p
I
P
I
Q:A
I
Q:B
W
Q
W
p
Displacement control
Code PVCMD1FBU**
Pressure compensator
Stage, Code PVCM*U2**
Proportional pressure pilot
valve, Code PVACRE***K**
(not included with code ...UPR)
Figure 6: Hydraulic Circuit of the …UDR, …UDK control
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
I
Q:B
= solenoid current B, displacement control valve
I
P
= solenoid current, pressure pilot Valve
W
Q
= command, displacement
W
P
= command, pressure
8
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
Figure 7: Hydraulic circuit of the ...UPR, ...UPK control
X
Q
= signal, displacement
I
Q:A
= solenoid current, displacement control valve
I
P
= solenoid current, pressure pilot Valve
W
Q
= command, displacement
W
P
= command, pressure
proportional pressure
pilot valve, code:
PVACRE***K**
(not included with
code ...UPR)
pressure compensator
stage, PVCM*U2**
displacement control
stage, code:
PVCM*PV**
I
Q:A
I
P
X
P
X
Q
M
p1
WV
TW
Q
W
P
T
T
T
S
P
T
U
s
B
D2
M
M
AA
A
P
P
P
P
B
p
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
9
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
The position of the control spool of the pressure
compensator is controlled by the pressure drop
across the pilot orifice Bp and by the compensator
spring. The nominal control pressure difference is
factory-set to a value of 15 ± 1 bar.
As long as the pressure setting of the pilot valve
(in figures 6 and 7: proportional pressure valve
PVACRE***K**) is not yet reached, the control
valve spring keeps the control spool in the position
shown. The control port of the displacement control
valve is connected to the large servo piston area
and controls the position of the servo piston.
The displacement control operates as described
in chapter 2. The adjustment of the control pres-
sure is done between the control spool and control
orifice D
B1
.
When the set pressure of the pilot valve is reached,
this valve opens and control flow from the pump
outlet is passing the pilot orifice Bp and the pres-
sure pilot valve before returning to the pump drain
line. That creates a pressure drop across pilot
orifice Bp. If this pressure drop reaches the 15 bar
setting of the compensator, the control spool of the
pressure stage is in its control position.
That leads to a reduction of the pump displacement
in order to keep the pump outlet pressure constant.
As the displacement control wants to keep the
pump at the set displacement the proportional
solenoid is powered with nominal current. That con-
nects the control port of the displacement control
valve with the pump case (port T).
The control spool of the pressure stage now con-
trols the servo piston position by using the control
orifice B
D2
for pressure dividing. Pressure control is
achieved as with a standard remote compensator.
It is mandatory, that the displacement setting of the
displacement control stage is high enough, to cover
the flow requirements of the system, the pump and
the control valves to maintain the desired pressure.
The following valve is to be used with this module:
PVACRE***K**. Other valve models can lead to
instability problems or malfunction of the control.
This valve is designed for a nominal pressure of
350 bar. By using the MAX adjustment at the control
module, the input commend range can easily be
adjusted to any smaller nominal system pressure.
In this way also for these lower pressures full
resolution of the input command can be achieved.
For basic adjustment of the control valves and the
LVDT see chapter 10. For electrical connection and
cable requirements see chapter 11.
Note: Parker has decided for this design with a
separate hydraulic-mechanically operated remote
pressure compensator, which overrides the pro-
portional displacement control for three reasons:
1. Piston pumps of the PV series have a large servo
piston. That offers several advantages. On the other
hand the servo piston has a high flow demand for
compensation. A hydraulic mechanical pressure
compensator - as used here - can provide much
higher control flows, than a proportional directional
control valve used by other pump models, where
this valve also provides pressure control basing of
the signal of a pressure transducer.
2. The hydraulic-mechanical control valve „senses“
a pressure peak in the system, as the pressure acts
direct on the control spool. Depending on the actual
system pressure very high forces are available to
operate the spool. Therefore this control rarely will
tend to stick or malfunction, as proportional direc-
tional control valves may do under contaminated
fluid conditions.
3. The pressure control using a proportional pres-
sure control valve to pilot it, does not require a
pressure sensor at the pump outlet. Nevertheless
a closed loop pressure control can be offered if
required (see next chapter).
Function description UDR / UDK (old: UPR / UPK)
10
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
With compensator ordering code ...UDM /UPM a
pressure sensor and a proportional pressure valve
is combined with the remote pressure control stage.
That realizes a closed loop pressure control. It also
offers the option of an electronic horse power limita-
tion. The hydraulic circuit for these control option
are shown in figure 8 and 9. The pressure sensor
included in the shipment is of the Parker model
PVACMS (SCP01-600-24-06). Also included in the
shipment is a proportional pressure pilot valve of
the ordering code PVACRE***K**. The hydraulic
function is described in the recent chapter. There
are no differences except the pressure sensor.
S T
M
P1
P
AP T
AP T
S
U
P
T
WV
B
P
B
D2
AP T
AP
P
T
P
X
Q
X
P
I
P
I
Q:A
I
Q:B
W
Q
W
P
Displacement control valve
Code PVCMD1FBU**
Pressure compensator,
Code PVCM*U2**
Proportional pressure valve,
Code PVACRE***K**
P
U
Pressure sensor
SCP01-600-24-06
PVACMS*
4. Proportional displacement control with closed loop pressure control,
code ...UDM (old: UPM)
Figure 8: Hydraulic Circuit of …UDM control
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
I
Q:B
= solenoid current B, displacement control valve
X
P
= signal, pressure
I
P
= solenoid current, pressure pilot Valve
W
Q
= command, displacement
W
P
= command, pressure
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
11
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
Figure 9: Hydraulic circuit of the ...UPM control
X
Q
= signal, displacement
I
Q:A
= solenoid current, displacement control valve
X
P
= signal, pressure sensor
I
P
= solenoid current, pressure pilot valve
W
Q
= command, displacement
W
P
= command, pressure
pressure sensor,
code SCP01-600-24-06
PVACMS*
proportional pressure
pilot valve, code:
PVACRE***K**
pressure compensator
stage, PVCM*U2**
displacement control
stage, code:
PVCM*PV**
I
Q:A
I
P
X
P
X
Q
WV
S T
M
p1
T
U
s
p
U
T
T
M
B
D2
M
B
p
T
PP
P
P
P
A
A
A
W
Q
W
P
12
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
As shown in figures 8 and 9, the pressure sensor
is positioned in the pilot circuit. According to the
differential pressure adjusted at the compensa-
tor valve, the system pressure is higher than the
controlled pressure.
This concept avoids stability problems with the
control loop and the necessity of an external
adjustment of the control loop. On the other hand
there are additional measures necessary (e. g.:
command signal correction), if linearity between
input (command signal) and output (system pres-
sure) is required.
Figure 10 shows the typical behaviour of pilot
pressure p
R
and system pressure p
1
as function
of the input signal.
The digital control module offers the required sig-
nal correction to compensate for this effect. The
standard module parameter sets already include
this feature for the factory set pressure differen-
tialof 15 bar.
For other differential settings see module operating
instructions.
Figure 10: Pressures vs input signal
p1 = pressure at pump outlet, system pressure
(=p
P
+ ∆p)
∆p = compensator differential
(factory setting 15 bar)
p
P
= pressure at pilot valve, closed loop controlled
pressure
command U
P
system press. p
1
, pilot press. p
P
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
13
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
5. Preload valve for proportional controlled
pumps, code PVAPVV...
As already mentioned in chapter 1, a proportional
controlled variable displacement pump needs
always a minimum outlet pressure of approx.20 bar,
to down stroke the pump against the servo spring
force.
In some applications and especially at small dis-
placement settings that is not always given.
Two possibilities to solve this issue are described
in the following chapters:
If and external auxiliary pressure is available, this
can be used to control the pump at low outlet pres-
sure. This method is explained in chapter 6.
The other option is the use of a preload valve
(sequence valve).
Figures 11 and 12 are showing the hydraulic circuit
of a pump with ...UPR control, using a preload
valve. The preload valve is offered as a manifold,
that can directly be flanged to the pressure port of
the pump. The ordering code is PVAPVV*. The *
stands for the frame size of the pump, the screw
option and the seal material.
The preload valve is also available as slip in car-
tridge valve according to DIN 24 342.
Because of the pilot valve characteristic the open-
ing pressure p1 is approx. 20 bar. The port Mp1 can
be used to get under all working conditions a pres-
sure of 20 bar e. g. to pilot valves with external pilot
pressure supply. At approx. 25 bar system pressure
the valve is fully open (pressure drop < 1 bar).
S T
M
P1
AP
T
AP
T
S
U
M
WV
B
D2
A
P TAP
P
T
P
M
p1
p
P
p2
M
p1
X
Q
X
P
I
P
I
Q:A
I
Q:B
W
Q
W
P
preload valve,
Code PVAPVV*
B
P
P
T
T
Figure 11: Schaltschema des ...UDK Reglers mit Vorspannventil
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
I
Q:B
= solenoid current B, displacement control valve
X
P
= signal, pressure sensor
I
P
= solenoid current, pressure pilot Valve
W
Q
= command, displacement
W
P
= command, pressure
14
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
I
Q:A
I
P
X
P
X
Q
S
U
s
T
T
M
p1
M
p1
M
p2
W
Q
W
P
p
2
A
WV
A
A
T
T
T
T
M
M
B
D2
B
p
P
P
P
P
P
preload valve,
code: PVAPVV*
Figure 12: Hydraulic circuit of a pump with ...UPR control and preload valve
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
X
P
= signal, pressure sensor
I
P
= solenoid current, pressure pilot Valve
W
Q
= command, displacement
W
P
= command, pressure
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
15
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
Figure 13 shows the preload manifold for direct
mounting to the pressure port of the pump. It takes
screws with the length L to mount it to the pump.
L includes the length screwed into the pump end
cover.
Gage port p1, G1/4“
(preloaded pressure,
covered)
flanged ports ISO 6162: DN, PN;
fits to PV frame size BG; threads: M
gage port p2, G1/4“
(system pressure, covered)
Drain port L,
G1/4“
Note: All auxiliary
manifolds can also be
supplied in USversion
( UNC threads and
UNF ports) and with
ports according to ISO
6149
Input and output are designed as flange ports ac-
cording to ISO 6162 and fit direct to the according
PV frame size. Table 1 shows the main dimensions.
Figure 13: Outside view of the
preload manifold for direct
pump mounting. Outlet
optional to front (shaft side)
or to the rear
Table 1: Main dimensions - preload manifold
dimension BG1 BG2 BG3 BG4 BG5 BG6*
H[mm] 100 100 110 110 120 120
B[mm] 90 90 100 100 125 125
T[mm] 80 80 92 92 105 105
L[mm] 102 102 122(119*) 122(119*) 136 136
T1[mm] 116 116 137 137 155 155
for size PV016 - 028 PV032 - 046 PV063 - 092 PV140 - 180 PV270 PV360
DN[mm] 19 (3/4”) 25 (1“) 32 (1 ¼”) 32 (1 ¼”) 38 (1 ½”) 38 (1 ½”)
PN[bar] 400 400 400 400 400 400
M M10 M12 M12 (M14*) M12 (M14*) M16 M16
valve insert DIN E16 DIN E16 DIN E25 DIN E25 DIN E32 DIN E32
Q
nominal
[l/min] 160 160 300 300 550 550
*1) optional for PV063 - PV180, thread option 4; 2) L = clamping length for screws M
*2) for BG6 PV 360 the preload manifold of BG5 is used
16
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
6. External pilot pressure supply
The alternative solution is, to supply the control
circuit from an external auxiliary pilot pressure
supply circuit. The servo system is disconnected
from the pump outlet (plug inside of the pump gage
port). The pump outlet pressure is connected via a
check valve to the pilot pressure port.
An external source for auxiliary power (capable of
a flow of 20 - 40 l/min (depending on pump size)
at a pressure of 20 - 30 bar) is also connected via
a check valve to the pilot port.
Figure 9 shows the hydraulic circuit for this option.
As long as the pump outlet pressure is lower, than
the external supply pressure, the control circuit is
powered by the external source.
When the system pressure exceeds the auxiliary
pressure, the control is internally pressurized.
Please note:
- for pressures below the auxiliary pressure a pres-
sure control is not possible, because the control
senses the supply pressure.
- using this option the pump can be operated at
0 bar and dead head. Under these conditions the
pump does not provide drain flow and the pump
can overheat. Case flushing is necessary.
I
Q:A
I
P
X
P
X
Q
S
T
T
U
s
T
T
T
WV
M
p1
W
Q
W
P
A
A
A
M
M
B
D2
B
p
P
P
P
P
P
check valves
Figure 14: Hydraulic circuit of a pump with external pilot pressure supply
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
X
P
= signal, pressure sensor
I
P
= solenoid current, pressure pilot valve
W
Q
= command, displacement
W
P
= command, pressure
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
17
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
When working with proportional pressure controlled
pumps, the system pressure does not follow imme-
diately the input signal when switching to a lower
pressure setting.
Reason for this is, that a pump can supply flow but
cannot take flow to relieve a system. To decrease
the pressure in a system, compression volume has
to be taken away in order to reduce the pressure.
A pump only can be down stroked to deadhead
and pressure can only decrease due to leakage
and pilot power requirements. That can take up to
several seconds.
A direct mounted unload valve, Code R5V* (com-
plete code, technical parameter and dimensions
on request) solves this issue.
Figure 15 and 16 showing the hydraulic circuit of a
pump with p-Q control and the quick unload valve.
A 2-way SAE port mounted valve is inserted into
the pilot line to the pressure compensator stage.
The pilot flow to the proportional pressure pilot
valve has to pass two orifices in the poppet and in
the cover of this valve. The poppet is kept closed
with a 9-bar-spring.
The pressure compensator stage has in this case
not the control spool with the internal pilot orifice
(B
p
), because pilot flow is now supplied externally
through the quick unload poppet. The ordering code
for this compensator is PVCM*US**.
7. Quick pressure relief with quick unload valve, code PVAPSE* in
combination with controls codes ...UPS resp. ...UPQ
A
A
AA
T
T
TT
P
U
s
P
P P
P
P
P
P
S
T
T
P
P
MP
P
M
P1
R5V*
Pressure compensator
PVCM*US**
Quick unload valve
code: R5V*
D
P2
D
P1
9 bar
P
P
WV
T
M
X
Q
X
P
I
P
I
Q:A
I
Q:B
W
Q
W
P
B
D2
Figure 15: Hydraulic circuit of the ...UDS control with quick unload valve
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
I
Q:B
= solenoid current B, displacement control valve
X
P
= signal, pressure sensor
I
P
= solenoid current, pressure pilot valve
W
Q
= command, displacement
W
P
= command, pressure
18
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
I
Q:A
I
P
X
P
X
Q
S
T
M
p
D
P2
D
P1
W
Q
W
P
A
A
A
T
T
9 bar
T
T
T
M
M
B
p
P
P
P
WV
P
P
U
s
Mp
P
P
P
quick unload valve,
code: R5V*
Figure 16: Hydraulic circuit of an ...UPS control with quick unload valve manifold
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
X
P
= signal, pressure sensor
I
P
= solenoid current, pressure pilot valve
W
Q
= command, displacement
W
P
= command, pressure
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
19
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
The pump accessory manifold code PVAPVE*
combines preload and quick unload
function.
This manifold is flanged direct to the pressure port
of a PV pump. For functional description see the
last chapters.
To ensure a correct function under all working
conditions and to control immediately the load
pressure, the control pressure has to be taken after
the preload valve.
Sensing area of the control spool and spring cham-
ber are both to be connected by pipe or hose to the
8. Preload and quick unload manifold PVAPVE* in combination with compensator codes
...UPP resp. ...UPF
control ports of this manifold. The hydraulic circuit
diagrams in figure 17 and figure 18 display this.
Both functions are built into one manifold. Figure
19 shows this manifold and table 3 lists the main
dimensions.
The dimension L indicates the total length of the
mounting bolts and includes the length screwed
into the pump end cover.
The hydraulic connections between manifold and
pump compensator (ps and pp) are not included
in the pump shipment.
S T
M
p1
P
AP
T
AP
T
S
U
M
WV
B
D2
A
P
T
AP
P
P
T
D
P2
p
P
Mp
p
4 bar
p
P
D
P1
P
T
p
S
p
2
M
p2
p
S
p
M
p
1
T
1.0
VE
X
Q
X
P
I
P
I
Q:A
I
Q:B
W
Q
W
P
pre-load and quick unload manifold,
code: PVAPVE*
Figure 17: Hydraulic circuit of the ...UDP control with pre-load and quick unload manifold
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
I
Q:B
= solenoid current B, displacement control valve
X
P
= signal, pressure sensor
I
P
= solenoid current, pressure pilot valve
W
Q
= command, displacement
W
P
= command, pressure
20
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
I
Q:A
I
P
X
P
X
Q
S
T
M
p
Mp
2
Mp
P
Mp
1
W
Q
W
P
A
A
A
T
U
s
T
T
T
WV
P
P
PP
P
S
P
P
P
S
P
p
S
p
P
p
P
p
2
M
B
p
4 bar
D
P2
D
P1
pre-load and quick unload manifold,
code: PVAPVE*
Figure 18: Hydraulic circuit of the ...UPP control with preload and quick unload manifold
X
Q
= signal, displacement
I
Q:A
= solenoid current A, displacement control valve
X
P
= signal, pressure sensor
I
P
= solenoid current, pressure pilot valve
W
Q
= command, displacement
W
P
= command, pressure
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
21
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
Max. pressure
pilot valve
Flange ports ISO6162; DN,
PN; fit to PV, frame size BG; thread M
Cover and insert
DIN E NG2 quick
unload valve
Return port TE,
thread G
Alternative
outlet port P
2
,
thread G
2
Also available in
US-version ( UNC
threads and UNF
ports) and with
ports according to
ISO 6149
Gage port MpS, system
pressure, G1/4“
Port p system
pressure, G1/4“
Port p
P
, pilot pressure, G1/4“
Gage port MpP,
pilot pressure, G1/4“
Port p
1
,G1/4“, preloaded
pressure (covered)
Figure 19 Preload and quick unload manifold
Table 3: Main dimensions of the preload and quick unload manifold
dimension BG1 BG2 BG3 BG4 BG5 BG6*
B[mm] 125 150 157 157 190 190
H[mm] 105 130 130 130 154 154
T[mm] 80 80 92 92 105 105
L[mm] 105 103 121 121 137,5 137,5
B1[mm] 189 189 196 196 239 239
H1[mm] 166 166 166 166 199 199
T1[mm] 116 116 137 137 155 155
for size PV016 - 028 PV032 - 046 PV063 - 092 PV140 - 180 PV270 PV360
DN[mm] 19 (3/4”) 25 (1“) 32 (1 ¼”) 32 (1 ¼”) 38 (1 ½”) 38 (1 ½”)
PN[bar] 400 400 400 400 400 400
M M10 M12 M12 (M14*) M12 (M14*) M16 M16
valve insertNG1 DIN E16 DIN E16 DIN E25 DIN E25 DIN E32 DIN E32
Qnominal[l/min] 160 160 300 300 550 550
valve insertNG2 DIN E16 DIN E16 DIN E16 DIN E16 DIN E25 DIN E25
Qnominal[l/min] 160 160 160 160 300 300
G (port TE) ½” ½” ½” ½” ¾” ¾”
G2 (opt. outlet) ¾” 1“ 1 ¼” 1 ¼” 1 ½” 1 ½”
*1) optional for PV063 - PV180, thread option 4
*2) for BG6 PV360 the manifold of BG5 is used
Preload valve,
insert DIN E NG1
22
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
9. Basic adjustment of displacement feedback
and compensator valves
The inductive position transducer for displacement
feedback (LVDT) and the compensator valves are
factory preset and the settings are secured. New or
readjustment is only necessary after repair.
LVDT for displacement feedback:
Prior to a basic setting the adjustment of the ar-
mature length is to be checked / readjusted (see
figure 14). The exact dimension for this setting is
given in table 4:
Size Size Serie 45
1 PV016-028 73.5
2 PV032-046 73.5
3 PV063-092 75.0
4 PV140-180 75.0
5 PV270 75.0
6 PV360 75.0
Table 4: setting dimensions LVDT core
Figure 20: Setting dimension A for LVDT armature
The adjustment is secured by a removable glue.
A new setting again has to be secured to avoid
uncontrolled re-setting.
At full upstroked pump the mechanical adjustment
can be verified: The voltage at the LVDT output (pin
25 at the control module) should have a value as
given in the table below (± 0,2 V).
Size voltage size voltage
PV016 6.34 V PV063 7.12 V
PV020 6.06 V PV080 6.48 V
PV023 5.87 V PV092 6.10 V
PV028 5.50 V PV140 5.24 V
PV032 6.40 V PV180 3.83 V
PV040 5.70 V PV270 4.06 V
PV046 5.43 V PV360 4.06 V
Zero adjustment:
Next the zero adjustment of the LVDT is to be
checked. The LVDT and the solenoid of the
displacement control valve are to be connected
according to chapter 9 to the electronic control
module.
At running pump the command for the displacement
is to be set to 0 and the pressure relief valve of the
circuit / test rig has to be set to a pressure > 25
bar. All other connections / valves in the hydraulic
circuit are to be closed.
The pump then will down stroke to deadhead at
the minimum pump compensating pressure (10 ± 2
bar). By setting the zero adjustment potentiometer
(see figure 21) at the LVDT the diagnosis output of
the control module is to be set to 0 V, as the actual
displacement is the minimum displacement that can
be controlled. After adjustment the potentiometer
must be sealed again.
MAX-adjustment:
Next the command for the displacement is to be
increased, until the maximum displacement of the
pump is reached. That can either be monitored
by using the diagnosis output or a flow meter at
the pump outlet. The maximum displacement
is reached, if the displacement / flow does not
further increase, even when the input command
is still raised.
Protection plug
with o-seal
Zero adjustment
(sealed)
Do not touch!
electrical
connection
Figure 21: Iinductive positon transducer (LVDT),
outside view
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
23
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
If the actual value gets 10V before the pump is
full stroked, the LVDT parameter need to be reset.
If the actual value is below 10V and the pump is
already full stroked, the LVDT parameter need to
be reset as well.
Basic adjustment control valve PVCF*PV**:
To adjust the displacement control valve, the pro-
tection cap is to be removed (figure 22).
Figure 22: Displacement control valve
In a control situation the solenoid should draw ap-
prox. 60 % of its nominal current (nominal current
1,3 A; current in control situation 750 mA). Under
these conditions the solenoid provides approx.
50 % of its nominal force. That leads to a similar
response for on- and off stroking. By turning the
adjustment screw, this can be achieved. Clockwise
turning increases the solenoid current (force).
set screw (basic adjustment of control valve)
lock nut
Protection cap
Electrical connection
Figure 23: Proportional displacement control valve
with open set screw
After the adjustment the lock nut secures this set-
ting and the cap nut covers the set screw.
See also Installation and Start-Up Manual for
the digital control module PQDXXA-Z10.
Caution: the proportional displacement control,
code ...FDV (old: FPV) does not include a pres-
sure compensation. Therefore the hydraulic
circuit needs to be protected with a pressure
relief valve (safety valve). This valve has to be
layed out for full pump flow.
The remote pressure compensation stage of the
p-Q-controls codes ...UDR, ...UDK, ...UDM, ...UDS,
...UDP und ...UDF
(old: ...UPR, ...UPK, ...UPM, ...UPS, ... UPQ, ...UPP
und UPF), refered chapters 2 to 7, is adjusted as
follows.
Differential pressure adjustment
Lock nut
Figure 24: Proportional p-Q-control
The factory setting for the differential pressure is
15 ± 1 bar. For re-adjustment two pressure gages /
transducers are required. The differential pressure
to be adjusted is the difference between the two
pressures on both sides of the control spool of the
pressure compensator stage in a control situation.
For compensator codes ...UDP and UDF (old: UPP
and UPF) this is the difference between the pres-
sure p
F
on the sensing side and the pilot pressure
p
R
(see figure 18).
For all other codes it is the difference between
pump outlet pressure p
1
and pilot pressure p
R
.
The leads to a minimum compensation pressure
of 15 bar at completely unloaded spring chamber.
24
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
10.1 Connecting diagram for proportional displacement control; Code ...FDV.
Base parameter sets for FDV are available with module firmware PQDXXA-Z10-r03 and higher.
(cable details see page 28 and 29)
S T
M
P1
P
AP
T
AP
T
S
U
Cable 1
LVDT
Cable 3a
Solenoid A
Cable 3b
Solenoid B
displacement control valve,
Code PVCMD1FBD**
enable ramp, 24 V nominal
connect to terminal 11, 0 V
displacement cmd, (Q
cmd
) 0...+10 V
or 4...20 mA
0 V
displacement transducer, 4...9 V
18...30 V
0
18...30 V
0
9
6
29
31
13
14
11
5
7
8
10
3
17
19
12
15
16
1
2
18
20
21
4
22
24
23
12 V
5 V
DC
DC
PWM
µC
enable power amplifier, 24 V nom.
power supply
power supply
solenoid B Q-valve
(displacement control valve)
solenoid A Q-valve
(displacement control valve)
diagnosis, displacement, 0...+10 V
ready, 24 V nominal
status I, 24 V nominal
10 V reference output
flow Q
flow
pressure p
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
25
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
10.2 Electrical connections and wiring of compensator and control Electronics
Connecting diagram for proportional displacement control; code ..FPV
(cable description see page 28 and 29)
Cable 1 from LVDT
Cable 3a to proportional solenoid
displacement control valve,
code PVCF*PV**
enable ramp, 24 V nominal
flow Q
flow
pressure p
connect to terminal 11, 0 V
displacement cmd, (Q
cmd
) 0...+10 V
or 4...20 mA
0 V
displacement transducer, 4...9 V
18...30 V
0
18...30 V
0
9
6
29
31
13
14
11
5
7
8
10
3
17
19
12
15
16
1
2
18
20
21
4
22
24
23
12 V
5 V
DC
DC
PWM
µC
enable power amplifier, 24 V nom.
power supply
power supply
solenoid B Q-valve
(displacement control valve)
solenoid A Q-valve
(displacement control valve)
diagnosis, displacement, 0...+10 V
ready, 24 V nominal
status I, 24 V nominal
10 V reference output
Mp
P
T
T
P
P
A
A
TS
U
s
26
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
S T
M
P1
P
AP
T
AP
T
S
U
P
T
P
U
M
WV
B
P
B
D2
AP TAP PT
P
Cable 1
LVDT
Cable 3a
Q-valve
solenoid A
Cable 3b
Q-valve
solenoid B
Displacement control
stage
Code PVCMD1FBU**
Cable 4
p-valve
Cable 2
pressure sensor
Pressure compensator
stage, code PVCM*U2**
(with quick unload
manifold: code PVCM*US**,
with preload and quick
unload manifold: code
PVCM*UP**
Pressure sensor
PVACMS, SCP01-600-24-06
(for closed loop
pressure control and
horse power)
Proportional pressure pilotvalve
code PVACRE***K**
18...30 V
0
18...30 V
0
0 V
9
6
29
31
13
14
11
5
7
8
10
3
17
19
12
15
16
1
2
12 V
5 V
DC
DC
PWM
18
20
21
23
4
22
24
µC
connect to terminal 11, 0 V
displacement transducer, 4... 9 V
pressure command, (
p
cmd
) 0... +10 V
or 4...20 mA
horse power 0... +10 V
command (
L
cmd
) 0
pressure transducer 0... +10 V
or 4...20 mA
displacement cmd. (
Q
cmd
) 0... +10 V
or 4...20 mA
enable ramp, 24 V nominal
enable p/Q-control, 24 V nominal
enable power amplifier, 24 V nom.
diagnosis, displacement, 0...+10 V
ready, 24 V nominal
status I, 24 V nominal
diagnosis, pressure, 0...+10 V
10 V reference output
solenoid p-valve
(pressure pilot valve)
solenoid B Q-valve
(displacement control valve)
solenoid A Q-valve
(displacement control valve)
power supply
power supply
11.1 Connecting diagram for p/Q-control; Codes ..UDR, ...UDK, ...UDM, ...UDS, ...UDQ, ... UDP und ...UDF.
Base parameter sets for UD* are available with module firmware PQDXXA-Z10-r03 and higher.
(cable details see page 28 to 29)
Q
U
Q
U
P
p
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
27
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
11.2 Connecting diagram for p-Q-control; codes ..UPR, …UPK, ...UPM, ...UPS, ...UPQ,
...UPP and ...UPF (cable descriptions see pages 28 and 29)
Pressure sensor
PVACMS
SCP01-600-24-06
(for closed loop
pressure control and
horse power)
Pressure compensator
stage, code PVCM*U2**
(with quick unload
manifold: code
PVCM*US**,
with preload and quick
unload manifold: code
PVCM*UP**)
Displacement control
stage, PVCM*PV**
Cable 1 from LVDT
Proportional pressure pilot
valve code PVACRE***K**
Cable 3a to displacement
Control stage solenoid
Cable 4 to pressure
Valve solenoid
Cable 4 from pressure sensor
18...30 V
0
18...30 V
0
0 V
9
6
29
31
13
14
11
5
7
8
10
3
17
19
12
15
16
1
2
12 V
5 V
DC
DC
PWM
18
20
21
23
4
22
24
µC
connect to terminal 11, 0 V
displacement transducer, 4... 9 V
pressure command, (
p
cmd
) 0... +10 V
or 4...20 mA
horse power 0... +10 V
command (
L
cmd
) 0
pressure transducer 0... +10 V
or 4...20 mA
displacement cmd. (
Q
cmd
) 0... +10 V
or 4...20 mA
enable ramp, 24 V nominal
enable p/Q-control, 24 V nominal
enable power amplifier, 24 V nom.
diagnosis, displacement, 0...+10 V
ready, 24 V nominal
status I, 24 V nominal
diagnosis, pressure, 0...+10 V
10 V reference output
solenoid p-valve
(pressure pilot valve)
solenoid B Q-valve
(displacement control valve)
solenoid A Q-valve
(displacement control valve)
power supply
power supply
P
Mp
P
P
P
M
p
1
S
T
U
U
p
s
T
T
T
T
A
B
p
B
D2
B
D2
A
A
28
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
Cable 1 from LVDT (displacement transducer)
cable:4 x 0,5 mm², shielded, max. 50 m long
connector: round type M12 x 1; 5-pin
angled version
protection class IP 65 for
voltages up to 250 V
Cable 2 from pressure sensor (compensator codes ...UPM, …UPF, ...UPQ)
cable:3 x 0,5 mm², shielded, max. 50 m long
connector: according DIN 43 650, version AF, 4-pin
protection class IP 65 for voltages up to 250 V
Alternative: shielded cable with molded connector; in different length and variations.
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
29
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
Cable 4 to proportional pressure pilot valve solenoid (not for compensator
code ...FDV, ...UDR, ...UDP, ...UDS [old: ...FPV, ...UPR, ...UPP, ...UPS])
cable:3 x 1,5 mm², max. 50 m long
connector: according DIN 43 650, version AF, 3-pin
protection class IP 65 for voltages up to 250 V
PIN 20 solenoid A / PIN 23 solenoid B
PIN 18 solenoid A / PIN 21 solenoid B
cable 3 a/b: 3 x 1,5 mm², max. 50 m long
connector: according DIN 43 650, version AF, 3-PIN
protection class IP 65 for voltages up to 250V
Cable 3 a/b to displacement control valve (displacement control)
30
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
Installation and setup manual
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Bulletin HY30-3254-INST/UK
12. Trouble shooting guide
Pump delivers no output flow
Drive motor does not turn
reason
solution
Motor is not connected correctly or one of the three phases has failed.
Motor does not turn smoothly when pump is disconnected from pump.
Check motor connections, check electrical power supply.
reason
solution
Pump is mechanically blocked. Motor turns smoothly when disconnected from pump.
Send pump for service to factory.
Drive motor only turns at slow speed
reason
solution
Motor is not selected properly. Installed motor has not enough torque.
Start pump at unloaded system. Use motor with more horse power.
reason
solution
Pump is hydraulically blocked. No function of compensator, no pressure relief valve;
Pump stops after e few turns.
Check function of pump compensator (see below). Start pump at unloaded system.
Drive motor turns, pump does not turn
reason
solution
Coupling is not or not correctly mounted.
Check coupling assembly and correct it.
Drive motor turns and pump turns
reason
solution
Wrong direction of rotation.
Change direction of motor rotation.
reason
solution
Fluid reservoir empty or not filled to level, suction line ends above fluid level.
Fille reservoir to required level, if necessary increase suction pipe length.
reason
solution
Suction line is blocked. E. g. by plugs, cleaning tissues, plastic-plugs.
Ball valve in the suction line closed. Suction filter blocked.
Check suction line for free flow. Open valves in suction line.
Valves should be equipped with electrical indicator. Check suction filter.
reason
solution
Suction line not gas tight, pump gets air into suction port.
Seal suction line against air ingression.
reason
solution
Pressure line / system is not able to bleed air out.
Unload pressure port, unload system before start, bleed air from pressure line.
Pump does not build up pressure, but delivers full flow at low pressure
reason
solution
Standard pressure compensator is set to minimum pressure.
Adjust compensator setting to desired pressure.
reason
solution
No pressure pilot valve connected.
Install suitable pressure pilot valve and adjust it to the desired setting.
reason
solution
Multiple pressure pilot selector valve is not energized; Pump works in stand-by.
Energize selector valve solenoid.
reason
solution
Differential pressure at compensator is adjusted properly (too low).
Check differential pressure adjustment and correct it as described above.
Electro hydraulic proportional controls version 45 for
axial piston pumps, PV series
31
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Installation and setup manual
Bulletin HY30-3254-INST/UK
Trouble shooting guide
Pump does not build up pressure, but delivers full flow at low pressure
reason
solution
Horse power compensator setting changed.
Check setting of horse power compensator and correct it, if required.
reason
solution
Proportional displacement control is not connected as required.
Check wiring; connect according to installation manual for electronic module.
reason
solution
Displacement transducer (LVDT) adjustement changed.
Correct zero setting at displacement transducer.
reason
solution
Electronic module has no supply power.
Make sure module is powered with 22 - 36 V DC.
reason
solution
Cylinder block lifts from valve plate due to excessive wear.
Send pump to factory for service.
Pump does not compensate
reason
solution
No pressure pilot valve connected to compensator or valve is blocked.
Connect pressure pilot valve to compensator, make sure valve opens as required.
reason
solution
No or too low pressure at pump outlet port.
Pump outlet pressure must be at least 15 bar, because otherwise the bias spring
in the pump cannot be compressed.
Pump does not upstroke, sticks at zero displacement.
reason
solution
Compensator is blocked due to contamination.
Clean hydraulic fluid, clean compensator valve.
reason
solution
Cable to LVDT or proportional solenoid is interrupted
Check wiring and make sure cable is ok. Replace if necessary.
Compensator is unstable
reason
solution
Compenstor spool is sticking due to contamination of hydraulic fluid.
Clean hydraulic system, clean compensator valve.
reason
solution
Compensator differential pressure changed (too low or too high)
Adjust compensator differential pressure to required setting.
reason
solution
Wrong pilot orifice or pressure pilot valve improperly selected.
Select pilot orifice and pressure pilot valve as recommended.
reason
solution
Dynamic critical system, e. g.: pressure compensator combined with pressure
reducing valve, load sensing (flow) compensator combined with flow control valve.
use remote pressure compensator instead of standard pressure compensator.
For additional information, spare parts or service requirements please contact:
Parker Hannifin Manufacturing Germany GmbH & Co KG HY30-3254-INST/UK
Pump and Motor Division Europe
Neefestraße 96
09116 Chemnitz, Germany
Tel: +49 (0)371 - 3937 - 0 © Copyright 2017
Fax: +49 (0)371 - 3937 - 488 All rights reserved
Email: pmde-pqd-support@parker.com
parker.com/pmde
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED
HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY
DAMAGE.
This document and other information from Parker-Hannifin Corporation, its subsidiaries and
authorized distributors provide product or system options for further investigation by users having
technical expertise.
The user, through its own analysis and testing, is solely responsible for making the final selection
of the system and components and assuring that all performance, endurance, maintenance,
safety and warning requirements of the application are met. The user must analyze all aspects
of the application, follow applicable industry standards, and follow the information concerning the
product in the current product catalogue and in any other materials provided from Parker or its
subsidiaries or authorized distributors.
To the extent that Parker or its subsidiaries or authorized distributors provide component or
system options based upon data or specifications provided by the user, the user is responsible for
determining that such data and specifications are suitable and sufficient for all applications and
reasonably foreseeable uses of the components or systems.
Offer of Sale
Please contact your Parker representation for a detailed ”Offer of Sale”.
WARNING – USER RESPONSIBILITY
Position notification regarding Machinery Directive 2006/42/EC:
Products made by the Pump & Motor Division Europe (PMDE) of Parker Hannifin are
excluded from the scope of the machinery directive following the “Cetop” Position Paper on
the implementation of the Machinery Directive 2006/42/EC in the Fluid Power Industry.
All PMDE products are designed and manufactured considering the basic as well as the
proven safety principles according to:
• ISO 13849-1:2015
• SS-EN ISO 4413:2010
so that the machines in which the products are incorporated meet the essential health and
safety requirements.
Confirmations for components to be proven component, e. g. for validation of hydraulic
systems, can only be provided after an analysis of the specific application, as the fact to be
a proven component mainly depends on the specific application.
Dr. Hans Haas
General Manger
Pump & Motor Division Europe
