Parker 47 Series Installation manual

Bulletin MSG30-3245-INST/UK
Installation and
start-up information
Variable displacement
axial piston pump
PV series
Design series ≥ 47, PVplus
Eective: November, 2021
Supersedes: December, 2018
Visit our homepage
for additional support
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2
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
Note
This document and other information from Parker Hannifin GmbH & Co KG, its subsidiaries, sales
oces and authorized distributors provide product or system options for further investigation by
users having technical expertise. Before you select or use any product or system it is important
that you analyse all aspects of your application and review the information concerning the prod-
uct or system in the current product catalogue. Due to the variety of operating conditions and
applications for these products or systems, the user, through his own analysis and testing, is
solely responsible for making the final selection of the products and systems and assuring that
all performance and safety requirements of the application are met. The products are subject to
change by Parker Hannifin GmbH at any time without notice.
Contents........................................................................... Page
1. Installation and start-up............................................................................................... 3
2. Displacement adjustment............................................................................................ 6
3. Standard pressure compensator, code ...MMC ............................................................. 6
4. Standard pressure compensator with D03 interface, code ...MM1 .................................. 8
5. Standard pressure compensator for accessory mounting, code ...MMZ .......................... 8
6. Remote pressure compensator, codes ...MRC, ...MR1 and ...MRZ.................................. 9
7. Load sensing compensator, codes ...MFC, ...MF1 and ...MFZ ........................................ 9
8. Two spool load sensing compensator, codes ...MTP and ...MTK ....................................10
9. Horse power compensator, codes ...*L*, ...*C*.............................................................11
10. Compensator accessories..........................................................................................12
10.1 Pressure relief pilot valve, code PVAC1P... ....................................................................12
10.2 Multiple pressure pilots PVAC1E..., PVAC2P..., PVAC2E... und PVAC2M... .......................12
11. Trouble shooting guide...............................................................................................14
Note: The compensator ordering code is represented by
the last three digits of the pump ordering code (digit 13 to 15).

Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
3
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
1. Installation and start-up
For a safe and disruption free operation of any
machine or system a careful installation and start
up according to the manufacturers instructions
is mandatory.
Hydraulic systems can be designed for many
totally dierent functions and they require con-
sequently different start up procedures. The
hydraulic pump is in this respect only one, but
nevertheless a very important component of the
whole system.
A general start up instruction therefore can give
many helpful hints but it needs to be completed
by specific additions depending of the individual
nature of the system or power unit.
During installation and start up the following steps
need to be carried out carefully:
Visual inspection
Make sure that all components of the shipment
are complete, free of any damage, free of outside
contamination and properly protected against
ingression of contamination.
Cleanliness
Contamination of any kind is the enemy of any
hydraulic component. It is still the number one
cause for component failure. Therefore maxi-
mum care and cleanliness are required during
all handling and managing of parts that come in
contact with the hydraulic fluid. All ports of the
pumps and other components must be covered
until pipes or hoses are mounted to them. Per-
form assembly preferrably in a dry and dust free
room. Use only suitable tools.
Installation
Installation horizontal or vertical, avoid rigid con-
nection from pump to reservoir cover or frame
and to inlet and outlet piping to prevent excitation
of the whole system due to pump vibrations.
Suction port
Position to the side or to the bottom, max. fluid
velocity approx. v = 1.0 m/sec, cut suction pipe
inlet under 45°. Minimum distance from bottom
2 – 3 times diameter and, even at lowest fluid
level, approx. 200 mm below fluid level. Inlet pres-
sure, even during compensation, never should
drop below 0.8 bar (absolute).
Absolute gas tight connection (risk of cavitation,
noise). Air bubbles due to vacuum in the inlet
can destroy pumps within a short time due to
cavitation erosion. Suction pipe should be as
short as possible. Use only clean, low pressure
pipe, avoid sharp elbows and any restriction of
cross section.
The suction pipe must have access to clean,
cooled and filtered fluid, free of air bubbles. No
turbulences or high flow velocities should occur
at the tube inlet. Therefore position inlet as far
as possible away from return line and drain line.
Make sure that the fluid circulation in the reservoir
does keep return flow from suction pipe inlet. In
case of positive head use shut o valve in the inlet,
monitored with proximity switch or equivalent to
avoid start up of motor when valve is closed. When
installed into the reservoir use short suction pipe
with pipe end cut under 45°.
Pressure port
Select correct pressure rating for pipe, hose and
connectors. Take pressure peaks into account.
Dimension the piping according to the port size.
Prevent excitation of the system by using flexible
port connections.
Drain port
Always use highest possible drain port of the
pump. Drain port must be higher than pump
centerline or install additional air bleed line. Never
combine pump drain line with other return lines
and/or drain lines. Pump shall not be able to run
empty. Max. allowable case pressure ≤0.5 bar
(2 bar peak), also during compensation.
Use low pressure pipe/hose, as short as possible
and full cross section according to port dimen-
sion. Do not use elbows or sharp corners. When
drain port is on the side of the pump drain line
should have bridge higher than pump top (also
when installed in reservoir). Drain pipe must
end at least 200 mm below fluid level even at
lowest filling level. Never let drain flow go direct
into suction area of reservoir (temperature, air
bubbles). Max. length 2 m, otherwise use larger
pipe diameter than port size.

4
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
interface for
compensator
alternative drain
port L2
L1 drain port
pressure port
(outlet)
gage port,
ISO 6149-1;
M14x1.5
adjustment screw
lock nut
Port positions for PV (shown for clockwise
rotation, for ccw rotation ports are mirrored)
suction port
(inlet)
bearing flushing port, covered,
below pump
alternative drain port L3
case drain line from drain port
main flushing line to
alternative drain port 1, 2
bearing flushing line to
bearing flushing port L4
For side mounting (suction port facing down) use
alternative drain port 1 (cw rotation) or 2 (ccw
rotation).
Note: During operation of PV pumps of all sizes
under the following conditions:
Q ~ Qmax
pinlet < 2 bar absolute
Poutlet < 25 bar
(e.g. low pressure circulation) the drain flow can
change direction. Fluid is taken from the case
into the piston mainly through the decompression
orifice and across the slippers. There is a danger
that the pump case runs dry, the pump overheats
and the bearings lack of lubrication when the fluid
is removed from the pump case.
Therefore the drain pipe must be able to take
fluid from the reservoir. That means: The drain
line must end below fluid level, and a check valve
in the drain line is not permissible. If it has to be
installed for whatever reason the case needs to
be flushed with a flow of 10 – 15 % of the nominal
pump flow.

Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
5
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Flushing port
The PV pumps of design series 44+ are equipped
with three drain ports*. In addition all pumps are
equipped with a flushing port for front bearing
and shaft seal. The flushing flow can – depend-
ing on the actual working conditions – be used to
keep the pump case filled, to warm up the pump
(during cold temperature operation) or for better
heat dissipation e.g. for operation with HFC fluids
(water glycole) to keep the case fluid tempera-
ture in the allowed range. Permanent dead head
operation ( >15 min) either for pumps of frame
size 3 and larger (PV063 and higher) or at high
input speeds above 1,800 rpm requires flushing
of the pump case.
Flushing should be taken from the filter/cooling
circuit (e.g. pre-loaded return line). Recom-
mended flushing flows see following table.
PV016 – PV028 4 – 6 l/min
PV032 – PV046 5 – 8 l/min
PV063 – PV092 7 – 10 l/min
PV140 – PV180 9 – 12 l/min
PV270 – PV360 13 – 17 l/min
(flushing flow for front bearing: 10 – 15 % of the
total flushing flow)
Drive input
For direct drive use elastic coupling free of axial
and radial reaction forces. Please follow strictly
the instructions of the coupling supplier regarding
axial clearance, axial displacement and angular
tolerances. Couplings never shall be mounted
using a hammer. Threads in the shaft end allow
smooth mounting of the coupling.
The drive shaft should only carry true torque.
Contact Parker for allowable side loads or axial
forces.
PV pumps are normally for one direction of rota-
tion only. Therefore check rotation of drive motor
prior to installation.
Electrical interface
Check voltage, current, phase and connection
properties. Verify direction of motor rotation.
Fluid reservoir
The reservoir needs to meet all system require-
ments concerning design, size, location and
porting. Beside beeing reservoir for the hydraulic
fluid, the tank also supports heat dissipation,
air removal, water removal and contamination
sedimentation. Often the reservoir also is the
fundament for the motor pump unit. In this case
the separation of pump and remaining structure
by elastic means is mandatory to avoid noise and
vibration being induced into the frame work. The
reservoir needs to be carefully sealed against
ingression of contamination and water. A level
indicator and thermometer should be placed in
an easily accessible location.
Qleak
Qflush
L1
L4
L2/L3

6
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
2. Displacement adjustment
All axial piston pumps of the PV series are
equipped with an adjustable displacement limiter.
The servo piston stroke is limited at full displace-
ment by a screw, guided in the end cover plug
of the servo piston bore. The screw is protected
against unintentional adjustment by a self-sealing
lock nut (see figure on page 4).
Fluid content (general rule): stationary systems
3 to 4 times pump nominal flow, 1 times or even
smaller in mobile systems.
Filling of the system
Use only high quality mineral oil based fluids, like
HLP oils according to DIN 51524 part 2. For other
fluids (HFC, HFD, bio degradable or synthetic
fluids) please contact Parker and review the Hy-
draulic Fluids Information in Catalogue 2500/UK.
Operation viscosity should be 16 to 100 mm²/s,
optimum viscosity range is in the 20 to 40 mm²/s,
max. viscosity for short time up to 320 mm²/s.
Because of the possibly uncompatible ingredi-
ents fluids should not be mixed (separation of
fluid, reduction or loss of fluid properties).
Pay highest attention on cleanliness!
Fill system only via a filtration device. Use fil-
tration unit, when basic contamination of the
refill fluid exceeds class 10 according NAS 1638
(contamination level 21/19/16 according to
ISO 4406). Hydraulic fluid supplied in barrels
typically exceeds these contamination levels.
Filtration
Filtration is the most important factor to the op-
erational life of the hydraulic system. Statistical
analyses indicate, that contamination is by far
the most important reason for system or com-
ponent failure.
Use return line, pressure and/or bypass filtration.
Bypass filtration usually is most efficient. For
general purpose hydraulic systems with limited
requirements for operational life contamination
level 19/15 according to ISO 4406 should be
desired; corresponding filter rating: x = 25 µm
( b25≥75 ) according to ISO 4572.
Cleanliness level for systems with higher re-
quirements for operational life and functional
safety should be 18/16/13 according to ISO 4406;
corresponding filter rating x = 10 µm ( b10≥75 )
according to ISO 4572.
Use filter with indicator or electrical signal when
capacity limit is approached.
Suction filter should be avoided. Suction conditions
will be aected. Filter can be blocked and cause
cavitation and severe pump damage. When used, a
vacuum sensor with shut o function is mandatory.
Properly dimensioned breather rating ≤10 µm
should be used. Observe min. and max. fluid
level; consider exchange volume with cylinders
in the system.
Filling of pump case
Pump case must be filled via the drain port, to
ensure lubrication, sealing and smooth start up.
Start up
Check if all ports are properly connected ac-
cording to the specification, all connectors are
tightened and all adjustments are made.
Open suction valve (if installed)!
Switch system to free circulation or to lowest pres-
sure. Allow air bleeding for quick priming. Start
pump in tip mode operation until pump and all pipes
are filled and free from air bubbles. If pump does
not build up pressure, double check the installation.
Raise pressure setting only when all air is re-
moved. Let the pump work at reduced pressure for
5 – 10 min, check if all pipes and connections are
leak free and tight.
Observe reservoir: fluid level, built up of foam,
fluid temperature. When system is warmed up
first functional tests can be performed.
The factory setting of the displacement is accord-
ing to the nominal displacement of the pump.
An adjustment may only be made to a lower
displacement (turning screw in). An adjustment
to a higher than the nominal displacement can
destroy the pump.

Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
7
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
The adjustment of the compensating pressure is
performed for the standard pressure compensa-
tor directly at the compensator.
To adjust the pressure, the lock nut (SW 13) is to
be loosened and the adjustment spindle is to be
turned (screw driver).
Turning clockwise will increase the compensat-
ing pressure, turning counter-clockwise will
decrease the compensating pressure.
The compensating pressure can be adjusted in a
range from 15 to 350 bar (approx. 125 bar/turn).
By turning the pressure pilot cartridge housing
the compensator dierential can be adjusted.
It is factory set to 15±1 bar and should not be
changed (approx. 20 bar/turn).
Dierent compensator dierential settings can
cause instability or excessive power losses.
By using adapter kit PVCMCK** (below 47de-
sign) / PVCCK** (since 47 design) the standard
Size
Displacement change per mm (approx. cm³/U) Displacement change per turn (approx. cm³/U) Minimum adjustable displacement (approx. cm³/U)
P V 016 1.5 1.5 9
PV020 1.5 1.5 13
PV023 1.5 1.5 16
PV028 1.5 1.5 20
PV032 2.2 2.2 17
PV040 2.2 2.2 25
PV046 2.2 2.2 30
PV063 3.4 5.1 35
PV080 3.4 5.1 50
PV092 3.4 5.1 65
PV140 5.6 8.4 20
PV180 5.6 8.4 60
PV270 6.8 10.2 120
PV360 8.6 12.9 180
pressure compensator can be made remote
controllable. This adapter replaces one of the side
plugs. Adapters are available for G1/4, M14x1.5
ISO 6149-1 and 7/16-20 UNF.
See also the remarks in chapter 6.
3. Standard pressure compensator, code ...MMC
compensator dierential adjustment
pressure adjustment
lock nut
lock nut
Adjustment should only be made with the pump
working at full displacement (not compensated)
and at a low output. At full displacement the piston
area of the servo piston is under case pressure.
Opening the self-sealing nut will only cause a
negligible leakage under these conditions.
Turning the adjustment screw clockwise will re-
duce the pumps displacement. The table shows
the displacement change per mm resp. per turn
and the minimum adjustable displacement.
Note: All pumps are adjusted and tested after
assembly in our factory. Only the compensator
pressure needs to be adjusted. That is done on
the pilot valve spindle. No other adjustments on
the compensator or the pump is required. Only
after service or repair a basic adjustment needs
to be performed.

8
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
4. Standard pressure compensator with D03 interface, code ...MM1
The standard pressure compensator code ...MM1
has topside an NG6/Cetop 3/NFPA D03 interface
for the mounting of suitable pilot valves. This com-
pensator can for example be directly equipped
with a proportional pressure pilot valve for electri-
cal pressure setting (ordering code ...MMK, see
figure on page 10).
The pilot valve must be capable of pilot flows of ap-
prox. 1,2 l/min. Therefore a nominal flow range of
3 – 6 l/min is recommended. A too small as well
as a too large pilot valve can lead to unsatisfactory
compensator performance.
In addition the compensator can be equipped with
a directional control valve for stand-by (unload-
ing) functions (ordering code ...MMW, see figure
on page 10).
Please note: when mounting accessories (e.g.:
proportional pressure pilot valve) or external (re-
mote) control the integrated pilot valve first must
be turned in to avoid too early pressure limitation.
interface NG6 DIN 24 340
compensator dierential adjustment
lock nut
pressure adjustment
lock nut
5. Standard pressure compensator for accessory mounting, code ...MMZ
interface NG6 DIN 24 340
Version ...MMZ is designed especially for compen-
sator accessory mounting (ordering code PVAC...,
see chapter 12).
Because the accessory packages come with their
own pilot valves, this version has no integrated pilot
catridge to avoid unwanted interaction.
For more details on the dierent compensator
options see also the PV compensator spare parts
compensator dierential
adjustment
lock nut
manual for compensator design 47, Parker bulletin
PVI-PVC-47-GB.pdf.
Note:
Checking and adjusting the compensator dieren-
tial should always be done by using two pressure
sensors/gages. Measuring one pressure only
(pump outlet pressure) and assuming, that the
pilot pressure at fully unloaded pilot valve resp.
with unload proportional pilot valve is 0 bar can
lead to completely wrong adjustments.
The dierent pilot valves can cause even at the
nominal pilot flow (1,2 – 1,4 l/min) already signifi-
cant back pressures which add to the compensa-
tor dierential.
Only if the pilot pressure chamber is completely
unloaded (e.g.: when one of the side plugs is
removed or the DCV is in stand-by mode) it can
be assumed, that the pilot pressure is zero and
pump outlet pressure is equal to the compensator
dierential setting.

Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
9
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
6. Remote pressure compensator, codes ...MRC, ...MR1 and ...MRZ
The remote pressure compensators code ...MR*
are equipped with a remote control port. To this
port external pilot valves can be connected. The
distance between pump and pilot valve can be
up to 15 m. The pilot line should be designed, to
avoid pressure losses.
Especially at low environmental temperatures
a too narrow pilot line can result in a significant pilot orifice integrated pilot valve
pressure pilot chambercontrol spool
compensator dierential adjustment
lock nut
remote control port
lock nut
compensator pressure adjustment
The load sensing or flow compensator primarily
controls the pump output flow. To achieve this
the load pressure after a main stream throttle
valve (load sensing valve, not included in the
shipment of the pump) is connected to the load
sensing port of the compensator. The compensa-
tor control strategy is, to keep the pressure drop
constant across this main stream throttle valve.
The integrated pilot valve maintains a pressure
compensation when the adjusted max. pres-
sure is reached. The pilot orifice Ø 0,8 mm is
located in the load sensing port adapter. This
orifice replaces the orifice in the control spool of
the ...MM* and ...MR* compensators, because
pilot pressure is in the load sensing compensator
provided through the load sensing line.
Load sensing and pressure compensators only
dierentiate by the control spool and by the loca-
tion of the pilot orifice.
Beside the version shown above (code ...MFC)
also a version ...MF1 with a topside NG6 / D03
compensator dierential adjustment
lock nut
load sensing port
lock nut
compensator pressure adjustment
7. Load sensing compensator, codes ...MFC, ...MF1 and ...MFZ
pressure increase. The nominal pilot flow is in the
range of 1.2 to 1.4 l/min.
Beside the version shown above (code ...MRC)
also a version ...MR1 with a topside NG6 / D03
interface is available as well as a version ...MRZ
without integrated pilot valve for the use with
compensator accessories code PVAC... .
For the compensators with code ...MM* and
...MR* the pilot pressure pressure supply is
maintained through an orifice located in the
control spool.
interface is available as well as a version ...MFZ
without integrated pilot valve for the use with
compensator accessories code PVAC... .

10
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
The length of the load sensing line can be up to
15 m. If the line is longer than 5 m it has to be
considered, that low environmental temperatures
and high fluid viscosity can have a negative influ-
ence to the compensator performance.
The line should be designed to avoid any signifi-
cant pressure drop.
Factory setting for the load sensing pressure dif-
ferential is 10 bar ± 1 bar. This adjustment should
only be changed in exceptional cases.
The adjustment is possible by turning the pilot
valve housing after loosening the lock nut.
Please refer to the setting instructions on page 8.
All compensators described in chapters 3 – 6
can be shipped with a directional control valve
for stand-by operation (compensator codes
ends with..W) or with a proportional pilot valve
for electrical pressure adjustment (compensator
code ends with ..K)
Compensator code ...MMW with directional
control valve code D1VW002K*JW for stand-by
operation (24 VDC, normally open)
Compensator code ...MMK with proportional
pressure pilto valve code PVACRES-*K35
8. Two spool load sensing compensator, codes ...MTP and ...MTK
interface NG6, DIN24 340 for pilot valve
pressure control stage load sensing port
flow control stage
The two spool compensator, code ...MT* has
two separate compensator valves for flow (load
sensing) and pressure compensation.
The following port options are available for remote
pressure and load sensing compensators:
That results in a steeper pressure compensa-
tion curve, which can be beneficial in certain
applications.
The flow control stage has no integrated pilot
valve, because this would eliminate the eect of
the two spool control. The pressure stage has
no integrated pilot valve, because during flow
control the T port of the pressure compensator
is under control pressure. This would prevent the
pilot valve from opening.
With the adapter kit PVCCK.. the pressure
compensator can be made remote controlled.
On the topside interface any pressure pilot valve
can be mounted. See chapter 3 for requirements.
The factory setting of the flow compensator is
10 ± 1 bar, the adjustment for the pressure com-
thread and
port code
port thread
dimensions
1G 1/4 BSPP
37/16-20 UNF
8M14 x 1.5 ISO 6149-1

Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
11
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Depending on its type, the horse power compen-
sator consists of a remote pressure compensator
or a load sensing compensator in combination
with the horse power pilot cartridge. The open-
ing pressure of this pilot cartridge depends on
the actual displacement of the pump. At large
displacements the opening pressure is low. As the
displacement is reduced the opening pressure is
increased according to the form of the contour
sleeve in the pump. That leads to the desired con-
trol characteristic (constant input horse power).
That is achieved by having the pilot cartridge seat
being guided by the contour sleeve. This contour
sleeve is firmly connected to the servo piston. The
contour represents the desired input horse power.
The horse power pilot cartridge is internally con-
nected to the compensator valve. Compensator
valves for horse power compensated pumps dif-
fer from standard compensator valves only in the
fact, that a plug in a connecting hole is removed.
For a standard horse power compensator with
ordering code ...*L* a modified remote pressure
compensator is used. For a horse power compen-
sator with load sensing, code ...*C* a modified
load sensing compensator is used.
9. Horse power compensator, codes ...*L*, ...*C*
pensator is 15 ± 1 bar. These adjustments should
not be modified.
If dierent adjustments are required by the system
or by the load sensing valves used in the system,
see page 8 for setting instructions.
With ordering code ...MTP a manual adjustable
pressure pilot valve code PVAC1PM*S35 is
mounted on the elbow manifold.
With ordering code ...MTK a proportional pilot
valve code PVACREM-*K35 is mounted on top.
For electronic pressure control a suitable power
amplifier is required. We recommend the digital
modules PCD00... supplied by Parker HCD.
Because the two spool compensator has no
integrated pilot valves, for a stand-by function
the compensator accessory PVAC1EM*C**35,
including a directional control valve and a pilot
section, is required.
pilot cartridgecompensator valve
contour sleeve
adjustment spindle
lock nut
Partial section through a horse power controlled
pump
Horse power pilot cartridge

12
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
10. Compensator accessories
10.1 Pressure relief pilot valve, code
PVAC1P...
The pressure relief pilot valve code PVAC1P... is
optimally tuned for the requirements of the com-
pensator valves of the series PV. It has a mounting
interface NG6 according to DIN 24340 and can be
mounted directly on top of all compensator valves
with the topside mounting interface.
Such a valve is only necessary for the compensa-
tors with elbow manifold (...MT1 and ...UDR) and
for the versions without integrated pressure pilot
cartridge (compensator code ends with..Z). Al
other versions include an integrated pilot valve.
lock nut
set screw
After loosening the lock nut SW13 an adjustment
of the compensating pressure for the pump is
possible in a range of approx. 20 bar up to 350 bar.
The pressure pilot valve is also available with a
DIN lock.
10.2 Multiple pressure pilots PVAC1E...,
PVAC2P..., PVAC2E... und PVAC2M...
For multiple pressure pilots, codes PVAC2P...,
PVAC2E... and PVAC2M... a sandwich valve with
two direct-action pressure cartridge valves is used
to pilot the pump.
Adjustment A: tolerance compensation for opti-
mized performance; done at pilot cartridge.
Adjustment B: maximum pressure setting; done
at integrated pressure pilot valve.
Constant horse power curve with adjustment At the adjustment screw of the horse power pilot
valve a basic adjustment of the horse power com-
pensator can be made. After loosening the lock
nut (self sealing nut) the compensator control
curve can be moved by turning the adjustment
screw (adjustment A in the diagram left). This
adjustment, done to meet the required constant
input horse power curve, is already made during
the factory test and should be modified only in
exceptional cases.
To adjust the correct constant horse power curve
a measuring device is required. An output power
measurement requires pressure and flow meter-
ing. An input power measurement requires torque
and speed measurement or a measurement of
the electric motor current.
Note: For horse power control the load sensing
dierential is set to 15 ± 1 bar. Any change will
result in a deviation from the horse power setting.
Note: The setting is very sensitive, 0.1 mm
change of the spindle changes the pressure ap-
proximately 20 bar.

Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
13
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
For code PVAC2P... a single solenoid directional
control valve is included for pressure selection.
The valve switches between low pressure setting
and high pressure setting. During low pressure
both pilot cartridges are connected to the com-
pensator, in the high pressure setting (solenoid
energized) only the A-side cartridge is con-
nected. Therefore the B-side pilot needs to be set
for lower pressure. The directional control valve
series D1VW has spool code 006.
For code PVAC2E... for pressure selection a
two- solenoid DCV is included, which selects be-
tween low pressure setting, high pressure setting
and stand-by pressure. In neutral position both
cartridges are connected to the compensator
valve. The lower pressure defines the compensat-
ing pressure of the pump. When the A solenoid
(B-side) of the DCV is energized only the A-side
cartridge is connected; the (higher) pressure ad-
justed there defines the compensating pressure.
When solenoid B is energized the valve spool con-
nects all four ports. Then the spring chamber of
the compensator valve is directly relieved to the
case drain of the pump, the pump compensates
at minimum compensating pressure (stand-by).
The directional control valve series D1VW has
spool code 055. This spool code is used to avoid
a blocked spool position during transient.
This version is recommended, when during a
machine cycle the pressure is to be switched
between high and low.
For code PVAC2M... also a dual solenoid valve
is used. In neutral position all four ports are con-
nected. The compensator spring chamber is
releived to case drain, the pump is compensating
at min. compensating pressure (stand-by).
PTPTPTPTPT
p1p1p1
p2p2
(>p2)
AB
P T
AB
P T
AB
P T
PVACPPPVAC1P... PVAC2P...
(PVAC2E...)
PVAC1E... PVAC2M...
When energizing solenoid A (B-side) the spring
chamber is connected to the A-side pilot car-
tridge; the pressure adjusted here controls the
pump.
When solenoid B is energized the spring chamber
of the compensator is connected to pilot car-
tridge B; then the pressure adjusted on this car-
tridge defines the pump compensating pressure.
The DCV of series D1VW has spool code 002.
This version should be used, when stand-by op-
eration should be the default situation.
Code PVAC1E... is similar to code PVAC2P...,
with the exception, that only one pilot cartridge
is installed. In neutral position of the D1VW the
stand-by pressure is selected.
Additional information can be found in:
compensator spare parts manual PVI-PVC-UK-45
compensator accessories spare parts manual
PVI-PVAC-UK
pumps spare parts manuals PVI-***-UK-45 with
*** = BG1 to BG5 according to pump frame size.

14
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
11. Trouble shooting guide
Pump delivers no output flow.
Drive motor does not turn.
Reason Motor is not connected correctly or one of the three phases has failed.
Motor does not turn smoothly when pump is disconnected from pump.
Solution Check motor connections, check electrical power supply.
Reason Pump mechanically blocked. Motor turns smoothly when disconnected from pump.
Solution Send pump to factory for service.
Drive motor only turns at slow speed.
Reason Motor is not selected properly. In star circuit not enough torque.
Solution Start pump at unloaded system. Use motor with more horse power.
Reason Pump is hydraulically blocked. No function of compensator, no pressure relief valve.
Pump stops after e few turns.
Solution Check function of pump compensator (see below). Start pump at unloaded system.
Drive motor turns, pump does not turn.
Reason Coupling is not or not correctly mounted.
Solution Check coupling assembly and correct it.
Drive motor turns and pump turns.
Reason Wrong direction of rotation.
Solution Change direction of motor rotation.
Reason Fluid reservoir empty or not filled to level, suction line ends above fluid level.
Solution Fill reservoir to required level, if necessary increase suction pipe length.
Reason Suction line is blocked. E.g. by plugs, cleaning tissues, plastic-plugs.
Ball valve in the suction line closed. Suction filter blocked.
Solution Check suction line for free flow. Open valves in suction line. Valves should be
equipped with electrical indicator. Check suction filter.
Reason Suction line not gas tight, pump gets air into suction port.
Solution Seal suction line against air ingression.
Reason Pressure line / system is not able to bleed air out.
Solution 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 Standard pressure compensator is set to minimum pressure.
Solution Adjust compensator setting to desired pressure.
Reason Orifice in remote pressure compensator blocked.
Solution Make sure orifice Ø 0.8 mm in control spool is free and open.
Reason No pressure pilot valve connected to port PR.
Solution Install suitable pressure pilot valve and adjust it to the desired setting.
Reason Multiple pressure pilot selector valve is not energized. Pump works in stand-by.
Solution Energize selector valve solenoid.
Reason No load sensing line connected.
Solution Connect system load sensing port to compensator.
Reason Load sensing valve is closed or too small.
Solution Open load sensing valve, use larger valve size.
Reason Too much pressure drop between pump and load sensing valve.
Solution Make sure connection is wide enough and has not too much pressure drop.
Reason Dierential pressure at compensator is adjusted improperly (too low).
Solution Check differential pressure adjustment and correct it as described above.

Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
15
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
For additional questions, your need of spare parts or in case of service needs please contact:
Parker Hannifin Manufacturing Germany GmbH & Co KG
Pump & Motor Division Europe
Neefestr. 96
09116 Chemnitz
Tel.: +49-(0)371 / 3937-0
Fax: +49-(0)371 / 3937-488
Internet: www.parker.com/pmde
Reason Horse power compensator setting changed.
Solution Check setting of horse power compensator and correct it, if required.
Reason Proportional displacement control is not connected as required.
Solution Check wiring; connect according to installation manual for electronic module.
Reason Displacement transducer (LVDT) adjustement changed.
Solution Correct zero setting at displacement transducer.
Reason Electronic module has no supply power.
Solution Make sure module is powered with 22 – 36 V DC.
Reason Plug instead of orifice Ø 0.8 mm in the load sensing line to pump.
Solution Install orifice as required.
Reason Cylinder block lifts from valve plate due to excessive wear.
Solution Send pump to factory for service.
Pump does not compensate.
Reason No orifice is in load sensing line to compensator code MFC.
Solution Install orifice Ø 0.8 mm as discribed on page 9.
Reason No pressure pilot valve connected to compensator or valve is blocked.
Solution Connect pressure pilot valve to compensator, make sure valve opens as required.
Reason Load sensing line connected incorrectly (e.g. upstream of load sensing valve)
Solution Connect load sensing line downstream (actuator side) of load sensing valve.
Reason No or too low pressure at pump outlet port.
Solution 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 Compensator is blocked due to contamination.
Solution Clean hydraulic fluid, clean compensator valve.
Reason Cable to LVDT or proportional solenoid is interrupted.
Solution Check wiring and make sure cable is ok. Replace if necessary.
Compensator is unstable.
Reason Compenstor spool sticks, due to contamination of hydraulic fluid.
Solution Clean hydraulic system, clean compensator valve.
Reason Compensator dierential pressure changed (too low or too high).
Solution Adjust compensator differential pressure to required setting.
Reason Wrong pilot orifice or pressure pilot valve improperly selected.
Solution Select pilot orifice and pressure pilot valve as recommended.
Reason Dynamic critical system, e.g.: pressure compensator combined with pressure re-
ducing valve, load sensing (flow) compensator combined with flow control valve.
Solution Use remote pressure compensator instead of standard pressure compensator,
install orifice in load sensing line remote from compensator (as close as possible to
load sensing valve).

16
Parker Hannifin Manufacturing Germany GmbH & Co. KG
Pump & Motor Division Europe
Chemnitz, Germany
Axial Piston Pump
Series PV, series 47 and higher
Bulletin MSG30-3245-INST/UK
Installation manual
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 sucient for all applications
and reasonably foreseeable uses of the components or systems.
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Please contact your Parker representation for a detailed ”Oer 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
Parker Hannifin Manufacturing Germany GmbH & Co KG
Pump & Motor Division Europe
Neefestraße 96
09116 Chemnitz, Germany
Tel: +49 (0)371 - 3937 - 0 MSG30-3245-INST/UK
Fax: +49 (0)371 - 3937 - 488
Email: [e-mail] © Copyright 2021
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For additional information, spare parts or service requirements please contact: