PVG 16 and PVG 32

Service Assembly/
Disassembly Guide

Service Manual
 PVG 16, PVG 32 Service Assembly/Disassembly Guide
Service Manual
Revisions

Revision History Table of Revisions

Date Page Changed Rev
Dec 2012 - New edition AA
Aug 2013 19 Torgue change in drawing AB

© 2013 Sauer-Danfoss. All rights reserved.

Sauer-Danfoss accepts no responsibility for possible errors in catalogs, brochures and other printed material.
Sauer -Danfoss reserves the right to alter its products without prior notice. This also applies to products already
ordered provided that such alterations can be made without affecting agreed specifications. All trademarks
in this material are properties of their respective owners. Sauer-Danfoss, the Sauer-Danfoss logotype, the
Sauer-Danfoss S-icon, PLUS+1™, What really matters is inside® and Know-How in Motion™ are trademarks of the
Sauer-Danfoss Group.
 Front cover:157-516, F301056, F301306 and F301302

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Table of Contents

General Information General Description........................................................................................................................................ 4

Features of PVG 16 and PVG 32............................................................................................................ 4
PVG Modules..................................................................................................................................................... 4
PVP, pump side modules......................................................................................................................... 4
PVB, basic modules................................................................................................................................... 4
Actuation modules.................................................................................................................................... 5
Remote control units................................................................................................................................ 5
Accessories........................................................................................................................................................ 5
PVG 16, PVG 32 and Open Circuit Load Sense Example.................................................................... 6
LS control with bleed orifice.................................................................................................................. 7
Load Sensing Controls................................................................................................................................... 8
Integral PC function.................................................................................................................................. 8
Load sensing system characteristics................................................................................................... 8
Pressure Compensated Controls............................................................................................................... 9
Pressure compensated system characteristics................................................................................ 9
Typical applications for pressure compensated systems............................................................ 9
Remote Pressure Compensated Controls.............................................................................................10
Remote pressure compensated system characteristics.............................................................10
Typical applications for remote pressure compensated systems..........................................10
Safety in Application....................................................................................................................................11
FMEA (Failure Mode and Effect Analysis) IEC EN 61508.............................................................11
Hazard and Risk Analysis ISO 12100-1 / 14121.............................................................................11
Control System Examples.....................................................................................................................12
PVG 32 – Mainly used in system with fixed displacement pumps.........................................14
PVG 100 – Alternative LS dump or pilot supply disconnect....................................................14
PVG 120 – Pump disconnect/block for variable pumps............................................................14
PVG 16 and PVG 32 with Open Center PVP (fixed displacement pump) .................................15
PVG 16 and PVG 32 with Closed Center PVP (variable displacement pump) .........................16

Assembly Instructions General Conditions.......................................................................................................................................17

Assembly..........................................................................................................................................................17

Testing Leak test............................................................................................................................................................22

Pressure setting after assembly...............................................................................................................23
Function testing.............................................................................................................................................24
Recommended equipment & hand tools to assemble PVG 16 and PVG 32.......................25

Test Report Test Report.......................................................................................................................................................26

Order Specification Order Specification.......................................................................................................................................27

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General Information

General Description PVG 16 and PVG 32 is a hydraulic load sensing valve designed to give maximum
flexibility, from a simple load sensing directional valve to an advanced electrically
controlled load-independent proportional valve.

The PVG 16 and PVG 32 modular systems make it possible to custom build up a valve
group to meet customer requirements. The compact external dimensions of the valve
remain unchanged whatever combination is specified.

Features of PVG 16 and • Load-independent flow control:

PVG 32 –– Oil flow to an individual function is independent of the load pressure of this function
–– Oil flow to one function is independent of the load pressure of other functions
• Good regulation characteristics
• Energy-saving
• Up to 12 basic modules per valve group
• Several types of connection threads
• Low weight
• Compact design and installation

PVG Modules PVP, pump side modules

• Built-in pressure relief valve
• Pressure gauge connection
• Versions:
–– Open center version for systems with fixed displacement pumps
–– Closed center version for systems with variable displacement pumps
–– Pilot oil supply for electrical actuator built into the pump side module
–– Pilot oil supply for hydraulic actuation built into the pump side module
–– Versions prepared for electrical LS unloading valve PVPX

PVB, basic modules

• Interchangeable spools
• Depending on requirements the basic module can be supplied with:
–– Integrated pressure compensator in channel P
–– Load holding check valve in channel P
–– Shock/suction valves for A and B ports
–– LS pressure limiting valves individually adjustable for ports A and B
–– Different interchangeable spool variants
–– All versions suitable for mechanical, hydraulic and electrical actuation

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General Information

PVG Modules (continued) Actuation modules

The basic module is always fitted with mechanical actuator PVM and PVMD, which can
be combined with the following as required:
__
• Electrical actuator (11 - 32 V --- ):
–– PVES – proportional, Super
–– PVEH – proportional, High performance
–– PVEH-F – proportional high performance, Float
–– PVEA – proportional low hysteresis
–– PVEM – proportional, Medium performance
–– PVEO – ON/OFF
–– PVEU – proportional, voltage control, 0-10 V
–– PVED-CC – Digital CAN controlled J1939/ISOBUS
–– PVED-CX – Digital CAN controlled CANopen X-tra safety
–– PVEP – PWM voltage controlled (11-32V)
–– PVHC – High Current actuator for PVG
• PVMR, cover for Mechanical detent
• PVMF, cover for Mechanical Float
• PVH, cover for Hydraulic actuation

Rated Pressure
Product Rated pressure
PVG 16 and PVG 32 with PVS 300 bar [4351 psi]
PVG 16 and PVG 32 with PVSI 350 bar [5076 psi]
PVG 16 and PVG 32 with PVBZ 250 bar [3626 psi]
PVG 16 and PVG 32 with HIC steel 350 bar [5076 psi]
PVG 16 and PVG 32 with HIC aluminium 210 bar [3046 psi]
PVG 120/32 with PVS 300 bar [4351 psi]
PVG 120/32 with PVSI 350 bar [5076 psi]
PVG 100/32 with PVS 300 bar [4351 psi]
PVG 100/32 with PVSI 350 bar [5076 psi]
Maximum continuous P-port pressure.

Accessories Remote control units

• Electrical remote control units:
–– PVRE, PVRET
–– PVREL
–– PVRES
–– Prof 1
–– Prof 1 CIP
–– JS120
–– JS1000 Ball grip
–– JS1000 PROgrip
–– JS2000
–– JS6000
–– JS7000
• Hydraulic remote control unit:
–– PVRHH

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General Information

PVG 16, PVG 32 and The pump receives fluid directly from the reservoir through the inlet line. A screen in the
Open Circuit Load Sense inlet line protects the pump from large contaminants. The pump outlet feeds directional
Example control valves such as PVG-32’s, hydraulic integrated circuits (HIC), and other types of
control valves. The PVG valve directs and controls pump flow to cylinders, motors and
other work functions. A heat exchanger cools the fluid returning from the valve. A filter
cleans the fluid before it returns to the reservoir.

Flow in the circuit determines the speed of the actuators. The position of the PVG valve
spool determines the flow demand. A hydraulic pressure signal (LS signal) communicates
demand to the pump control. The pump control monitors the pressure differential
between pump outlet and the LS signal, and regulates servo pressure to control the
swashplate angle. Swashplate angle determines pump flow.

Actuator load determines system pressure. The pump control monitors system pressure
and will decrease the swashplate angle to reduce flow if system pressure reaches the
PC setting. A secondary system relief valve in the PVG valve acts as a back-up to control
system pressure.

Pictorial circuit diagram

Double-acting cylinder
K/L Frame Series 45
open circuit axial
piston pump with
load sensing control
PVG 32
multi-section
load
sensing
control
valve

Bi-directional
gear motor

System pressure

Servo pressure
Heat exchanger
Filter Actuator pressure
Reservoir
Load sense pressure

Actuator return

Suction / case drain /

P101 658E
system return

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General Information

Load Sensing Controls The LS control matches system requirements for both pressure and flow in the circuit
regardless of the working pressure. Used with a closed center control valve, the pump
remains in low-pressure standby mode with zero flow until the valve is opened. The LS
setting determines standby pressure.

Typical operating curve Load sensing circuit

Q max
Flow

PC setting
0
0 Pressure
P101 968E

P101 967

Most load sensing systems use parallel, closed center, control valves with special porting
that allows the highest work function pressure (LS signal) to feed back to the LS control.
Margin pressure is the difference between system pressure and the LS signal pressure.
The LS control monitors margin pressure to read system demand. A drop in margin
pressure means the system needs more flow. A rise in margin pressure tells the LS
control to decrease flow.

LS control with bleed orifice

The load sense signal line requires a bleed orifice to prevent high-pressure lockup of the
pump control. Most load-sensing control valves include this orifice. An optional internal
bleed orifice is available, for use with control valves that do not internally bleed the LS
signal to tank.

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General Information

Load Sensing Controls Integral PC function

The LS control also performs as a PC control, decreasing pump flow when system
pressure reaches the PC setting. The pressure compensating function has priority over
the load sensing function.

Each section includes control schematic diagrams, setting ranges, and response /
recovery times for each control available. Response is the time (in milliseconds) for the
pump to reach zero displacement when commanded by the control. Recovery is the
time (in milliseconds) for the pump to reach full displacement when commanded by the
control. Actual times can vary depending on application conditions.

For additional system protection, install a relief valve in the pump outlet line.

Load sensing system characteristics

• Variable pressure and flow
• Low pressure standby mode when flow is not needed
• System flow adjusted to meet system requirements
• Lower torque requirements during engine start-up
• Single pump can supply flow and regulate pressure for multiple circuits
• Quick response to system flow and pressure requirements

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General Information

Pressure Compensated The PC control maintains constant system pressure in the hydraulic circuit by varying the
Controls output flow of the pump. Used with a closed center control valve, the pump remains in
high pressure standby mode at the PC setting with zero flow until the function is actuated.
This condition is often called a dead head condition.

Typical operating curve Simple closed-center circuit

Q max
Flow

PC setting
0
0 Pressure P101 166E

P101 965

Once the closed center valve is opened, the PC control senses the immediate drop in
system pressure and increases pump flow by increasing the swashplate angle.
The pump continues to increase flow until system pressure reaches the PC setting.
If system pressure exceeds the PC setting, the PC control reduces the swashplate angle
to maintain system pressure by reducing flow. The PC control continues to monitor
system pressure and changes swashplate angle to match the output flow with the work
function pressure requirements. If the demand for flow exceeds the capacity of the
pump, the PC control directs the pump to maximum displacement. In this condition,
actual system pressure depends on the actuator load.

Each section includes control schematic diagrams, setting ranges, and response /
recovery times for each control available. Response is the time (in milliseconds) for the
pump to reach zero displacement when commanded by the control. Recovery is the
time (in milliseconds) for the pump to reach full displacement when commanded by the
control. Actual times can vary depending on application conditions.

For additional system protection, install a relief valve in the pump outlet line

Pressure compensated system characteristics

• Constant pressure and variable flow
• High pressure standby mode when flow is not needed
• System flow adjusts to meet system requirements
• Single pump can provide flow to multiple work functions
• Quick response to system flow and pressure requirements

Typical applications for pressure compensated systems

• Constant force cylinders (bailers, compactors, refuse trucks)
• On/off fan drives
• Drill rigs
• Sweepers
• Trenchers

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General Information

Remote Pressure The remote PC control is a two-stage control that allows multiple PC settings.
Compensated Controls Remote PC controls are commonly used in applications requiring low and high pressure
PC operation.

Typical operating curve Closed center circuit with remote PC

Q max
Flow

Remote PC setting

PC setting
0
0 Pressure P101 969E

P101 966

The remote PC control uses a pilot line connected to an external hydraulic valve. The
external valve changes pressure in the pilot line, causing the PC control to operate at a
lower pressure. When the pilot line is vented to reservoir, the pump maintains pressure
at the load sense setting. When pilot flow is blocked, the pump maintains pressure at the
PC setting. An on-off solenoid valve can be used in the pilot line to create a low-pressure
standby mode. A proportional solenoid valve, coupled with a microprocessor control,
can produce an infinite range of operating pressures between the low pressure standby
setting and the PC setting.

Each section includes control schematic diagrams, setting ranges, and response /
recovery times for each control available. Response is the time (in milliseconds) for the
pump to reach zero displacement when commanded by the control. Recovery is the
time (in milliseconds) for the pump to reach full displacement when commanded by the
control. Actual times can vary depending on application conditions.

Size the external valve and plumbing for a pilot flow of 3.8 l/min [1 US gal/min].
For additional system protection, install a relief valve in the pump outlet line.

Remote pressure compensated system characteristics

• Constant pressure and variable flow
• High or low pressure standby mode when flow is not needed
• System flow adjusts to meet system requirements
• Single pump can provide flow to multiple work functions
• Quick response to system flow and pressure requirements

Typical applications for remote pressure compensated systems

• Modulating fan drives
• Anti-stall control with engine speed feedback
• Front wheel assist
• Road rollers
• Combine harvesters
• Wood chippers

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General Information

Safety in Application All makes and all types of control valves (incl. proportional valves) can fail, thus the
necessary protection against the serious consequences of function failure should
always be built into the system. For each application an assessment should be made for
the consequences of pressure failure and uncontrolled or blocked movements.

To determine the degree of protection that is required to be built into the application,
system tools such an FMEA (Failure Mode and Effect Analysis) and Hazard and Risk
Analysis can be used.

FMEA (Failure Mode and Effect Analysis) IEC EN 61508

FMEA is a tool used for analyzing potential risks. This analytical technique is utilized to
define, identify, and prioritize the elimination or reduction of known and/or potential
failures from a given system before it is released for production.
Please refer to IEC FMEA Standard 61508.

Hazard and Risk Analysis ISO 12100-1 / 14121

This analysis is a tool used in new applications as it will indicate whether there are
special safety considerations to be met according to the machine directives EN 13849.
Dependent on the determined levels conformity this analysis will detirmine if any extra
requirements for the product design, development process, production process or
maintenance, i.e. the complete product life cycle.

WWarning
All makes/brands and types of directional control valves – inclusive proportional valves –
can fail and cause serious damage. It is therefore important to analyze all aspects of the
application.
Because the proportional valves are used in many different operation conditions and
applications, the manufacturer of the application is alone responsible for making the
final selection of the products – and assuring that all performance, safety and warning
requirements of the application are met.
The process of choosing the control system – and safety levels – is governed by the
machine directives EN 13849 (Safety related requirements for control systems).

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General Information

Safety in Application Control System Examples

(continued) Example of a control system for manlift using PVE Fault monitoring input signals and
signals from external sensors to ensure the PLUS+1™ main controllers correct function of
the manlift.
B
Emergency stop /
Man present switch

A
D

Battery

A Main power supply

B Emergency stop/man present
switch
C HMI/Joystick control
D Movement detection sensors T P
G
E Main controller
F PVG 16 and PVG 32 control
valve
G Hydraulic deactivation

WWarning
It is the responsibility of the equipment manufacturer that the control system incorporated
in the machine is declared as being in confirmity with the relevant machine directives.

Electrical block diagram for above illustration

Main power supply Emergency stop and Motion detection sensor
(battery) Man present switch

Supply Main control valve

Main controller
Neutral Supply Signal
PVE
HMI / Joystick Detection Control Conditioning
Joystick
neutral switch
Signal Fault
Monitoring
Control
Signal Conditioning PVE fault output

Failure
Detection Hydraulic deactivation
P301 317

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General Information

Safety in Application Example of a typical wiring block diagram using PVEH with neutral power off switch and
(continued) fault monitoring output for hydraulic deactivation.

Emergency Man present

stop switch
A

PVE 1 Neutral detection / Supply control PVEH

1) with AMP
C signal connector
OFF
≠ Delay US
neutral UDC2

B Error

PVE 2 Neutral detection / Supply control PVEH

1) with AMP
C signal connector
OFF
≠ Delay US
neutral UDC2

B Error

E1 E2
2) Alarm
logic
Output
OR

3) Memory

A Emergency stop / man present switch

B PVE Faultmonitoring signals high=on
AND

C Neutral signal detection. low=off

D Hydraulic deactivation Hydraulic

Fault detection output D deactivation

P301 318

System Control Logic e.g. PLUS+1™ for signal monitoring and triggering signal for
deactivation of the hydraulic system.

WWarning
It is the responsibility of the equipment manufacturer that the control system incorporated
in the machine is declared as being in confirmity with the relevant machine directives.

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General Information

Safety in Application Example of fault monitoring for deactivation of the hydraulic system with extra fault
(continued) inputs using the PVE’s with DI (Direction Indication) function.
Emergency Man present
Stop switch

PVE 1 Neutral detection / Supply control PVEH-DI

1) AMP supply
signal connector
OFF
≠ Delay US
neutral UDC2

Error

PVEH-DI
AMP connector
2) Fault detection DI-A
DI-B 3) 4) DI-B
DI-A DI Output Delay Memory
US Logic Error

PVE 2 Neutral detection / Supply control PVEH-DI

1) AMP supply
signal connector
OFF US
≠ Delay
neutral UDC2

Error

PVEH-DI
AMP connector
Fault detection DI-A
2)
DI-B 3) 4)
DI-A DI Output Delay Memory
US Logic Error
OR

AND

high=on
System Control Logic e.g. PLUS+1™ for low=off

signal monitoring and triggering signal Hydraulic

Fault detection output deactivation
for deactivation of the hydraulic system.
P301 319

WWarning
It is the responsibility of the equipment manufacturer that the control system incorporated
in the machine is declared as being in confirmity with the relevant machine directives.

Other modules which can be used in connection with hydraulic deactivation at different
levels.

PVG 32 – Mainly used in system with fixed displacement pumps

• PVSK, commonly used in crane application - full flow dump
• PVPX, LS dump to tank

PVG 100 – Alternative LS dump or pilot supply disconnect

• PVPP, pilot oil supply shut off
• External cartridge valve connecting LS Pressure to Tank
• External cartridge valve connecting main Pressure to Tank

PVG 120 – Pump disconnect/block for variable pumps

• PVPE, full flow dump for the PVG 120
• External cartridge valve connecting LS Pressure to Tank
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General Information

PVG 16 and PVG 32 with When the pump is started and the main spools in the individual basic modules (11) are in
Open Center PVP (fixed the neutral position, oil flows from the pump, through connection P, across the pressure
displacement pump) • adjustment spool (6) to tank. The oil flow led across the pressure adjustment spool
PVB with Flow Control determines the pump pressure (stand-by pressure).
Spool
When one or more of the main spools are actuated, the highest load pressure is fed
through the shuttle valve circuit (10) to the spring chamber behind the pressure
adjustment spool (6), and completely or partially closes the connection to tank to
maintain pump pressure.

Pump pressure is applied to the right-hand side of the pressure adjustment spool (6).
The pressure relief valve (1) will open should the load pressure exceed the set value,
diverting pump flow back to tank.

In a pressure-compensated basic module the compensator (14) maintains a constant

pressure drop across the main spool – both when the load changes and when a module
with a higher load pressure is actuated.

With a non pressure-compensated basic module incorporating a load drop check valve
(18) in channel P, the check valve prevents return oil flow.

The basic module can be supplied without the load drop check valve in channel P for
functions with over-center valves.

The shock valves PVLP (13) with fixed setting and the suction valves PVLA (17) on ports
A and B are used for the protection of the individual working function against overload
and/or cavitation.

An adjustable LS pressure limiting valve (12) can be built into the A and B ports of
pressure-compensated basic modules to limit the pressure from the individual working
functions. Please see the sectional drawing on the next page for better understanding of
this example.

The LS pressure limiting valves save energy compared with the shock valves PVLP:
• with PVLP all the oil flow to the working function will be led across the combined
shock and suction valves to tank if the pressure exceeds the fixed setting.
• with LS pressure limiting valves an oil flow of about 2 l/min [0.5 US gal/min] will be led
across the LS pressure limiting valve to tank if the pressure exceeds the valve setting.

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General Information

PVG 16 and PVG 32 In the closed center version of PVP an orifice (5) and a plug (7) have been fitted instead
with Closed Center PVP of the plug (4). This means that the pressure adjustment spool (6) will only open to tank
(variable displacement when the pressure in channel P exceeds the set value of the pressure relief valve (1).
pump) • PVB with Flow
Control Spool In load sensing systems the load pressure is led to the pump control via the LS
connection (8).

In the neutral position the pump load sense control sets the displacement so that
leakage in the system is compensated, to maintain the set stand-by pressure.
When a main spool is actuated the pump load sense control will adjust the displacement
so that the set differential pressure (margin) between P and LS is maintained.

The pressure relief valve (1) in PVP should be set at a pressure of approx. 30 bar [435 psi]
above maximum system pressure (set on the pump or external pressure relief valve).

PVG 16 and PVG 32 with Closed Center PVP), PVB with Flow Control Spool
1 2
T P

3
M

4+5
LS A
8

12 7 B A 6 13

T T
11

10

LS B P LS A
14 16 B A 17 15

B
T T

19 18 20
V310106.A

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Assembly Instructions

General Conditions The specification sheet is compiled by the sales department for assembly of a new
PVG 16 and PVG 32 valve groups.

1. Before, during and after the assembly/disassembly of new PVG groups, absolute
cleanliness and care must be observed with regard to internal and external parts of
the units concerned.

2. Use non-volatile, petroleum based solutions for cleaning valves and/or modules.

3. Replace all parts considered likely to cause malfunction during subsequent testing.

4. Replace all loose O-rings (without exceptions) with new O-rings.

5. Lubricate all moving parts with hydraulic oil before assembly.

6. Lubricate all O-rings with petroleum jelly.

Refer to Service Manual 520L0515 for module designations, item and spare parts numbers.

Assembly The basic assembly sequence for PVG 16 and PVG 32 group is as follows:

1. Starting from the end plate place the module with (PVS, PVSP, PVSK ) the tie rod
bolts with the long threaded end pointing upwards ready for mounting of PVB
modules.

2. Place all lubricated O-rings in their respective grooves in the different modules.

3. Locate the basic modules (PVB) against the PVP (PVS, PVSP, PVSK) using the tie rod
bolts for alignment between the PVP and the PVB modules making sure the LS
shuttle valve is able to move freely.

4. Place the PVP (the PVS if a valve group has midinlet, or HIC) as the last module and
place the washers and nuts in position and hand tighten the valve.

5. Place the valve on a plain and level surface and tighten the assembly to a torque of
2.2 +0.3/-0 N•m (195 + 25/-0 lbf•in) using a 13 mm socket.
Max. level tolerance is 0.5 mm per section e.g. this means with 8 PVB sections max.
allowable height difference between the mounting holes would be 4 mm (this
would also be seen as a twist in the valve group assembly).

The valve assembly is to be assembled in accordance with the specification sheet.

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Assembly Instructions

Assembly (continued) 6. Install the spools (PVBS) into the PVB’s.

The assembled spool is marked with two four-digit numbers (see the figure below).
The number in the end of the spool where the plug is fitted, “B”, is the drawing
number of the spool and indicates that this end must face towards the “B” port of
the valve.
The other number, stamped on the side the PVBS pull rod “A”, is the module
number of the assembled main spool.
For spool assemblies with remote hydraulic spools, the centering spring is
different. The standard spring has a wire diameter of 1.9 mm. The remote hydraulic
spring (5-15 bar) has a wire diameter of 2.8 mm.

PVG 16 and PVG 32 are symmetrical, which allows for valve groups to be “option
mounted” This can be one by inserting the spools from the “B” port side and
mounting the PVM’s on the “B” port side of the PVB assembly.

(157B)7004 Markings pre 1998 (157B)7004

(157B)7004 Today’s spool (155L)7354
110XXXXX

A B

Relief grooves
V310342.A

7. Assemble the mechanical actuators to the valve (see the figure below). Before
fitting the PVM into engagement with the PVBS tension rod, the driver arm must
be pushed towards the PVB before engagement will occur. Once the driver arm is
engaged, rotate the mechanical actuator while pressing the PVM until the PVM is
flush against the PVB housing.
Tighten the four (4) mounting screws to a torque of 0.8 +0/-0.5 N•m [70 +0/-4.5 lbf•in]
using a 5 mm hex driver.

Assembly of PVE, electrical actuation Assembly of PVM, mechanical actuation

V310413.A

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Assembly Instructions

Assembly (continued) Assembly of PVG 16

PVEO
PVEA
PVEA-F

PVMD
PVP
F PVB
E PVH

PVS

C
D
PVM G
V310395.B

Assembly of PVG 32

P A
PVS

6 ±1 N•m
[53 ±9 lbf•in]

Q max: P A
Q max: P B

PVM
PVB
PVP

PVEH/PVES

PVEA

PVEO
P A
PVH
PVMD

PVMR/PVMF V310164.A
V310164.A

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Assembly Instructions

Assembly (continued) 8. Assemble the actuators. The manual cover PVMD or the remote hydraulic end cover
must be installed with the arrow pointing upwards towards the “A/B” port.

The PVE’s must be installed with the connectors pointing upwards towards the “A/B”
port. The torque for the four (4) mounting screws is 0.8 + 0/-0.5 N•m [70 +0/-4.5 in.
lbs.] using a 5 mm hex drive.

Common to all types of PVE’s is a small nylon filter in the “P” channel, under the
O-ring. Insure that the transducer stem on the PVE’s with closed loop feedback
interfaces with the end of the PVBS without any restrictions.

New and unused PVE units can be mounted without neutral adjustment to the LVDT
transducer. If an adjustment is required, contact the service department.
For control options with mechanical detent (PVMR) or mechanical float (PVMF)
function, please follow instructions in the previous section describing assembly of
the PVMD or PVH remote with reference to the below pictures.

157-224.11 157-225.11

157-226.11
157-227.11

* Spring Identification
PVMF Painted blue
PVMR Non-painted

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Assembly Instructions

Assembly (continued) For torque tighting values of the large hexagon (Y) with the detent assembly function,
please see the table below.

Tightening Torques and Widths Across Flats

X Y Z

With across flats

8 ±0.5 N•m 15 ±2 N•m 4 ±1 N•m

Tightening torque
[70 ±4.5 lbf•in] [135 ±20 lbf•in] [35 ±9 lbf•in]

PVMR, detent option without a neutral spring PVMF, mechanical float option

The valve assembly is to be assembled in accordance with the specification sheet.

9. Assemble the shock/check (PVLP) valves into the PVB’s. The top of the PVLP valve
is marked with the last three digits of the module code number. This number also
indicates the valve pressure setting @ 15.1 I/min [4 US gal/min]. Be careful not to
swap plugs and valves. The PVLA module carries no markings. The torque for the
plug is 4.0 ± 0.3 N•m [355 ± 25 lbf•in].

10. Issue/attach label with PVG code no.

for the valve assembly.

PVP PVEH/
PVES

PVLP/PVLA PVEA
E F PVB
PVBZ PVEO

PVS PVH
B
A PVMD

PVMR/
PVMF

G
C

PVM G V310165.A
V310165.A

L1104530 • Rev AB • Aug 2013 21

 PVG 16, PVG 32 Service Assembly/Disassembly Guide
Service Manual
Testing

Leak test After all components have been assembled and tightened to the proper specifications, a
leak test with compressed air must be performed.
1. Block off all “A” and “B” ports with steel plugs.

2. Block off the “P” port with a steel plug in the PVP. Screw the compressed air
connection into the “T” port. (see the figure below).

Block diagram
6.4 ± 1 bar
[93 ± 14.5 psi] A B A B A B
T

LX
P

PVP LS PVB PVB PVB PVS/I

6.9 bar [100 psi]

V310343.A

3. Apply compressed air at 6.9 bar [100 psi] for 5 minutes. At the same time, activate all
PVM control levers in order to fill fill all channels, chambers and cavities with an air.

4. Shut off the compressed air so that pressure is confined in the entire valve.
The permissible pressure drop in the valve is 0.5 bar [7 psi] per minute maximum.
Small leaks can be traced by pouring a small amount of oil onto the place where the
leak is thought to be present.

5. Try correcting small leaks by retightening the assembly. Large leaks usually indicate
forgotten or squeezed O-rings.

22 L1104530 • Rev AB • Aug 2013

 PVG 16, PVG 32 Service Assembly/Disassembly Guide
Service Manual
Testing

Pressure setting after All relief valves must be set with a gauge located in the gauge port of the PVP.
assembly
Groups with CLOSED CENTER PVP’S can be tested as assembled for all pressure relief
settings.

Groups with OPEN CENTER PVP’S and PVB’S with shock valves (PVLP) and LSA/LSB valves
with opening pressure lower than the pressure setting in the PVP. The PVP must be
modified temporarily to CLOSED CENTER. After the relief settings are made, the PVP
must be corrected to OPEN CENTER. All other with OPEN CENTER PVP’S can be tested as
assembled.

The PVP pressure relief valve and LSA/LSB pressure relief valves must be set by applying
oil pressure on the “P” port in the PVP. The “T” port must be connected to tank.
All “A” and “B” ports must be blocked off with steel plugs.

The quantity of oil supplied to the valve assembly must be at least 15 l/min [4 US gal/min].

The CLOSED CENTER PVP module can be set by applying pressure to the “P” port.

The OPEN CENTER PVP module can be set by applying pressure to the “P” port and
activating the spool in the A or B direction dead headeding the A or B port.

LSA/LSB valves must be set one at a time by activating the spool in the PVB section in the
direction of the LS valve to be adjusted.

It is assumed that the PVP module has a higher setting than the LSA/LSB valves.

Adjustment of the relief valve is accomplished by using a 4 mm hex wrench.

For relief valve version and location please see the figure below.

L1104530 • Rev AB • Aug 2013 23

 PVG 16, PVG 32 Service Assembly/Disassembly Guide
Service Manual
Testing

Function testing Function testing insures the correct dynamic manual and electrical operation of the
PVG 16 and PVG 32 valve assembly. This test should be performed after completing the
pressure adjustments.

Each section of the assembly must be tested:

1. With the pump connected as described in the “PRESSURE SETTING AFTER ASSEMBLY”
section, remove the plugs from the section to be tested. Connect the “A” port of the
valve to the rod end of the cylinder and the “B” port to the base end of the cylinder
(see the figure below).
Workport PVLP Pressure Measurement
32 to 350 bar [464 to 5075 psi]

Inlet Pressure Measurement

30 to 350 bar
[435 to 5075 psi]

P A B A B A B

PC Pump 14 l/min PVP LX

[3.4 US gal/min]

T LS PVB PVB PVB PVS/I

V310340.A

2. Shift the control lever of the tested section towards the valve and observe cylinder
retraction. Shift the same control lever away from the valve and observe cylinder
extension. Repeat several times. On valve groups with PVM’s on the “B” side, the
cylinder movement will be opposite when shifting the handle in the same direction.

3. Check the spool travel smoothness in both directions.

4. Check the metering of the spool in both directions. Can you control the speed of
the cylinder/motor, slow/fast?

5. Check to see if the LS signal at the PVP drops off, when the spool is in the neutral
position. This signal also should not build up pressure in the neutral position.

6. Shift the spool to one direction manually and let go of the control lever. The valve
should center itself. If the control lever sticks in any position, check for binding of
the spool. This is to be checked in both directions.

24 L1104530 • Rev AB • Aug 2013

 PVG 16, PVG 32 Service Assembly/Disassembly Guide
Service Manual
Testing

Function testing 7. Utilizing a controller package, connect the EL-PLUG connector to the PVE. Set the
(continued) controller to the corresponding PVE. Insure that the proper voltage and joystick
are being used. Similar to manual testing of the valve, eclectically shift the valve to
allow flow out the “A” port.

Check to see if the PVM control level shifts in the correct direction. This should also
be done in the “B” direction. Check to insure that once the controller is not activated
the valve centers itself. Observe that the spool responds to any change in the signal
from the joystick. Any change in position of the joystick should relate to a change in
the PVM control lever. Check the metering of the PVEM/H’s.

8. After all sections have been tested, insure that all relief valves are adjusted correctly.
Refer to the “PRESSURE SETTING AFTER ASSEMBLY” section for any adjustments.

9. Remove all steel plugs, fittings and hoses. Drain the oil from the valve group. Install
plastic plugs in all ports & rubber cap (155L6377) over all pressure adjustments.

10. A certified PVG valve test report must be completed & accompany every valve, e.g.
see PVG 32 PROPORTIONAL VALVE TEST REPORT on the next page.

Sections with open ported spools will experience cylinder extension in the neutral
position.

Recommended equipment and hand tools to assemble PVG 16 and PVG 32:
• Socket driver, Allen wrench = 2.5, 3, 4, 5, 6, 8 mm.
• Sockets = 3/8 drive deep well 13 mm.
• Combo – wrenches = 10, 13 mm
• Torque wrench = 3/8 drive 0 – 10 N•m [0-885 in. lbs.]
• Ball driver hex = 4, 5, 6, 8 mm
• Plastic hammer

L1104530 • Rev AB • Aug 2013 25

 PVG 16, PVG 32 Service Assembly/Disassembly Guide
Service Manual
Test Report

Test Report

26 L1104530 • Rev AB • Aug 2013

 PVG 16, PVG 32 Service Assembly/Disassembly Guide
Service Manual
Order Specification

Order Specification

Subsidiary/Dealer PVG No.

Customer Customer Part No.
Application Revision No.
Section A-Port B-Port
v Function v Extra Features v
157B 157B
0
157B p= bar 157B
a 157B 157B 157B 16 157B c
1 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

2 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

3 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

4 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

5 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

6 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

7 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

8 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

9 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

10 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

11 b 157B LSA bar LSB bar 157B b

a 157B 157B 157B 16 157B c

12 b 157B LSA bar LSB bar 157B b
157B 157B
a 157B 157B 157B 16 157B c
13 b 157B LSA bar LSB bar 157B b

14 End section 157B

15 PVAS section 157B
"Reserved for Painting" 157B
Comments:

Filled in by: Date:

L1104530 • Rev AB • Aug 2013 27

Products we offer: Sauer-Danfoss is a global manufacturer and supplier of high-
quality hydraulic and electronic components. We specialize in
• Bent Axis Motors providing state-of-the-art technology and solutions that excel in
the harsh operating conditions of the mobile off-highway market.
• Closed Circuit Axial Piston Pumps
Building on our extensive applications expertise, we work closely
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with our customers to ensure exceptional performance for a broad
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Sauer-Danfoss – Your Strongest Partner in Mobile Hydraulics.
• Hydraulic Power Steering
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• Joysticks and Control Handles
Go to www.sauer-danfoss.com for further product information.
• Microcontrollers and Software
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• Orbital Motors Wherever off-highway vehicles are at work, so is Sauer-Danfoss.
• PLUS+1™ GUIDE
We offer expert worldwide support for our customers, ensuring
• Proportional Valves the best possible solutions for outstanding performance. And with
an extensive network of Global Service Partners, we also provide
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comprehensive global service for all of our components.
• Steering
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Please contact the Sauer-Danfoss representative nearest you.

Members of the Sauer-Danfoss Group: Local address:

Comatrol
www.comatrol.com

Schwarzmüller-Inverter
www.schwarzmueller-inverter.com

Turolla
www.turollaocg.com Sauer-Danfoss (US) Company Sauer-Danfoss ApS
2800 East 13th Street DK-6430 Nordborg, Denmark
Ames, IA 50010, USA Phone: +45 7488 4444
Valmova
Phone: +1 515 239 6000 Fax: +45 7488 4400
www.valmova.com Fax: +1 515 239 6618

Hydro-Gear Sauer-Danfoss GmbH & Co. OHG Sauer-Danfoss-Daikin LTD.

www.hydro-gear.com Postfach 2460, D-24531 Neumünster Shin-Osaka TERASAKI 3rd Bldg. 6F
Krokamp 35, D-24539 Neumünster, Germany 1-5-28 Nishimiyahara, Yodogawa-ku
Phone: +49 4321 871 0 Osaka 532-0004, Japan
Sauer-Danfoss-Daikin Fax: +49 4321 871 122 Phone: +81 6 6395 6066
www.sauer-danfoss-daikin.com Fax: +81 6 6395 8585

L1104530 • Rev AB • Aug 2013

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