Danfoss PVE 7 Series User manual

Service Manual

Electrohydraulic Actuators

PVE Series 7

powersolutions.danfoss.com

Revision history Table of revisions

Date Changed Rev

August 2017 First edition 0101

Service Manual

PVE Series 7

2 | ©Danfoss | August 2017 AX00000348en-US | 0101

Abbreviations Chart List of abbreviations for PVG/PVE...............................................................................................................................................4

Danfoss Literature Reference.......................................................................................................................................................5

Warnings PVE warnings......................................................................................................................................................................................6

General Information Introduction........................................................................................................................................................................................7

General instructions........................................................................................................................................................................ 8

Safety precautions............................................................................................................................................................................8

PVG with the PVE overview...........................................................................................................................................................9

Troubleshooting............................................................................................................................................................................... 9

Connector Overview.....................................................................................................................................................................10

Hydraulic Principle Variants....................................................................................................................................................... 12

Exchanging PVE Before replacing or dismounting a PVE.................................................................................................................................14

Dismounting of PVE......................................................................................................................................................................14

Mounting of Replacement..........................................................................................................................................................15

Test and use of PVG and Actuator........................................................................................................................................... 15

Returning Replaced Actuator for Customer Claims.......................................................................................................... 15

Service Manual

PVE Series 7

Contents

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List of abbreviations for PVG/PVE

Abbreviation Description

ASIC Application Specific Integrated Circuit - the part of the PVE where spool position is controled to

follow setpoint

ATEX Certificated for use in explosive environment

AVC Auxillery Valve Comand - ISOBUS/J1939 standard signal for valve control

AVCTO Auxillery Valve Comand Time Out - Fault monitoring setting

AVEF Auxillery Valve Estimated Flow - ISOBUS/J1939 standard signal for valve feedback

CAN Controller Area Network - Communication method used by PVED

CLC Closed Loop Circuit

CRC Cyclic Redundancy Check - Method for ensuring validity of data.

-DI PVE with Direction Indication

DM1 Diagnostic Message 1 - J1939 message informing about present fault

DM2 Diagnostic Message 2 - J1939 message informing about fault history

DM3 Diagnostic Message 3 - J1939 message clearing fault history

DSM Device State Machine. Deterministic description of system process

ECU Electronic Control Unit

EH Electrohydraulic

-F PVE for Float spool. Two variants: 4 pin with float at 75%. 6 pin with separate float.

FMEA Failure Mode Effect Analysis

ISOBUS Communication standard for CAN

J1939 Communication standard for CAN

LED Light Emitting Diode

LS Load Sensing

LVDT Linear Variable Differential Transducer - Position sensor

NC Normally Closed solenoid valve in PVE

NC-H Normally Closed standard solenoid valve in PVEH

NC-S Normally Closed solenoid valve Super in PVES

NO Normally Open solenoid valve in PVE

PLC Programmable Logical Circuit

PLUS+1®Trademark for Danfoss controllers and programming tool

POST Power On Self Test. Boot up evaluation for PVED

Pp Pilot Pressure. The oil gallery for PVE actuation

PVB Proportional Valve Basic module - valve slice

PVBS Proportional Valve Basic module Spool

PVBZ Proportional Valve Basic module Zero leakage

PVE Proportional Valve Electric actuator

PVEA PVE variant with 2-6 % hysteresis

PVED PVE variant Digital controlled via CAN communication

PVEH PVE variant with 4-9% Hysteresis

PVEM PVE variant with 25-35% hysteresis

PVEO PVE variant with ON/OFF actuation

PVEP PVE variant PWM controled

PVES PVE variant with 0-2% hysteresis

PVEU PVE variant with US 0-10V

PVG Proportional multi-section Valve Group

PVHC PV variant with High Current controlled valve actuator

Service Manual

PVE Series 7

Abbreviations Chart

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Abbreviation Description

PVM Proportional Valve Manual control with handle

PVP Proportional Valve Pump side module.Inlet

PVS Proportional Valve end plate

PVSK Proportional Valve end plate crane. Inlet module with Spool Control

PWM Pulse Width Modulation

S4 DJ Series 4 Digital J1939 service tool software for PVED-CC

SAE Society Automotive Engineering

-R PVE with Ramp function

-NP PVE with solenoid disable in Neutral Position

-SP PVE with Spool Position feedback

uC Microcontroller

uCSM Microcontroller State Machine

UDC Power supply Direct Current; also called Vbat for battery voltage

USSteering voltage for the PVE control; also called VS

Danfoss Literature Reference

Danfoss literature reference for PVG and PVE products

Title Type Order number

PVG 32 Proportional Valve Groups Service Manual 11039167

PVG 100 Proportional Valve Groups Service Manual 11048807

PVG 32 Proportional Valve Groups Technical Information 520L0344

PVG 100 Proportional Valve Groups Technical Information 520L0720

PVG 120 Proportional Valve Groups Technical Information 520L0356

PVE Series 7 Technical information BC00000XXXen-US0101

PVG 32 Metric ports Technical Information 11051935

Service Manual

PVE Series 7

Abbreviations Chart

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PVE warnings

Warning

Not applying to the Operational Conditions can compromise safety.

All brands and all types of directional control valves – including 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 machine

builder/ system integrator alone is responsible for making the final selection of the products – and

assuring that all performance, safety and Warning requirements of the application are met.

A PVG with PVE can only perform according to description if conditions in this Technical Information are

met.

In particularly exposed applications, protection in the form of a shield is recommended.

When the PVE is in fault mode the quality of performance and validity of feedback is limited depending

on the fault type.

Error pins from more PVEs may not be connected. Inactive error pins are connected to ground and will

disable any active signal. Error pins are signal pins and can only supply very limited power consumption.

Deviation from recommended torque when mounting parts can harm performance and module.

Adjustment of the position transducer (LVDT) will influence calibration, and thereby also safety and

performance.

When replacing the PVE, the electrical and the hydraulic systems must be turned off and the oil pressure

released.

PVEA is not for use on PVG 100.

Hydraulic oil can cause both environmental damage and personal injury.

Module replacement can introduce contamination and errors to the system. It is important to keep the

work area clean and components should be handled with care.

After replacement of modules or cables wiring quality must be verified by a performance test.

By actuation at voltage below nominal PVG will have reduced performance.

The PVE is not designed for use with voltage outside nominal.

Obstacles for the Pilot oil can have direct influence on spool control.

Reduced pilot oil pressure will limit spool control.

Too high pilot oil pressure can harm the PVE.

Service Manual

PVE Series 7

Warnings

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Introduction

This manual includes information for trouble shooting and servicing the PVE actuators. The actuators are

used on PVG 32, PVG 100, PVG120 and some EH steerings. This manual does not cover the PVG in general

nor any steering.

PVE actuators

The PVE for PVG 32 and PVG 100 are the same, for PVG 120 includes a special interface plate, has another

LVDT-pin and allows larger spool travel. Service on the actuators is identical independent of valve size.

In general service on PVE is limited to exchange of O-rings and connectors or whole actuator.

Performing service, trouble shooting and repair may require removal of valve and valve parts from the

application. This can easily introduce misplaced parts and contamination and thereby thread

performance and safety. Following cleanliness requirements is a prerequisite for service.

For general description, specifications and operating parameters on PVG valves and actuators please see

the relevant Technical Information listed in reference list. Danfoss technical literature is available on

www.danfoss.com.

A worldwide network of Danfoss Global Service Partners is available for major repairs. Danfoss trains and

certifies Global Service Partners on a regular basis. You can locate your nearest Global Service Partner

using the distributor locator at www.danfoss.com.

Warning

Do not attempt to service PVG valves without build sheet specifications for reference.

Service Manual

PVE Series 7

General Information

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General instructions

Follow these general procedures when servicing PVG 32 valves:

Avoid injuries or material damage

Plan the process thoroughly. Block wheels and other moving parts to prevent undesired movement.

Secure against leakage of hydraulic fluid. Hydraulic fluid can cause contamination, cause burns due to

temperature and other injuries due to high pressure. Follow all instructions from machine builder.

Keep it clean

Cleanliness is the primary mean of assuring long lifetime for the application. Clean the outside of the

valve thoroughly before any disassembly. Cap ports and hoses when opening. Avoid contamination by

both dirt and chemical agents. Clean parts using a clean solvent wash and air dry.

Replace all O-rings and gaskets

Danfoss recommends inspection of O-rings and gaskets and replacement if wear or contamination

could be relevant. Dried out O-rings and gaskets must be replaced.

Safety precautions

Always consider safety precautions before beginning a service procedure. Protect yourself and others

from injury. Follow instructions from machine manufacture carefully. Read and include the warnings from

the relevant PVG literature in your work planing.

Warning

Ensure stable conditions

Manipulation on a mechanical, hydraulic and electrical system can potentially create dangerous

situations. Please ensure that all necessary precautions are taken to prevent dangerous situations.

Warning

Release hydraulic pressure in system

Shut down pump and release pressure in all work functions, in tank and pilot pressure if not released by

previous operations

Warning

Disengage electrical system

Disengage power supply and system control. If relevant for application, disengage system output e.g.

error pin, direction indicator.

Service Manual

PVE Series 7

General Information

8 | ©Danfoss | August 2017 AX00000348en-US | 0101

PVG with the PVE overview

The PVG is a sectional spool valve stack with up to 12 individually controlled proportional valves. The PVG

with the PVE can be operated as single valves or several valves in cooperation. The oil flow out of the

work section (A- or B-port) can be controlled by a combination of the following:

•PVE controlling the spool position using pilot oil pressure.

•A handle (PVM) in mechanical interface with the spool.

The analog PVE Series 7 is an electro-hydraulic actuator used to control a single work section of a PVG

proportional valve group. The PVE Series 7 actuator program includes variants with different

performance levels and features for PVG 32/100/120/128/256.

The actuator positions the main spool in a PVG work section in order to control either the flow or the

pressure of the oil distributed to/from the work function. The control signal to the actuator is an analog

voltage signal, enabling the user to operate the work function remotely by means of a joystick, a

controller or the like.

The electro-hydraulic solenoid valve bridge of the actuator is available in different designs, utilizing

different regulation principles, depending on performance variant. The actuator positions the main spool

by distributing pilot oil pressure to either side of it, pressurizing one side by pilot pressure while relieving

the opposite side to tank and vice versa. All proportional actuators feature a closed-loop spool control

and continuous fault monitoring.

The analog PVE Series 7 actuator program features five different main hydraulic principle variants

(PVEO/M/A/H/S). The different hydraulic principles combined with the different solenoid valve regulation

principles determine whether the actuator controls the spool proportionally according to a demand

signal or ON/OFF according to a voltage signal.

Valve section - standard mounted - seen from PVP with naming

Troubleshooting

The Service Manuals for PVG 32 and PVG 100 have a thorough description of system troubleshooting and

parts troubleshooting. Please look for descriptions there before starting with the actuator. The actuator is

an electrohydraulic subsystem used for moving the spool and thereby opens the valve for work flow.

Service Manual

PVE Series 7

General Information

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