Table Of Contents - Danfoss PVG 100 Service Manual

Proportional valves

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Technical information (76 pages)

Service and parts manual (44 pages)

Installation manual (12 pages)

Table Of Contents

Table of Contents

Service Manual

Contents

Introduction

Operation

System Troubleshooting

PVG 100 Component Troubleshooting

PVG 100 Proportional Valves

Overview..............................................................................................................................................................................................5

General Instructions........................................................................................................................................................................ 5

Remove the unit.......................................................................................................................................................................... 5

Keep it clean..................................................................................................................................................................................5

Replace all O-rings and gaskets............................................................................................................................................. 5

Secure the unit............................................................................................................................................................................. 5

Safety Precautions............................................................................................................................................................................6

Unintended machine movement..........................................................................................................................................6

Flammable cleaning solvents................................................................................................................................................. 6

Fluid under pressure.................................................................................................................................................................. 6

Personal safety............................................................................................................................................................................. 6

Hazardous material.................................................................................................................................................................... 6

Acronyms ............................................................................................................................................................................................7

PVG 100 Group with Open Center PVPF.................................................................................................................................. 8

PVG 100 Group with Closed Center PVPV............................................................................................................................... 8

PVG 100 Sectional Drawing.......................................................................................................................................................... 9

PVPC Plug for External Pilot Oil Supply..................................................................................................................................10

PVPC with Check Valve for Open Center PVP.................................................................................................................10

PVPC without Check Valve for Open Center PVP..........................................................................................................10

Friction detent.................................................................................................................................................................................11

PVMR Friction Detent..............................................................................................................................................................11

PVMF Mechanical Float Position Lock...............................................................................................................................11

PVBS, Main Spools for Flow Control (standard) ................................................................................................................. 12

PVBS, Main Spools for Flow Control (with linear characteristics) ................................................................................ 12

PVPP Electrical Pilot Shut-Off Valve.........................................................................................................................................12

PVPE Electrical Full Flow Unloading Valve............................................................................................................................13

Overview........................................................................................................................................................................................... 14

Troubleshooting a PVG Valve.................................................................................................................................................... 14

No Cylinder/Motor Response in Either Direction when Remote Controller is Actuated..................................... 16

Cylinder/Motor Responds in One Direction Only...............................................................................................................16

Main Valve Spool Moves without Oil Passing to Cylinder/Motor.................................................................................17

Cylinder/Motor Operates without Remote Controller being Operated.................................................................... 17

Cylinder/Motor Responds Slowly to Remote Electrical or Hydraulic Controller.....................................................18

Erratic Cylinder/Motor Response to Electrical or Hydraulic Controller Operation.................................................18

Hydraulic Oil Supply......................................................................................................................................................................18

Electrical Supply............................................................................................................................................................................. 19

Hydraulic (remote) Pilot Control Pressure............................................................................................................................ 20

Open Center Pressure Relief Valve...........................................................................................................................................21

Closed Center Pressure Relief Valve........................................................................................................................................ 21

Pressure Reducing Pilot Valve................................................................................................................................................... 21

Pressure Gauge Connection.......................................................................................................................................................23

Pressure Matching Spool.............................................................................................................................................................24

LS Connection................................................................................................................................................................................. 24

LS Signal............................................................................................................................................................................................ 25

Shuttle Valve....................................................................................................................................................................................26

Main Spool........................................................................................................................................................................................27

Shock and Anti-Cavitation Valve PVLP...................................................................................................................................29

Pressure Compensator.................................................................................................................................................................30

Maximum Oil Flow Adjustment Screws for Ports A and B...............................................................................................31

PVM Module.....................................................................................................................................................................................32

PVT/PVTI Module............................................................................................................................................................................33

PVAS Module................................................................................................................................................................................... 34

PVPP Pilot Shut Off Valve............................................................................................................................................................ 35

PVPE Unloading Valve ................................................................................................................................................................. 35

11048807 • Rev BA • October 2014