HYDRAULIC SCHEMATIC

HOW TO READ SYMBOLS IN A HYDRAULIC SCHEMATIC 
TABLE OF CONTENTS

Introduction ..................................................................................................... 35-3
Circuit Diagrams.............................................................................................. 35-3
Symbol Systems .............................................................................................. 35-3
Using Schematic Symbols ............................................................................... 35-3
Reservoirs ........................................................................................................ 35-3
Lines, Tubes and Hoses ................................................................................... 35-4
Crossing or Joining Lines ................................................................................ 35-5
Pump Symbols ................................................................................................. 35-5
Hydraulic Motor Symbols ................................................................................ 35-6
Cylinder Symbols ............................................................................................. 35-6
Pressure Control Symbols ................................................................................. 35-7
Normally Closed ............................................................................................... 35-7
Normally Open ................................................................................................. 35-7
Relief Valve ...................................................................................................... 35-7
Pressure Reducing Valve .................................................................................. 35-7
Sequence Valve ................................................................................................. 35-8
Directional Control Symbols ............................................................................ 35-8
Simplified Symbols .......................................................................................... 35-8
One Way Valve ................................................................................................. 35-8

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