966F & 966F Series II Wheel Loaders Hydraulic System

FLUID POWER SYMBOLS

SENR4778-02 October 1993

BASIC COMPONENT SYMBOLS

PUMPorMOTOR

SPRING (ADJUSTABLE)

VARIABILITY

 

SPRING

FLUIDCONDITIONER

CONTROLVALVES

 

PRESSURE COMPENSATION

LINERESTRICTION (VARIABLE)

MAIN AUX. PUMP: V ARIABLEan d 2-SECTIONPUMP PRESSURECOMPEN SATED

LINERESTRICTION (FIXED)

RESTRICTION

HYDRAULIC PNEUMATIC ENERGYTRIAN GLES

 ATTACHMENT

LINERESTRICTION VARIABLEandPRESSURE COMPENSATED

VALVES VALVE ENVELOPES

TWO POSITION

ONEPOSITION

VALVE PORTS

 

THREEPOSITION

TWO-WAY

 

 

THREE-WAY

CONTROL VALVES  A B

FOUR-WAY

CHECK VALVES

 A B

PT SHIFTEDPOSITION T ION

PT NORMALPOSITION

BASIC SYMBOL

INFINITEPOSITION T ION

PRESSURE

 

TEMPERATURE

S HU TT LE

SPRING LOADED

MEASUREMENT

P IL OT CONTROLLED

ROTATING SHAFTS

 

FLOW

U NI DI RECT O I N AL

BI DI REC TI ONAL

FLUID STORAGE RESERVOIRS

966F & 966F Series II Wheel Loaders Hydraulic System

V EN TE D

 

P RE SS UR IZ ED

RETURNABOVEFLUIDLEVEL

 

RETURNBELOWFLUID LEVEL

COMBINATION CONTROLS

1SL1-UP 3XJ1-UP

SOLENOID

SOLENOID or MANUAL

SOLENOIDand PILOTor MANUAL

SOLENOID and PILOT

4YG1-UP

S ERV O

TH ER MA L

D ET EN T

MANUAL CONTROL SYMBOLS

8BG1-UP 9YJ1-UP

PUSH-PULL LEVER

MANUALSHUTOFF

GENERAL MANUAL

P USH BUTTON

PEDAL

SPRING

PILOT CONTROL SYMBOLS

RELEASED PRESSURE

EXTERNALRETURN

 

INTERNALRETURN

 ACCUMULATORS

SPRINGLOADED

 

GASCHARGED

HYDRAULIC PUMPS FIXED DISPLACEMENT

REMOTE SUPPLYPRESSUR E

VARIABLEDISPLACEMENT NON-COMPENSATED

SIMPLIFIED

CROSSING AND JOINING LINES

LINESCROSSING

 

LINESJOINING

FIXED DISPLACEMENT

VARIABLEDISPLACEMENT NON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

BIDIRECTIONAL

 

COMPLETE

SINGLEACTING

INTERNAL SUPPLYPRESSURE

DOUBLEACTING

INTERNAL PASSAGEWAYS

HYDRAULIC MOTORS

UNIDIRECTIONAL

© 1993 Caterpillar   All Rights Reserved

 

HYDRAULIC AND PNEUMATIC CYLINDERS

INFINITE POSITIONING

FLOWINONE DIRECTION

TWO POSITION

THREE POSITION

PARALLEL FLOW

CROSS FLOW

FLOWALLOWEDIN EITHERDIRECTION

Printed in U.S.A.

   2    0     8    7  e    7  g   a    4   P    2    1    R    N    E    S

   2    0     8    7  e    7  g   a    P    4    2    1    R    N    E    S

THIS SCHEMATIC IS FOR THE 966F AND 966F SERIES II WHEEL LOADERS Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations