SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (1, 1)
966F & 966F Series II WHydraulic System1SL1-UP3XJ1-UP4YG1-UP8BG1 UP
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (1, 2)
ONE POSITION TWO POSITION THREE POSITION
VENTED PRESSURIZED RETUR
SPRING CONTROL VAL
SPRING(ADJUSTABLE)
VARIABILITY LINE RESTRICTION(VARIABLE)
PRESSURCOMPENSA
MEASUREMENT
PRESSURE TEMPERATURE FLOW
MANUAL C
FLUID STO
VALVE ENVELOPES
BASIC COM
FLUID CONDITIONERPUMP or MOTOR
FLUID PO
SOLENOIDor MANUAL
SOLENOIDand PILOT
COMBINA
SOLENOID
NORMAL POSITION
A B
P T
A B
P TSHIFTED POSITION INFINITE POSITIO
CONTROL VALVES
SENR4778-02October 1993
I Wheel Loaders
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (1, 3)
POSITION
RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL
TWO-WAY THREE-WAY FOUR-WAY
CONTROL VALVES RESTRICTION LINE RESTRICTION(FIXED)
2-SECTION PUMP
MAIN AUX.
LINE RESTRICTIONVARIABLE and PRESSURE
COMPENSATED
PRESSURECOMPENSATION
PUMP: VARIABLE andPRESSURE COMPENSATED
ENERGY TRIANGLESHYDRAULIC PNEUMATIC
FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
ANUAL CONTROL SYMBOLS
LUID STORAGE RESERVOIRS
VALVE PORTS
ASIC COMPONENT SYMBOLS
UID POWER SYMBOLS
VALVES
DT
SOLENOID and PILOT or MANUAL
COMBINATION CONTROLS
SERVO THERMAL DETENT
BASICSYMBOL
SPRINGLOADED
CHECK VALVES
NITE POSITION
ATTACHMENT
SHUTTLE PILOTCONTROLLED
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (1, 4)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (2, 1)
3XJ1-UP4YG1-UP8BG1-UP9YJ1-UP
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (2, 2)
LINES CROSSING
PUSH-PULL LEVER G
MANUAL C
HYDRA
FIXEDDISPLACEMENT
VARIABLE DISPLACEMENTNON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
HYDRAULIC PUMPS
CROSSING
FIXEDDISPLACEMENT
UNID
BID
PILOT CORELEASED PRESSURE
EXTERNAL RETURN INTERNAL RETURN
ACCUMULATORS
SPRING LOADED GAS CHARGED
or MANUAL and PILOT
MANUAL SHUTOFF
© 1993 CaterpillarAll Rights Reserved
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (2, 3)
78-0
2
CROSSING LINES JOINING
PEDALGENERAL MANUAL PUSH BUTTON SPRING
ANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
ROSSING AND JOINING LINES
XEDACEMENT
VARIABLE DISPLACEMENTNON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
PILOT CONTROL SYMBOLSREMOTE SUPPLY PRESSURE
SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSURE
T PILOT or MANUAL
HYDRAULIC AND PNEUMATIC CYLINDERS
DOUBLE ACTINGSINGLE ACTING
TWOPOSITION
INFINITEPOSITIONING
FLOW IN ONEDIRECTION
FLOW ALLOWED INEITHER DIRECTION
THREEPOSITION
CROSSFLOW
PARALLELFLOW
INTERNAL PASSAGEWAYS
Printed in U.S.A.
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (2, 4)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (3, 1)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (3, 2)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (3, 3)
SE
NR
4778
12 P
ag
e
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 1 (3, 4)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (1, 1)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (1, 2)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (1, 3)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (1, 4)
778-
02g
e
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (2, 1)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (2, 2)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (2, 3)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (2, 4)
SE
NR
4778
-12
Pag
e
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (3, 1)
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (3, 2)
THIS SCHEMATIC ISComponents are shown instshifter in neutral.
Refer to the appropriate Ser
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (3, 3)
EMATIC IS FOR THE 966F AND 966F SERIES II WHEEL LOADERSre shown installed on a fully operable machine with the key and engine off and transmission l.
propriate Service Manual for Troubleshooting, Specifications and Systems Operations
SENR4778-02_SIS.pdf 7/17/2006 11:24:27 AM Page 2 (3, 4)
Top Related