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330 schematic diagram
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INTERACTIVE SCHEMATIC
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Cover PageInformation
SchematicMachine Views
Component TableTap Table
Fluid Power Symbols
Electrical Symbols
Front Frame
Rear Frame
Tap Views
Features
Options
Bookmarks X
EC-C3EC-C2 E-C60
EC-C1
E-C61
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Hydraulic System330C Excavator
©2003 Caterpillar, All Rights Reserved Printed in U.S.A.
RENR 7168June 2003
CAP1-UPCGZ1-UPJCD1-UPMKM1-UPJNK1-UP
COMPONENT LOCATION
Description PartNumber
MachineLocation
SchematicLocation
Accumulator Gp 087-4456 1 B-5
Cooler Gp - Oil 204-0971 2 A-6
Cylinder Gp - Boom 192-6894 3 E-3
Cylinder Gp - Bucket 115-8693 4 E-3
Cylinder Gp - Stick 192-6910 5 E-7
Drive Gp - Pump (View from Shaft End) 191-5612 6 A-3
Filter Gp - Drain 158-8987 7 A-4
Filter Gp - Pilot 158-8987 8 A-4
Filter Gp - Return 188-4140 9 A-5
Manifold Gp - Pilot Oil Control 215-5037 10 A-5
Motor Gp - Fan (Hydraulic Oil Cooler) 191-5611 11 A-6
Motor Gp - Left Travel 271-6376 12 E-5
Motor Gp - Right Travel 271-6376 13 E-4
Motor Gp - Swing 200-3373 14 E-6
Pump Gp - Gear (Fan Motor) 194-8384 15 B-3
Pump Gp - Idler (View from Shaft End) 099-2978 16 A-3
Pump Gp - Pilot 197-2309 17 A-3
Sensor As - Pressure (Drive Pump) 221-8859 18 A-2
Sensor As - Pressure (Idler Pump) 221-8859 19 A-2
Switch As - Pressure 1 175-3244 20 C-7
Switch As - Pressure 2 175-3244 21 C-7
Switch As - Pressure 3 175-3244 22 B-7
Swivel Gp 159-7841 23 D-4
Tank Gp - Hydraulic 192-6845 24 A-4
Valve Gp - Attachment Control 171-0146 25 C-4
Valve Gp - Boom Control I 264-9963 26 C-3
Valve Gp - Boom Control II 264-9963 27 C-6
Valve Gp - Boom Drift Reduction 158-8118 28 D-2
Valve Gp - Bypass Check 204-2804 29 A-6
Valve Gp - Left Travel 226-4095 30 C-5
Valve Gp - Left Travel Brake 204-2819 31 D-5
Valve Gp - Main Control 212-7960 32 C-4
Valve Gp - Main Relief 261-2445 33 C-4
Valve Gp - Pilot Control (Boom and Bucket) 206-3303 34 C-7
Valve Gp - Pilot Control (Swing and Stick) 206-3304 35 C-7
Valve Gp - Pilot Relief 215-4909 36 A-4
Valve Gp - Pilot Travel 158-8250 37 C-7
Valve Gp - Power Shift Proportional Reducing 114-0616 38 B-2
Valve Gp - Reducing (Boom/Swing Priority Mode) 232-4102 39 B-4
Valve Gp - Relief (Fan Pump) 206-3354 40 B-3
Valve Gp - Right Travel 226-4095 41 C-4
Valve Gp - Right Travel Brake 204-2819 42 D-4
Valve Gp - Slow Return Check 190-7745 43 A-6
Valve Gp - Solenoid (Fine Swing) 116-3526 44 D-6
Valve Gp - Solenoid (Hydraulic Activation) 121-1491 45 A-5
Valve Gp - Stick Control I 264-9962 46 C-5
Valve Gp - Stick Control II 264-9962 47 C-2
Valve Gp - Stick Drift Reduction 158-8161 48 D-5
Valve Gp - Swing Control 153-5295 49 C-5
Valve Gp - Swing Parking Brake Solenoid 121-1491 50 A-5
Valve Gp -Travel Speed Solenoid 121-1491 51 A-5
FLUID POWER SYMBOLS
ONE POSITION TWO POSITION THREE POSITION
VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL
LINES CROSSING LINES JOINING
TWO-WAY THREE-WAY FOUR-WAY
SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION(FIXED)
2-SECTION PUMP
MAIN AUX.
SPRING(ADJUSTABLE)
VARIABILITY LINE RESTRICTION(VARIABLE)
LINE RESTRICTIONVARIABLE and PRESSURE
COMPENSATED
PRESSURECOMPENSATION
PUMP: VARIABLE andPRESSURE COMPENSATED
ENERGY TRIANGLESHYDRAULIC PNEUMATIC
MEASUREMENT
PRESSURE TEMPERATURE FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FIXEDDISPLACEMENT
VARIABLE DISPLACEMENTNON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
HYDRAULIC PUMPS
FLUID STORAGE RESERVOIRS
CROSSING AND JOINING LINES
VALVE ENVELOPES VALVE PORTS
BASIC COMPONENT SYMBOLS
FLUID CONDITIONERPUMP or MOTOR
FIXEDDISPLACEMENT
VARIABLE DISPLACEMENTNON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILOT CONTROL SYMBOLSRELEASED PRESSURE
EXTERNAL RETURN INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSURE
ACCUMULATORS
SPRING LOADED GAS CHARGED
SOLENOIDor MANUAL
SOLENOIDand PILOT
SOLENOID and PILOT or MANUAL
COMBINATION CONTROLS
SOLENOID SERVO THERMAL DETENT
HYDRAULIC AND PNEUMATIC CYLINDERS
DOUBLE ACTINGSINGLE ACTING
BASICSYMBOL
SPRINGLOADED
CHECK VALVES
TWOPOSITION
INFINITEPOSITIONING
FLOW IN ONEDIRECTION
FLOW ALLOWED INEITHER DIRECTION
THREEPOSITION
CROSSFLOW
PARALLELFLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
A B
P T
A B
P TSHIFTED POSITION INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOTCONTROLLED
ELECTRICAL SYMBOLSHydraulic Symbols (Electrical)
325-AG135 PK-14
Circuit IdentificationNumber
Wire Color Wire Gauge
Harness identification codeThis example indicateswire 135 in harness "AG".
325-PK-14
Wire Gauge
Wire Color
Circuit Number Identification
Wire Number Identification Codes
Current Standard
Previous Standard
Electrical Schematic Example Hydraulic Schematic Example
325-PK
Wire ColorCircuit Number Identification
B A
Wire
Wire
(EXAMPLE VALVE)
Current Standard
Transducer(Fluid)
Transducer(Gas / Air)
G
Generator
Electrical WirePressure Switch
MElectric Motor
Pressure Switch (Adjustable)
Temperature Switch
PressureSymbol
TemperatureSymbol
LevelSymbol
FlowSymbol
Electrical Symbols (Electrical)
T
Components are shown installed on a fully operable machine with the key and engine off, transmission shifterin neutral and with parking brake set.Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
SCHEMATIC PART NUMBER: 215-4897, CHANGE: 07, VERSION: HEMEDIA NUMBER: RENR 7168THIS SCHEMATIC IS FOR THE 330C EXCAVATOR HYDRAULIC SYSTEM
A
B
C
D
E
1234567
A
B
C
D
E
1234567
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
CALLOUTS
Taps (Pressure, Sampling, Sensor - by letter)YY
(52) VALVE GP - CONTROL138-1234
Callout Number(Machine Location from
Component LocationsTable)
ComponentName
Part Number
IN
T
OUT
BDr
Pi2A3
M1
M2
J2
J1
R3
A2
A1
M3
X2
X1
R2
S
S4A4
T2
B A
T1
T2
T1
A B
X X
TOUTPIN
PACPi1P2P1 PSA2
DR6DR5
PSA1
DR4DR3DR2DR1D
C
BA
G
F E
BP1 BTT
P1P2
B2
A2 B1
B8B7B6C B5B4B3B2B1
A8A7A6A5A4A3A2A1
SDr
STSP1
SP2
Pi3 Di3 DST PRPL
AR4R1BR4
AR3BR3AR2BR2
SPi
SP3
AR1BR1
BR5Di4
Pi4
AL1
bL3
AR5AL4
BL1
CLO
SE
AL2
OP
EN
A1
R3BL2
BPi
AL3
DO
WN
R2
BP3
LR
R4
BP2
X3
bR4
aR5Pi1aR4
bR5HR
Di1
aR3
bR3
aR2
bR2
aR1
bR1
aL1
bL1HL
aL2
bL2bL4 Pi2
aL4
Di2
IN UP
R1
OU
T
M4
BL3aL3
4
B A
D
C
PR
(5) CYLINDER GP - STICK192-6910
(14) MOTOR GP - SWING200-3373
(12) MOTOR GPLEFT TRAVEL
271-6376
(31) VALVE GPLEFT TRAVEL
BRAKE204-2819
(44) VALVE GPSOLENOID (FINE SWING)116-3526
(23) SWIVEL GP159-7841
(13) MOTOR GPRIGHT TRAVEL271-6376
(42) VALVE GPRIGHT TRAVELBRAKE204-2819
(4) CYLINDER GP - BUCKET 115-8693
(3) CYLINDER GP - BOOM192-6894
(28) VALVE GPBOOM DRIFT REDUCTION158-8118
(32) VALVE GPMAIN CONTROL
212-7960
(48) VALVE GPSTICK DRIFTREDUCTION158-8161
(37) VALVE GPPILOT TRAVEL
158-8250
(20) SWITCH ASPRESSURE 1175-3244
(21) SWITCH ASPRESSURE 2175-3244
(34) VALVE GPPILOTCONTROL(BOOM ANDBUCKET)206-3303
(35) VALVE GPPILOT CONTROL(SWING AND STICK)206-3304
(22) SWITCH ASPRESSURE 3
175-3244
(27) VALVE GPBOOMCONTROL II264-9963
(46) VALVE GPSTICK
CONTROL I 264-9962
(49) VALVE GPSWING
CONTROL153-5295
(30) VALVE GPLEFT TRAVEL226-4095
(41) VALVE GPRIGHT TRAVEL
226-4095
(33) VALVE GPMAIN RELIEF261-2445
(25) VALVE GPATTACHMENTCONTROL171-0146
(26) VALVE GPBOOM
CONTROL I264-9963
(47) VALVE GPSTICK
CONTROL II264-9962
(15) PUMP GPGEAR(FAN MOTOR)194-8384
(38) VALVE GPPOWER SHIFTPROPORTIONAL REDUCING114-0616
(18) SENSOR ASPRESSURE (DRIVE PUMP)221-8859
(19) SENSOR ASPRESSURE (IDLER PUMP)221-8859
(17) PUMP GPPILOT
197-2309
(16) PUMP GPIDLER (VIEW FROM SHAFT END)099-2978
(6) DRIVE GPPUMP (VIEW FROM SHAFT END)191-5612
(40) VALVE GPRELIEF(FAN PUMP)206-3354
(39) VALVE GPREDUCING
(BOOM/SWING PRIORITY MODE)232-4102
(8) FILTER GPPILOT
158-8987
(36) VALVE GPPILOT RELIEF
215-4909
(7) FILTER GPDRAIN
158-8987
(24) TANK GPHYDRAULIC
192-6845
(1) ACCUMULATOR GP087-4456
(45) VALVE GPSOLENOID
(HYDRAULIC ACTIVATION)121-1491
(9) FILTER GPRETURN188-4140
(50) VALVE GPSWING PARKING BRAKE SOLENOID
121-1491
(51) VALVE GPTRAVEL SPEED SOLENOID
121-1491(10) MANIFOLD GP
PILOT OIL CONTROL215-5037
(43) VALVE GPSLOW RETURN CHECK
190-7745
(29) VALVE GPBYPASS CHECK
204-2804
(2) COOLER GPOIL
204-0971
(11) MOTOR GPFAN (HYDRAULIC OIL COOLER)
191-5611
MACHINE COMPONENT LOCATIONS
49
47
46
42
41
33
32
31
30
27
26
25
23
1716
14
1312
37
24
910 8 76
5
4
3
2
1
MAIN CONTROL VALVE
33
47
29
26 25 41 30 49 46 27
PILOT OIL MANIFOLD
51
45
50