Description ACCUMULATOR - HYDRAULIC (PILOT OIL)
Part Number
Machine Location
Schematic Location
164-6981
1
B-6
CYLINDER GP - BOOM
NOTE A
2
G-3
CYLINDER GP - BUCKET
NOTE A
3
G-10
CYLINDER GP - STICK
NOTE A
4
G-9
126-2075
5
A-6
FILTER GP - OIL (HYDRAULIC RETURN)
188-4140
6
A-9
FILTER GP - OIL (PILOT)
158-8987
7
A-5
MANIFOLD GP - CONTROL (PILOT OIL)
215-5037
8
B-8
MOTOR GP - PISTON
234-4638
9
A-10
FILTER GP - OIL (CASE DRAIN)
MOTOR GP - SWING
200-3373
10
G-8
MOTOR GP - TRAVEL
271-6376
11
G-5, G-7
PUMP GP - PISTON (HYDRAULIC FAN)
259-0815
12
B-4
PUMP GP - PISTON (MAIN)
283-6116
13
B-3
SWIVEL GP
234-4440
14
F-6
VALVE GP - CHECK (OIL COOLER BYPASS)
190-7745
15
B-10
VALVE GP - LOAD CONTROL (BOOM DRIFT RED, RELIEF LINE)
255-5683
16
E-3
VALVE GP - LOAD CONTROL (STICK DRIFT RED, RELIEF LINE)
255-5680
17
E-7
VALVE GP - MAIN CONTROL
285-1540
18
D-2
VALVE GP - PILOT CONTROL (LEFT JOYSTICK)
270-5951
19
D-10
VALVE GP - PILOT CONTROL (RIGHT JOYSTICK)
270-5952
20
D-9
VALVE GP - PILOT (TRAVEL)
270-5947
21
E-10
VALVE GP - PRESSURE REDUCING (BOOM, SWING PRIORITY)
232-4102
22
B-6
VALVE GP - SHUTTLE
185-0462 259-7732
23 24
C-10 B-6
VALVE GP - SOLENOID (HEAVY LIFT)
121-6303
25
B-6
VALVE GP - SWING CUSHION (FINE SWING)
158-9090
26
F-8
VALVE GP - TRAVEL COUNTERBALANCE
204-2819
27
F-5, F-7
MAIN AUX.
23
AA
19
20
21
TWO POSITION
17 18
2
Drive Pump Pressure Test Port
B-2
Power Shift Pressure Test Port
A-2
DD SOS
Idler Pump Pressure Test Port Hydraulic Oil Sampling Port
A-2 A-5
SHUTTLE
SPRING LOADED
BASIC SYMBOL
PILOT CONTROLLED
ROTATING SHAFTS
FLOW
TEMPERATURE
UNIDIRECTIONAL
BIDIRECTIONAL
FLUID STORAGE RESERVOIRS
330D Excavator Hydraulic System
14
9
VENTED
RETURN ABOVE FLUID LEVEL
PRESSURIZED
RETURN BELOW FLUID LEVEL
COMBINATION CONTROLS
B6H1-UP JLP1-UP HAS1-UP EDX1-UP T2Y1-UP
11 27
SOLENOID
SOLENOID or MANUAL
SERVO
SOLENOID and PILOT or MANUAL
SOLENOID and PILOT
DETENT
THERMAL
MANUAL CONTROL SYMBOLS
PUSH-PULL LEVER
GENERAL MANUAL
MANUAL SHUTOFF
PUSH BUTTON
PEDAL
SPRING
PILOT CONTROL SYMBOLS RELEASED PRESSURE
16 22
INTERNAL RETURN
SPRING LOADED
25 11 27 13
REMOTE SUPPLY PRESSURE
5
7
SIMPLIFIED
CROSSING AND JOINING LINES
ACCUMULATORS
A-6
BB
INFINITE POSITION
3
6
15
Schematic Location
CC
CHECK VALVES
P T SHIFTED POSITION
PRESSURE
1
FOUR-WAY
THREE-WAY
AB
EXTERNAL RETURN
Pilot Filter Pressure Test Port
TWO-WAY
THREE POSITION
MEASUREMENT
24
ATTACHMENT
LINE RESTRICTION VARIABLE and PRESSURE COMPENSATED
VALVE PORTS
CONTROL VALVES AB
P T NORMAL POSITION
8
PUMP: VARIABLE and PRESSURE COMPENSATED
2-SECTION PUMP
HYDRAULIC PNEUMATIC ENERGY TRIANGLES
VALVES
VALVE ENVELOPES
ONE POSITION
LINE RESTRICTION (FIXED)
RESTRICTION
PRESSURE COMPENSATION
LINE RESTRICTION (VARIABLE)
SPRING (ADJUSTABLE)
4
CONTROL VALVES
SPRING
FLUID CONDITIONER
VARIABILITY
Tap Locations Pressure, Sampling, and Sensor Description
BASIC COMPONENT SYMBOLS
PUMP or MOTOR
Note A: Refer to Parts Manual for your specific machine.
Tap Number
FLUID POWER SYMBOLS
RENR9980 May 2006
COMPONENT LOCATIONS
GAS CHARGED
LINES CROSSING
HYDRAULIC PUMPS
10 26
FIXED DISPLACEMENT
12
HYDRAULIC AND PNEUMATIC CYLINDERS
SINGLE ACTING
LINES JOINING
FIXED DISPLACEMENT
VARIABLE DISPLACEMENT NON-COMPENSATED
UNIDIRECTIONAL
UNIDIRECTIONAL
BIDIRECTIONAL
BIDIRECTIONAL
DOUBLE ACTING
INTERNAL PASSAGEWAYS
HYDRAULIC MOTORS
VARIABLE DISPLACEMENT NON-COMPENSATED
INTERNAL SUPPLY PRESSURE
COMPLETE
TWO POSITION
THREE POSITION
INFINITE POSITIONING
PARALLEL FLOW
FLOW IN ONE DIRECTION
CROSS FLOW
FLOW ALLOWED IN EITHER DIRECTION
Heavy Lift and Fine Swing
MACHINE COMPONENT LOCATIONS
Printed in U.S.A.
© 2006 Caterpillar All Rights Reserved
Electrical Symbols Table Hydraulic Symbols (Electrical)
BB
B
A
SOS
AA
10
14
M
G Transducer (Fluid)
Transducer (Gas / Air)
Generator
Electric Motor
26
16
17
Electrical Symbols (Electrical)
VALVE GP - MAIN CONTROL
MOTOR GP - SWING & SWIVEL
T
Pressure Symbol
Temperature Symbol
Flow Symbol
Level Symbol
Wire Number Identification Codes
27 C
9
D
5
6
Electrical Schematic Example
Current Standard
Current Standard Harness identification code This example indicates wire 135 in harness "AG".
CC
Hydraulic Schematic Example
Wire
Circuit Number Identification
Wire Color
325-AG135 PK-14 325-PK Circuit Identification Number
Pump Compartment (A) Delivery line (Drive Pump) (B) Delivery line (IdlerPump) (C) Drive Pump (D) Idler Pump
Wire Color
Wire Gauge
Previous Standard
11
Wire Color
Wire
7
325-PK-14 B
PUMP GP - PISTON (MAIN)
MOTOR GP - PISTON (TRAVEL)
FILTER GP
Circuit Number Identification
A
Wire Gauge (EXAMPLE VALVE)
16 Page
18
Electrical Wire
Temperature Switch
RENR9980
Pressure Switch (Adjustable)
Pressure Switch
10
9
8
7
6
SWING MOTOR
TRAVEL MOTOR (LEFT)
DR
BUCKET CYLINDER
STICK CYLINDER
4
3
2
LINES GROUP COLOR DESCRIPTIONS IMPLEMENT & LEFT TRAVEL PUMP OUTPUT PILOT PUMP OUTPUT IMPLEMENT & RIGHT TRAVEL PUMP OUTPUT
R.C.V-C
MU AG
Pp3
FAN PUMP OUTPUT POWER SHIFT CONTROL CIRCUIT TRAVEL SPEED CONTROL CIRCUIT
BOOM CYLINDER
MOTOR GP TRAVEL 271-6376
MOTOR GP TRAVEL 271-6376
BG A1
ATTACHMENT CONTROL CIRCUIT RIGHT TRAVEL CONTROL & RIGHT TRAVEL MOTOR CIRCUIT LEFT TRAVEL CONTROL & LEFT TRAVEL MOTOR CIRCUIT SWING CONTROL & SWING MOTOR CIRCUIT
Pp3
AL3 AR3
T1
T1
T2
T2
BG
BG
HEAVY LIFT CONTROL CIRCUIT BOOM CONTROL & BOOM CYLINDER CIRCUIT BUCKET CONTROL & BUCKET CYLINDER CIRCUIT STICK CONTROL & STICK CYLINDER CIRCUIT SHUTTLE VALVE CONTROL CIRCUIT
BL3
BR3
VALVE GP SWING CUSHION (FINE SWING) 158-9090
AG
G
SUPPLY LINE DRAIN / RETURN LINE
DR B1
1
TRAVEL MOTOR (RIGHT)
MOTOR GP SWING 200-3373
PG
G
5
AR4
AG
BR4
LINE PATTERNS
F
A B VALVE GP PILOT (TRAVEL) 270-5947
BL2
TP
B
B
A VALVE GP TRAVEL COUNTERBALANCE 204-2819
AL2
BL1
AL1
Drain / Return Lines Component Group Attachment
AR1
BR1
Air Line
SWIVEL GP 234-4440
TT
TRAVEL(L)
CALLOUTS
TRAVEL(R)
YY
Taps (Pressure, Sampling, Sensor) by letter
1
Components by number
AA
Connections by letter
E
E FWD T6
bR1
VALVE GP LOAD CONTROL (STICK DRIFT RED, RELIEF LINE) 255-5680
aR1 PRESSURE SWITCH
SP3
SPi
AL3
BR4 BP3
SP2
SDr
AL2
R.C.V-A
OPEN JR4
A1
CLOSE JR2
DOWN JR3
A5
A6
A7
aR2 (BACK)
Pi1 (CLOSE)
MAIN RELIEF
(FWD) DST
Di3
aR4
bR3
B5
B4
B3
bR4
B6
bL3
B7
bL2
BP1 BT
BOOM DRIFT REDUCTION
BR4
(DOWN)
Pi5
(OPEN)
(UP)
aR5 R3
R1 BR5
VALVE GP MAIN CONTROL 285-1540
AR5 (IN)
D
(OUT)
bR2
Di1
C
bR5
bL4
aL2 P-IN
PSA2
TRAVEL SPEED
SWING PRIORITY
Pi1
DR1
A1
PSA1
VALVE GP CHECK (OIL COOLER BYPASS) 190-7745
BYPASS
E
D
F
DR1 DR
L3
bR4
HR
P1
L2
DR4
Pi2
DR5
T-OUT1
DR6
L1
VALVE GP SOLENOID (HEAVY LIFT) 121-6303
ACCUMULATOR GP 164-6981
T
D0
Ps1
a4
B
Psv
PUMP
a3
I LEFT
a5
D1 Ps2
3,/27
PG B
DRAIN
AA
PC
SOS
DD
a2
PL HYDRAULIC OIL SAMPLING
CC
POWER SHIFT PRESSURE TEST PORT
IDLER PUMP PRESSURE TEST PORT
PRESSURE SENSOR
RETURN
PILOT FILTER PRESSURE
PROPORTIONAL REDUCING VALVE
M2
PUMP
Dr1
DRIVE PUMP PRESSURE TEST PORT
RIGHT
S
T A
BB
M1
A4 S1
IN
OUT
B a1
FILTER GP OIL (PILOT) 158-8987
P
R.C.V.: RETURN CHECK VALVE
L
D
FILTER GP OIL (CASE DRAIN) 126-2075
MANIFOLD GP CONTROL (PILOT OIL) 215-5037
PR PRESSURE SENSOR
P2
PAC DR3
PUMP GP PISTON (MAIN) 283-6116
HR
PUMP GP PISTON (HYDRAULIC FAN) 259-0815
VALVE GP PRESSURE REDUCING (BOOM, SWING PRIORITY) 232-4102
A
FILTER GP OIL (HYDRAULIC RETURN 188-4140
MOTOR GP PISTON 234-4638
bR3
PR
VALVE GP SHUTTLE 259-7732
A2
T
P1
OIL COOLER
B2
T-OUT2 DR2
G SLOW RETURN
PL
Pi1
C
A
bL1
B8
PRESSURE SWITCH
R.C.V-B
bL2
bL3
NO.2 (SWING)
B2
B
A
Pi3
bL4
HL
R.C.V-C
R.C.V-A
Pi2
Di2
A8
P2
B
(R)
UP JR1
NO.1 (TRAVEL)
16 Page, Color 2
A4
(OUT)
AR3
BR3 BR2 AR2
bR1
B1
aR3
A3
(BACK)
$&7,9$7,21 +<'5$8/,&
RENR9980
A2
(L)
Pi4
R.C.V-B
BOOM
C VALVE GP SHUTTLE 185-0462
(IN)
TRAVEL(L)
L JL4
R JL2
IN JL3
Di4
NO.3 (LOCK)
JL1
BUCKET
BL3 R2
BOOM(2)
OUT
SWING
aL3
BR1
BP2
JRT
JRP
STICK
SP1 ST
SWING
JLT
STICK DRIFT REDUCTION
(UP)
VALVE GP PILOT CONTROL (RIGHT JOYSTICK) 270-5952
JLP
aL4
aR1
BL1
BDr
aR4
aR3
AR1
STICK(1)
VALVE GP PILOT CONTROL (LEFT JOYSTICK) 270-5951
AL4
AR4
AL1
BL2 T
aL1
aL2
BPi
STICK(2)
PRESSURE SWITCH
BL3
BOOM(1)
bL1
VALVE GP LOAD CONTROL (BOOM DRIFT RED, RELIEF LINE) 255-5683
T3
BUCKET
T4
T2
aL1
BACK
ATCH
T5
T1
TRAVEL(R)
FWD
BACK
D
F
Pilot / Load Sensing Pressure
VALVE GP TRAVEL COUNTERBALANCE 204-2819
A
Pressure Line
TRAVEL BRAKE
TRAVEL BRAKE
HL
A
THIS SCHEMATIC IS FOR THE 330D EXCAVATOR HEAVY LIFT AND FINE SWING PART #: 259-7414 HE01
Pi2
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
10
9
8
7
6
5
4
3
2
1