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EC-C3
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Hydraulic System - Attachment
330D and 336D Excavator
330D:
GGE1-UP
THJ1-UP
PEL1-UP
LRM1-UP
ERN1-UP
RAS1-UP
T2Y1-UP
336D:
LMG1-UP
MYG1-UP
PPN1-UP
JWR1-UP
©
2010 Caterpillar, All Rights Reserved
Printed in U.S.A.
RENR9469-03
March 2010
Fine Filtration
2010 Caterpillar, All Rights Reserved
©
COMPONENT LOCATIONS
Description
FINE FILTRATION ATTACHMENT
MAIN SCHEMATIC - HEAVY LIFT AND FINE SWING
Part
Number
Machine
Location
Schematic
Location
ACCUMULATOR - HYDRAULIC (PILOT OIL)
A
B-7
CYLINDER GP - BOOM
3 F-3
CYLINDER GP - BUCKET
4
F-4
F-9CYLINDER GP - STICK 5
FILTER GP - OIL (HYDRAULIC RETURN)
6
A-9
FILTER GP - OIL (PILOT)
7
A-5
FILTER GP - OIL (CASE DRAIN)
8
MANIFOLD GP - CONTROL (PILOT OIL) B-89
MOTOR GP - PISTON A-1010
PUMP GP - PISTON (HYDRAULIC FAN) B-414
A-9
11MOTOR GP - SWING
12
13
(LEFT)
(RIGHT)
(LEFT)
(RIGHT)
G-8
MOTOR GP - TRAVEL
15
G-7
G-5
16
PUMP GP - PISTON (MAIN)
17
B-3
E-6SWIVEL GP
A
19
F-7
VALVE GP - PILOT (TRAVEL)
20
E-10
VALVE GP - SHUTTLE
21
C-10
VALVE GP - CHECK (OIL COOLER BYPASS)
22
B-10
VALVE GP - LOAD CONTROL
(STICK DRIFT RED, RELIEF LINE)
23
D-7
VALVE GP - LOAD CONTROL
(BOOM DRIFT RED, RELIEF LINE)
A
D-3
VALVE GP - MAIN CONTROL
27
28
VALVE GP - SWING CUSHION (FINE SWING)
VALVE GP - TRAVEL COUNTERBALANCE
Note B: Part numbers are located on the main Hydraulic System Schematic
according to the effectivity of the machine.
F-830
VALVE GP - SOLENOID (HEAVY LIFT) B-5A
D-2
31
32
VALVE GP - PILOT CONTROL (LEFT JOYSTICK) D-10
VALVE GP - PILOT CONTROL (RIGHT JOYSTICK) D-9
VALVE GP - PRESSURE REDUCING
(BOOM, SWING PRIORITY)
B-5
A A-6
VALVE GP - PRESSURE REDUCING
(STICK-IN PRIORITY)
A
B-6
NOTE A
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE B
NOTE A
NOTE A
FILTER GP - OIL (HYDRAULIC)
250-0728
259-7491
1
B-9
SCHEMATIC - HEAVY LIFT AND FINE SWING
Note A: Refer to parts manual for specific cylinder information.
F-5
B-5
2010 Caterpillar, All Rights Reserved
©
TAP LOCATIONS
Tap Locations
Pressure, Sampling, and Sensor
Tap
Number
Description
Schematic
Location
AA Pilot Filter Pressure Test Port A-5
BB Drive Pump Pressure Test Port B-2
CC Power Shift Pressure Test Port B-2
SOS Hydraulic Oil Sampling Port A-5
DD Idler Pump Pressure Test Port A-2
EE Fine Filtration Pressure Test Port B-9
©
2010 Caterpillar, All Rights Reserved
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 RESTRICTION
VARIABLE and PRESSURE
COMPENSATED
PRESSURE
COMPENSATION
PUMP: VARIABLE and
PRESSURE COMPENSATED
ENERGY TRIANGLES
HYDRAULIC PNEUMATIC
MEASUREMENT
PRESSURE
TEMPERATURE
FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
HYDRAULIC PUMPS
FLUID STORAGE RESERVOIRS
CROSSING AND JOINING LINES
VALVE ENVELOPES
VALVE PORTS
BASIC COMPONENT SYMBOLS
FLUID CONDITIONER
PUMP or MOTOR
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILOT CONTROL SYMBOLS
RELEASED PRESSURE
EXTERNAL RETURN
INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED
COMPLETE
INTERNAL
SUPPLY PRESSURE
ACCUMULATORS
SPRING LOADED GAS CHARGED
SOLENOID
or MANUAL
SOLENOID
and PILOT
SOLENOID and
PILOT or MANUAL
COMBINATION CONTROLS
SOLENOID
SERVO
THERMAL
DETENT
HYDRAULIC AND PNEUMATIC CYLINDERS
DOUBLE ACTINGSINGLE ACTING
BASIC
SYMBOL
SPRING
LOADED
CHECK VALVES
TWO
POSITION
INFINITE
POSITIONING
FLOW IN ONE
DIRECTION
FLOW ALLOWED IN
EITHER DIRECTION
THREE
POSITION
CROSS
FLOW
PARALLEL
FLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
A B
P T
A B
P T
SHIFTED POSITION
INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOT
CONTROLLED
©
2010 Caterpillar, All Rights Reserved
ELECTRICAL SYMBOLS
Hydraulic Symbols (Electrical)
325-AG135 PK-14
Circuit Identification
Number
Wire Color
Wire Gauge
Harness identification code
This example indicates
wire 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 Color
Circuit Number
Identification
B
A
Wire
Wire
(EXAMPLE VALVE)
Current Standard
Transducer
(Fluid)
Transducer
(Gas / Air)
G
Generator
Electrical Wire
Pressure Switch
M
Electric Motor
Pressure Switch
(Adjustable)
Temperature Switch
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Electrical Symbols (Electrical)
T
DRAIN / RETURN LINE
LINES GROUP COLOR DESCRIPTIONS
IMPLEMENT & LEFT TRAVEL PUMP OUTPUT
IMPLEMENT & RIGHT TRAVEL PUMP OUTPUT
PILOT PUMP OUTPUT
ATTACHMENT CONTROL CIRCUIT
SUPPLY LINE
BUCKET CONTROL & BUCKET CYLINDER CIRCUIT
RIGHT TRAVEL CONTROL & RIGHT TRAVEL MOTOR CIRCUIT
FAN PUMP OUTPUT
POWER SHIFT CONTROL CIRCUIT
TRAVEL SPEED CONTROL CIRCUIT
STICK CONTROL & STICK CYLINDER CIRCUIT
SHUTTLE VALVE CONTROL CIRCUIT
BOOM CONTROL & BOOM CYLINDER CIRCUIT
HEAVY LIFT CONTROL CIRCUIT
LEFT TRAVEL CONTROL & LEFT TRAVEL MOTOR CIRCUIT
SWING CONTROL & SWING MOTOR CIRCUIT
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling, Sensor) by letter
Components by number
Connections by letter
YY
1
AA
A
B
C
D
E
F
G
12345678910
12345678910
A
B
C
D
E
F
G
Pi3
(31)VALVE GP
TRAVEL
COUNTERBALANCE
(32)VALVE GP
TRAVEL
COUNTERBALANCE
(13)MOTOR GP
TRAVEL
(11)MOTOR GP
SWING
(30)VALVE GP
SWING CUSHION
(FINE SWING)
(23)VALVE GP
PILOT (TRAVEL)
(16)SWIVEL GP
LEFT
PUMP
RIGHT
PUMP
AL3
AL3
BL3
BL3
AR3
AR3
BR3
BR3
(5)STICK CYLINDER
(4)BUCKET CYLINDER
AR4 BR4
(3)BOOM CYLINDER
AR4
BR4
aR4 bR3 bR4
bL2 bL4 aL2
aR4
bR3
bR4
bL2bL4
aL2
bR1 aR1
aL1
bL1
bR1
aR1
aL1
bL1
AL2BL2
BL1 AL1
BR1
AR1
BR1
AR1
BL1
AL1
AL2
BL2
PR
PR
PL
PRESSURE
SENSOR
PRESSURE
SENSOR
PL
bL3
bL3
aR3
aR3
TRAVEL(L)
TRAVEL(R)
T1
T5
BACK
FWD
BACK
FWD
T2
T4
T6
T3
JLP
JLT
STICK
SWING
OUT
JL1
IN
JL3
R
L
JL2
JL4
BUCKET
BOOM
OPEN
CLOSE
DOWN
UP
JR1
JR2
JR3
JR4
A1
A2 A3 A4 A5 A6 A7 A8
B1 B2
B3
B4
B5
B6
B7
B8
T1
T1
A
B
A
B
P2 Pi1
P1
DR1
DR2
DR3
DR4 DR5
DR6
P-IN PSA1PSA2
T-OUT1
T-OUT2
Pi2
HL
Di2
STICK(2)
BOOM(1)
ATCH
BUCKET
TRAVEL(R)
TRAVEL(L)
SWING
STICK(1)
Pi2
Di3
DST
bR2
Di1
HR
T
AL4
aL4
SPi
SDr
SP3
Di4
Pi4
Pi1 BP3 BDr BPi
BP2
R3aR5AR5BR5
AR2BR2
aR2
(UP)
(OUT)
(IN)
(R)
(L)
(FWD)
(REV)
(FWD)
(REV)
(OPEN)
(CLOSE)
(UP)
(DOWN)
(OUT)
PG
DR
MU
AB
P1
P2
T
A1 A2B1 B2
aL3
A
C
B
D
E
F
G
JRP
JRT
bR5
INOUT
T
DR
A1
B1
X
X
B
I
P
F
D
A4
Pi2
Pi1
Dr1
Di
PS2
L
L1
S
RR
FR
U
PAC
A
T
P
Pi5
P1
P2
T
A1 A2B1 B2
A
P
T
TT
TP
NO.1
(TRAVEL)
NO.2
(SWING)
NO.3
(LOCK)
µ
µ µ
µµ
µ µ
µ
DR
DR1
L2
L3
A
B
µ
µ µ
µ
D0 PS1
B
A1
a1
a4
a3
a2
a5
A2
PSV
BOOM(2)
TRAVEL MOTOR (LEFT) TRAVEL MOTOR (RIGHT)SWING MOTOR
PRESSURE SWITCH
PRESSURE SWITCH PRESSURE SWITCH
PROPORTIONAL
REDUCING VALVE
DRIVE PUMP
PRESSURE
POWER SHIFT
PRESSURE
IDLER PUMP
PRESSURE
(17)VALVE GP
CHECK (OIL
CO0LER BYPASS)
(22)VALVE GP
PILOT CONTROL
(RIGHT JOYSTICK)
(21)VALVE GP
PILOT CONTROL
(LEFT
JOYSTICK)
(10)MOTOR
GP PISTON
(27)VALVE GP
SHUTTLE
(A)VALVE GP
PRESSURE REDUCING
(STICK-IN PRIORITY)
(8)FILTER GP
OIL (PILOT)
(A)VALVE GP
SOLENOID
(HEAVY
LIFT)
(A)VALVE GP
PRESSURE
REDUCING
(BOOM, SWING
PRIORITY)
(A)VALVE GP
PRESSURE REDUCING
(BOOM, SWING
PRIORITY)
(28)VALVE
GP SHUTTLE
(A)ACCUMULATOR GP
(6)FILTER GP
OIL
(CASE DRAIN)
(9)MANIFOLD
GP CONTROL
(PILOT OIL)
(15)PUMP GP
PISTON (MAIN)
(20)VALVE GP
MAIN CONTROL
(A)VALVE GP
LOAD CONTROL
(BOOM)
(14)PUMP GP
PISTON
(HYDRAULIC FAN)
TRAVEL BRAKE TRAVEL BRAKE
SLOW RETURN BYPASS
OIL COOLER
TRAVEL SPEED SWING
PRIORITY
RETURN
DRAIN
STICK DRIFT REDUCTION BOOM DRIFT REDUCTION
MAIN
RELIEF
(12)MOTOR GP
TRAVEL
(19)VALVE GP
LOAD CONTROL
(STICK)
AA SOS
DD
BB
CC
PILOT
FILTER
PRESSURE
HYDRAULIC
OIL
SAMPLING
(1)FILTER GP
OIL(HYDRAULIC)
250-0728
(7)FILTER GP
OIL(HYDRAULIC)
250-0728
FINE FILTRATION
PRESSURE
EE
THIS SCHEMATIC IS FOR THE 330D AND 336D EXCAVATOR - FINE FILTRATION
PART #: 273-7102 V00
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
2010 Caterpillar, All Rights Reserved
©
MACHINE COMPONENT LOCATIONS
A
32
31
30
28
27
23
22
21
20
19
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
1
VIEW ALL CALLOUTS
2010 Caterpillar, All Rights Reserved
©
ACCUMULATOR
A
VIEW ALL CALLOUTS
2010 Caterpillar, All Rights Reserved
©
LINES GP - FILTER (FINE FILTRATION)
LEFT SIDE VIEW
TOP VIEW
CC
1
VIEW ALL CALLOUTS
2010 Caterpillar, All Rights Reserved
©
MOTOR GP - SWING SWIVEL
A
16
9
VIEW ALL CALLOUTS
2010 Caterpillar, All Rights Reserved
©
PUMP GP - PISTON (MAIN)
SOS
DD
CCCC
BB
AA
15
8
7
6
VIEW ALL CALLOUTS
2010 Caterpillar, All Rights Reserved
©
VALVE GP - MAIN CONTROL
20
11
VIEW ALL CALLOUTS
