RENR9510-03
September 2009
System 2: Combined Function
330D and 336D Excavator
Hydraulic System - Attachment
330D:
NBD1-UP
FFK1-UP
EAH1-UP
EDX1-UP
MEY1-UP
336D:
PRF1-UP
WRK1-UP
MPL1-UP
JBT1-UP
KKT1-UP
PGW1-UP
Printed in U.S.A.© 2009 Caterpillar, All Rights Reserved
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)
PUMP
(2 - SECTION)
SPRING
(ADJUSTABLE)
VARIABILITY LINE RESTRICTION
(VARIABLE)
PRESSURE
COMPENSATION
PUMP
(VARIABLE & PRESSURE
COMPENSATED)
MEASUREMENT
PRESSURE TEMPERATURE FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH - PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVE ENVELOPES VALVE PORTS
FLUID CONDITIONERPUMP OR MOTOR
FLUID POWER SYMBOLS
UNIDIRECTIONAL
BIDIRECTIONAL
RELEASED PRESSURE
EXTERNAL RETURN INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED
HYDRAULIC PUMPS
ACCUMULATORS
SPRING LOADED GAS CHARGED
SOLENOID
OR MANUAL
SOLENOID
& PILOT
SOLENOID &
PILOT OR MANUAL
SOLENOID SERVO THERMAL DETENT
HYDRAULIC & PNEUMATIC CYLINDERS
DOUBLE ACTINGSINGLE ACTING
BASIC
SYMBOL
SPRING
LOADED
CHECK VALVES
2 POSITION
INFINITE
POSITIONING
FLOW IN ONE
DIRECTION
FLOW IN
EITHER
DIRECTION
3 POSITION
CROSS
FLOW
PARALLEL
FLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
AB
PT
AB
PT
SHIFTED POSITION INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOT
CONTROLLED
MAIN AUX
LINE RESTRICTION
(VARIABLE & PRESSURE
COMPENSATED)
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FLUID STORAGE RESERVOIRS
CROSSING & JOINING LINES
VALVES
PILOT CONTROL SYMBOLS
COMBINATION CONTROLS
BASIC COMPONENT SYMBOLS
ENERGY TRIANGLES
HYDRAULIC PNEUMATIC
INTERNAL
SUPPLY PRESSURE
COMPLETE
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
HYDRAULIC SYMBOLS (ELECTRICAL)
ELECTRICAL SYMBOLS TABLE
325-AG135 PK-14
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
WIRE
WIRE
(EXAMPLE VALVE)
CURRENT STANDARD
TRANSDUCER
(FLUID)
M
ELECTRIC MOTORTRANSDUCER
(GAS / AIR)
G
GENERATOR
PRESSURE SWITCH ELECTRICAL WIREPRESSURE SWITCH
(ADJUSTABLE)
TEMPERATURE
SWITCH
PRESSURE
SWITCH
TEMPERATURE
SWITCH
LEVEL
SWITCH
FLOW
SWITCH
ELECTRICAL SYMBOLS (ELECTRICAL)
A
CIRCUIT NUMBER
IDENTIFICATION
WIRE
COLOR
WIRE GAUGE
T
RENR9510-03
16 Page, (Dimensions: 34 inches x 24 inches)
Description
Part
Number
Machine
Location
Schematic
Location
Schematic - Config 2 (Standard) 255-5865
Accumulator Gp Note B B-5
Block Note B C-8
Cylinder Gp Note A F-6
Boom Note A F-7
Stick Note A F-6
Filter Gp - Oil Note B A-5
Filter & Valve Gp - Pilot (Hydraulic Oil) Note B A-4
(Hydraulic Return) Note B B-7
Manifold Gp - Control (Pilot Oil) Note B A-6
Motor Gp - Fan Note B C-7
Motor Gp - Travel Note B F-3
Note B F-2
Motor Gp - Swing Note B F-8
Pump Gp - Piston Note B B-3
(Main Hydraulic) Note B B-3
Sensor As - Pump Pressure Not
e B A-2
Note B B-2
Switch As - Travel Pressure Note B D-8
Switch As - Pilot Pressure Note B A-8
Note B D-7
Swivel Gp Note B E-3
Valve Gp - Travel Counterbalance Note B E-4
Control Gp - Joystick Note B B-8
Valve Gp - Load Control Note B D-1
(Stick) Note B D-5
Valve Gp - Main Control Note B C-3
Valve Gp - Pilot Travel Note B D-7
Valve Gp - Press Reducing Boom/Swing Note B B-4
(Right) Note B B-7
(Right)
(Right)
(Right)
(Right)
Note B E-2
Valve Gp - Shuttle Note B A-8
Valve Gp - Swing Cushion Note B
Valve Gp - Control (Auxiliary) 259-7378 C-6
3
Valve Gp - Shuttle 123-2430 E-6
9
(EC2) 215-4890 F-5
2
Valve Gp - Check (1-Pump/2-Pump Flow)
215-4890 E-5
1
Valve Gp - Relief (with Block) 177-2653 E-5
6
Valve Gp - Pilot (Straight Travel)
206-3336
E-6
4
E-5
5
Valve Gp - Solenoid (Neg Flow Control,
Propn Red Valve)
171-0188 E-1
8
Valve Gp - Solenoid (Combination) 165-9549 E-7
7
Valve Gp - Check (Oil Cooler Bypass) Note B C-7
33
10
11
14
15
16
18
17
19
20
21
23
24
22
25
26
27
28
30
29
31
32
41
12
34
35
36
37
38
13
42
39
40
E-8
Component Locations
System 2: Combined Function Attachment
Standard 330D Config 2
Note A: Refer to parts manual for specific cylinder information.
Note B: Part numbers are located on the main Hydraulic System Schematic
according to the effectivity of the machine.
Tap
Number
Description
Schematic
Location
AA Pilot Pump Delivery Pressure A-4
BB Right Pump Delivery Pressure B-2
CC Pump Power Shift Pressure A-2
DD Left Pump Delivery Pressure A-2
EE Left Pump Negative Flow Signal Pressure E-
1
FF Right Pump Negative Flow Signal Pressure E-1
SOS Hydraulic Oil Sampling Port A-4
MACHINE COMPONENT LOCATIONS
MAIN PUMP & FILTER GP
LINES GP - PILOT (SYSTEM 2)
SOS
AABB CC DD
17 1918
2625
EE
FF
7
8
SECTION A-A
PUMP COMPARTMENT VIEW
TOP VIEW
VIEW C-C
VIEW B-B
VIEW D-D
EE
FF
87
26
7
3
9
5
4
1
B
B
DD
CC
(Left)
(Left)
(Left)
(Left)
(Boom)
(Hydraulic Fan)
(Case Drain)
Bucket
(Left)
(Right)
(Left)
(EC1)
2423
41 42
1817
19
722
40
32 29
39
14
103
34 35
20
36 38
12
13 15
7
16
3321
26
28
25
27
26
28
25
27
1817
19
8
11
24
42
22 32
40
13 15
12
15
41
23
21 33
39
29
16
14
1
6
2
35
38
34
36
3
2010
118
21
6
54
30 31
9
37
54
30 31
9
37
A
A
LINES GP - PILOT COMBINED FCTN, 2-HYD PEDALS
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)
YY
52
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
PILOT PUMP OUTPUT
RIGHT MAIN PUMP OUTPUT
FAN PUMP OUTPUT
LEFT AND RIGHT MAIN PUMP POWER SHIFT CIRCUIT
NEGATIVE FLOW CONTROL CIRCUIT
SUPPLY LINE
STICK CYLINDER CONTROL CIRCUIT
LEFT TRAVEL MOTOR CONTROL CIRCUIT
SYSTEM 2 ATTACHMENT CONTROL CIRCUIT
SWING MOTOR CONTROL CIRCUIT
DRAIN / RETURN LINE
LEFT MAIN PUMP OUTPUT
TRAVEL SPEED CONTROL CIRCUIT
BUCKET CYLINDER CONTROL CIRCUIT
RIGHT TRAVEL MOTOR CONTROL CIRCUIT
BOOM CYLINDER CONTROL CIRCUIT
RENR9510-03
16 Page, (Dimensions: 34 inches x 24 inches)
THIS SCHEMATIC IS FOR THE 330D AND 336D EXCAVATOR
ATTACHMENT: SYSTEM 2
MEDIA NUMBER: RENR9510-03
PART NUMBER: 255-5854, CHANGE: 02, VERSION: HE
Components are shown installed on a fully operable machine.
Refer to the appropriate Service Manual for Troubleshooting, Specifications.
A
B
C
D
E
1234567
A
B
C
D
E
1234567
EE
FF
SOS
AA
BB
CC
DD
R.C.V : RETURN CHECK VALVE
C.F : COMBINED FUNCTION
VALVE GP
SOLENOID
(NEGATIVE
FLOW CONTROL,
PROPN RED VALVE)
171-0188
μ
μ μ
μ
μ
μ μ
μ
μ
μ μ
μ
μ
μ μ
μ
μ
μ μ
μ
μ
μ μ
μ
μ
μ μ
μ
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
JRP
JRT
Di2
Pi2
Pi3
Di3
DST
Di1
T
AL4
aL4
SPi
SDr
SP3
Di4
Pi4
Pi1
BP3
BDr BPi
BP2
R3
aR5
AR5
BR5
AR2
BR2
aL3
P
T
A1
A2
B1
B2
SINGLE
DOUBLE
SINGLE
DOUBLE
SWING MOTOR
P1
P2
B1
B2
A1
A2
T
P2
Pi1
P1
DR1
DR2
DR3 DR4
DR5
DR6
P-IN
PSA1
PSA2
T-OUT1
T-OUT2
Pi2
FA1
FB1
DR
DR
IN
OUT
bR5
A
B
Pi5
A
B
TT
TP
T
PG
PC
PAC
PP3
PP3
A
B
B
A
T1
T1
TRAVEL MOTOR (LEFT)
TRAVEL MOTOR (RIGHT)
T2
T2
G
F
SP2
AG
AG
BG
BG
E
AG
DR
MU
BG
AG
B
A
Pi1
Ps2
Pi2
D1
Ps1
S1
S
B
Dr1
Psv
a4
a1
a3
L
a2
a5
L1
M1
M2
A4
D0
A1
A2
A3
A4 A5
A6
A7
A8
B1
B2
B3 B4
B5
B6
B7
B8
STICK
CYLINDER
BOOM
CYLINDER
BUCKET
CYLINDER
BOOM
CYLINDER
aL1 bL1 bR1 aR1
BL2 AL2
NO.1
(TRAVEL)
NO.2
(SWING)
NO.3
(LOCK)
AR3
AR4
aR4
BR3
aR3
aR2
bR2
aR1
BR1AR1
aL1
AL1
BL1
aL2
BL2
AL2
BL3
AL3
bL4
bL3 bL2 bL1 bR4
bR3
BR4
bR1
Pb1
Pa1
R.C.V-CR.C.V-B
R.C.V-A
C.F-C
C.F-A C.F-B
C.F-D
R.C.V-D
R.C.V-C
R.C.V-D
R.C.V-B
R.C.V-A
PL PR
PR
PL
HL
HR
HR
HL
μ
μ μ
μ
DR
A1
B1
DR
DR1
L2
L3
A
B
F2
STICK(2)
BOOM(1)
ATCH
BUCKET
TRAVEL(R)
TRAVEL(L)
SWING
STICK(1)
BOOM(2)
(UP)
(OUT)
(IN)
(R)
(L)
(FWD)
(BACK)
(FWD)
(BACK)
(OPEN)
(CLOSE)
(UP)
(DOWN)
(OUT)
(IN)
ST
SP1
BL3
BT
BP1
BR4
R2
R1
aR3 aR4 bR3 bR4 bL3 bL4 aL2bL2
AL3 BL3 AR3 BR3
AR4 BR4
BL1 AL1 BR1 AR1
VALVE GP
CHECK
(1-PUMP/2-PUMP
FLOW)(EC2)
215-4890
VALVE GP
CHECK
(1-PUMP/2-PUMP
FLOW)(EC1)
215-4890
MOTOR GP
SWING
VALVE GP
SWING CUSHION
VALVE GP
TRAVEL
COUNTERBALANCE
(LEFT)
VALVE GP
TRAVEL
COUNTERBALANCE
(RIGHT)
MOTOR GP
TRAVEL (RIGHT)
MOTOR GP
TRAVEL (LEFT)
SWIVEL GP
VALVE GP
PILOT (TRAVEL)
SWITCH AS.
TRAVEL PRESS
(RIGHT)
SWITCH AS.
TRAVEL PRESS
(LEFT)
BLOCK
VALVE GP
CHECK (OIL
CO0LER BYPASS)
MOTOR GP
FAN
CONTROL GP
JOYSTICK
(RIGHT)
CONTROL GP
JOYSTICK
(LEFT)
VALVE GP
SHUTTLE
SWITCH AS.
PILOT PRESS
SLOW RETURN BYPASS
OIL COOLER
FILTER GP
OIL
(HYDRAULIC RETURN)
RETURN
MANIFOLD GP
CONTROL
(PILOT OIL)
FILTER GP
OIL
(CASE DRAIN)
ACCUMULATOR GP
VALVE GP
PRESSURE
REDUCING
(BOOM, SWING
PRIORITY)
FILTER & VALVE GP
PILOT
(HYDRAULIC OIL)
PUMP GP
PISTON
(HYDRAULIC FAN)
PUMP GP
PISTON
(MAIN)
SENSOR AS
PUMP PRESSURE
(RIGHT)
SENSOR AS
PUMP PRESSURE
(LEFT)
VALVE GP
MAIN CONTROL
VALVE GP
LOAD CONTROL
(BOOM)
VALVE GP
LOAD CONTROL
(STICK)
VALVE GP
PILOT
(STRAIGHT TRAVEL)
(LEFT)
206-3336
VALVE GP
PILOT
(STRAIGHT
TRAVEL)
(RIGHT)
206-3336
VALVE GP
SOLENOID
(COMBINATION)
165-9549
VALVE GP
SHUTTLE
123-2430
VALVE GP
RELIEF
(WITH BLOCK)
177-2653
2 PUMP
FLOW
S3 S2 S1
A3
T
P3 P1
13
LP LT RP RT
2132
A2 A1
1 PUMP
FLOW
SINGLE
ACTION
DOUBLE
ACTION
Pb1
bR2aR2
Pa1
C.F-C
C.F-D
C.F-A C.F-B
VALVE GP
CONTROL
(AUXILIARY)
259-7378
SWITCH AS
PRESSURE
(PILOT,BOOM UP)
SWITCH AS
PRESSURE
(PILOT,BOOM UP)
