RENR9887-02
September 2009
Heavy Lift
330D and 336D Excavator
Hydraulic System - Attachment
330D:
NBD1-UP
MEY1-UP
336D:
PRF1-UP
WRK1-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
RENR9887-02
16 Page, (Dimensions: 34 inches x 24 inches)
Description
Part
Number
Machine
Location
Schematic
Location
ACCUMULATOR - HYDRAULIC (PILOT OIL) B-6
CYLINDER GP - BOOM G-3
CYLINDER GP - BUCKET G-10
G-9CYLINDER GP - STICK
FILTER GP - OIL (HYDRAULIC RETURN) A-9
FILTER GP - OIL (PILOT) A-5
FILTER GP - OIL (CASE DRAIN)
MANIFOLD GP - CONTROL (PILOT OIL) B-8
MOTOR GP - PISTON A-10
PUMP GP - PISTON (HYDRAULIC FAN)
B-4
A-6
255-5865
MOTOR GP - SWING G-8
MOTOR GP - TRAVEL G-5, G-7
PUMP GP - PISTON (MAIN) B-3
F-6SWIVEL GP
F-5, F-7
VALVE GP - PILOT (TRAVEL) E-10
VALVE GP - SHUTTLE C-10
VALVE GP - CHECK (OIL COOLER BYPASS) B-10
V
ALVE GP - LOAD CONTROL
(STICK DRIFT RED, RELIEF LINE)
E-7
VALVE GP - LOAD CONTROL
(BOOM DRIFT RED, RELIEF LINE)
E-3
B-6
VALVE GP - SWING CUSHION
VALVE GP - TRAVEL COUNTERBALANCE
F-8
VALVE GP - SOLENOID (HEAVY LIFT) 121-6303 B-6
VALVE GP - MAIN CONTROL 285-1540 D-2
3
4
5
6
7
8
9
10
11
14
12
13
15
16
17
18
19
20
21
22
23
24
25
26
2
1
27
VALVE GP - PILOT CONTROL (LEFT JOYSTICK) D-10
VALVE GP - PILOT CONTROL (RIGHT JOYSTICK) D-9
VALVE GP - PRESSURE REDUCING (BOOM,
SWING PRIORITY)
B-6
COMPONENT LOCATIONS
MACHINE COMPONENT LOCATIONS
Tap Locations
Pressure, Sampling, and Sensor
Tap
Number
Description
Schematic
Location
AA Pilot Filter Pressure Test Port A-6
BB Drive Pump Pressure Test Port B-2
CC Power Shift Pressure Test Port A-2
SOS Hydraulic Oil Sampling Port A-5
DD Idler Pump Pressure Test Port A-2
NOTE A
NOTE B
NOTE A
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 A: Refer to Parts Manual for your specific machine.
Note B: Part numbers are located on the main Hydraulic System Schematic accoring to
the effectivity of the machine.
20
22
21
4
16
5
7
3
2713
14
11
2713
2612
18
23
15
9
6
8
24
119
17
10 25
2
Pump Compartment
(A) Delivery line (Drive Pump)
(B) Delivery line (IdlerPump)
(C) Drive Pump
(D) Idler Pump
13
27
1
18
11
D
C
A
B
19
9
7
8
12
26
16
MOTOR GP - PISTON (TRAVEL) FILTER GP
MOTOR GP - SWING & SWIVELVALVE GP - MAIN CONTROL
PUMP
GP - PISTON (MAIN)
SOS
AA
BB
CC
Attachment
SCHEMATIC - MAIN
Standard 330D
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
IMPLEMENT & LEFT TRAVEL PUMP OUTPUT
HEAVY LIFT CONTROL CIRCUIT
FAN PUMP OUTPUT
POWER SHIFT CONTROL CIRCUIT
SUPPLY LINE
SHUTTLE VALVE CONTROL CIRCUIT
STICK CONTROL & STICK CYLINDER CIRCUIT
LEFT TRAVEL CONTROL & LEFT TRAVEL MOTOR CIRCUIT
ATTACHMENT CONTROL CIRCUIT
SWING CONTROL & SWING MOTOR CIRCUIT
DRAIN / RETURN LINE
IMPLEMENT & RIGHT TRAVEL PUMP OUTPUT
TRAVEL SPEED CONTROL CIRCUIT
BUCKET CONTROL & BUCKET CYLINDER CIRCUIT
RIGHT TRAVEL CONTROL & RIGHT TRAVEL MOTOR CIRCUIT
BOOM CONTROL & BOOM CYLINDER CIRCUIT
RENR9887-02
16 Page, (Dimensions: 34 inches x 24 inches)
THIS SCHEMATIC IS FOR THE 330D AND 336D EXCAVATOR
ATTACHMENT: HEAVY LIFT
MEDIA NUMBER: RENR9887
PART NUMBER: 259-7421, CHANGE: 01, 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
AL3 BL3
AR3 BR3
AR4 BR4
STICK CYLINDER
PUMP GP
PISTON (MAIN)
R.C.V.: RETURN
CHECK VALVE
BUCKET CYLINDER
BOOM CYLINDER
VALVE GP
SHUTTLE
FILTER GP
OIL (PILOT)
VALVE GP
SOLENOID
(HEAVY LIFT)
121-6303
VALVE GP
PRESSURE REDUCING
(BOOM, SWING
PRIORITY)
ACCUMULATOR GP
164-6981
FILTER GP
OIL
(CASE DRAIN)
MANIFOLD GP
CONTROL (PILOT OIL)
FILTER GP
OIL
(HYDRAULIC
RETURN
MOTOR GP
PISTON
VALVE GP
CHECK (OIL
COOLER BYPASS)
VALVE GP
LOAD CONTROL
(STICK DRIFT RED,
RELIEF LINE)
VALVE GP
LOAD CONTROL
(BOOM DRIFT RED,
RELIEF LINE)
VALVE GP
MAIN CONTROL
285-1540
VALVE GP
TRAVEL COUNTERBALANCE
MOTOR GP
SWING
MOTOR GP
TRAVEL
VALVE GP
SWING CUSHION
bR1 aR1
aL1 bL1
TRAVEL(L)
TRAVEL(R)
VALVE GP
PILOT (TRAVEL)
T1
T5
BACK
FWD
BACK
FWD
TTTP
T2
T4
T6
T3
PRESSURE SWITCH PRESSURE SWITCH
aR3 aR4 bR3 bR4 bL3 bL2 bL4 aL2
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
VALVE GP
SHUTTLE
JRT
VALVE GP
PILOT CONTROL
(LEFT JOYSTICK)
VALVE GP
PILOT CONTROL
(RIGHT JOYSTICK)
JRP
PRESSURE SWITCH
R.C.V-A
R.C.V-B
R.C.V-C
A
C
B
D
DR1 DR
B
A
L3 L2
E
F
G
SLOW RETURN BYPASS
OIL COOLER
RETURN
IN
OUT
T
TP
DRAIN
TRAVEL BRAKE
ABAB
AG
Pp3Pp3
T1
T2
T1
T2
BGBG
AG
TRAVEL MOTOR (LEFT) TRAVEL MOTOR (RIGHT)
MOTOR GP
TRAVEL
VALVE GP
TRAVEL COUNTERBALANCE
SWIVEL GP
BL1 AL1
BR1
AR1
TRAVEL BRAKE
AL2
BL2
PG
DR
MU
BG
AG
B
A
SWING MOTOR
DR
A1
B1
R.C.V-C
P2 Pi1 DR1
DR2
DR3 DR4 DR5 DR6
P-IN PSA1PSA2
T-OUT1
T-OUT2
Pi2
NO.1
(TRAVEL)
NO.2
(SWING)
NO.3
(LOCK)
P1
TRAVEL SPEED SWING
PRIORITY
N
O
I
T
A
V
I
T
C
A
C
I
L
U
A
R
D
Y
H
PAC
bL3bL4
bL2
aL2
bR4 HR
aR4
bR3
aR3
aL1
bL1
aR1
bR1
R.C.V-B
R.C.V-A
AL2
BL2
BL1
AL1
AR1
BR1
BR4
AR4
BR3
AR3
AL3BL3
PR
PR
PL
PL
HL
HL
HR
PRESSURE
SENSOR
D
I
LEFT
PUMP
RIGHT
PUMP
PRESSURE
SENSOR
T
O
L
I
P
BOOM DRIFT REDUCTION
STICK DRIFT REDUCTION
PROPORTIONAL
REDUCING VALVE
MAIN
RELIEF
A
P1 P2
Di2
BOOM(2)
Di3Pi2 Pi3
A1 B2 A2
T
S
B
L
L1
A4 S1
Dr1
D1 Ps2
D0 Ps1
Pi1
a4
a1
M1
Psv
a3
M2
a5
a2
Pi2
DST Pi5 bR2 Di1 bR5
BR4
BP1 BT
R1 BR5 AR5
aR5 R3
(IN)
BP3
BDr
BPi
BP2
Pi1
(DOWN)(CLOSE)
AR2
BR2
aR2
(BACK)(BACK)
Di4 Pi4
(L)(IN)
aL3SP1 ST
BL3 R2
T AL4 aL4
(UP)
SP3
SDr
SPi SP2
STICK(1)
SWING
TRAVEL(L)
TRAVEL(R)
ATCH
BUCKET
(OPEN)
(FWD)
(R)
(OUT)
BOOM(1)
STICK(2)
(OUT)
(UP)
PUMP GP
PISTON
(HYDRAULIC FAN)
PG PC
AA
PILOT
FILTER
PRESSURE
SOS
HYDRAULIC
OIL
SAMPLING
DRIVE PUMP
PRESSURE
TEST PORT
POWER SHIFT
PRESSURE
TEST PORT
IDLER PUMP
PRESSURE
TEST PORT
DD
BB
CC
MAIN
