RENR9468-03
January 2010
330D and 336D Excavator
Hydraulic System - Attachment
Printed in U.S.A.© 2010 Caterpillar, All Rights Reserved
System 17: Combined Function with Medium Pressure
330D:
GBC1-UP
GGE1-UP
THJ1-UP
PEL1-UP
LRM1-UP
ERN1-UP
RAS1-UP
T2Y1-UP
336D:
JBF1-UP
MYG1-UP
KDJ1-UP
PPN1-UP
MYP1-UP
DTS1-UP
WET1-UP
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
RENR9468-03
24 Page, (Dimensions: 34 inches x 28 inches)
PUMP GP
TAP LOCATIONS
2
4
18
52
52
179 21
3
35 21
41
36
2
2
11
43 19
20
6
45
7
10
21
41
17
13 14
15
32
30
31
51
28
37
9 10
14
13
15
2021
36
35
3
11
1943
51
28
37
44
5
16
18
44
16
29 40
29
40
6
45
7
5
1
1
50
50
4
40
26
24
26
24
22
32
30
31
22
38
38
33
33
39
39
SOS
CC
6
5
7
13
AA
BB
34
34
50
42
2624
2351
PP
45
22
33
LL
KK
MM
GGNN
HH
II
JJ
OO
Note A: Refer to service manual for specific cylinder information.
Description
Part
Number
Machine
Location
Schematic
Location
Accumulator Gp - Pilot Manifold 164-6981 1 B-4
Cylinder Gp - Boom Note A 2 F-5
Cylinder Gp - Bucket Note A 3 E-5
Cylinder Gp - Stick Note A 4 F-5
Filter Gp - Case Drain 126-2075 5 A-4
Filter Gp - Pilot Hydraulic 158-8987 6 A-4
Filter Gp - Return Oil 188-4140 7 B-6
Motor Gp - Hydraulic Fan 234-4638 8 C-6
Motor Gp - Left Travel 271-6376 9 F-3
Motor Gp - Right Travel 271-6376 10 F-2
Motor Gp - Swing 200-3373 11 F-7
Pump Gp - Hydraulic Fan 259-0815 12 B-3
Pump Gp - Main and Pilot 283-6116 13 A-2
Sensor As - Left Pump Press. 221-8859 14 A-2
Sensor As - Right Pump Press. 221-8859 15 B-2
Switch As - Left Travel Pilot 167-3
466 16 D-7
Switch As - Pilot Pressure 167-3466 17 A-7
Switch As - Right Travel Pilot 167-3466 18 D-6
Swivel Gp 234-4440 19 E-3
Tank As - Hydraulic Oil 239-1661 20 A-5
Valve Gp - Check, Cooler Bypass 190-7745 21 C-7
Valve Gp - Control, Auxiliary 259-7378 22 D-5
Valve Gp - ECV, Check Solenoid 297-0370 23 F-4
Valve Gp - ECV1, Check Solenoid 297-0370 24 E-4
Valve Gp - ERV1, Sol. and Relief 244-8506 26 E-4
Valve Gp - Heavy Lift Solenoid 121-6303 28 B-4
Valve Gp - Left Travel Counterbalance 204-2819 29 E-3
Valve Gp - Load Control Boom Cylinder 255-5683 30 D-1
Valve Gp - Load Control Stick Cylinder 255-5680 31 D-4
Valve Gp - Main Control 285-1345 32 C-1 to C-6
Valve Gp - Neg. Flow Control 171-0188 33 E-1
Valve Gp - Pilot Manifold 215-5037 34 B-5
Valve Gp - Pilot, Bucket and Boom 270-5952 35 B-6
Valve Gp - Pilot, Stick and Swing 270-5951 36 B-7
Valve Gp - Press. Red. Bo
om/ Swing 232-4102 37 B-4
Valve Gp - Press. Red. Bucket/ Stick 232-4102 38 A-5
Valve Gp - Pressure Relief 206-3354 39 A-5
Valve Gp - Right Travel Counterbalance 204-2819 40 E-2
Valve Gp - Shuttle 185-0462 41 A-6
Valve Gp - Shuttle 259-7732 42 B-4
Valve Gp - Swing Cushion 158-9090 43 E-7
Valve Gp - Travel Pilot 270-5947 44 D-6
Valve Gp - Work Tool, (4 Function) 259-7429 45 E-1
Pump Gp - Auxiliary, Medium Pressure 207-8235 50 B-2
Valve Gp - Control, Med. Press. 232-4103 51 F-6
Valve Gp - Solenoid and Press. Reducing 259-7430 52 E-2
Component Locations
Attachments
Tap Locations
Pressure and Sampling
Tap
Number
Description
Schematic
Location
AA Left Pump Delivery Pressure B-1
BB Right Pump Delivery Pressure B-1
CC Pilot Pump Delivery Pressure A-4
GG Pilot Pressure Pb1 (B1), Attachment F-1
HH Pilot Pressure Pa1 (B2), Attachment F-1
II Pilot Pressure bR2 (B3), Att
achment F-1
JJ Pilot Pressure aR2 (B4), Attachment F-2
KK Right Pump Pilot Pressure E-1
LL Left Pump Pilot Pressure E-1
MM Pilot Pressure MPb1 (B1), Attachment E-2
NN Pilot Pressure MPa1 (B2), Attachment E-2
OO Pump Power Shift Pressure B-1
PP Auxiliary Pump Pressure F-7
SOS Hydraulic Oil Sampling Port A-4
MACHINE COMPONENT LOCATIONS
13
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
HEAVY LIFT CONTROL CIRCUIT
MEDIUM PRESSURE PUMP
LEFT AND RIGHT MAIN PUMP POWERSHIFT CIRCUIT
FAN PUMP AND CONTROL CIRCUIT
SUPPLY LINE
STICK CYLINDER CONTROL CIRCUIT
LEFT TRAVEL MOTOR CONTROL CIRCUIT
ATTACHMENT CONTROL CIRCUIT
SWING MOTOR CONTROL CIRCUIT
DRAIN / RETURN LINE
SWING BRAKE CONTROL CIRCUIT
RIGHT MAIN PUMP OUTPUT
TRAVEL SPEED CONTROL CIRCUIT
BUCKET CYLINDER CONTROL CIRCUIT
RIGHT TRAVEL MOTOR CONTROL CIRCUIT
BOOM CYLINDER CONTROL CIRCUIT
RENR9468-03
24 Page, (Dimensions: 34 inches x 28 inches)
THIS SCHEMATIC IS FOR THE 330D AND 336D EXCAVATOR HYDRAULIC SYSTEM
ATTACHMENT: SYSTEM 17: COMBINED FUNCTION WITH MEDIUM PRESSURE
MEDIA NUMBER: RENR9468-03
PART NUMBER: 255-5862, 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
F
1234567
A
B
C
D
E
F
1234567
VALVE GP
ECV
CHECK SOL.
MMNN
CC
SOS
VALVE GP
CONTROL
MEDIUM PRESSURE
232-4103
MOTOR GP
SWING
VALVE GP
ECV1
CHECK SOL.
VALVE GP
ERV1
CHECK / RELIEF
MOTOR GP
LEFT TRAVEL
VALVE GP
LEFT TRAVEL
COUNTERBALANCE
MOTOR GP
RIGHT TRAVEL
VALVE GP
RIGHT TRAVEL
COUNTERBALANCE
VALVE GP
WORK TOOL
4 - FUNCTION
VALVE GP
NEG. FLOW
CONTROL
VALVE GP
SOL. / REDUCING
AUXILIARY
259-7430
PUMP GP
AUXILIARY
MEDIUM PRESS.
PUMP GP
MAIN / PILOT
PUMP GP
HYDRAULIC FAN
SENSOR AS
RIGHT PUMP
SENSOR AS
LEFT PUMP
VALVE GP
CONTROL
AUXILIARY
VALVE GP
MAIN
CONTROL
FILTER GP
PILOT
HYDRAULIC
FILTER GP
CASE DRAIN
VALVE GP
HEAVY LIFT
SOLENOID
VALVE GP
PRESS. RED.
BOOM / SWING
VALVE GP
SHUTTLE
TANK AS
HYDRAULIC
VALVE GP
PRESSURE
RELIEF
VALVE GP
PRESS. RED.
BUCKET / STICK
SWITCH AS
PILOT
PRESSURE
VALVE GP
SHUTTLE
VALVE GP
PILOT
BUCKET / BOOM
VALVE GP
PILOT
STICK / SWING
VALVE GP
CHECK
COOLER BYPASS
MOTOR GP
FAN
FILTER GP
RETURN OIL
ACCUMULATOR GP
SWITCH AS
LEFT TRAVEL
PILOT PRESS.
SWITCH AS
RIGHT TRAVEL
PILOT PRESS.
VALVE GP
SWING CUSHION
FINE SWING
VALVE GP
TRAVEL PILOT
VALVE GP
LOAD CONTROL
STICK CYLINDER
VALVE GP
LOAD CONTROL
BOOM CYLINDER
VALVE GP
PILOT MANIFOLD
SWIVEL GP
aR3-a bL3-a
P1
P2
B1
B2
A1
A2
aR3 bL3
T
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
BR2aL3
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
P
A
T
Pi5
A
B
TT
TP
T
PG
PC
P
A1
A2
A3
A4
B4
B3
B2
B1
T
PAC
PP3
PP3
A
BB
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
T
P
A
B
B1
A1
A2
B2
P
T
M
LS
RETURN CHECK VALVE
MEDIUM PRESSURE VALVE
Pi1
Ps2
Pi2
D1
Ps1
S1
S
B
Dr1
Psv
a4
a1
a3
L
a2
a5
L1
M1
M2
A4
D0
A
S
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
Pb1Pa1bR2aR2
R.C.V-CR.C.V-B
R.C.V-A
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
DR
A1
B1
R.C.V-E
M.P.V-P
MPa1 MPb1
MPa1
MPb1
M.P.V-P
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-a aR4 bR3 bR4
bL3-a
bL4 aL2bL2
AL3 BL3
AR3 BR3
AR4 BR4
BL1 AL1 BR1 AR1
M.P.V.:
R.C.V.:
HHIIJJ GG
LL
KK
AA
BB
OO
PP
