RENR9586-05
30 Page, (Dimensions: 39 inches x 28 inches)
RENR9586-05
January 2012
330D and 336D Excavator
©
2012 Caterpillar
All Rights Reserved
Printed in U.S.A.
Without Heavy Lift and Fine Swing
336D MHPU
Hydraulic System
330D:
NBD1-UP
EAH1-UP
FFK1-UP
MEY1-UP
336D:
PRF1-UP
WRK1-UP
MPL1-UP
ZML1-UP
JBT1-UP
KKT1-UP
PGW1-UP
336D MHPU:
J6D1-UP
Hydraulic Symbols (Electrical)
Electrical Symbols Table
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
T
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Electrical Symbols (Electrical)
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
FLUID POWER SYMBOLS
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 ACTING
SINGLE 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
AB
PT
AB
PT
SHIFTED POSITION
INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOT
CONTROLLED
Pump Compartment
(A) Delivery line (Drive Pump)
(B) Delivery line (IdlerPump)
(C) Drive Pump
(D) Idler Pump
11
26
18
16
9
D
C
A
B
17
7
5
6
10
25
14
Description
Part
Number
Machine
Location
Schematic
Location
ACCUMULATOR - HYDRAULIC (PILOT OIL)
164-6981
1 B-6
CYLINDER GP - BOOM 2 G-3
CYLINDER GP - BUCKET 3 G-10
G-9CYLINDER GP - STICK 4
FILTER GP - OIL (HYDRAULIC RETURN) 188-4140
5
A-9
FILTER GP - OIL (PILOT) 158-8987
6
A-5
FILTER GP - OIL (CASE DRAIN) 126-2075
7
MANIFOLD GP - CONTROL (PILOT OIL) 215-5037 B-88
MOTOR GP - PISTON 234-4638 A-109
PUMP GP - PISTON (HYDRAULIC FAN) 259-0815 B-412
A-6
10MOTOR GP - SWING 200-3373
11
G-8
MOTOR GP - TRAVEL 271-6376
13
G-5, G-7
14
PUMP GP - PISTON (MAIN) 283-6116
234-4440
15
B-3
F-6SWIVEL GP
16
204-2819
17
F-5, F-7
VALVE GP - PILOT (TRAVEL) 270-5947
18
E-10
VALVE GP - SHUTTLE 185-0462
19
C-10
VALVE GP - CHECK (OIL COOLER BYPASS) 190-7745
20
B-10
VALVE GP - LOAD CONTROL
(STICK DRIFT RED, RELIEF LINE)
255-5680
21
E-7
VALVE GP - LOAD CONTROL
(BOOM DRIFT RED, RELIEF LINE)
255-5683
22
E-3
VALVE GP - MAIN CONTROL 285-1536
23
259-7732 B-624
VALVE GP - SWING CUSHION
VALVE GP - TRAVEL COUNTERBALANCE
158-9085 F-825
D-2
26
VALVE GP - PILOT CONTROL (LEFT JOYSTICK) 270-5951 D-10
VALVE GP - PILOT CONTROL (RIGHT JOYSTICK) 270-5952 D-9
VALVE GP - PRESSURE REDUCING (BOOM,
SWING PRIORITY)
232-4102 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 B-2
SOS Hydraulic Oil Sampling Port A-5
DD Idler Pump Pressure Test Port A-2
NOTE A
NOTE A
NOTE A
MOTOR GP - PISTON
242-6776
101 E-2
VALVE GP - CONTROL (REVERSE FAN) 102 D-2
VALVE GP - SOLENOID (REVERSING FAN) 103 E-1
REVERSE FAN ATTACHMENT
234-4624
242-6880
Note A: Refer to Parts Manual for your specific machine.
Note B: Available on NBD and MEY.
19
21
20
2
14
3
5
16
2611
1019
12
102
2611
2510
22
13
7
4
6
23
17 18
15
248 103
1
MOTOR GP - PISTON (TRAVEL) FILTER GP
MOTOR GP - SWING & SWIVELVALVE GP - MAIN CONTROL
PUMP GP - PISTON (MAIN)
SOS
AA
BB
CC
RENR9586-05
30 Page, (Dimensions: 39 inches x 28 inches)
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
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
BOOM CONTROL & BOOM CYLINDER CIRCUIT
LEFT TRAVEL CONTROL & LEFT TRAVEL MOTOR CIRCUIT
SWING CONTROL & SWING MOTOR CIRCUIT
THIS SCHEMATIC IS FOR THE 330D AND 336D EXCAVATOR
AND 336D MHPU / WITHOUT HEAVY LIFT AND FINE SWING
MEDIA NUMBER: RENR9586-06
PART NUMBER: 255-5865, 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
F
G
12345678910
12345678910
A
B
C
D
E
F
G
F
A
N
AL3 BL3
AR3 BR3
AR4 BR4
STICK CYLINDER
PUMP GP
PISTON (MAIN)
283-6116
R.C.V.: RETURN CHECK VALVE
*AVAILABLE ON NBD AND MEY
BUCKET CYLINDER
BOOM CYLINDER
PUMP GP
PISTON
(HYDRAULIC FAN)
259-0815
VALVE GP
SHUTTLE
259-7732
FILTER GP
OIL (PILOT)
158-8987
VALVE GP
PRESSURE REDUCING
(BOOM, SWING
PRIORITY)
232-4102
ACCUMULATOR GP
164-6981
FILTER GP
OIL
(CASE DRAIN)
126-2075
MANIFOLD GP
CONTROL (PILOT OIL)
215-5037
FILTER GP
OIL
(HYDRAULIC
RETURN)
188-4140
MOTOR GP
PISTON
234-4638
VALVE GP
CHECK (OIL
COOLER BYPASS)
190-7745
VALVE GP
LOAD CONTROL
(STICK)
255-5680
VALVE GP
LOAD CONTROL
(BOOM)
255-5683
VALVE GP
MAIN CONTROL
285-1536
VALVE GP
TRAVEL COUNTERBALANCE
204-2819
MOTOR GP
SWING
200-3373
MOTOR GP
TRAVEL
271-6376
VALVE GP
SWING CUSHION
158-9085
bR1 aR1
aL1 bL1
TRAVEL(L)
TRAVEL(R)
VALVE GP
PILOT (TRAVEL)
270-5947
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
185-0462
JRT
VALVE GP
PILOT CONTROL
(LEFT JOYSTICK)
270-5951
VALVE GP
PILOT CONTROL
(RIGHT JOYSTICK)
270-5952
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
PG PC
DRAIN
TRAVEL BRAKE
ABAB
AG
Pp3Pp3
T1
T2
T1
T2
BGBG
AG
TRAVEL MOTOR (LEFT) TRAVEL MOTOR (RIGHT)
MOTOR GP
TRAVEL
271-6376
VALVE GP
TRAVEL COUNTERBALANCE
204-2819
SWIVEL GP
234-4440
BL1 AL1
BR1
AR1
TRAVEL BRAKE
AL2
BL2
PG
DR
MU
BG
AG
B
A
SWING MOTOR
DR A1B1
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
A
C
T
I
V
A
T
I
O
N
H
Y
D
R
A
U
L
I
C
PAC
bL3
bL4
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
P
I
L
O
T
BOOM DRIFT REDUCTION
STICK DRIFT REDUCTION
PROPORTIONAL
REDUCING VALVE
MAIN
RELIEF
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 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)
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
VALVE GP
CONTROL
(REVERSE
FLOW)
234-4624
MOTOR GP
242-6776
VALVE GP
SOLENOID
(REVERSING
FAN)
242-6880
P
S
S
T
Pi
A
B
A
B
DR1DR L3 L2
R
E
V
E
R
S
E
F
A
N
