INTERACTIVE SCHEMATIC
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©
2012 Caterpillar, All Rights Reserved
Printed in U.S.A.
UENR0410
February 2012
Alternate Pattern Control - Two-Way
336E Excavator
Hydraulic System - Attachment
YEP1-UP
BZY1-UP
COMPONENT LOCATION
Description
Part
Number
Machine
Location
Schematic
Location
Accumulator Gp - Hydraulic (Charged) 164-6981 1 E-6
Control Gp - Joystick (LH) 323-7948 2 I-3
Control Gp - Joystick (RH) 323-7947 3 I-1
Cylinder Gp - Boom 358-5972 4 J-9
Cylinder Gp - Bucket 357-9766 5 J-10
Cylinder Gp - Stick 357-4703 6 J-11
Filter and Valve Gp - Pilot (Hydraulic Oil) 158-8987 7 B-6
Filter Gp - Oil (Hydraulic Return) 188-4145 8 A-7
Filter Gp - Oil (Hydraulic, Case Drain) 289-8194 9 A-6
Manifold Gp - Control (Pilot Oil Supply) 215-5037 10 E-7
Motor Gp - Swing 334-9973 11 J-7
Motor Gp - Travel (Left) 271-6376 12 J-6
Motor Gp - Travel (Right) 271-6376 13 J-4
Pump Gp - Piston (Main Hydraulic) 349-4065 14 C-5
Screen Gp - Hydraulic 326-4408 15 A-7
Sensor Gp - Pressure (Boom Down Ctrl) 338-6970 16 F-3
Sensor Gp - Pressure (Boom, Head End) 338-6971 17 I-9
Sensor Gp - Pressure (Negative Flow Control) 338-6970 18 C-2
Sensor Gp - Pressure (Negative Flow Control) 338-6970 19 D-2
Sensor Gp - Pressure (Overload Warning) 338-6971 20 A-12
Sensor Gp - Pressure (Overload Warning) 338-6971 21 A-11
Sensor Gp - Pressure (Swing Control) 338-6970 22 F-1
Switch As - Pressure (Implement) 319-4407 23 F-2
Switch As - Pressure (Left Travel) 319-4407 24 F-4
Switch As - Pressure (Right Travel) 319-4407 25 F-5
Swivel Gp 234-4440 26 I-5
Tank and Filter Gp - Hydraulic 319-9805 27 A-7
Valve Gp - Boom Drift Reduction 323-7610 28 B-14
Valve Gp - Check 323-7502 29 F-10
Valve Gp - Main Control 335-0384 30 F-12
Valve Gp - Pilot Travel (With Shuttle) 323-7762 31 G-4
Valve Gp - Pressure Reducing 285-1613 32 E-2
Valve Gp - Pump Control 310-0107 33 C-3
Valve Gp - Solenoid (Pressure Reducing) 323-7894 34 E-3
Valve Gp - Shuttle 323-7560 35 G-1
Valve Gp - Stick Drift Reduction 335-0200 36 E-9
Valve Gp - Travel Counterbalance (Left) 322-8714 38 I-6
Valve Gp - Travel Counterbalance (Right) 322-8714 39 I-4
Valve Gp - Selector (Two Way) 335-0545 40 H-2
Valve Gp - Swing Cushion 158-9085 37 I-7
336E STANDARD
Attachment: Alternate Pattern Control - Two-way
TAP LOCATION
Tap
Number
Description
Schematic
Location
Do C-5
a1 B-4
a3 B-4
a2 B-3
A2 C-2
B2 C-2
PG B-6
PC B-6
EE
D-3
Pump Case Pressure
Drive Pump Delivery Pressure
Power Shift Pressure
Idler Pump Delivery Pressure
Drive Pump Negative Flow Pressure (NFC1)
Idler Pump Negative Flow Pressure (NFC2)
Pilot Pump Delivery Pressure
Oil Sampling Port
Boom Regeneration Valve Pressure
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
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
Components are shown installed on a fully operable machine with the key and engine off, transmission shifter
in neutral and with parking brake set.
Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
ATTACHMENT: ALTERNATE PATTERN CONTROL - TWO-WAY
SCHEMATIC PART NUMBER: 323-7535, CHANGE: 03, VERSION: HE
MEDIA NUMBER: UENR0410
THIS SCHEMATIC IS FOR THE 336E EXCAVATOR HYDRAULIC SYSTEM
A
B
C
D
E
F
12345678
91011121314
G
H
I
J
12345678
91011121314
A
B
C
D
E
F
G
H
I
J
DRAIN / RETURN LINE
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
IDLER PUMP OUTPUT
DRIVE PUMP OUTPUT
POWERSHIFT CONTROL CIRCUIT
PILOT PUMP OUTPUT
SUPPLY LINE
BUCKET CONTROL AND BUCKET CYLINDER CIRCUIT
RIGHT TRAVEL CONTROL AND RIGHT TRAVEL MOTOR CIRCUIT
TRAVEL SPEED CONTROL CIRCUIT
STICK CONTROL AND STICK CYLINDER CIRCUIT
BOOM CONTROL AND BOOM CYLINDER CIRCUIT
LEFT TRAVEL CONTROL AND LEFT TRAVEL MOTOR CIRCUIT
FINE SWING CONTROL AND SWING MOTOR CIRCUIT
SWING BRAKE CONTROL CIRCUIT
SHUTTLE VALVE CONTROL CIRCUIT
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling, Sensor - by letter)
YY
(37) VALVE GP
SWING CUSHION
(FINE SWING)
322-8716
(10) MANIFOLD GP
CONTROL
(PILOT OIL SUPPLY)
215-5037
(38) VALVE GP
TRAVEL
COUNTERBALANCE
(LEFT)
322-8714
a1
STRAIGHT
TRAVEL SOL
DR6
T-OUT1
DR5
Pi2
DR4
DR3
P2
P-IN
PSA2
DR1
PSA1
DR2
T-OUT2
Pi1
PAC
HYD LOCK
SOL
T
OUT
PG
PC
IN
ST
SP1
SWG
PRKG BK
CONTROL
2 SPEED
TRAVEL
CONTROL
P1
335-0384
MU
T
B2
B1
A2
A1
P
Ps2
Di
Ps1
S1
Dr1
Psv
a1
a3
a2
A1
A2
A4
Do
Pi1
Pi2
PUMP-S1 PUMP-S2
A
C
B
DRAIN
FILTER
R.C.V-D
pR5f
L2
L1
R3
pR3b
pL2b
pL3f
pL5b
pL3b
pL4b
L5
L4
pL5f
pR1f
R5
R4
L6
pR6f
pR2b
pSR
R1
R2
SP2
SPi
pR3f
pR4b
BP2
pST
dST
P1
P2
pL6f
SDr
pL1f
pR5b
dR1b
T
R6
ST6
(IN)
STICK(2)
(OUT)
(CLOSE)
(OPEN)
(OUT)
BUCKET
STICK(1)
(IN)
(R)
(L)
(UP)
SWING
(UP)
BT3
L3
BOOM(1)
BOOM(2)
(DOWN)
(FWD)
TRAVEL(R)
(BKWD)
(FWD)
TRAVEL(L)
STR-TRAVEL
(BKWD)
R.C.V-D
dST
SDr
MF-P
DrR
MF-TANK
SOL1-T
PRV-T
MF-TANK
NFC-T
PD-Dr
PD-Pi
NFC-Pi
MF-PpST
DrR
dR1b
pBR
NFC1 NFC2
NFC2
NFC1
NFC-Pi
NFC-T
P2
P1
MU
DR
PG
SWING MOTOR
SWG
PRKG BK
CONTROL
(L)
(R)
DR
A
B
A1
B1
AG
BG
(6) STICK CYLINDER
(5) BUCKET CYLINDER
MU
TRAVEL MOTOR (LEFT)
TRAVEL MOTOR (RIGHT)
Pp3
B
A
B
A
AG
AG
BG
BG
T2
T2
T1
T1
Pp3
(FWD)
(FWD)
(BKWD)
(BKWD)
2 SPEED
TRAVEL
CONTROL
DRAIN
FILTER
(4) BOOM CYLINDER
R4L4
L5
L6
R5
SP2
R1L1 L2 R2
BP2
R3
Do
PG
a3
a2
A2
B2
357-4703
357-9766
358-5972
(30) VALVE GP
MAIN CONTROL
(20) SENSOR GP
PRESSURE
(OVERLOAD WARNING)
338-6971
(21) SENSOR GP
PRESSURE
(OVERLOAD WARNING)
338-6971
SWING
PRIORITY SOL
(29) VALVE GP
CHECK
323-7502
(17) SENSOR GP
PRESSURE
(BOOM, HEAD END)
338-6971
(27) TANK AND FILTER GP
HYDRAULIC
319-9805
(8) FILTER GP
OIL (HYDRAULIC
RETURN)
188-4145
(15) SCREEN GP
HYDRAULIC
326-4408
(11) MOTOR GP
SWING
334-9973
(12) MOTOR GP
TRAVEL (LEFT)
271-6376
SWING BREAK
SOL
TRAVEL SPEED
CHANGE SOL
(7) FILTER AND
VALVE GP
PILOT
(HYDRAULIC OIL)
158-8987
(9) FILTER GP
OIL (HYDRAULIC,
CASE DRAIN)
289-8194
(14) PUMP GP
PISTON
(MAIN HYDRAULIC)
349-4065
(26) SWIVEL GP
234-4440
(13) MOTOR GP
TRAVEL (RIGHT)
271-6376
322-8714
(39) VALVE GP
TRAVEL COUNTERBALANCE
(RIGHT)
(1) ACCUMULATOR GP
HYDRAULIC (CHARGED)
164-6981
PS
PRESS EPRV
NFC 2
LIMIT EPRV
NFC 1
LIMIT EPRV
310-0107
(33) VALVE GP
PUMP CONTROL
(19) SENSOR GP
PRESSURE
(NEGATIVE FLOW CONTROL)
338-6970
(18) SENSOR GP
PRESSURE
(NEGATIVE FLOW CONTROL)
338-6970
(28) VALVE GP
BOOM DRIFT
REDUCTION
323-7610
(36) VALVE GP
STICK DRIFT
REDUCTION
335-0200
BDr
BPi
SWG
MOTOR
DRAIN
SWG
MOTOR
DRAIN
PC
BDr
E
BT
BP1
FINE SWING
SOL
(31) VALVE GP
PILOT TRAVEL (WITH SHUTTLE)
323-7762
6
TP
TT
TRAVEL(L)
TRAVEL(R)
(FWD)
(BKWD)
(FWD)
(BKWD)
T1
T5
T2
T4
T6
T3
(OUT) (IN) (R)
(L)
(CLOSE)(OPEN)
(DOWN) (UP)
JLP
JLT
JRP
JRT
BOOM
BUCKET
STICK
SWING
JL1 JL3 JL2 JL4 JR4
JR2 JR3JR1
1
1
2
2
3
3
4
4
5
5
6
P
P
A
B
T
T
A
BPi
pR5b
pL6f
pL3b
pL5f
pR5f
pL3f
pL4b
pR4b
pSR
pR6f
SPi
pR2bpL2bpL1fpR1f
pL5b
PD-Pi
PD-Dr
A1 A2 A3 A4 A5 A6 A7 A8
B1 C1 B2 B3
C2
B4
C3 B5 B6 B7 C4 B8
PRV-T
pBR
SOL1-T
BOOM REGEN
REPRV
(32) VALVE GP
PRESSURE REDUCING
285-1613
(2) CONTROL GP
JOYSTICK (LH)
323-7948
EE
(16) SENSOR GP
PRESSURE
(BOOM DOWN CTRL)
338-6970
(24) SWITCH AS
PRESSURE
(LEFT TRAVEL)
319-4407
(23) SWITCH AS
PRESSURE
(IMPLEMENT)
319-4407
(22) SENSOR GP
PRESSURE
(SWING CONTROL)
338-6970
(35) VALVE GP
SHUTTLE
323-7560
(3) CONTROL GP
JOYSTICK (RH)
323-7947
(25) SWITCH AS
PRESSURE
(RIGHT TRAVEL)
319-4407
(34) VALVE GP
SOLENOID
(PRESSURE REDUCING)
323-7894
pR3f
pR3b
(40) VALVE GP
SELECTOR
(TWO-WAY)
335-0545
PATTERN-1
SAE (JIS)
PATTERN-2
BHL
D1
C1
B1
A1
D4
C3
B2
A2
MACHINE COMPONENT LOCATIONS
R
L
LEFT TRAVEL MOTOR
View B-B
View A-A
Left Side Front
Right Side Bottom Up
View C-C
TANK
RIGHT TRAVEL MOTOR
38
37
27
26
15
13
12
10
8
1
VIEW ALL CALLOUTS
BOOM LOWERING CONTROL VALVE
17
4
VIEW ALL CALLOUTS
BUCKET CYLINDER
5
RIGHT SIDE ACCESS PANEL
FRONT
PC
PG
B2 A2
a2
a3a1
Do
33
19
18
14
9
7
VIEW ALL CALLOUTS
STICK CYLINDER
6
TOP DOWN VIEW - CAB
FRONT
35
3125
24
23 22
16
3
2
VIEW ALL CALLOUTS
TOP DOWN VIEW - MACHINE CENTER
FRONT
EE
39
36
34
32
30
29
28
21 20
11
VIEW ALL CALLOUTS
ALTERNATE PATTERN CONTROL - TWO WAY
OPERATOR
PLATFORM
40
