INTERACTIVE SCHEMATIC
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Information
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Tap Table
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Electrical Symbols
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X
EC-C3
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E-C60
EC-C1
E-C61
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©
2012 Caterpillar, All Rights Reserved
Printed in U.S.A.
UENR0435
May 2012
One-Way / One or Two Pump - Electric Control
349E Excavator
Hydraulic System - Attachment
DGE1-UP
TFG1-UP
KCN1-UP
MZW1-UP
KFX1-UP
MPZ1-UP
COMPONENT LOCATION
Description
Part
Number
Machine
Location
Schematic
Location
Accumulator Gp - Hydraulic (Charged) (Standard) 164-6981
Accumulator Gp - Hydraulic (Canada BC/AL Reg.) 352-6860
Control Gp - Joystick (LH) 335-0511 2
F-14
Control Gp - Joystick (RH) 335-0510 3 F-12
Cylinder Gp - Boom 358-8439 4 I-6
Cylinder Gp - Bucket 358-8482 5 I-5
Cylinder Gp - Stick 358-8461 6 I-4
Filter and Valve Gp - Pilot (Hydraulic Oil) 158-8987 7 C-2
Filter Gp - Oil (Hydraulic Return) 188-4145 8 A-3
Filter Gp - Oil (Hydraulic, Case Drain) 289-8194 9 B-3
Manifold Gp - Control (Pilot Oil Supply) 215-5037 B-6
Motor Gp - Swing (LH) 334-9975
11
I-8
Motor Gp - Swing (RH) 334-9975
12
I-9
Motor Gp - Travel (Left) 335-5669
13
I-14
Motor Gp - Travel (Right) 335-5669
14
I-12
Pump Gp - Piston (Main Hydraulic) 349-4066
15
C-8
Screen Gp - Hydraulic 326-4434
16
A-2
Sensor Gp - Pressure (Boom Down Ctrl) 338-6970
17
D-14
Sensor Gp - Pressure (Boom, Head End) 338-6971
18
H-6
Sensor Gp - Pressure (Boom Up Ctrl) 338-6970
19
D-13
Sensor Gp - Pressure (Negative Flow Control 1) 338-6970
20
B-10
Sensor Gp - Pressure (Negative Flow Control 2) 338-6970
21
A-10
Sensor Gp - Pressure (Overload Warning) 338-6971
22
D-5
Sensor Gp - Pressure (Overload Warning) 338-6971
23
D-5
Sensor Gp - Pressure (Stick In Ctrl) 338-6970
24
D-12
Sensor Gp - Pressure (Stick Out Ctrl) 338-6970
25
D-13
Sensor Gp - Pressure (Swing Control) 338-6970
26
D-12
Switch As - Pressure (Implement) 319-4407
27
D-13
Switch As - Pressure (Left Travel) 319-4407
28
D-11
Switch As - Pressure (Right Travel) 319-4407
29
D-10
Swivel Gp 225-4547
30
G-12
Tank and Filter Gp - Hydraulic 330-2497
31
A-3
Valve Gp - Boom Drift Reduction 352-7016
32
F-2
Valve Gp - Check 352-7071
33
G-8
Valve Gp - Check (Return) 323-7671
34
F-8
Valve Gp - Crossover Relief (Swing Cushion) 295-9422
35
H-9
Valve Gp - Pilot Travel (With Shuttle) 323-7762
36
E-10
Valve Gp - Pump Control 310-0107
37
B-10
Valve Gp - Shuttle 323-7560
38
E-12
Valve Gp - Pressure Reducing (Boom Priority) 148-6218
39
B-12
40
Valve Gp - Stick Drift Reduction 352-7016 F-7
Valve Gp - Travel Counterbalance (Left) 266-7843
41
H-14
Valve Gp - Travel Counterbalance (Right) 266-7843
42
43
H-11
Manifold Gp - Control and Solenoid (Heavy Lift) 323-7895
10
A-14, C-14
349E STANDARD
Accumulator Gp - Charged 230-0191 44
G-3
Filter Gp - Oil 247-8895 45 G-3
Valve Gp - Main Control (Standard) 310-0338
46
D-3
Valve Gp - Main Control (Heavy Lift) 323-7658
Valve Gp - Relief 239-9102 47
G-4
Valve Gp - Solenoid (Pressure Reducing) 259-7430 48 C-10
1 B-4
Attachment: One-way / One Or Two Pump - Electric Control
Manifold Gp - Control and Solenoid (Standard) 323-7894
TAP LOCATION
Tap
Number
Description
Schematic
Location
Do Pump Case Pressure C-9
a1 Drive Pump Delivery Pressure C-7
a3 Power Shift Pressure B-7
a2 Idler Pump Delivery Pressure B-7
A2 Drive Pump Negative Flow Pressure (NFC1) B-10
B2 Idler Pump Negative Flow Pressure (NFC2) B-10
PG Pilot Pump Delivery Pressure C-2
AA bR2, Attachment Extend Pilot Pressure (B1) C-10
BB bF1, Attachment Extend Pilot Pressure (B2) C-10
EE Boom Regeneration Valve Pressure A-14, B-14
SOS Oil Sampling Port C-2
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: ONE-WAY / ONE OR TWO PUMP - ELECTRIC CONTROL
SCHEMATIC PART NUMBER: 323-7833, CHANGE: 03, VERSION: HE
MEDIA NUMBER: UENR0435
THIS SCHEMATIC IS FOR THE 349E 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
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling, Sensor - by letter)
YY
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
SWING BRAKE CONTROL CIRCUIT
IDLER PUMP OUTPUT
POWERSHIFT CONTROL CIRCUIT
SUPPLY LINE
STICK CONTROL AND STICK CYLINDER CIRCUIT
LEFT TRAVEL CONTROL AND LEFT TRAVEL MOTOR CIRCUIT
ATTACHMENT CIRCUIT
SWING CONTROL AND SWING MOTOR CIRCUIT
DRAIN / RETURN LINE
DRIVE PUMP OUTPUT
TRAVEL SPEED CONTROL CIRCUIT
BUCKET CONTROL AND BUCKET CYLINDER CIRCUIT
RIGHT TRAVEL CONTROL AND RIGHT TRAVEL MOTOR CIRCUIT
BOOM CONTROL AND BOOM CYLINDER CIRCUIT
PILOT PUMP OUTPUT
Heavy Lift Options
bR5
2 SPEED
TRAVEL
CONTROL
(30) SWITCH AS
PRESSURE
(RIGHT TRAVEL)
319-4407
(37) VALVE GP
PILOT TRAVEL
(WITH SHUTTLE)
323-7762
(39) VALVE GP
SHUTTLE
323-7560
(15) MOTOR GP
TRAVEL (RIGHT)
355-5669
(42) VALVE GP
TRAVEL COUNTERBALANCE
(LEFT)
266-7843
(21) SENSOR GP
PRESSURE
(NEGATIVE FLOW CONTROL 1)
338-6970
(13) MOTOR GP
SWING (RH)
334-9975
(12) MOTOR GP
SWING (LH)
334-9975
(36) VALVE GP
CROSSOVER
RELIEF
(SWING CUSION)
295-9422
(2) CONTROL GP
JOYSTICK (LH)
335-0511
(14) MOTOR GP
TRAVEL (LEFT)
355-5669
(3) CONTROL GP
JOYSTICK (RH)
335-0510
(31) SWIVEL GP
225-4547
(17) SCREEN GP
HYDRAULIC
326-4434
(1) ACCUMULATOR GP
HYDRAULIC (CHARGED)
(STD) 164-6981
(CANADA BC/AL REG)
352-6860
319-4407
(10) MANIFOLD GP
CONTROL AND
SOLENOID (STD)
323-7894
(9) FILTER GP
OIL (HYDRAULIC,
CASE DRAIN)
289-8194
(7) FILTER AND VALVE GP
NOTE E: FOR USE AS TOOL-21 W/HAMMER RETURN FILTER
PILOT (HYDRAULIC OIL)
158-8987
(8) FILTER GP
OIL (HYDRAULIC RETURN)
188-4145
(32) TANK AND FILTER GP
HYDRAULIC
330-2497
(11) MANIFOLD GP
CONTROL
(PILOT OIL
SUPPLY)
215-5037
(16) PUMP GP
PISTON (MAIN HYDRAULIC)
349-4066
266-7843
(43) VALVE GP
TRAVEL
COUNTERBALANCE
(RIGHT)
EE
BB
AA
Do
a2
a3
A2
B2
PG
a1
(26) SENSOR GP
PRESSURE
(STICK OUT
CTRL)
338-6970
(28) SWITCH AS
PRESSURE
(IMPLEMENT)
PS
PRESS EPRV
TRAVEL MOTOR (LEFT)
TRAVEL MOTOR (RIGHT)
X
B
A
B
A
AG
AG
BG
BG
T2
T2
T1
T1
BR
BR
X
B
A
L
L
B
A
A
B
MU1
DB1
PG1
A1
B1
SWING MOTOR
AG1
BG1
DE1
A2
B2
MU2
PG2
DB2
DE2
AG2
BG2
SWING MOTOR
DRAIN
FILTER
(FWD)
(BKWD)
(FWD)(BKWD)
(R)
(L)
SWG
PRKG BK
CONTROL
2 SPEED
TRAVEL
CONTROL
MU
BOOM REGEN
REPRV
NFC2 LIMIT
EPRV
NFC1 LIMIT
EPRV
ATT
STEM 2
EXT EPRV
ATT
STEM 1
EXT EPRV
TRAVEL SPEED
CHANGE SOL
SWING BREAK
SOL
HYD LOCK
SOL
SWING PRIORITY
VALVE
(18) SENSOR GP
PRESSURE
(BOOM DOWN
CTRL)
338-6970
(20) SENSOR GP
PRESSURE
(BOOM UP CTRL)
338-6970
(25) SENSOR GP
PRESSURE
(STICK IN CTRL)
338-6970
(27) SENSOR GP
PRESSURE
(SWING CTRL)
338-6970
(29) SWITCH AS
PRESSURE
(LEFT TRAVEL)
319-4407
310-0107
(38) VALVE GP
PUMP CONTROL
(22) SENSOR GP
PRESSURE
(NEGATIVE FLOW
CONTROL 2)
338-6970
(19) SENSOR GP
PRESSURE
(BOOM, HEAD END)
338-6971
(4) BOOM CYLINDER
358-8439
(6) STICK CYLINDER
358-8461
(5) BUCKET CYLINDER
358-8482
STRAIGHT TRAVEL
SOL
(34) VALVE GP
CHECK
352-7071
(35) VALVE GP
CHECK
(RETURN)
352-7671
(41) VALVE GP
STICK DRIFT REDUCTION
352-7016
(33) VALVE GP
BOOM DRIFT REDUCTION
352-7016
(47) VALVE GP
RELIEF
239-9102
(45) FILTER GP
OIL
247-8895
NOTE E
SINGLE SINGLE
(44) ACCUMULATOR GP
CHARGED
230-0191
NOTE E
(46) VALVE GP
MAIN CONTROL
(STD) 310-0338
(HEAVY LIFT) 323-7658
(48) VALVE GP
SOLENOID
(PRESSURE
REDUCING)
259-7430
(40) VALVE GP
PRESSURE REDUCING
(BOOM PRIORITY)
148-6218
(23) SENSOR GP
PRESSURE
(OVERLOAD WARNING)
338-6971
(24) SENSOR GP
PRESSURE
(OVERLOAD WARNING)
338-6971
AL4
R.C.V-G
R.C.V-B
AUX
RETURN
AUX
RETURN
HR
bR4 bR5
AL2BL2 BR3 AR3
BPi
SDr
BDr
aR3
bR3
aL1
bL1
aL2
bL2
AL1
BL1
aR1
bR1
BR1
BR2
BF1 AF1 aF1
AR2
AR1
T
A
(STICK-IN)
(UP)
BOOM(2)
AL3
ST
ST
BL3
(IN)
(OUT)
STICK(1)
(R)
(L)
SWING
(FWD)
(BKWD)
TRAVEL(L)
STR-TRAVEL
(FWD)
(BKWD)
TRAVEL(R)
(EXT)
(RET)
ATCH
(OPEN)
BUCKET
(CLOSE)
(DOWN)
(UP)
BOOM(1)
AR4
BT
(IN)
STICK(2)
(OUT)
R1
SP2
BL3
bL3
aL3
bL4 SRPi
aR5
R.C.V-B
AR5BR5
AL4
AR5
SPi
aR4
BRPi
BR5
STPi
STDr
P2 P1
HL
aR2
bR2
SDr
SWDrSRDr BRDr2
dST
HEAVY LIFT
(10) MANIFOLD GP
CONTROL AND SOLENOID
(HEAVY LIFT - 323-7895)
PSA2
HPi
BRPi
B2
AL4
bF1
BP2
(EXT)
(RET)
BR4
P1
P2
bR2bF1
STPi
STDr
T
OUT
IN
A1 A2 A3 A4
A5 A6
A7
A8
B1 C1 B2
B3
C2
B4
C3
B5
B6 B7
C4
B8
BRPi
HL
HR
dST
SRDraR2
SOL1-T
SOL1-T
BRDr2
SOL1-T
PD-Pi
PD-Dr
PD-Pi PD-Dr
HL-Pi
PSA2
bL4
SWDr
BL1AL1 AR1 BR1
BP1
BT
BDr
BP3
SP1
SDr
B
C
D
E
F
G
HPi
P2S
HPi
P1S
BRDr1
A2 B2 A1 B1
P
T
Do
A4
A1
B1
P
P
T
A
P
A
B
T
A2
B2
S1
D1
Ps2
Pi2
Dr1
Ps1
A1
a1
a3
a2
A2
Psv
Pi1
bL3
SRPi
SPi
(OUT) (IN) (R)
(L)
(CLOSE)(OPEN)
(DOWN) (UP)
JL1
JL3
JL2
JL4
JR4
JR2
JR3
JR1
BPi
bR4
B2
aR5
aL4
aR3
bR3
aR4
bL2
aL2
aL3
1
1
2
2
3
3
4
4
5
5
6
6
TP
TT
TRAVEL (L)
TRAVEL (R)
(FWD)
(BKWD)
(FWD)
(BKWD)
T1
T5
T2
T4
T6
T3
bR1aR1aL1bL1
(EXT)
(EXT)
BDr
DRAIN
FILTER
R.C.V-G
MU
JLP
JLT
JRP
JRT
BOOM
BUCKET
STICK
SWING
AL2
BL2
P2
P1
PSA2
DR1
PSA1
DR2
T-OUT2
Pi1
P-IN
DR6
T-OUT1
DR5Pi2
DR4
DR3
SWG
PRKG BK
CONTROL
BR3
AR3
BR4
BP2
SP2BL3
SOS
EE
P1
P2
A1
A2
T
BOOM REGEN
REPRV
HEAVY LIFT
SOLENOID
MAIN CONTROL VALVE
EE
46
41
40
35
34
33
26
25
11
10
1
VIEW ALL CALLOUTS
MAIN PUMP AND CONTROL VALVE
SOS
PG
B2
A2
a2
a3
a1
Do
38
22
21
7
VIEW ALL CALLOUTS
TOP VIEW - CAB
39
37
30
29
28
27
20
18
3
2
VIEW ALL CALLOUTS

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