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CAT 349E Excavator Hydraulic System Attachment Smart Boom for

INTERACTIVE SCHEMATIC
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EC-C3
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©
2012 Caterpillar, All Rights Reserved
Printed in U.S.A.
UENR3656
July 2012
349E Excavator
Hydraulic System - Attachment
MZW1-UP
KFX1-UP
Smart Boom for One-Way / One or Two Pump - Electric Control
COMPONENT LOCATION
Description
Part
Number
Machine
Location
Schematic
Location
349E STANDARD
Accumulator Gp - Hydraulic (Charged) (Standard) 164-6981
Accumulator Gp - Hydraulic (Canada BC/AL Reg.) 352-6860
Block Gp 323-7650 2
F-2
Control Gp - Joystick (LH) 335-0511 3 F-14
Control Gp - Joystick (RH) 335-0510 4 F-12
Cylinder Gp - Boom 358-8439 5 J-3
Cylinder Gp - Bucket 358-8482 6 I-7
Cylinder Gp - Stick 358-8461 7 I-6
Filter and Valve Gp - Pilot (Hydraulic Oil) 158-8987 8 C-2
Filter Gp - Oil (Hydraulic Return) 188-4145 9 A-3
Filter Gp - Oil (Hydraulic, Case Drain) 289-8194 10 B-3
Manifold and Solenoid Gp - Control (Heavy Lift) 323-7895 11 B-14
Manifold Gp - Control (Pilot Oil Supply) 215-5037 12 B-6
Motor Gp - Swing (LH) 334-9975 13 H-8
Motor Gp - Swing (RH) 334-9975 14 I-9
Motor Gp - Travel (Left) 335-5669 15 I-14
Motor Gp - Travel (Right) 335-5669 16 I-12
1 B-4
Pump Gp - Piston (Main Hydraulic) 349-4066 17 C-8
Screen Gp - Hydraulic 326-4434 18 A-2
Sensor Gp - Pressure (Boom Down Ctrl) 338-6970 19 D-14
Sensor Gp - Pressure (Boom, Rod End) 338-6971 20 J-4
Sensor Gp - Pressure (Boom Up Ctrl) 338-6970 21 D-13
Sensor Gp - Pressure (Negative Flow Control 1) 338-6970 22 B-10
Sensor Gp - Pressure (Negative Flow Control 2) 338-6970 23 A-10
Sensor Gp - Pressure (Overload Warning) 338-6971 24 D-5
Sensor Gp - Pressure (Overload Warning) 338-6971 25 D-5
Sensor Gp - Pressure (Stick In Ctrl) 338-6970 26 D-12
Sensor Gp - Pressure (Stick Out Ctrl) 338-6970 27 D-13
Sensor Gp - Pressure (Swing Control) 338-6970 28 D-12
Switch As - Pressure (Implement) 319-4407 29 D-13
Switch As - Pressure (Left Travel) 319-4407 30 D-11
Switch As - Pressure (Right Travel) 319-4407 31 D-10
Swivel Gp 225-4547 32 G-12
Tank and Filter Gp -Hydraulic 330-2497 33 A-3
Valve Gp - Check 352-7071 34 F-8
Valve Gp - Check (Return) 323-7671 35 F-8
Valve Gp - Crossover Relief (Swing Cushion) 295-9422 36 H-10
Valve Gp - Pilot Travel (With Shuttle) 323-7762 37 E-10
Valve Gp - Pressure Reducing (Boom Priority) 148-6218 38 B-12
Valve Gp - Pump Control 310-0107 39 B-10
Valve Gp - Shuttle 323-7560 40 E-12
Valve Gp - Solenoid and Pressure Red. (Boom Lowering Ctrl) 323-7894 55 C-14
Valve Gp - Stick Drift Reduction 352-7016 41 F-7
Valve Gp - Travel Counterbalance (Left) 266-7843 42 H-14
Valve Gp - Travel Counterbalance (Right) 266-7843 43 H-11
Attachment: Smart Boom for One-way / One Or Two Pump - Electric Control
Accumulator Gp - Charged 230-0191 44
G-3
Filter Gp - Oil 247-8895 45 G-3
Plate 259-7504 46 H-3
Sensor Gp - Pressure (Boom Head End) 338-6971 47 I-4
Valve Gp - Check (Boom Float Up) 297-0371 48 H-3
Valve Gp - Load Ctrl (Boom Cylinder. LH) 352-7143 49 I-4
Valve Gp - Load Ctrl (Boom Cylinder. RH) 352-7143 50 I-3
Valve Gp - Main Control (Heavy Lift) 323-7658 51 D-3
Valve Gp - Manual (Boom Lower) 335-0512 52 I-4
Valve Gp - Relief (Work Tool) 239-9102 53 F-4
Valve Gp - Solenoid (Pressure Reducing) 259-7430 54 C-10
Check Part Numbers in the Parts Manuals for your Specific Machine
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
CC Boom Pilot Pressure B-14
DD Boom Regeneration Valve Pressure A-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: SMART BOOM FOR ONE-WAY / ONE OR TWO PUMP - ELECTRIC CONTROL
SCHEMATIC PART NUMBER: 349-2060, CHANGE: 00, VERSION: HE
MEDIA NUMBER: UENR3656
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
bR5
2 SPEED
TRAVEL
CONTROL
(31) SWITCH AS
PRESSURE
(RIGHT TRAVEL)
319-4407
(30) SWITCH AS
PRESSURE
(LEFT TRAVEL)
319-4407
(37) VALVE GP
PILOT TRAVEL (WITH SHUTTLE)
323-7762
(40) VALVE GP
SHUTTLE
323-7560
(16) MOTOR GP
TRAVEL (RIGHT)
355-5669
(42) VALVE GP
TRAVEL COUNTERBALANCE
(LEFT)
266-7843
(22) SENSOR GP
PRESSURE
(NEGATIVE FLOW CONTROL 1)
338-6970
(23) SENSOR GP
PRESSURE
(NEGATIVE FLOW CONTROL 2)
338-6970
(14) MOTOR GP
SWING (RH)
334-9975
(13) MOTOR GP
SWING (LH)
334-9975
(36) VALVE GP
CROSSOVER REFLIEF
(SWING CUSHION)
295-9422
(3) CONTROL GP
JOYSTICK
335-0511
(15) MOTOR GP
TRAVEL (LEFT)
355-5669
(4) CONTROL GP
JOYSTICK (RH)
335-0510
(32) SWIVEL GP
225-4547
(18) SCREEN GP
HYDRAULIC
326-4434
(1) ACCUMULATOR GP
HYDRAULIC (CHARGED)
164-6981 (STD)
352-6860 (CANADA BC/AL REG)
(55) VALVE GP
SOLENOID AND
PRESSURE REDUCING
(BOOM LOWERING CTRL)
323-7894
(10) FILTER GP
OIL (HYDRAULIC,
CASE DRAIN)
289-8194
(8) FILTER AND VALVE GP
PILOT (HYDRAULIC OIL)
158-8987
NOTE E: FOR USE AS TOOL-21 W/HAMMER RETURN FILTER
(9) FILTER GP
OIL (HYDRAULIC RETURN)
188-4145
(33) TANK AND
FILTER GP
HYDRAULIC
330-2497
(12) MANIFOLD GP
CONTROL
(PILOT OIL SUPPLY)
215-5037
(17) PUMP GP
PISTON
(MAIN HYDRAULIC)
349-4066
266-7843
(43) VALVE GP
TRAVEL COUNTERBALANCE
(RIGHT)
CC
BB
AA
Do
a2
a3
A2
B2
PG
a1
(27) SENSOR GP
PRESSURE
(STICK OUT CTRL)
338-6970
(29) SWITCH AS
PRESSURE
(IMPLEMENT)
319-4407
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 DOWN
REPRV (S1)
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
(19) SENSOR GP
PRESSURE
(BOOM DOWN CTRL)
338-6970
(21) SENSOR GP
PRESSURE
(BOOM UP CTRL)
338-6970
(26) SENSOR GP
PRESSURE
(STICK IN CTRL)
338-6970
(28) SENSOR GP
PRESSURE
(SWING CTRL)
338-6970
(39) VALVE GP
PUMP CONTROL
310-0107
(7) CYLINDER GP
STICK
358-8461
(6) CYLINDER GP
BUCKET
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
(2) BLOCK GP
323-7650
(53) VALVE GP
RELIEF
(WORK TOOL)
239-9102
(45) FILTER GP
OIL
247-8895
NOTE E
SINGLE SINGLE
(44) ACCUMULATOR GP
CHARGED
230-0191
NOTE E
(51) VALVE GP
MAIN CONTROL
(HEAVY LIFT)
323-7658
(54) VALVE GP
SOLENOID
(PRESSURE REDUCING)
259-7430
(38) VALVE GP
PRESSURE REDUCING
(BOOM PRIORITY)
148-6218
(25) 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
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
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
HPi
HL-Pi
HPi
BRPi
aL4
bF1
(EXT)
(RET)
BR4
P1
P2
bR2bF1
STPi
STDr
SOL6-T
T
OUT
IN
A1 A2 A3 A4
A5
A6
A7
A8
B1 C1 B2
B3
C2
B4
C3
B5
B6 B7
C4
B8
bR4
HL
HR
dST
SRDraR2
SOL6-T
SOL1-T
BRDr2
SOL1-T
PD-Pi
PD-Dr
PD-Pi PD-Dr
HL-Pi
bL4
SWDr
BL1AL1 AR1 BR1
BP1
BT
BP3
SP1
SDr
B
C
D
E
F
G
HPi
P2S
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
BLCV-Pi
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
T6T3
bR1aR1aL1bL1
(EXT)
(EXT)
BLCV-Dr
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
PAC
T-OUT1
DR5Pi2
DR4
DR3
SWG
PRKG BK
CONTROL
BR3
AR3
SP2BL3
SOS
DD
P1
P2
A1
A2
T
(11) MANIFOLD AND
SOLENOID GP
CONTROL
(HEAVY LIFT)
323-7895
BOOM REGEN
REPRV
HEAVY LIFT
SOLENOID
(20) SENSOR GP
PRESSURE
(BOOM, ROD END)
338-6971
(47) SENSOR GP
PRESSURE
(BOOM,
HEAD END)
338-6971
(50) VALVE GP
LOAD CONTROL
(BOOM CYLINDER RH)
352-7143
(49) VALVE GP
LOAD CTRL
(BOOM CYLINDER LH)
352-7143
(52) VALVE GP
MANUAL
(BOOM LOWER)
335-0512
(46) PLATE
259-7504
(48) VALVE GP
CHECK
(BOOM FLOAT UP)
297-0371
(5) CYLINDER GP
BOOM
358-8439
A
B
Dr
A
B
Dr
BOOM DOWN ELE
CHECK SOL (EC2)
BOOM UP ELE
CHECK SOL (EC2)
BR4
CYL
X
Dr
CV
Pi
T
X
T
Pi
CV
Dr
X
CYL
X
BLCV-Dr
BLCV-Pi
MAIN CONTROL VALVE
DD
CC
55
51
41
38
35
34
26
12
11
2
1
VIEW ALL CALLOUTS
MAIN PUMP AND CONTROL VALVE
SOS
PG
B2
A2
a2
a3
a1
Do
39
23
22
8
VIEW ALL CALLOUTS
TOP VIEW - CAB
40
37
31
30
29
28
21
19
4
3
VIEW ALL CALLOUTS

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