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CAT 345C ExcavatorHydraulic System Attachment Boom Lowering Control Valve

INTERACTIVE SCHEMATIC
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©
2009 Caterpillar, All Rights Reserved
Printed in U.S.A.
RENR7128-03
January 2009
Boom Lowering Control Valve
345C Excavator
Hydraulic System - Attachment
TBA1-UP
ESD1-UP
WDE1-UP
TDG1-UP
TAJ1-UP
S5M1-UP
DHP1-UP
GJR1-UP
PJW1-UP
BWY1-UP
COMPONENT LOCATION
Note A: Refer to parts manual for specific cylinder information.
Description
Part
Number
Machine
Location
Schematic
Location
Valve Gp - Main Control 259-7777 1 C-1
Valve Gp - Manual Boom Lower 259-7505 2 E-2
Valve Gp - Load Control 263-1964 3 F-3
Accumulator Gp - Pilot Manifold 164-6981 19 A-4
Cylinder Gp - Boom Note A 21 F-2
Cylinder Gp - Bucket Note A 22 F-8
Cylinder Gp - Stick Note A 23 E-8
Filter Gp - Return 173-3434 24 A-6
Filter Gp - Pilot 158-8987 25 A-4
Filter Gp - Return Oil 126-2075 26 A-5
Motor Gp - Cooling Fan 242-6904 27 A-7
Motor Gp - Left Travel 232-6180 28 F-5
Motor Gp - Right Swing 225-4506 29 F-6
Motor Gp - Right Travel 232-6180 30 F-4
Motor Gp - Swing Left 225-4506 31 F-7
Pump Gp - Cooling Fan 259-0814 32 B-2
Pump Gp - Drive / Idler / Pilot Hydraulic 259-0818 33 B-3
Swivel Gp 225-4547 34 E-4
Tank Gp - Hydraulic Oil 227-0431 35 A-6
Valve Gp - Boom/Swing Priority 232-4102 36 B-4
Valve Gp - Cooler Bypass Check 123-2505 37 A-7
Valve Gp - Left Swing Motor 116-3420 38 E-7
Valve Gp - Left Travel / Brake 165-9338 39 E-5
Valve Gp - LH Pilot Control (Stick/Swing) 232-4157 40 C-7
Valve Gp - Pilot Manifold 215-5037 42 B-5
Valve Gp - Pilot Travel 165-9522 43 D-7
Valve Gp - RH Pilot Control (Bucket/ Boom) 232-4158 44 C-7
Valve Gp - Right Travel / Brake 165-9338 45 E-4
Valve Gp - Slow Return Check 185-0384 46 B-7
Attachment: Boom Lower Control Valve
Standard 345C
TAP LOCATION
Tap
Number
Description
Schematic
Location
AA Pilot Pump Delivery Pressure A-4
BB Drive Pump Delivery Pressure B-2
CC Pump Power Shift Pressure A-2
DD Idler Pump Delivery Pressure A-2
SOS Hydraulic Oil Sampling Port A-4
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
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling, Sensor - by letter)
YY
DRAIN / RETURN LINE
DRIVE PUMP OUTPUT
IDLER PUMP
POWER SHIFT CONTROL CIRCUIT
PILOT PUMP OUTPUT
COOLING FAN PUMP
ATTACHMENT CONTROL CIRCUIT
SUPPLY LINE
BUCKET CONTROL & BUCKET CYLINDER CIRCUIT
RIGHT TRAVEL CONTROL & RIGHT TRAVEL MOTOR CIRCUIT
TRAVEL SPEED CONTROL CIRCUIT
STICK CONTROL & STICK CYLINDER CIRCUIT
BOOM CONTROL & BOOM CYLINDER CIRCUIT
HEAVY LIFT CONTROL CIRCUIT
LEFT TRAVEL CONTROL & LEFT TRAVEL MOTOR CIRCUIT
SWING CONTROL & SWING MOTOR CIRCUIT
SWING BRAKE CONTROL CIRCUIT
LINES GROUP COLOR DESCRIPTIONS
THIS SCHEMATIC IS FOR THE 345C EXCAVATOR
ATTACHMENT: BOOM LOWERING CONTROL VALVE
MEDIA NUMBER: RENR7128-03
PART NUMBER: 230-2711, CHANGE: 00, VERSION: HE
Components are shown installed on a fully operable machine.
Refer to the appropriate Service Manual for Troubleshooting, Specifications.
12345678
A
B
C
D
E
F
12345678
A
B
C
D
E
F
Pi1
PS1D0
B
S
A4
B1
Dr1
Di
PS2
PB
Pi2
a5
A2
a3
PSV
A1
a1
a4
L1
L
X
PR
PL
a2
DR
DR1
L2
L3
A
B
B1
A1
A2
B2
P1
P2
A
T P
8
1
7
6 5
T
P1
P2 Pi1 P-IN PSA2 DR1 PSA1
T-OUT2
DR2
DR3 DR4 Pi2 DR5 DR6T-OUT1
OUT
T
PG
PC
IN
NO.1
(TRAVEL)
NO.2
(SWING)
NO.3
(LOCK)
STICK
SWING
BUCKET
BOOM
OUT
IN
L
R
OPEN CLOSE DOWN
UP
JLP
JLT
JRP
JRT
JR1
JR3
JR2
JR4
JL4JL2
JL3
JL1
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
A8
B8
aR3 bR3bR2 aR2aL3bL3 bL4aR4
µµµ µµµµ µ
(23) CYLINDER GP
STICK
DB1
M1
PA1
A
B
PG1
DB2
M2
PA2
A1
B1
DE1
PB1
PG2
PB2
A2
B2
DE2
TRAVEL(L) TRAVEL(R)
X
AG
BR
T1
L
A B
BG
(22) CYLINDER GP
BUCKET
TP
TT
BACK
T1 T2
FWD
FWD
T3 T4
BACK
bR1 aR1 aL1 bL1
BR3 AR3
AR2 BR2
BL3 AL3
T2
BR
T1
T2
L
BG
AG
X
A
B
Dr
CYL
Pi
TCV
(3) VALVE GP
263-1964
(2) VALVE GP
259-7505
(21) CYLINDER GP
BOOM
Dr
X
CYL
Pi
T
CV
BR1 AR1 AL1 BL1
BL4
µµµ µ
X
(1) VALVE GP
259-7777
aL5
Dr
HL
R2
X
dL5 (IN)(DOWN)(OPEN)
aL4AL2
STICK(2)BOOMBUCKET
AL4
bL3
BL3
AL3
aL3 bL4
BL4
(OUT)
bL2(FWD)
Pp1
PSW
PTA
(BACK)
(B) (F) PAT BL2aL2
(CLOSE) (UP)
ATCHTRAVEL(R)
Pp2
bL1
BL1
AL1
aL1
dST1(FWD)(L)dSWPiL(IN)dR5APi2dR4
R1
Y
AR4
R3
HR
(UP) ADr
APi
(OUT)
(R) (L)
(R)
(F)(B)
(BACK)
TRAVEL(L)SWINGSTICKBOOM(2)
BR3 AR3
aR3
BR2
AR2
BR1
AR1
bR2
bR1
bR3
aR2 aR1
PL
PR
aR4
PiH
(27) MOTOR GP
COOLING FAN
242-6904
(46) VALVE GP
CHECK
185-0384
SLOW RETURN
(37) VALVE GP
COOLER
BYPASS
123-2505
(24) FILTER GP
RETURN
173-3434
(35) TANK GP
HYDRAULIC OIL
227-0431
(26) FILTER GP
RETURN OIL
126-2075
(42) VALVE GP
PILOT
MANIFOLD
215-5037
(19) ACCUMULATOR GP
PILOT MANIFOLD
164-6981
FILTER GP
CASE DRAIN
(36) VALVE GP
BOOM/SWING
PRIORITY
232-4102
(25) FILTER GP
PILOT
(32) PUMP GP
COOLING FAN
259-0814
VALVE GP
POWER SHIFT
CONTROL
(33) PUMP GP
DRIVE/IDLER/
PILOT
HYDRAULIC
259-0818
(31) MOTOR GP
LEFT SWING
225-4506
(38) VALVE GP
LEFT SWING MOTOR
116-3420
(29) MOTOR GP
RIGHT SWING
225-4506
(40) VALVE GP
LH PILOT CONTROL
STICK/SWING
232-4157
(44) VALVE GP
RH PILOT
CONTROL
BUCKET/BOOM
232-4158
(43) VALVE GP
PILOT CONTROL
TRAVEL
165-9522
(30) MOTOR GP
RIGHT TRAVEL
232-6180
(45) VALVE GP
RIGHT
TRAVEL/BRAKE
165-9338
(34) SWIVEL GP
225-4547
(28) MOTOR GP
LEFT TRAVEL
232-6180
(39) VALVE GP
LEFT
TRAVEL/BRAKE
165-9338
LOAD CONTROL
MANUAL BOOM LOWER
MAIN CONTROL
AA
SOS
DD
CC
BB
(3) VALVE GP
263-1964
LOAD CONTROL
158-8987
MAIN CONTROL VALVE
AL4
BL4 AL3 AL2 AL1 AR1
BL3 BL2 BL1
PTA
PSW
X
BR2
AR4
AR3
BR3
BR1
AR2
STICK (2)
BOOM(1)
BUCKET
ATCH
TRAVEL (R) STR TRAVEL
TRAVEL (L)
SWING
STICK(1)
BOOM (2)
PiH
PILOT OIL MANIFOLD
DR2
T-OUT2
DR1
PSA1
PSA2
P-IN
Pi 1
P2
LOCK
SWING
TRAVEL
PUMP AND FILTER GROUP
44
33
SOS
DD
CC
BB
AA
25
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