INTERACTIVE SCHEMATIC
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©
2009 Caterpillar, All Rights Reserved
Printed in U.S.A.
RENR7221-04
January 2009
Stick Lowering Control Valve
345C Excavator
Hydraulic System - Attachment
TBA1-UP
ESD1-UP
WDE1-UP
TDG1-UP
GPH1-UP
TAJ1-UP
GCL1-UP
S5M1-UP
DHP1-UP
GJR1-UP
ELS1-UP
LYS1-UP
PJW1-UP
BWY1-UP
COMPONENT LOCATION
Description
Part
Number
Machine
Location
Schematic
Location
Valve Gp - Main Control 259-7780 41 C-2
Valve Gp- Load Control (Stick) 263-1965 2 E-8
Valve Gp- Load Control 263-1964 3 F-1
Valve Gp- Load Control 263-1964 4 F-3
Valve Gp- Manual Boom Lower 270-5690 5 E-2
Accumulator Gp - Pilot Manifold 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 F-8
Filter Gp - Return 24 A-5
Filter Gp - Pilot 25 A-4
Filter Gp - Return Oil 26 A-6
Motor Gp - Cooling Fan 27 A-7
Motor Gp - Left Travel 28 F-5
Motor Gp - Right Swing 29 F-6
Motor Gp - Right Travel 30 F-4
Motor Gp - Swing Left 31 F-7
Pump Gp - Cooling Fan 32 B-2
Pump Gp - Drive / Idler / Pilot Hydraulic 33 A-3
Swivel Gp 34 E-4
Tank Gp - Hydraulic Oil 35 A-6
Valve Gp - Boom/Swing Priority 36 B-4
Valve Gp - Cooler Bypass Check 37 A-7
Valve Gp - Left Swing Motor 38 E-7
Valve Gp - Left Travel / Brake 39 E-5
Valve Gp - LH Pilot Control (Stick/Swing) 40 C-7
Valve Gp - Pilot Manifold 42 B-5
Valve Gp - Pilot Travel 43 D-7
Valve Gp - RH Pilot Control (Bucket/Boom) 44 C-7
Valve Gp - Right Travel / Brake 45 E-4
Valve Gp - Slow Return Check 46 B-7
Note A: Refer to parts manual for specific cylinder information.
Attachment
Standard 345C
Load Control (Boom)
185-0384
173-3434
158-8987
126-2075
242-6904
232-6180
232-6180
225-4506
225-4506
259-0814
259-0818
225-4547
227-0431
232-4102
123-2505
116-3420
165-9338
215-5037
232-4157
165-9522
232-4158
165-9338
164-6981
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: STICK LOWERING CONTROL VALVE
MEDIA NUMBER: RENR7128-04
PART NUMBER: 230-2713, CHANGE: 01, 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
AR2 BR2
BL3 AL3
T2
BR
T1
T2
L
BG
AG
X
A
B
Dr
CYL
Pi
TCV
(4) VALVE GP
LOAD CONTROL
(5) VALVE GP
MANUAL BOOM
LOWER
(21) CYLINDER GP
BOOM
Dr
X
CYL
Pi
T
CV
BR1 AR1 AL1 BL1
BL4
µµµ µ
X
(41) VALVE GP
MAIN CONTROL
259-7780
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) (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
(46) VALVE GP
SLOW RETURN
CHECK
(37) VALVE GP
COOLER BYPASS
CHECK
(26) FILTER GP
RETURN OIL
(35) TANK GP
HYDRAULIC OIL
(24) FILTER GP
RETURN
(42) VALVE GP
PILOT MANIFOLD
(19) ACCUMULATOR GP
PILOT MANIFOLD
FILTER GP
CASE DRAIN
(36) VALVE GP
BOOM/SWING
PRIORITY
(25) FILTER GP
PILOT
(32) PUMP GP
COOLING FAN
VALVE GP
POWER SHIFT
CONTROL
(33) PUMP GP
DRIVE/IDLER
AND PILOT
HYDRAULIC
(31) MOTOR GP
SWING LEFT
(38) VALVE GP
LEFT SWING MOTOR
(29) MOTOR GP
RIGHT SWING
(40) VALVE GP
LH PILOT CONTROL
STICK/SWING
(44) VALVE GP
RH PILOT CONTROL
(BUCKET/BOOM)
(43) VALVE GP
PILOT CONTROL
TRAVEL
(30) MOTOR GP
RIGHT TRAVEL
(45) VALVE GP
RIGHT TRAVEL/BRAKE
(34) SWIVEL GP
(28) MOTOR GP
LEFT TRAVEL
(39) VALVE GP
LEFT TRAVEL/BRAKE
(3) VALVE GP
LOAD CONTROL
AA
SOS
DD
CC
BB
CYL
CV
Pi
T
(2) VALVE GP
LOAD CONTROL
(STICK)
263-1965
AR3
DR
165-9522
232-4157
185-0384
123-2505
242-6904
126-2075
227-0431
173-3434
164-6981
215-5037
232-4102
225-4506
225-4506
232-6180
232-6180
263-1964
270-5690
263-1964
158-8987
158-8987
259-0818
259-0814
225-4547
165-9338
165-9338
116-3420
232-4158
MACHINE COMPONENT LOCATIONS
46
46
45
45
43
43
42
42
41
41
40
40
39
39
38
38
37
37
36
36
35
35
34
34
32
32
31
31
30
30
29
29
28
28
27
27
26
26
24
24
23
23
22
22
21
21
21
19
19
5
5
4
4
3
3
2
2
VIEW ALL CALLOUTS
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
SOS
DD
CC
BB
AA
44
33
25
VIEW ALL CALLOUTS
