INTERACTIVE SCHEMATIC
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©
2010 Caterpillar, All Rights Reserved
Printed in U.S.A.
RENR7379-06
May 2010
Reversable Fan
345C and 345C MH Excavator
Hydraulic System - Attachment
345C:
TBA1-UP
SPC1-UP
ESD1-UP
MTE1-UP
WDE1-UP
TDG1-UP
GPH1-UP
TAJ1-UP
GCL1-UP
345C:
S5M1-UP
DHP1-UP
GJR1-UP
M2R1-UP
D3S1-UP
ELS1-UP
LYS1-UP
PJW1-UP
BWY1-UP
345C MHPU
345C: MHPU
M3E1-UP
M3F1-UP
COMPONENT LOCATION
Description
Part
Number
Machine
Location
Schematic
Location
Motor Gp - Fan 200-3252 1
B-7
Valve Gp - Control, Reverse Flow 234-4624 2
A-7
Valve Gp - Solenoid 242-6880 3 B-7
Valve Gp - Relief 242-6881 4 A-7
Accumulator Gp - Pilot Manifold 164-6981 20 B-4
Cylinder Gp - Boom Note A 21 F-2
Cylinder Gp - Bucket Note A 22 F-1
Cylinder Gp - Stick Note A 23 F-1
Filter Gp - Drain Return 126-2075 24 A-3
Filter Gp - Pilot 158-8987 25 B-4
Filter Gp - Return Oil 173-3434 26 A-5
Motor Gp - Left Travel 232-6180 27 F-5
Motor Gp - Right Swing 225-4506 28 F-6
Motor Gp - Right Travel 232-6180 29 F-4
Motor Gp - Swing Left 225-4506 30 F-7
Pump Gp - Drive / Idler / Pilot Hydraulic 259-0818 31 B-3
Swivel Gp 225-4547 34 E-4
Tank Gp - Hydraulic Oil 227-0431 35 A-5
Valve Gp - Boom/Swing Priority 232-4102 36 B-4
Valve Gp - Cooler Bypass Check 123-2505 37 B-6
Valve Gp - Left Swing Motor 116-3420 38 E-6
Valve Gp - Left Travel / Brake 165-9338 39 E-5
Valve Gp - LH Pilot Control (Stick/Swing) 232-4157 40 C-7
Valve Gp - Main Control 230-2760 41 D-2
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-6
Valve Gp - Right Travel / Brake 165-9338 45 E-4
Valve Gp - Slow Return Check 185-0384 46 B-7
Attachment: Reversable Fan
Standard 345C
Note A: Refer to parts manual for specific cylinder information.
Sensor Gp - Left Pump Pressure 221-8869 32
B-2
Sensor Gp - Right Pump Pressure 221-8869 33 B-2
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 B-2
DD Idler Pump Delivery Pressure B-2
SOS Hydraulic Oil Sampling Port A-3
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
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
PILOT PUMP OUTPUT
SUPPLY LINE
RIGHT MAIN PUMP OUTPUT
LEFT MAIN PUMP OUTPUT
POWER SHIFT CONTROL CIRCUIT
REVERSING FAN PUMP
ATTACHMENT CONTROL CIRCUIT
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
LEFT TRAVEL CONTROL & LEFT TRAVEL MOTOR CIRCUIT
SWING CONTROL & SWING MOTOR CIRCUIT
SWING BRAKES
THIS SCHEMATIC IS FOR THE 345C AND 345C MH EXCAVATOR
345C MHPU
ATTACHMENT: REVERSABLE FAN
MEDIA NUMBER: RENR7379-06
PART NUMBER: 239-8958, CHANGE: 00, VERSION: HE
Components are shown installed on a fully operable machine.
Refer to the appropriate Service Manual for Troubleshooting, Specifications.
A
B
C
D
E
F
1234567
A
B
C
D
E
F
1234567
TRAVEL MOTOR (LEFT) TRAVEL MOTOR (RIGHT)
BUCKET
(22) CYLINDER GP
BUCKET
(21) CYLINDER GP
BOOM
(23) CYLINDER GP
STICK
SWING MOTOR
SWING MOTOR
BOOM(1)
STICK(2)
BUCKETATCH
TRAVEL(R)
TRAVEL(L)
SWINGSTICK(1)BOOM(2)
TRAVEL(R)TRAVEL(L)
SWINGSTICK BOOM
BUCKET
OUT IN R L OPEN CLOSE DOWN UP
HL
aL5
Dr
R2
X
Pp1
R1
Y
HR
AR4
R3
Pi1P2 P-IN PSA2 DR1
T-OUT2
DR2
DR3
DR4
Pi2 DR5 DR6T-OUT1
P1 P2
T
B1 A1 B2 A2
A4 B1 Dr1 Di PS2 PB
Pi2
A3
B3
D0 PS1 Pi1
a2
a5
a3
A2
a1
a4
A1
PSV
P1
dR4
PG2
PB2
DE2 B2A2
PA2
M2
DB2
PG1
PB1
DE1
B1A1
PA1
M1
DB1
BA
X
BA
B
A
MA MAMB MB
L' L'
T2 T2
T1 T1
BR BR
dL5(DOWN)
BPi
BDr
(UP)
(CLOSE)
AL2
BL2
aL2PAT
(OPEN)
(34) SWIVEL GP
225-4547
bL2
(F)(B)
PTAPSW
(BACK)
(FWD)
dST1
(BACK)(F)(B)(R)
(FWD)(L)
(R) (L)
dSW
PiL
(IN)
(OUT)
APi
ADr
aR4
(UP)
APi2 dR5
PSA1
X
(IN,OUT)
Pp2
PC
PG
T
OUT
IN
TP TT
BACK FWD FWD
T5 T2T1 T3 T6 T4
BACK
JLP JLT
JL1 JL3 JL2 JL4 JR4 JR2 JR3 JR1
JRP JRT
PiH
B A
AB
L2L3DR1
DR
T
P
S
T
Pi
P
T
S
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
A8
B8
µµµ µ
µµµ µµµµ µ
NO.1(TRAVEL)
NO.2(SWING)
NO.3(LOCK)
BR3 AR3
AR2 BR2
AL3BL3
BL4 AL4
AR1BR1 AL1 BL1
bR1 aR1 aL1 bL1
aR3 bR3bR2 aR2aL3bL3 bL4aL4
AR3
BR3
aR3
BR2
AR2
bR2
BR1
AR1
bR1
bL1
BL1
AL1
bL3
BL3 AL3
aL4
BL4
AL4
bR3 aR2 aR1
PR
PL aL1 aL3
bL4
PR
PL
BB
(31) PUMP GP
DRIVE/IDLER
AND PILOT
HYDRAULIC
259-0818
VALVE GP
POWER SHIFT
CONTROL
(32) SENSOR GP
LEFT PUMP
PRESSURE
221-8869
(33) SENSOR GP
RIGHT PUMP
PRESSURE
221-8869
(42) VALVE GP
PILOT MANIFOLD
215-5037
(26) FILTER GP
RETURN OIL
173-3434
(24) FILTER GP
DRAIN RETURN
126-2075
(36) VALVE GP
BOOM/SWING
PRIORITY
232-4102
(25) FILTER GP
PILOT
158-8987
(20) ACCUMULATOR GP
PILOT MANIFOLD
164-6981
(35) TANK GP
HYDRAULIC OIL
227-0431
(46) VALVE GP
SLOW RETURN CHECK
185-0384
(37) VALVE GP
CHECK COOLER
BYPASS
123-2505
(40) VALVE GP
RH PILOT CONTROL
STICK/SWING
232-4157
(44) VALVE GP
RH PILOT CONTROL
BUCKET/BOOM
232-4158
(43) VALVE GP
PILOT CONTROL
TRAVEL
165-9522
SWITCH AS.
TRAVEL PRESSURE
SWITCH AS.
IMPLEMENT
PRESSURE
(41) VALVE GP
MAIN CONTROL
230-2760
(27) MOTOR GP
LEFT TRAVEL
232-6180
(39) VALVE GP
LEFT TRAVEL /
BRAKE
165-9338
(29) MOTOR GP
RIGHT TRAVEL
232-6180
(45) VALVE GP
RIGHT TRAVEL /
BRAKE
165-9338
(30) MOTOR GP
LEFT SWING
225-4506
(28) MOTOR GP
RIGHT SWING
225-4506
(38) VALVE GP
LEFT SWING
MOTOR
116-3420
VALVE GP
BOOM DRIFT
REDUCTION
VALVE GP
STICK DRIFT
REDUCTION
(3) VALVE GP
SOLENOID
242-6880
(2) VALVE GP
CONTROL
(REVERSE FLOW FAN)
234-4624
(1) MOTOR GP
FAN
200-3252
(4) VALVE GP
RELIEF
242-6881
DD
AA SOS
CC
MACHINE COMPONENT LOCATIONS
46
46
45
45
44
44
43
43
42
42
41
41
40
40
39
39
38
38
37
37
36
36
35
35
34
34
33
33
32
32
30
30
29
29
28
28
27
27
26
26
24
24
23
23
22
22
21
21
21
20
20
4
4
3
3
2
2
1
1
VIEW ALL CALLOUTS
PUMP AND FILTER GROUP
31
25
SOS
DD
CC
BB
AA
VIEW ALL CALLOUTS
MAIN CONTROL VALVE
AL4
BL4 AL3 AL2 AL1 AR1
BL3 BL2 BL1
PTA
PSW
X
BR2
AR4
AR3
BR3
BR1
AR2
PiL
STICK (2)
BOOM (1)
BUCKET
ATT
TRAVEL (R) STR TRAVEL
TRAVEL (L)
SWING
STICK (1)
BOOM (2)
PiH
Y
PILOT OIL MANIFOLD
DR2 T-OUT2
DR1
PSA1
PSA2
P-IN
Pi 1
P2
LOCK SWING TRAVEL
