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CAT 345C Excavator and 345C MHPU Hydraulic System Attachment Hydraulic Variable Gauge Undercarriage

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Hydraulic System - Attachment
345C Excavator and 345C MHPU
Hydraulic Variable Gauge Undercarriage
©
2010 Caterpillar, All Rights Reserved
Printed in U.S.A.
RENR7378-01
November 2010
SPC1-UP
M3E1-UP
M3F1-UP
COMPONENT LOCATION
Description
Part
Number
Machine
Location
Schematic
Location
Accumulator GP - Hydraulic (Charged) Note B B-5 1
Cylinder GP - Boom Note A E-2 2
Cylinder GP - Bucket Note A E-3 3
Cylinder GP - Stick Note A E-8 4
Cylinder GP - Track Note B F-3 5
Filter and Valve GP - Pilot Oil Note B A-4 6
Filter GP - Hydraulic Oil (Case Drain) 1 Note B A-5 7
Filter GP - Hydraulic Oil (Case Drain) 2 Note B A-7 8
Filter GP - Hydraulic Oil (Return) Note B A-6 9
Manifold GP - Control (Pilot Oil) Note B B-6 10
Motor GP - Hydraulic Fan Note B A-8 11
Motor GP - Swing (Left) Note B F-7 12
Motor GP - Swing (Right) Note B F-6 13
Motor GP - Travel (Left) Note B F-5 14
Motor GP - Travel (Right) Note B F-4 15
Pump GP - Hydraulic (Main) Note B B-3 16
Pump GP - Hydraulic Fan Note B B-2 17
Sensor AS - Pressure (Drive Pump) Note B B-2 18
Sensor AS - Pressure (Idler Pump) Note B A-2 19
Solenoid Valve GP - Fine Swing Note B F-7 20
Solenoid Valve GP - Heavy Lift Note B B-3 21
Solenoid Valve GP - Hydraulic Lockout Note B B-5 22
Solenoid Valve GP - Power Shift Note B B-3 23
Solenoid Valve GP - Swing Brake Note B B-6 24
Solenoid Valve GP - Travel Speed Note B B-6 25
Switch AS - Pressure (Implement) Note B D-4 26
Switch AS - Pressure (Travel) Note B D-4 27
Tank GP - Hydraulic Note B A-6 28
Valve GP - Boom Drift Reduction Note B D-2 29
Valve GP - Check (Cooler Bypass) Note B A-8 30
Valve GP - Check (Slow Return) Note B B-8 31
Valve GP - Control (Boom/Bucket) Note B C-7 32
Valve GP - Control (Main) Note B C-2 33
Valve GP - Control (Stick/Swing) Note B C-8 34
Valve GP - Pilot (Travel) Note B D-8 35
Valve GP - Pressure Reducing (Boom/Swing Priority) Note B B-4 36
Valve GP - Stick Drift Reduction Note B D-5 37
Valve GP - Swing Cushion (Left Swing) Note B E-7 38
Valve GP - Travel Counterbalance (Left) Note B E-6 39
Valve GP - Travel Counterbalance (Right) Note B F-4 40
Swivel GP 234-7109 E-5 41
Valve GP - Manual 121-9164 F-2 42
Valve GP - Pressure Reducing (Hydraulic Variable Gauge Track) 124-1331 F-2 43
Note A: See the Parts manual for specific cylinder part number.
Note B: See the Parts manual for specific part number.
Attachment: Hydraulic Variable Gauge Undercarriage
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
DRAIN / RETURN LINE
LINES GROUP COLOR DESCRIPTIONS
DRIVE PUMP OUTPUT
IDLER PUMP OUTPUT
POWER SHIFT CONTROL CIRCUIT
PILOT PUMP OUTPUT
HYDRAULIC OIL COOLING PUMP OUTPUT
ATTACHMENT CONTROL CIRCUIT
SUPPLY LINE
BUCKET CONTROL AND BUCKET CYLINDER CIRCUIT
RIGHT TRAVEL CONTROL AND RIGHT TRAVEL MOTOR CIRCUIT
TRAVEL SPEED CONTROL CIRCUIT
STICK CONTROL AND STICK CYLINDER CIRCUIT
BOOM CONTROL AND BOOM CYLINDER CIRCUIT
HEAVY LIFT CONTROL CIRCUIT
LEFT TRAVEL CONTROL AND LEFT TRAVEL MOTOR CIRCUIT
SWING CONTROL AND SWING MOTOR CIRCUIT
SWING BRAKE CONTROL CIRCUIT
TRACK CONTROL AND TRACK CYLINDER CIRCUIT
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling, Sensor - by letter)
YY
THIS SCHEMATIC IS FOR THE 345C EXCAVATOR
AND 345C MHPU HYDRAULIC SYSTEM
ATTACHMENT: HYDRAULIC VARIABLE GAUGE UNDERCARRIAGE
MEDIA NUMBER: RENR7378-01
PART NUMBER: 258-2243, CHANGE: 01, VERSION: V
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
A
C
B
D
(4) CYLINDER GP
STICK
SWING MOTOR
DB1
M1
PA1
A
B
PG1
SWING MOTOR
DB2
M2
PA2
A1
B1
DE1
PB1
PG2
PB2
A2
B2
DE2
TRAVEL(L) TRAVEL(R)
TRAVEL MOTOR (LEFT)
X
AG
BR
T1
T2
L
BR
T1
T2
L
A B
BG
BG
TRAVEL MOTOR (RIGHT)
AG
X
STICK
SWING
BUCKET
BOOM
OUT
IN
L
R OPEN CLOSE DOWN
UP
P1
P2 Pi1 P-IN PSA2 DR1 PSA1
T-OUT2 DR2
DR3 DR4 Pi2 DR5 DR6T-OUT1
B1
A1
A2
B2
OUT
T
PG
IN
Pi1
PS1D0
A4 B1 Dr1 Di PS2 PB
Pi2
a2
a5
A2
a3
PSV
A1
a1
a4
aL5
Dr
HL
R2
X
dL5 (IN)(DOWN)(OPEN)bL2(FWD)
Pp1
PiHdST1(FWD)(L)dSWPiL(IN)dR5APi2dR4
R1
Y
AR4
R3
HR
(UP)
aL4
ADr
APi
(OUT)
(R) (L)
(R)
(F)(B)
(BACK)
PSW PTA
(BACK)
(B) (F) PAT BL2 AL2aL2
(CLOSE)
(UP)
BDr
BPi
STICK(2)BOOM(1)BUCKETATCHTRAVEL(R)TRAVEL(L)SWINGSTICK (1)BOOM(2)
A
B
P1
P2
A
T
P
T
Pp2
TP
TT
BACK
T1 T2
FWD
FWD
T3 T4
BACK
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
8
1
7
6
µ
µ µ
µµ
µ µ
µ
bR1 aR1 aL1 bL1
aR3 bR3bR2 aR2aL3bL3 bL4aR4
BR3 AR3
AR2 BR2 BR1 AR1 AL1 BL1
BR3 AR3
aR3
BR2
AR2
BR1
AR1
bR2
bR1
bL1
BL1
AL1
bL3
bR3
aR2 aR1
PL
PR
aL1
aL3 bL4
PR
PL
aR4
µ
µ µ
µ
DR
DR1
L2L3
A B
S LL1
B
X
(17) PUMP GP
HYDRAULIC FAN
(16) PUMP GP
HYDRAULIC
(MAIN)
(23) SOLENOID
VALVE GP
POWER SHIFT
(18) SENSOR AS
PRESSURE (DRIVE PUMP)
(19) SENSOR AS
PRESSURE
(IDLER PUMP)
DRIVE
IDLER
PILOT
(10) MANIFOLD GP
CONTROL (PILOT OIL)
(9) FILTER GP
HYDRAULIC OIL
(RETURN)
(8) FILTER GP
HYDRAULIC OIL (CASE DRAIN) 2
(36) VALVE GP
PRESSURE
REDUCING
(BOOM/SWING
PRIORITY)
(1) ACCUMULATOR GP
HYDRAULIC
(CHARGED)
(28) TANK GP
HYDRAULIC
(11) MOTOR GP
HYDRAULIC FAN
(31) VALVE GP
CHECK (SLOW RETURN)
(30) VALVE GP
CHECK (COOLER BYPASS)
(34) VALVE GP
CONTROL (STICK/SWING)
(32) VALVE GP
CONTROL
(BOOM/BUCKET)
(35) VALVE GP
PILOT (TRAVEL)
(27) SWITCH AS
PRESSURE (TRAVEL)
(26) SWITCH AS
PRESSURE
(IMPLEMENT)
(33) VALVE GP
CONTROL (MAIN)
(41) SWIVEL GP
234-7109
(14) MOTOR GP
TRAVEL (LEFT)
(39) VALVE GP
TRAVEL
COUNTERBALANCE
(LEFT)
(15) MOTOR GP
TRAVEL (RIGHT)
(40) VALVE GP
TRAVEL COUNTERBALANCE (RIGHT)
(12) MOTOR GP
SWING (LEFT)
(13) MOTOR GP
SWING (RIGHT)
(38) VALVE GP
SWING CUSHION
(LEFT SWING)
(20) SOLENOID VALVE GP
FINE SWING
(21) SOLENOID
VALVE GP
HEAVY LIFT
(29) VALVE GP
BOOM DRIFT REDUCTON
(37) VALVE GP
STICK DRIFT
REDUCTON
(OUT)
5
PC
a1
a2
R1
T2
T1
P2
P1
A
C
B
D
GH
H1
G1
a2
a1
H
H1
G
G1
(42) VALVE GP
MANUAL
121-9164
(43) VALVE GP
PRESSURE REDUCING
(HYDRAULIC VARIABLE GAUGE TRACK)
124-1331
AA
SOS
DD
CC
BB
(25) SOLENOID VALVE GP
TRAVEL SPEED
(24) SOLENOID VALVE GP
SWING BRAKE
(22) SOLENOID VALVE GP
HYDRAULIC LOCKOUT
(7) FILTER GP
HYDRAULIC OIL
(CASE DRAIN) 1
(6) FILTER AND VALVE GP
PILOT OIL
(3) CYLINDER GP
BUCKET
(2) CYLINDER GP
BOOM
(5) CYLINDER GP
TRACK

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