Sơ đồ thủy lực máy đào CAT 345

Sơ đồ thủy lực máy đào CAT 345

©2005 Caterpillar All Rights Reserved

Printed in U.S.A

RENR7356-01 February 2005

345C Excavator Hydraulic System

KBA1-UP TBA1-UP MDC1-UP WDE1-UP GBH1-UP RFN1-UP DHP1-UP GJR1-UP JAR1-UP PJW1-UP BWY1-UP CPX1-UP

Without Heavy Lift and Fine Swing

LINES CROSSING LINES JOINING

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

ROTATING SHAFTS

MANUAL CONTROL SYMBOLS

HYDRAULIC MOTORS

FIXED DISPLACEMENT

VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL

BIDIRECTIONAL

HYDRAULIC PUMPS

FLUID STORAGE RESERVOIRS

CROSSING AND JOINING LINES

BASIC COMPONENT SYMBOLS

FLUID CONDITIONER PUMP or MOTOR

FLUID POWER SYMBOLS

FIXED DISPLACEMENT

VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL

BIDIRECTIONAL

VALVES

PILOT CONTROL SYMBOLS

RELEASED PRESSURE

REMOTE SUPPLY PRESSURE

SUPPLY PRESSURE

ACCUMULATORS

SOLENOID

or MANUAL

SOLENOID and PILOT

SOLENOID and PILOT or MANUAL

COMBINATION CONTROLS

HYDRAULIC AND PNEUMATIC CYLINDERS

DOUBLE ACTING SINGLE 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

CONTROLLED

Hydraulic Symbols (Electrical)

Electrical Symbols Table

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

325-PK

Wire Color Circuit Number

Identification

Wire

Wire

(EXAMPLE VALVE)

Current Standard

Transducer

G

Generator

Electrical Wire Pressure Switch

M Electric Motor

Pressure Switch (Adjustable)

Temperature Switch

T

Pressure Symbol

Temperature Symbol

Level Symbol

Flow Symbol

Electrical Symbols (Electrical)

Number

Machine Location

Schematic Location

Filter Gp - Return (Inside Hydraulic Tank) 173-3434 A-5 and A-6 42

Filter Gp - Drain Return 126-2075 A-4 and A-6 41 and 44

Valve Gp - Pilot Control Bucket / Boom 232-4158 C-7 19

Valve Gp - Pilot Control Stick / Swing 232-4157 C-8 18

Note A: See the Parts manual for specific cylinder part number.

Component Locations

7

8

25 26 28 29 30

11 12 13 14

6 4

5

33 36 38 32

43 9

10

17 18 19

21

23

DR2 T-OUT2

DR1

PSA1 PSA2

P-IN

Pi 1

P2

PAC

DR6 DR5

DR4 DR3

Pi 2 T-OUT1

HL

APi2

HR

Dr PAT

VIEW A-A

AL4

BL3 BL2 BL1

PTA PSW

X

AR3

BR3 BR1

AR2

R3

R1

aL5 aL4 bL3 aL2 bL1 bR1 bR2 aR3 aR4

Pp2 Pp1

PL

PR

bL4 aL3 bL2 aL1 dST1 aR1 aR2 aR3

Bpi BDr

Pp2 Pp1

Api ADr

dsW PiL

R2

TANK

dR4

STICK (2)

BOOM BUCKET ATT

TRAVEL (R) STR TRAVEL

TRAVEL (L)

SWING

STICK BOOM (2)

Machine Component Locations

Main Control Valve

Pilot Manifold Control Valve

LOCK SWING TRAVEL

RENR7356-01 30

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 & 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

THIS SCHEMATIC IS FOR THE 345C

Part #: 230-2696 HE 05

Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral.

LINE PATTERNS

Drain / Return Lines Component Group

Pilot / Load Sensing Pressure Pressure Line

Attachment Air Line

1 2

3 4

5 6

7 8

A

C D E F

1 2

3 4

5 6

7 8

A B C D

E F

B

STICK CYLINDER

SWING MOTOR

DB1 M1 PA1

PG1

SWING MOTOR

DB2 M2

PA2

DE1

PB1

PG2

PB2

SWIVEL GP JOINT 225-4547

TRAVEL MOTOR (LEFT)

X

AG

BR

T1 T2 L

BR

T1

T2

L

TRAVEL MOTOR (RIGHT)

AG X

P1

T-OUT2 DR2

OUT

T

IN

Pi1

PS1 D0

Pi2

a2

a5 A2 a3 PSV

A1 a1 a4

aL5

Dr

HL R2

X

dL5 (IN,OUT) (DOWN)

(OPEN) bL2

(FWD) Pp1

PiH dST1 (FWD)

(L) dSW

PiL (IN)

dR5 APi2

dR4 R1

Y

AR4 R3 HR

(UP)

aL4

ADr APi

(OUT)

(R)

(F) (B)

(BACK)

(BACK)

BDr BPi

STICK(2) BOOM

BUCKET ATCH

TRAVEL(R) TRAVEL(L)

SWING STICK

BOOM(2)

A B

Pp2

TP

TT

BACK

BACK

JLP

JLT

JRP

JRT

JR1 JR3

JR2 JR4

JL4 JL2

JL3 JL1

A1

B1

A2

B2

A3

B3

A4

B4

A5

B5

A6

B6

A7

B7

A8

B8

8 1

7 6

VALVE GP PILOT MANIFOLD 215-5037

FILTER GP RETURN 173-3434

FILTER GP DRAIN RETURN 126-2075 MOTOR GP

COOLING FAN 242-6904

VALVE GP CHECK SLOW RETURN 185-0384

VALVE GP CHECK COOLER BYPASS

123-2505

VALVE GP PILOT CONTROL STICK/SWING 232-4157

MOTOR GP LEFT SWING 225-4506

VALVE GP BOOM/SWING PRIORITY 232-4102

FILTER GP PILOT 158-8987

ACCUMULATOR GP PILOT MANIFOLD 164-6981

-µ -µ -µ -µ -µ -µ -µ -µ

NO.1 (TRAVEL) NO.2 (SWING)

NO.3 (LOCK)

aL3

aR4

AR2

BR1 AR1 bR2

bR1

bL1 BL1

AL1

bL3

PL

PR PL

aR4

-µ -µ -µ -µ

DR

B

X

MU

A CV2 MU1

A CV

MU2 MU1

A MU2

CV

PUMP GP COOLING 259-0814

PUMP GP DRIVE/IDLER

& PILOT 259-0818

DRIVE

IDLER PILOT

VALVE GP POWER SHIFT CONTROL 225-4518

FILTER GP DRAIN RETURN 126-2075

VALVE GP PILOT CONTROL BUCKET/BOOM 232-4158

VALVE GP PILOT CONTROL TRAVEL

165-9522

MOTOR GP RIGHT SWING 225-4506

VALVE GP LEFT SWING MOTOR 116-3420

MOTOR GP LEFT TRAVEL 232-6180

VALVE GP LEFT TRAVEL/BRAKE 165-9338

MOTOR GP RIGHT TRAVEL 232-6180

VALVE GP RIGHT TRAVEL/BRAKE 165-9338

VALVE GP MAIN CNTRL 230-2760

VALVE GP CHECK BOOM/STICK(2) 239-8902 VALVE GP

CHECK STICK 239-8904

VALVE GP CHECK BOOM(2) 239-8906

SWITCH AS

TRAVEL PRESS 106-0179 SWITCH AS

IMPLEMENT PRESSURE 106-0179

SENSOR GP PUMP DRIVE PRESSURE 221-8869

SENSOR GP PUMP DRIVEN PRESSURE 221-8869

VALVE GP LOCK SOL 121-1491

VALVE GP SWING BRAKE SOL 121-1491

VALVE GP TRAVEL SPEED SOL 121-1491

FILTER GP RETURN 173-3434

TANK GP HYDRAULIC 227-0431

VALVE GP BOOM DRIFT REDUCTON 153-5233 VALVE GP

STICK DRIFT REDUCTON 153-5233