Cat 424D-RXA Backhoe Loader Electrical + Hydraulic System Schematic Manual - PDF DOWNLOAD

Page 1

Item

Part Number

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21* 22 23 24 25 26 27 28 29 30 31 32A 32B 33 34 35 36 37 38 39 40 41 42 43 44A 44B 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63* 64

178-7480 167-4235 238-8550 162-3960 190-8315 206-3553 9T-0704 9T-0704 124-8818 185-1839 188-7471 168-0361 206-3549 131-9203 130-6520 188-7471 185-5906 185-5907 180-9588 240-9716 ----143-0421 185-5902 192-0827 206-0520 206-0522 192-0827 186-3629 185-5898 239-2226 179-5593 202-2236 200-0161 206-3628 6E-6285 191-8161 137-9466 187-0524 206-0518 206-0514 9T-0704 206-0503 191-7725 190-3450 6E-4158 193-9189 3E-8622 190-3402 6E-6281 190-3400 187-0527 180-8592 180-8593 180-8594 166-7950 190-3397 6E-6284 190-3450 206-3685 203-5489 203-5490 203-5533 185-5901 191-4010 ----178-7481

FLUID POWER SYMBOLS

RENR7782 January 2004

Component Locations Schematic Location

Description

Back Pressure Check Valve (Return Oil) Steering Cylinder Metering Pump Ride Control Accumulator Ride Control Solenoid Valve Tilt Cylinder Line Relief Valve for Head End of Tilt Cylinder Line Relief Valve for Rod End of Tilt Cylinder Auxiliary Control Valve Multipurpose Bucket Cylinder (If Equipped) Auxiliary Relief Valve Loader Tilt Control Valve Loader Lift Cylinders Pressure Switch Loader Lift Control Valve Steering Priority Valve Two Bank Vavle for Loader Three Bank Valve for Loader Piston Pump Hydraulic Tank Hydraulic Oil Cooler Hydraulic Oil Filter Pilot Valve Stabilizer Control Valve Stabilizer Cylinder Stabilizer Cylinder Stabilizer Control Valve Return Manifold Stabilizer Contol Valve (Two Bank) Pressure Reducing Valve Lockout Solenoid Valve (If Equipped) Side Shift Bank Valve Cover (If Equipped) Center Pivot Bank Valve Cover (If Equipped) Boom Cylinder Line Relief for Rod End of Boom Cylinder Swing Cylinders Line Relief For Rod End of Swing Cylinder Line Relief for Head End of Backhoe Bucket Cylinder Backhoe Bucket Cylinder Backhoe Bucket Cylinder (Extendable Stick) Line Relief Valve for the Head End of Stick Cylinder Stick Cylinder Extendable Stick Cylinder (If Equipped) Extendable Stick Control Valve (If Equipped) Side Shift Bank Valve Cover (If Equipped) Center Pivot Bank Valve Cover (If Equipped) Side Shift Valve Stick Control Valve Line Relief for Rod End of Stick Cylinder Backhoe Bucket Control Valve Line Relief for Rod End of Backhoe Bucket Cylinder Backhoe Control Valve (Four Bank) Backhoe Control Valve (Five Bank) (Attachment) Backhoe Control Valve (Six Bank) (Attachment) Swing Control Valve Boom Control Valve Line Relief for Head End of Boom Cylinder Auxilary Control Valve (If Equipped) Swing Cushion Crossover Relief Valve (If Equipped) Backhoe Control Vavle (Four Bank) (Attachment - TUV) Backhoe Control Valve (Five Bank) (Attachment - TUV) Backhoe Control Valve (Six Bank) (Attachment - TUV) Pilot Valve (Two Bank) (Pilot Lever with Switch) Outlet Cover Steer Cylinder (AWD) Back Pressure Check Valve (Hammer Option)

41

D-11 E-10 D-10 E-9 D-9 E-9 E-8 E-8 E-8 F-8 F-8 D-8 D-8 D-9 D-8 C-8 C-8 C-8 C-10 C-11 C-11 D-11 E-7 E-5, E-4 F-4 F-3 E-3 E-7 D-6 D-6 C-7 C-7 A-8 C-6 C-6 C-5 C-5 C-4 C-4 C-4 C-3 C-3 C-2 C-2 C-1 A-2 C-1 B-3 B-3 B-4 B-4 B-4 B-4 B-4 B-5 B-5 B-6 B-6 C-4 B-4 B-4 B-4 E-7 F-8 E-10 D-11

BASIC COMPONENT SYMBOLS

3

MAIN AUX.

PUMP or MOTOR

CONTROL VALVES

SPRING

FLUID CONDITIONER

LINE RESTRICTION (FIXED)

RESTRICTION

PUMP: VARIABLE and PRESSURE COMPENSATED

2-SECTION PUMP

20 42

PRESSURE COMPENSATION

LINE RESTRICTION (VARIABLE)

SPRING (ADJUSTABLE)

VARIABILITY

13

HYDRAULIC PNEUMATIC ENERGY TRIANGLES

ATTACHMENT

LINE RESTRICTION VARIABLE and PRESSURE COMPENSATED

VALVES VALVE ENVELOPES

VALVE PORTS

21 TWO POSITION

ONE POSITION

TWO-WAY

THREE POSITION

CONTROL VALVES

CHECK VALVES

AB

AB

P T SHIFTED POSITION

P T NORMAL POSITION

6

FOUR-WAY

THREE-WAY

INFINITE POSITION

SPRING LOADED

BASIC SYMBOL

MEASUREMENT

38 39 PRESSURE

ROTATING SHAFTS

FLOW

TEMPERATURE

UNIDIRECTIONAL

BIDIRECTIONAL

FLUID STORAGE RESERVOIRS

416D and 424D Backhoe Loader Hydraulic System

33

416D: BGJ1050-Up

424D: RXA1-UP CJZ1-UP

VENTED

RETURN ABOVE FLUID LEVEL

PRESSURIZED

RETURN BELOW FLUID LEVEL

COMBINATION CONTROLS

SOLENOID or MANUAL

SOLENOID

SERVO

SOLENOID and PILOT or MANUAL

SOLENOID and PILOT

DETENT

THERMAL

MANUAL CONTROL SYMBOLS

23 PUSH-PULL LEVER

PEDAL

PUSH BUTTON

GENERAL MANUAL

SPRING

PILOT CONTROL SYMBOLS

31 32A 32B 34 36 37 40 43

RELEASED PRESSURE

10

44A 44B 45 46 47

48 49 50

51

52 53 54

55

4

35 57

INTERNAL RETURN

2

56

19 22

7

8

CROSSING AND JOINING LINES

ACCUMULATORS

SPRING LOADED

28

SIMPLIFIED

GAS CHARGED

LINES CROSSING

9 11 12 15 16 17 18 HYDRAULIC PUMPS FIXED DISPLACEMENT

416D, 424D SINGLE TILT LOADER WITH CENTER PIVOT OR SIDE SHIFT BACKHOE

HYDRAULIC AND PNEUMATIC CYLINDERS

SINGLE ACTING

LINES JOINING

FIXED DISPLACEMENT

VARIABLE DISPLACEMENT NON-COMPENSATED

UNIDIRECTIONAL

UNIDIRECTIONAL

BIDIRECTIONAL

BIDIRECTIONAL

DOUBLE ACTING

INTERNAL PASSAGEWAYS

HYDRAULIC MOTORS

VARIABLE DISPLACEMENT NON-COMPENSATED

INTERNAL SUPPLY PRESSURE

COMPLETE

5 14

24 27 29 30

25 26

EXTERNAL RETURN

REMOTE SUPPLY PRESSURE

TWO POSITION

THREE POSITION

INFINITE POSITIONING

PARALLEL FLOW

FLOW IN ONE DIRECTION

CROSS FLOW

FLOW ALLOWED IN EITHER DIRECTION

Printed in U.S.A.

© 2004 Caterpillar All Rights Reserved

Electrical Symbols Table

* Part number not available at time of publication.

Hydraulic Symbols (Electrical)

CC

BB

G

52 Transducer (Fluid)

B

Transducer (Gas / Air)

M

Generator

Electric Motor

19

Description PUMP SIGNAL PRESSURE TEST PORT PUMP PRESSURE TEST PORT PILOT PRESSURE TEST PORT

Schematic Location C-9 B-9 E-5

Pressure Reducing Valve (Stabilizer) (52), Pilot Oil Pressure Test Port (CC)

4

B

Hydraulic Pump (19), Signal Pressure Test Port (AA)

Pressure Switch (Adjustable)

Pressure Switch

Electrical Symbols (Electrical)

Ride Control Pressure Switch F738-WH 200-BK

LEFT SIDE VIEW

Side Shift Lock Solenoid H771-BR 200-BK

Ride Control Solenoid 976-OR 200-BK

14

T

Pressure Symbol

45

C

Temperature Symbol

Electrical Schematic Example

420D Backhoe Loader (BKC)

SEBP3584

432D Backhoe Loader (WEP & TDR)

SEBP3971

Specifications: (Hydraulic & Steering System)

RENR7778

Testing and Adjusting: (Hydraulic & Steering System)

RENR7779

Specifications: (Axles, Differentials & Brakes)

RENR7776

Testing and Adjusting: (Axles, Differentials & Brakes)

RENR7777

Harness identification code This example indicates wire 135 in harness "AG".

4

AA

SEBP3967

Machine System

Current Standard

Current Standard

Media Number

420D Backhoe Loader (BMC)

Wire Circuit Number Identification

19

Wire Color

325-AG135 PK-14

C

325-PK Circuit Identification Number

SECTION B-B SECTION C-C

Electrical System Schematic: (Electrical system)

Hydraulic Schematic Example

50 51 52 SEBP3583

442D Backhoe Loader (TBD & SMJ)

Flow Symbol

Level Symbol

Wire Number Identification Codes

5

Related Manuals Description Parts Manual

Electrical Wire

Temperature Switch

Wire Color

Wire Gauge

Previous Standard

RENR7781

RIDE CONTROL

Wire Color

Wire

325-PK-14

Hydraulic Pump (19), Pump Pressure Test Port (BB)

Accumulator (4) , Pressure Switch (14), Ride Control Valve (5)

Backhoe Valve (50, 51 or 52) , Side Shift Clamp Valve (45)

B Circuit Number Identification

A

Wire Gauge (EXAMPLE VALVE)

20 Page, B/W, DGM

Tap Number AA BB CC

RENR7782-00

Tap Locations Pressure, Sampling, and Sensor


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