Retroexcavadora 450 e

INTERACTIVE SCHEMATIC Bookmarks

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EC-C2 EC-C3

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E-C60 E-C61

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VIEW ALL CALLOUTS EC-C1

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ELECTRICAL SYMBOLS

HOTKEYS (Keyboard Shortcuts)

BASIC HYDRAULIC COMPONENT SYMBOLS

T

FUNCTION Zoom In Zoom Out Fit to Page Hand Tool Find

KEYS “CTRL” / “+” “CTRL” / “-” “CTRL” / “0” (zero) “SPACEBAR” (hold down) “CTRL” / “F”

Pressure Switch

Temperature Switch

Level Switch

Flow Switch

Circuit Breaker

Click here to view the Schematic Symbols and Definitions page

Pump or Motor

Variability

Fluid Conditioner

Spring (Adjustable)

SCHEMATIC SYMBOLS AND DEFINITIONS INTERNAL PASSAGEWAYS

VALVES

ENVELOPES

Two Position

One Position

Three Position

PORTS

Two-way

Three-Way

FLOW IN ONE DIRECTION

FLOW ALLOWED IN EITHER DIRECTION

Infinite Positioning

Two Position

PARALLEL FLOW

PUMPS

Unidirectional

Three Position

Unidirectional

CONTROL AB

AB

P T

P T

Single Acting

Spring Loaded

Fluid Conditioner

Spring (Adjustable)

Spring

Pressure Compensation

Control Valves

Line Restriction (Variable)

Restriction

Line Restriction (Fixed)

Line Restriction Variable and Pressure Compensated

2-Section Pump

Attachment

Pump: Variable and Pressure Compensated

Bidirectional

MOTORS

Double Acting

Infinite Position

CHECK

Basic Symbol

Variability

FIXED DISPLACEMENT

Shifted Position

Normal Position

Pump or Motor

Bidirectional

VARIABLE DISPLACEMENT NON- COMPENSATED

CYLINDERS

Four-Way

BASIC HYDRAULIC COMPONENT SYMBOLS

FIXED DISPLACEMENT

CROSS FLOW

ACCUMULATORS

Shuttle

Unidirectional

VARIABLE DISPLACEMENT NON- COMPENSATED

Pilot Controlled

Spring Loaded Gas Charged

Unidirectional

PILOT CONTROL

Bidirectional

ROTATING SHAFTS

RELEASED PRESSURE

External Return

Bidirectional

Unidirectional

Internal Return

Bidirectional

REMOTE SUPPLY PRESSURE

Simplified

Complete

Internal Supply Pressure

Hydraulic Pneumatic Energy Triangles

COMBINATION CONTROLS

Solenoid

Solenoid or Manual

Solenoid and Pilot

Solenoid and Pilot or Manual

MEASUREMENT

LINES

Servo

Thermal

Detent

Crossing

Joining

Manual Shutoff

General Manual

Push Button

Pedal

Spring

Vented

Pressurized

Transducer (Fluid)

Transducer (Gas / Air)

M

Generator

Electric Motor

Flow

Return Above Fluid Level

Return Below Fluid Level

ELECTRICAL SYMBOLS

HYDRAULIC SYMBOLS - ELECTRICAL G

Temperature

Pressure

FLUID STORAGE RESERVOIRS

MANUAL CONTROL

Push-pull Lever

MAIN AUX.

T

Pressure Switch

Pressure Switch (Adjustable)

Temperature Switch

Electrical Wire

Pressure Switch

Temperature Switch

BASIC ELECTRICAL COMPONENT SYMBOLS

Level Switch

Flow Switch

Circuit Breaker

HARNESS AND WIRE SYMBOLS Wire, Cable, or Harness Assembly Identification: Includes Harness Identification Letters and Harness Connector Serialization Codes (see sample).

Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it. Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has screw terminals and a wire can be disconnected from it. Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be disconnected from the component.

AG-C4 111-7898 Part Number: for Connector Plug

1

L-C12 3E-5179

2

Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine.

Receptacle Pin or Socket Number

Plug

Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.

Harness Identification Letter(s): (A, B, C, AA, AB, AC, ...) Harness Connector Serialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness (C1, C2, C3, ...)

Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.

T

Sender: A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure. Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay. Solenoid: A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work. Magnetic Latch Solenoid: An electrical component that is activated by electricity and held latched by a permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time the coil latches.

L-C12 3E-5179 5A Fuse (5 Amps)

Harness identification code: This example indicates wire group 325, wire 135 in harness "AG".

9X-1123

Component Part Number

325-AG135 PK-14 Wire Gauge Wire Color

1 2

Deutsch connector: Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.

1 2

Sure-Seal connector: Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.

UENR0270-01 November 2012

450E Backhoe Loader Hydraulic System RBA1-UP LYR1-UP

Volume 1 of 2: Pilot (Center Pivot) Volume 2 of 2: Mechanical (Center Pivot)

COMPONENT TABLE (PILOT) COMPONENT LIST (PILOT) Part Number

Description

Machine Schematic Location Location

PUMP GP. (Primary)

269-9336

1

B-4

PUMP GP. (Secondary)

280-7873

2

B-3

HYDRAULIC TANK

272-0008

3

A-3

TANK GROUP

245-0169

4

A-3

N/A

5

A-3

FILTER

359-7232

6

B-2

HMU

270-1590

7

A-5

STEER CYLNDER

238-5285

8

A-6

LIFT CYLNDER

375-0717

9

C-8

TILT CYLNDER

375-0716

10

B-8

MP BUCKET CYLNDER (OPT)

226-5540

11

B-8

Left Hand

375-0721

12A

F-3

Right Hand

375-0722

12B

F-7

COOLER

STABILIZER CYLINDERS BOOM CYLINDER

375-0723

13

F-6

STICK CYLNDER

375-0718

14

F-5

SWING

CYLNDER

297-4896

15

F-5

BUCKET CYLNDER

375-0719

16

F-4

E-STICK CYLNDER (OPT).

375-0720

17

F-4

VALVE GROUP ( 2-BANK) PILOT - LEVER W/DTNT & SWTCH

359-7248

18

C-5

PILOT

267-2758

19

C-4

MANIFOLD - PILOT

268-0094

20

C-6

VALVE GP - CUSHION RELIEF

283-6331

21

F-4

ACCUMULATOR

226-0420

22

E-7

RIDE CNTRL VALVE (OPT)

245-8780

23

D-8

RIDE CNTRL ACCMLTR (OPT)

345-3672

24

D-8

RIDE CNTR PRES. SWTCH (OPT)

304-5696

25

D-8

TEMP. SENSOR

246-4297

26

B-3

DIFF. PRES. SWITCH

134-0404

27

B-3

LOADER VALVE (ST) 2 BANK

271-0512

28

A-7, C-7

3 BANK

271-0513

28

A-7, C-7

INLET SECTION

343-7137

28A

C-7

LIFT SECTION

271-0521

28B

C-7

28C

B-7

TILT SECTION

2 BANK

271-0522

3 BANK

271-0522

AUX SECTION

271-0523

28D

B-7

OUTLET MANIFOLD

269-1079

28E

28E

BACKHOE VALVE 7 BANK

271-0527

29

F-7, F-2

8 BANK

271-0528

29

F-7, F-2

INLET SECTION

341-4726

29A

E-7

271-0541

29B

E-3

Right Hand 271-0541

29B

E-7

AUX SECTION

271-0547

29C

E-6

BOOM SECTION

271-0542

29D

E-6

STICK SECTION

341-8185

29E

E-5

SWING SECTION

271-0544

29F

E-5

BUCKET SECTION

271-0545

29G

E-4

E-STICK SECTION

271-0546

29H

E-3

OUTLET MANIFOLD

271-0539

29J

E-2

PATTERN SWITCHING VALVE

299-9072

29K

E-5

STABILIZER SECTION

Left Hand

VALVE GP - RELIEF

260-3022

30

E-2

PRESSURE REUDCING VALVE

300-0430

31

E-7

COMPONENT TABLE (MECHANICAL) COMPONENT LIST (MECHANICAL) Part Number

Description

Machine Schematic Location Location

PUMP GP. (Primary)

269-9336

1

B-4

PUMP GP. (Secondary)

280-7873

2

B-3

HYDRAULIC TANK

272-0008

3

A-3

TANK GROUP

245-0169

4

A-3

N/A

5

A-3

FILTER

307-9799

6

B-2

HMU

297-1590

7

A-6

STEER CYLINDER

238-5285

8

A-6

LIFT CYLINDER

125-7895

9

B-8

TILT CYLINDER

100-7844

10

B-8

MP BUCKET CYLINDER (OPT)

226-5540

11

A-8

Left Hand

270-7290

12A

F-3

Right Hand

270-7291

12B

F-7

270-7285

13

F-6

STICK CYLINDER

270-7286

14

F-5

SWING

CYLINDER

297-4896

15

F-4

BUCKET CYLINDER

270-7287

16

F-4

E-STICK CYLINDER (OPT).

270-7288

17

F-3

COOLER

STABILIZER CYLNDERS BOOM CYLINDER

VALVE GROUP ( 2-BANK) PILOT - LEVER W/DTNT & SWTCH

223-4715

18

D-4

MANIFOLD - PILOT

268-0094

20

B-5

VALVE GP - CUSHION RELIEF

283-6331

21

F-4

ACCUMULATOR

226-0420

22

C-5

RIDE CNTRL VALVE (OPT)

245-8780

23

C-8

RIDE CNTRL ACCMLTR (OPT)

162-3960

24

C-8

RIDE CNTR PRES. SWTCH (OPT)

304-5696

25

C-8

TEMP. SENSOR

246-4297

26

B-3

DIFF. PRES. SWITCH

134-0404

27

B-3

LOADER VALVE (ST) 2 BANK

342-6662

28

A-8, C-8

3 BANK

342-6663

28

A-8, C-8

INLET SECTION

348-4573

28A

C-7

LIFT SECTION

348-4574

28B

B-7

28C

B-7

28D

A-7

TILT SECTION

2 BANK

348-4575

3 BANK

348-4576 348-4577

AUX SECTION

BACKHOE VALVE 7 BANK

342-6667

29

E-8, E-2

8 BANK

342-6668

29

E-8, E-2

INLET SECTION

348-4578

29A

E-8

Left Hand

348-4584

29B

E-3

Right Hand

348-4584

29B

E-7

AUX SECTION

348-9819

29C

E-6

BOOM SECTION

348-4579

29D

E-6

STICK SECTION

348-4582

29E

E-5

SWING SECTION

348-4580

29F

E-4

BUCKET SECTION

348-4581

29G

E-4

E-STICK SECTION

348-4583

29H

E-3

OUTLET MANIFOLD

348-4585

29J

E-2

VALVE GP - RELIEF

345-7712

30

D-2

PRESSURE REUDCING VALVE

300-0430

31

C-5

VALVE - CHECK

123-4750

32

D-7

STABILIZER SECTION

TAP TABLE (PILOT)

TAP LOCATIONS Tap T1 T2 T3 SOS

Description Pump Discharge Load Sense Pilot Pressure Oil Sampling

TAP TABLE (MECHANICAL)

TAP LOCATIONS Tap T1 T2 T3 SOS

Description Pump Discharge Load Sense Pilot Pressure Oil Sampling

8

7

6

5

4

3

2

(21) Valve Gp - Cushion Relief: 283-6331

(15) Swing Cylinders: 297-4896

1

BOOSTED BRAKES (REF)

(16) Bucket Cylinder: 270-7287

TO REAR AXLE LEFT WHEEL BRAKE

(12B) RH Stabilizer Cylinder: 270-7291

(13) Boom Cylinder: 270-7285

(17) E-Stick Cylinder: 270-7288

(14) Stick Cylinder: 270-7286

(12A) LH Stabilizer Cylinder: 270-7290

LEFT BRAKE PEDAL

F

F

(29) Loader Vlave (7 Bank): 271-0527 (29) Loader Vlave (8 Bank): 271-0528 (29E) Stick Section: 341-8185

(22) Accumulator: 226-0420

BACKHOE VALVE

TO REAR AXLE RIGHT BRAKE PEDAL

RIGHT WHEEL BRAKE

BS

BT

P2

(31) Press Reducing Valve: 300-0430

P7

P15

P13

P11

P10

P14

P8

P7

P1 P12

P9

E

E P20

PR1

STAB RH

(29A) Inlet Section: 341-4726

(29B) Stabilizer Section: 271-0541

AUX.

BOOM

(29C) AUX Section: 271-0547

STICK

SWING

(29D) Boom Section: 271-0542

(29G) Bucket Section: 271-0545

NOTE: Aux Section not avalible on the 7 Bank Valve

E-STICK

STAB LH

(29B) Stabilizer Section: 271-0541 (29H) E-Stick Section: 271-0546

(29J) Outlet Manifold: 271-0539

(30) Valve Gp Relief: 260-3022

(29F) Swing Section: 271-0544

(29K) Boom Section: 299-9072

(25) Ride Cntrl. Pres. Switch (Opt.): 304-5696

BUCKET

(24) Ride Cntrl. Accmltr (Opt): 169-3960 (23) Ride Cntrl. Valve (Opt): 245-8780

D

D

STABILIZER JOYSTICK

P1

LEFT JOYSTICK

RIGHT JOYSTICK

(28A) Inlet Section: 271-0520

T3

(18) Pilot - Lever w/DTNT and Switch: 223-4715

(19) Pilot: 267-2758

C

C

(28B) Lift Section: 271-0521

DEL

LIFT

(9) Lift CylinderS: 125-7895

(10) Tilt Cylinder: 100-7844

T2

(20) Pilot - Manifold: 297-1590

(1) Pump Gp. (Primary): 269-9336

(28C) Tilt Section: 271-0522

P4

P5

TILT (26) Temp. Sensor: 246-4297

(6) Filter: 307-9799

HMU

B

IMPLEMENT and STEERING PUMP CIRCUIT PILOT OIL CIRCUIT

T1

P3

(28D) AUX Section: 271-0523

P18

STABILIZER CYLINDER CIRCUIT BOOM CYLINDER CIRCUIT STICK CYLINDER CIRCUIT

(27) Diff. Pres. Switch: 134-0404

AUX.

(11) MP Bucket Cylinders OPT: 134-0404

SUPPLY LINE DRAIN / RETURN LINE STEERING CYLINDER CIRCUIT LIFT CYLINDER CIRCUIT TILT CYLINDER CIRCUIT AUXILIARY CIRCUIT (LOADER VALVE)

P17

(2) Pump Gp. (Secondary): 280-7873

B

BOOSTED BRAKE OIL CIRCUIT LOAD SENSE CIRCUIT

P16

SOS

P6

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

SWING CYLINDER CIRCUIT BUCKET CYLINDER CIRCUIT E-STICK CYLINDER CIRCUIT

LOADER VALVE

AUXILIARY CIRCUIT (BACKHOE VALVE)

(5) Cooler: N/A

LINE PATTERNS

PUMP

(28E) Outlet Manifold: 269-1079

(28) Loader Vlave (2 Bank): 271-0512 (28) Loader Vlave (3 Bank): 271-0513

Pressure Line Pilot / Load Sensing Pressure Drain / Return Lines Component Group Attachment

(4) Tank Group: 245-0169

A

Air Line

CALLOUTS

(7) HMU: 297-1590 P19

YY

Taps (Pressure, Sampling,Sensor) by letter

52

Components by number

THIS SCHEMATIC IS FOR THE 450E BACKHOE LOADERS

(3) Hydraulic Tank: 272-0008

PART #: 254-0098 CHG02 VOLUME 1 OF 2

(8) Steer Cylinder: 238-5285

Components are shown installed on a fully operable machine with the key and engine off. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations

8

7

6

5

4

3

2

1

A

8

7

6

5

4

3

2

1

BOOSTED BRAKES (REF)

(15) Swing Cylinders: 297-4896 (21) Valve Gp - Cushion Relief: 283-6331 (16) Bucket Cylinder: 270-7287 (17) E-Stick Cylinder (OPT): 270-7288

TO REAR AXLE LEFT WHEEL BRAKE

F

(13) Boom Cylinder: 270-7285

(12B) RH Stabilizer Cylinder: 270-7291

(12A) LH Stabilizer Cylinder: 270-7290

(14) Stick Cylinder: 270-7286

LEFT BRAKE PEDAL

F TO REAR AXLE RIGHT WHEEL BRAKE

RIGHT BRAKE PEDAL

BS

BT

(29) Loader Vlave (7 Bank): 342-6667 (29) Loader Vlave (8 Bank): 342-6668

E

E

(29J) Outlet Manifold: 348-4585

(29A) Inlet Section: 348-4578

STAB RH

(29B) Stabilizer Section: 348-4584

D

(29C) AUX Section: 348-9819

(32) Valve - Check: 123-4750

STICK

BOOM

AUX.

(29D) Boom Section: 348-4579

BUCKET

SWING

E-STICK

(29G) Bucket Section: 348-4581

(29E) Stick Section: 348-4582

STAB LH

(29H) E-Stick Section: 348-4583

(29B) Stabilizer Section: 348-4584

(29F) Swing Section: 348-4580

*Aux Section not avalible on the 7 Bank Valve configuration.

D

(18) Pilot - Lever w/DTNT and Switch: 223-4715

(30) Valve Gp Relief: 345-7712

(25) Ride Cntrl. Pres. Switch (Opt.): 304-5696 (23) Ride Cntrl. Valve (Opt): 245-8780

C

STABILIZER JOYSTICK

C

(24) Ride Cntrl. Accmltr (Opt): 169-3960 (22) Accumulator: 226-0420

(31) Press Reducing Valve: 300-0430

T3

(28A) Inlet Section: 348-4573

T2 (20) Pilot - Manifold: 297-1590 (1) Pump Gp. (Primary): 269-9336

(28B) Lift Section: 348-4574

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

LIFT

B

(26) Temp. Sensor: 246-4297

HMU

(9) Lift Cylinders: 125-7895

IMPLEMENT and STEERING PUMP CIRCUIT PILOT OIL CIRCUIT BOOSTED BRAKE OIL CIRCUIT LOAD SENSE CIRCUIT P16

SOS

T1

P3

SUPPLY LINE DRAIN / RETURN LINE STEERING CYLINDER CIRCUIT LIFT CYLINDER CIRCUIT TILT CYLINDER CIRCUIT AUXILIARY CIRCUIT (LOADER VALVE)

(6) Filter: 307-9799

(28C) Tilt Section: 348-4575 (2 Bank) 348-4576 (3 Bank)

STABILIZER CYLINDER CIRCUIT BOOM CYLINDER CIRCUIT STICK CYLINDER CIRCUIT

P17

TILT

SWING CYLINDER CIRCUIT BUCKET CYLINDER CIRCUIT

(27) Diff. Pres. Switch: 134-0404

(10) Tilt Cylinder: 100-7844

E-STICK CYLINDER CIRCUIT AUXILIARY CIRCUIT (BACKHOE VALVE)

LINE PATTERNS Pressure Line

P18

PUMP AUX.

A

B

(11) MP Bucket Cylinders (OPT): 226-5540

(28D) AUX Section: 348-4577

(5) Cooler: N/A

Pilot / Load Sensing Pressure Drain / Return Lines

(2) Pump Gp. (Secondary): 280-7873

Component Group Attachment Air Line

LOADER VALVE

CALLOUTS

(7) HMU: 297-1590 (28) Loader Vlave (2 Bank): 342-6662 (28) Loader Vlave (3 Bank): 342-6663

YY

Taps (Pressure, Sampling,Sensor) by letter

52

Components by number

(4) Tank Group: 245-0169

P19

450E BACKHOE LOADERS (SCHEMATIC)

MEDIA NUMBER: UENR0270-01 PART NUMBER: 254-0098, CHANGE: 05, VOLUME 2 OF 2 (MECHANICAL)

(3) Hydraulic Tank: 272-0008

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

(8) Steer Cylinder: 238-5285

Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations

8

7

6

5

4

3

2

1

A

COMPONENT LOCATIONS VIEW (PILOT) VIEW ALL CALLOUTS

28

15

29 22

12

25

27 26 6

24

4

23

3

9 10

8

5

11

14 16

13 14

12

1

18

7

9

10

11

19 17

4

19

16

14

3

1

18

10

5

13 15

12

29

6

22

26 27 28

23 24 25

7

9

8

11

IMPLEMENT / STEERING PUMP VIEW (PILOT) Implement and Steering Pump

B

VIEW ALL CALLOUTS

A

Loader Valve

T2

C

H

The implement and steering pump on the 450E machines is similar to the "D" Series machines, but now includes a torque control solenoid (not visible). The torque control solenoid provides an additional pump setting. The implement and steering pump is located below the floor plate in the cab. The pump control valve (H) contains a torque control spool adjustment screw (B) and a flow compensator adjustment screw (A). The adjustment screws and the load sensing pressure tap (T2) are accessible from the cab.

D

T2 C

T1

E G

A

T2

B Drain

C D

F Drain

T1

E

These illustrations show the implement and steering pump out of the machine. The following components are visible: Torque control adjustment (A), Flow compensator adjustment (B), Load sensing pressure tap (T2), Inlet port (C), Case drain port (D), Torque control solenoid (E), Discharge pressure tap (T1), Torque limiter (F), Outlet port (G)

BOOSTED BRAKES VIEW (PILOT) To Wheel Brake

To Tank

Slave Cylinder

From Pilot Accumulator

Master Cylinder

Boost Brake Valve

This illustration shows a sectional view of the boosted brake valve group. When the brake pedal is depressed, the boost brake valve moves to the left and inlet oil from the pilot manifold is directed to the master cylinder.

A

E

D

C

B

The 450E machines are equipped with hydraulically assisted master cylinders, which decreases the amount of pedal effort when braking. This illustration shows the boosted brakes valve group, which uses oil from the pilot accumulator to add boost to the master cylinder. The hydraulic force multiplies the pedal effort so the operator can get more braking force with less effort. The brake boost valves are connected to the master cylinder (A) at each brake pedal (B). Oil enters the master cylinder through the supply hose (C) and exits the master cylinder through the return hose (D). The oil flows to the service brakes through the hoses (E) at the bottom of the master cylinder. The master cylinders can be removed from the machine from inside the operator's compartment.

BACKHOE VALVE VIEW (PILOT)

The pilot manifold can also be accessed with the floor plate removed. The pilot pressure tap (T3) is located on the pilot manifold. The pilot manifold routes pilot oil to and from the loader and backhoe pilot control valves. Pilot Manifold

T3 View of pilot controlled backhoe valve with floor plate removed.

A

N

B

C

D

E

F

G

H

I

J

L K M

EIGHT BANK VALVE (PILOT OPERATED) The 450E machines are equipped with a pilot controlled backhoe valve that is visible with the floor plate at the rear of the cab removed. This illustration shows a eight bank backhoe valve. The components in the backhoe valve are:

(A) Outlet Manifold (B) Left Stabilizer Control Valve (C) Extendable Stick Control Valve (D) Bucket Control Valve (E) Swing Control Valve (F) Stick Control Valve (G) Boom Control Valve

(H) Auxiliary Control Valve (I) Right Stabilizer Control Valve (J) Pilot On/Off Solenoid Valve (K) Inlet Manifold (L) A Ports (M) B Ports (N) Load Signal Relief Valve

Note: The auxiliary Control Valve (H) is not avalible on the optional seven bank valve.

LOADER VALVE VIEW (PILOT)

SOS

Implement and Steering Pump

Hydraulic Oil Filter

Loader Valve

C

D

B

E

A

B

C

D

P E

R

M J THREE BANK VALVE:

K

N

The 450E machines are equipped with a mechanically controlled loader valve as shown in this illustration. The loader valve is accessed from below the floor plate. The loader control valve group contains:

View of mechanically controlled loader valve with floor plate removed.

(A) Outlet manifold. (B) Auxiliary control valve. (C) Tilt control valve. (D) Lift control valve. (E) Inlet manifold. (F) Load signal relief valve.

(J) Makeup and relief valve. (K) Magnetic detent for return to dig function. (M) Priority Valve. (N) Mechanical detent for the float. (P) A ports. (R) B ports.

F

HYDRAULIC OIL FILTER VIEW VIEW ALL CALLOUTS

The hydraulic oil filter is located below the machine at the left frame rail. The hydraulic oil filter bypass switch is mounted to the oil filter base.

Temp Sensor SOS Filter Bypass Switch

SOS

Filter Bypass Switch

Temp Sensor

RIDE CONTROL VIEW (PILOT)

B A

Travel at high speeds over rough terrain causes bucket movement. The optional Ride Control System acts as a shock absorber by absorbing bucket forces, which stabilize the machine. The Ride Control System components include; ride control relay (A), ride control solenoids (B), ride control accumulator (C), and ride control pressure switch (D). Two solenoids are now used on the "E" Series machines Ride Control System.

D

C

The Ride Control System, on machines with the optional autoshift transmission, is controlled by the Machine ECM. The Machine ECM monitors the position of the ride control switch and determines when to operate the ride control system.

ECM

COMPONENT LOCATIONS VIEW (MECHANICAL) VIEW ALL CALLOUTS

28

15

29 22

12

25

27 26 6

24

4

23

3

9 10

8

5

11

14 16

13 14

12

1

18

7

9

10

11

4

17 16

14

3

1

18

10

5

13 15

12

29

6

22

26 27 28

23 24 25

7

9

8

11

IMPLEMENT / STEERING PUMP VIEW (MECHANICAL) Implement and Steering Pump

B

VIEW ALL CALLOUTS

A

Loader Valve

T2

C

H

The implement and steering pump on the 450E machines is similar to the "D" Series machines, but now includes a torque control solenoid (not visible). The torque control solenoid provides an additional pump setting. The implement and steering pump is located below the floor plate in the cab. The pump control valve (H) contains a torque control spool adjustment screw (B) and a flow compensator adjustment screw (A). The adjustment screws and the load sensing pressure tap (T2) are accessible from the cab.

D

T2 C

T1

E G

A

T2

B Drain

C D

F Drain

T1

E

These illustrations show the implement and steering pump out of the machine. The following components are visible: Torque control adjustment (A), Flow compensator adjustment (B), Load sensing pressure tap (T2), Inlet port (C), Case drain port (D), Torque control solenoid (E), Discharge pressure tap (T1), Torque limiter (F), Outlet port (G)

BOOSTED BRAKES VIEW (MECHANICAL) To Wheel Brake

To Tank

Slave Cylinder

From Pilot Accumulator

Master Cylinder

Boost Brake Valve

This illustration shows a sectional view of the boosted brake valve group. When the brake pedal is depressed, the boost brake valve moves to the left and inlet oil from the pilot manifold is directed to the master cylinder.

A

E

D

C

B

The 450E machines are equipped with hydraulically assisted master cylinders, which decreases the amount of pedal effort when braking. This illustration shows the boosted brakes valve group, which uses oil from the pilot accumulator to add boost to the master cylinder. The hydraulic force multiplies the pedal effort so the operator can get more braking force with less effort. The brake boost valves are connected to the master cylinder (A) at each brake pedal (B). Oil enters the master cylinder through the supply hose (C) and exits the master cylinder through the return hose (D). The oil flows to the service brakes through the hoses (E) at the bottom of the master cylinder. The master cylinders can be removed from the machine from inside the operator's compartment.

BACKHOE VALVE VIEW (MECHANICAL)

The pilot manifold can also be accessed with the floor plate removed. The pilot pressure tap (T3) is located on the pilot manifold. The pilot manifold routes pilot oil to and from the loader and backhoe pilot control valves. Pilot Manifold

T3 View of pilot controlled backhoe valve with floor plate removed.

A

N

B

C

D

E

F

G

H

I

J

L K M

EIGHT BANK VALVE (PILOT OPERATED) The 450E machines are equipped with a pilot controlled backhoe valve that is visible with the floor plate at the rear of the cab removed. This illustration shows a eight bank backhoe valve. The components in the backhoe valve are:

(A) Outlet Manifold (B) Left Stabilizer Control Valve (C) Extendable Stick Control Valve (D) Bucket Control Valve (E) Swing Control Valve (F) Stick Control Valve (G) Boom Control Valve

(H) Auxiliary Control Valve (I) Right Stabilizer Control Valve (J) Pilot On/Off Solenoid Valve (K) Inlet Manifold (L) A Ports (M) B Ports (N) Load Signal Relief Valve

Note: The auxiliary Control Valve (H) is not avalible on the optional seven bank valve.

LOADER VALVE VIEW (MECHANICAL)

SOS

Implement and Steering Pump

Hydraulic Oil Filter

Loader Valve

C

D

B

E

A

B

C

D

P E

R

M J THREE BANK VALVE:

K

N

The 450E machines are equipped with a mechanically controlled loader valve as shown in this illustration. The loader valve is accessed from below the floor plate. The loader control valve group contains:

View of mechanically controlled loader valve with floor plate removed.

(A) Outlet manifold. (B) Auxiliary control valve. (C) Tilt control valve. (D) Lift control valve. (E) Inlet manifold. (F) Load signal relief valve.

(J) Makeup and relief valve. (K) Magnetic detent for return to dig function. (M) Priority Valve. (N) Mechanical detent for the float. (P) A ports. (R) B ports.

F

HYDRAULIC OIL FILTER VIEW VIEW ALL CALLOUTS

The hydraulic oil filter is located below the machine at the left frame rail. The hydraulic oil filter bypass switch is mounted to the oil filter base.

Temp Sensor SOS Filter Bypass Switch

SOS

Filter Bypass Switch

Temp Sensor

RIDE CONTROL VIEW (MECHANICAL)

B A

Travel at high speeds over rough terrain causes bucket movement. The optional Ride Control System acts as a shock absorber by absorbing bucket forces, which stabilize the machine. The Ride Control System components include; ride control relay (A), ride control solenoids (B), ride control accumulator (C), and ride control pressure switch (D). Two solenoids are now used on the "E" Series machines Ride Control System.

D

C

The Ride Control System, on machines with the optional autoshift transmission, is controlled by the Machine ECM. The Machine ECM monitors the position of the ride control switch and determines when to operate the ride control system.

ECM