Retroexcavadora 450 e

(1)

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INTERACTIVE SCHEMATIC

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Cover Page Tables Schematic Machine Views Component Connector Chassis View Cab View Engine View Features Options Bookmarks X EC-C3 EC-C2 _E-C60 EC-C1 E-C61

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FUNCTION

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Pressure

Switch TemperatureSwitch SwitchLevel SwitchFlow Circuit Breaker T ELECTRICAL SYMBOLS Spring (Adjustable) Variability Fluid Conditioner Pump or Motor BASIC HYDRAULIC COMPONENT SYMBOLS

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SCHEMATIC SYMBOLS AND DEFINITIONS

HYDRAULIC SYMBOLS - ELECTRICAL

Transducer

(Fluid) Transducer(Gas / Air)

G Generator Electrical Wire Pressure Switch

M

Electric

Motor Pressure Switch (Adjustable) TemperatureSwitch

Pressure

Switch TemperatureSwitch SwitchLevel SwitchFlow Circuit Breaker

T

ELECTRICAL SYMBOLS

Spring

Control Valves

Restriction Line Restriction_(Fixed)

2-Section Pump MAIN AUX. Spring (Adjustable) Variability Line Restriction (Variable) Pressure Compensation

Pump: Variable and Pressure Compensated Hydraulic Pneumatic Energy Triangles Fluid Conditioner Attachment Pump or Motor

BASIC HYDRAULIC

COMPONENT SYMBOLS

Line Restriction Variable and Pressure

Compensated

Vented Pressurized Return Above Fluid Level Return Below Fluid Level

FLUID STORAGE RESERVOIRS

Pressure Temperature Flow

MEASUREMENT

Unidirectional Bidirectional

ROTATING SHAFTS

One Position Two Position Three Position

Two-way Three-Way Four-Way ENVELOPES

PORTS

CONTROL

Basic

Symbol LoadedSpring Normal Position

A B P T

Shifted Position Infinite Position

Shuttle Pilot Controlled

VALVES

CHECK

Solenoid

or Manual Solenoidand Pilot Pilot or ManualSolenoid and

Solenoid Servo Thermal Detent

COMBINATION CONTROLS

T

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

The grounded wire is fastened to the machine.

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

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. 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.

BASIC ELECTRICAL COMPONENT SYMBOLS

Push-pull Lever Manual Shutoff General Manual Push Button Pedal Spring

MANUAL CONTROL

External Return Internal Return

Simplified Complete _{Supply Pressure}Internal RELEASED PRESSURE

REMOTE SUPPLY PRESSURE

PILOT CONTROL

Spring Loaded Gas Charged

ACCUMULATORS

Crossing Joining

LINES

Double Acting Single Acting

CYLINDERS

Unidirectional Bidirectional FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON- COMPENSATED

PUMPS

Unidirectional Bidirectional Unidirectional Bidirectional FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON- COMPENSATED

MOTORS

Unidirectional Bidirectional Two Position Infinite Positioning FLOW IN ONE

DIRECTION FLOW ALLOWED INEITHER DIRECTION

Three Position CROSS FLOW PARALLEL FLOW

INTERNAL PASSAGEWAYS

1 2 AG-C4 111-7898 L-C123E-5179

9X-1123 Component_{Part Number}

Pin or Socket Number Part Number: for

Connector Plug

Harness Identification Letter(s): (A, B, C, AA, AB, AC, ...) Plug 325-AG135 PK-14 Wire Color Wire Gauge Receptacle 1 1 2 2

Sure-Seal connector: Typical representation

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

Deutsch connector: Typical representation

of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins. Fuse (5 Amps)

5A

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

L-C12 3E-5179

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

Harness Connector Serialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness (C1, C2, C3, ...)

(3)

Volume 1 of 2: Pilot (Center Pivot)

UENR0270-01

November 2012

450E Backhoe Loader

Hydraulic System

RBA1-UP

LYR1-UP

(4)

COMPONENT TABLE (PILOT)

Left Hand Right Hand Left Hand Right Hand

Description

1 PUMP GP. (Primary) 269-9336 2 PUMP GP. (Secondary) 280-7873 4 TANK GROUP 245-0169 5 COOLER N/A 6 FILTER 359-7232 7 HMU 270-1590 8 STEER CYLNDER 9 LIFT CYLNDER 10 TILT CYLNDER 375-0716 11

MP BUCKET CYLNDER (OPT)

12A STABILIZER CYLINDERS 375-0721 12B 375-0722 13 BOOM CYLINDER 375-0723 14 STICK CYLNDER 375-0718 15 SWING CYLNDER 297-4896 16 BUCKET CYLNDER 375-0719 17

E-STICK CYLNDER (OPT). 375-0720

18

PILOT - LEVER W/DTNT & SWTCH 359-7248

19

PILOT 267-2758

22

ACCUMULATOR 226-0420

23

RIDE CNTRL VALVE (OPT) 245-8780

24

RIDE CNTRL ACCMLTR (OPT) 345-3672

25

RIDE CNTR PRES. SWTCH (OPT) 304-5696

26

TEMP. SENSOR 246-4297

27

DIFF. PRES. SWITCH 134-0404

2 BANK 271-0512 3 BANK 271-0513 28A INLET SECTION 343-7137 28B LIFT SECTION 271-0521 28C TILT SECTION 271-0522 28D AUX SECTION 271-0523 28E OUTLET MANIFOLD 269-1079 7 BANK 271-0527 8 BANK 271-0528 29A INLET SECTION 341-4726 29B STABILIZER SECTION 271-0541 29C AUX SECTION 271-0547 29D BOOM SECTION 271-0542 29E STICK SECTION 341-8185 29F SWING SECTION 271-0544 29G BUCKET SECTION 271-0545 29H E-STICK SECTION 271-0546 29J OUTLET MANIFOLD 29K

PATTERN SWITCHING VALVE 299-9072

21

VALVE GP - CUSHION RELIEF 283-6331

30 VALVE GP - RELIEF 260-3022 20 MANIFOLD - PILOT 268-0094 226-5540 238-5285 375-0717

COMPONENT LIST (PILOT)

3 HYDRAULIC TANK 272-0008 2 BANK 3 BANK 271-0522 271-0539 31

PRESSURE REUDCING VALVE 300-0430

Machine

Location

Part

Number

Schematic

Location

B-4 B-3 A-3 A-3 B-2 A-5 A-6 C-8 B-8 B-8 F-3 F-7 F-6 F-5 F-5 F-4 F-4 C-5 C-4 E-7 D-8 D-8 D-8 B-3 B-3 C-7 C-7 B-7 B-7 28E E-7 E-3 E-6 E-6 E-5 E-5 E-4 E-3 E-2 E-5 F-4 E-2 C-6 A-3 E-7

VALVE GROUP ( 2-BANK)

LOADER VALVE (ST) BACKHOE VALVE 28 28 A-7, C-7 A-7, C-7 29 29 F-7, F-2 F-7, F-2 29B 271-0541 E-7

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COMPONENT TABLE (MECHANICAL)

Left Hand Right Hand Left Hand Right Hand

Description

1 PUMP GP. (Primary) 269-9336 2 PUMP GP. (Secondary) 280-7873 4 TANK GROUP 245-0169 5 COOLER N/A 6 FILTER 307-9799 7 HMU 297-1590 8 STEER CYLINDER 9 LIFT CYLINDER 10 TILT CYLINDER 100-7844 11

MP BUCKET CYLINDER (OPT)

12A 270-7290 12B STABILIZER CYLNDERS 270-7291 13 BOOM CYLINDER 270-7285 14 STICK CYLINDER 270-7286 15 SWING CYLINDER 297-4896 16 BUCKET CYLINDER 270-7287 17

E-STICK CYLINDER (OPT). 270-7288

VALVE GROUP ( 2-BANK)

18

PILOT - LEVER W/DTNT & SWTCH 223-4715

22

ACCUMULATOR 226-0420

23

RIDE CNTRL VALVE (OPT) 245-8780

24

RIDE CNTRL ACCMLTR (OPT) 162-3960

25

RIDE CNTR PRES. SWTCH (OPT) 304-5696

26

TEMP. SENSOR 246-4297

27

DIFF. PRES. SWITCH 134-0404

LOADER VALVE (ST) 2 BANK 3 BANK 28A INLET SECTION 28B LIFT SECTION 28C TILT SECTION 28D AUX SECTION BACKHOE VALVE 7 BANK 8 BANK 29A INLET SECTION 29B STABILIZER SECTION 29C AUX SECTION 29D BOOM SECTION 29E STICK SECTION 29F SWING SECTION 29G BUCKET SECTION 29H E-STICK SECTION 29J OUTLET MANIFOLD 21

VALVE GP - CUSHION RELIEF 283-6331

30 VALVE GP - RELIEF 345-7712 32 VALVE - CHECK 20 MANIFOLD - PILOT 268-0094 226-5540 238-5285 125-7895

COMPONENT LIST (MECHANICAL)

3

HYDRAULIC TANK 272-0008

2 BANK 3 BANK

31

PRESSURE REUDCING VALVE 300-0430 342-6667 342-6668 348-4584 348-9819 348-4579 348-4582 348-4580 348-4581 348-4583 348-4578 348-4585

Machine

Location

Part

Number

Schematic

Location

B-4 B-3 A-3 A-3 B-2 A-6 A-6 B-8 B-8 A-8 F-3 F-7 F-6 F-5 F-4 F-4 F-3 D-4 C-5 C-8 C-8 C-8 B-3 B-3 C-7 B-7 B-7 A-7 E-8 E-3 E-6 E-6 E-5 E-4 E-4 E-3 E-2 F-4 D-2 D-7 B-5 A-3 C-5 342-6662 342-6663 348-4573 348-4574 348-4575 348-4577 348-4576 123-4750 29B 348-4584 E-7 28 28 A-8, C-8 A-8, C-8 29 29 E-8, E-2 E-8, E-2

(6)

TAP TABLE (PILOT)

Tap

Description

T1

Pump Discharge

T2

Load Sense

SOS

Oil Sampling

TAP LOCATIONS

(7)

TAP TABLE (MECHANICAL)

Tap

Description

T1

Pump Discharge

T2

Load Sense

SOS

Oil Sampling

TAP LOCATIONS

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1

2

3

4

5

6

7

8 A

B

C

D

E

F

1

2

3

4

5

6

7

8 A

B

C

D

E

F

LINE PATTERNS

Drain / Return Lines Component Group

Pilot / Load Sensing Pressure Pressure Line

Attachment Air Line

CALLOUTS

Taps (Pressure, Sampling,Sensor) by letter

Components by number

YY

52

DRAIN / RETURN LINE

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

IMPLEMENT and STEERING PUMP CIRCUIT

SWING CYLINDER CIRCUIT STEERING CYLINDER CIRCUIT PILOT OIL CIRCUIT

BUCKET CYLINDER CIRCUIT STICK CYLINDER CIRCUIT LOAD SENSE CIRCUIT SUPPLY LINE

AUXILIARY CIRCUIT (BACKHOE VALVE) E-STICK CYLINDER CIRCUIT

BOOM CYLINDER CIRCUIT STABILIZER CYLINDER CIRCUIT BOOSTED BRAKE OIL CIRCUIT

LIFT CYLINDER CIRCUIT TILT CYLINDER CIRCUIT

AUXILIARY CIRCUIT (LOADER VALVE)

THIS SCHEMATIC IS FOR THE 450E BACKHOE LOADERS

PART #: 254-0098 CHG02 VOLUME 1 OF 2

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 NOTE: Aux Section

not avalible on the 7 Bank Valve

STAB RH

BOOM

STICK

SWING

BUCKET

E-STICK

STAB LH

PUMP

BACKHOE VALVE

AUX.

TILT

LIFT

LOADER VALVE

LEFT JOYSTICK

RIGHT JOYSTICK

STABILIZER JOYSTICK

BOOSTED BRAKES (REF)

BS BT LEFT BRAKE PEDAL RIGHT BRAKE PEDAL TO REAR AXLE LEFT WHEEL BRAKE

TO REAR AXLE RIGHT WHEEL BRAKE

DEL

T3

T2

T1

SOS

AUX.

P16 P17 P18 P2 P1 P20 P7 P14 P8 P13 P11 P12 P10 P9 P15 P7 PR1 P6 P5 P4 P1

HMU

P3 P19 (1) Pump Gp. (Primary): 269-9336 (2) Pump Gp. (Secondary): 280-7873 (3) Hydraulic Tank: 272-0008 (4) Tank Group: 245-0169 (5) Cooler: N/A (6) Filter: 307-9799 (26) Temp. Sensor: 246-4297

(27) Diff. Pres. Switch: 134-0404 (19) Pilot: 267-2758

(8) Steer Cylinder: 238-5285

(7) HMU: 297-1590 (28) Loader Vlave (2 Bank): 271-0512

(28) Loader Vlave (3 Bank): 271-0513 (11) MP Bucket Cylinders

OPT: 134-0404 (10) Tilt Cylinder: 100-7844

(9) Lift CylinderS: 125-7895 (25) Ride Cntrl.

Pres. Switch (Opt.): 304-5696 (24) Ride Cntrl. Accmltr (Opt): 169-3960

(23) Ride Cntrl. Valve (Opt): 245-8780

(28E) Outlet Manifold: 269-1079 (28D) AUX Section: 271-0523 (28C) Tilt Section: 271-0522 (28B) Lift Section: 271-0521

(28A) Inlet Section: 271-0520

(29A) Inlet Section:

341-4726 (29B) Stabilizer Section:271-0541 (29C) AUX Section:271-0547 (29D) Boom Section:271-0542 _{(30) Valve Gp}

-Relief: 260-3022 (29K) Boom Section: 299-9072 (29F) Swing Section: 271-0544 (29G) Bucket Section: 271-0545 (29H) E-Stick Section:_271-0546 (29B) Stabilizer Section: 271-0541 (29J) Outlet Manifold: 271-0539

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

(29) Loader Vlave (8 Bank): 271-0528 (22) Accumulator:

226-0420

(31) Press Reducing Valve: 300-0430

(13) Boom Cylinder: 270-7285

(12B) RH Stabilizer Cylinder: 270-7291 (14) Stick Cylinder: 270-7286

(15) Swing Cylinders: 297-4896

(17) E-Stick Cylinder: 270-7288 (16) Bucket Cylinder: 270-7287

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

(12A) LH Stabilizer Cylinder: 270-7290

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

(9)

1

2

3

4

5

6

7

8 A

B

C

D

E

F

1

2

3

4

5

6

7

8 A

B

C

D

E

F

450E BACKHOE LOADERS (SCHEMATIC)

MEDIA NUMBER: UENR0270-01

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

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

LINE PATTERNS

Drain / Return Lines Component Group

Pilot / Load Sensing Pressure Pressure Line

Attachment Air Line

CALLOUTS

Taps (Pressure, Sampling,Sensor) by letter

Components by number

YY

52

DRAIN / RETURN LINE

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

IMPLEMENT and STEERING PUMP CIRCUIT

SWING CYLINDER CIRCUIT STEERING CYLINDER CIRCUIT PILOT OIL CIRCUIT

BUCKET CYLINDER CIRCUIT STICK CYLINDER CIRCUIT LOAD SENSE CIRCUIT SUPPLY LINE

AUXILIARY CIRCUIT (BACKHOE VALVE) E-STICK CYLINDER CIRCUIT

BOOM CYLINDER CIRCUIT STABILIZER CYLINDER CIRCUIT BOOSTED BRAKE OIL CIRCUIT

LIFT CYLINDER CIRCUIT TILT CYLINDER CIRCUIT

AUXILIARY CIRCUIT (LOADER VALVE)

HMU

PUMP

STABILIZER JOYSTICK

BOOSTED BRAKES (REF)

BS BT LEFT BRAKE PEDAL RIGHT BRAKE PEDAL TO REAR AXLE LEFT WHEEL BRAKE

TO REAR AXLE RIGHT WHEEL BRAKE

T3

T2

T1

SOS

P17 P18 P16 P3 P19

AUX.

TILT

LIFT

LOADER VALVE

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

STAB RH

AUX.

BOOM

STICK

SWING

BUCKET

E-STICK

STAB LH

(29E) Stick Section: 348-4582

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

(22) Accumulator: 226-0420 _{(31) Press Reducing Valve:}_300-0430

(13) Boom Cylinder: 270-7285

(12B) RH Stabilizer Cylinder: 270-7291 (14) Stick Cylinder: 270-7286

(15) Swing Cylinders: 297-4896

(17) E-Stick Cylinder (OPT): 270-7288

(16) Bucket Cylinder: 270-7287

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

(12A) LH Stabilizer Cylinder: 270-7290

(11) MP Bucket Cylinders (OPT): 226-5540 (10) Tilt Cylinder: 100-7844 (9) Lift Cylinders: 125-7895 (25) Ride Cntrl.

Pres. Switch (Opt.): 304-5696

(24) Ride Cntrl. Accmltr (Opt): 169-3960 (23) Ride Cntrl. Valve (Opt): 245-8780 (28D) AUX Section: 348-4577 (28C) Tilt Section: 348-4575 (2 Bank) 348-4576 (3 Bank) (28B) Lift Section: 348-4574

348-4573 (3) Hydraulic Tank: 272-0008 (4) Tank Group: 245-0169 (8) Steer Cylinder: 238-5285 (7) HMU: 297-1590 (2) Pump Gp. (Secondary): 280-7873 (5) Cooler: N/A (6) Filter: 307-9799 (26) Temp. Sensor: 246-4297

(27) Diff. Pres. Switch:

134-0404

348-4578 (29B) Stabilizer Section: 348-4584 (29C) AUX Section: 348-9819 (29D) Boom Section: 348-4579 (30) Valve Gp -Relief: 345-7712 (29F) Swing Section: 348-4580

(29G) Bucket Section: 348-4581 (29H) E-Stick Section: 348-4583 (29B) Stabilizer Section: 348-4584 (29J) Outlet Manifold: 348-4585 (32) Valve - Check: 123-4750 (1) Pump Gp. (Primary): 269-9336

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

(10)

COMPONENT LOCATIONS VIEW (PILOT)

29

28

27

26

25

24

23

22

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

1

(11)

IMPLEMENT / STEERING PUMP VIEW (PILOT)

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

adjust-ment screw (A). The adjustadjust-ment screws and the load sensing pressure tap (T2) are accessible

from the cab.

These illustrations show the implement and steering pump out of the machine. The following compo-nents 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)

Implement and

Steering Pump

Loader Valve

Drain Drain G A B E F D C D E C

A

B

C

T2

_H

T2

T1

(12)

BOOSTED BRAKES VIEW (PILOT)

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.

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.

To Wheel

Brake

Boost Brake

Valve

From Pilot

Accumulator

To Tank

Master

Cylinder

Slave

Cylinder

A

E

D

C

B

(13)

BACKHOE VALVE VIEW (PILOT)

(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

A B C D E F G H I

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:

J

K

EIGHT BANK VALVE (PILOT OPERATED)

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

View of pilot controlled backhoe valve with floor plate removed.

(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

L

M N

Note: The auxiliary Control Valve (H) is not avalible on the optional seven bank valve. T3

(14)

LOADER VALVE VIEW (PILOT)

E

D

C

B

A

F

B

C

D

J

K

M

P

R

N

E

Implement and

Steering Pump

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:

E

D

C

B

A

F

View of mechanically controlled loader valve with floor plate removed.

Loader Valve

B

C

D

THREE BANK VALVE:

J

K

M

P

R

N

E

(A) Outlet manifold.

(B) Auxiliary control valve.

(J) Makeup and relief valve.

(C) Tilt control valve.

(D) Lift control valve.

(E) Inlet manifold.

(M) Priority Valve.

(F) Load signal relief valve.

(N) Mechanical detent for the

float. (P) A ports.

(R) B ports.

Hydraulic Oil Filter

(K) Magnetic detent for return

to dig function.

(15)

HYDRAULIC OIL FILTER VIEW

Filter Bypass Switch Temp Sensor

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.

Filter Bypass Switch Temp Sensor SOS SOS SOS

(16)

RIDE CONTROL VIEW (PILOT)

B

A

C

D

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.

The Ride Control System, on machines with the optional autoshift trans-mission, 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.

B

A

C

D

(17)

COMPONENT LOCATIONS VIEW (MECHANICAL)

29

28

27

26

25

24

23

22

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

1

(18)

IMPLEMENT / STEERING PUMP VIEW (MECHANICAL)

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

adjust-ment screw (A). The adjustadjust-ment screws and the load sensing pressure tap (T2) are accessible

from the cab.

These illustrations show the implement and steering pump out of the machine. The following compo-nents 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)

Implement and

Steering Pump

Loader Valve

Drain Drain G A B E F D C D E C

A

B

C

T2

_H

T2

T1

(19)

BOOSTED BRAKES VIEW (MECHANICAL)

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.

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.

To Wheel

Brake

Boost Brake

Valve

From Pilot

Accumulator

To Tank

Master

Cylinder

Slave

Cylinder

A

E

D

C

B

(20)

BACKHOE VALVE VIEW (MECHANICAL)

(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

A B C D E F G H I

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:

J

K

EIGHT BANK VALVE (PILOT OPERATED)

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

View of pilot controlled backhoe valve with floor plate removed.

(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

L

M N

Note: The auxiliary Control Valve (H) is not avalible on the optional seven bank valve. T3

(21)

LOADER VALVE VIEW (MECHANICAL)

E

D

C

B

A

F

B

C

D

J

K

M

P

R

N

E

Implement and

Steering Pump

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:

E

D

C

B

A

F

View of mechanically controlled loader valve with floor plate removed.

Loader Valve

B

C

D

THREE BANK VALVE:

J

K

M

P

R

N

E

(A) Outlet manifold.

(B) Auxiliary control valve.

(J) Makeup and relief valve.

(C) Tilt control valve.

(D) Lift control valve.

(E) Inlet manifold.

(M) Priority Valve.

(F) Load signal relief valve.

(N) Mechanical detent for the

float. (P) A ports.

(R) B ports.

Hydraulic Oil Filter

(K) Magnetic detent for return

to dig function.

(22)

HYDRAULIC OIL FILTER VIEW

Filter Bypass Switch Temp Sensor

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.

Filter Bypass Switch Temp Sensor SOS SOS SOS

(23)

RIDE CONTROL VIEW (MECHANICAL)

B

A

C

D

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.

The Ride Control System, on machines with the optional autoshift trans-mission, 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.