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INTERACTIVE SCHEMATIC

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Cover PageTables

SchematicMachine Views

ComponentConnector

Chassis View

Cab View

Engine View

Features

Options

Bookmarks X

EC-C3EC-C2 E-C60

EC-C1

E-C61

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FUNCTION Zoom In

HOTKEYS (Keyboard Shortcuts)

Zoom OutFit to PageHand Tool

CTRL / +

KEYS

CTRL / -CTRL / 0 (zero)SPACEBAR (hold down)

Find CTRL / F

PressureSwitch

TemperatureSwitch

LevelSwitch

FlowSwitch Circuit Breaker

T

ELECTRICAL SYMBOLS

Spring(Adjustable)

Variability

FluidConditioner

Pumpor Motor

BASIC HYDRAULICCOMPONENT SYMBOLS

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SCHEMATIC SYMBOLS AND DEFINITIONS

HYDRAULIC SYMBOLS - ELECTRICAL

Transducer(Fluid)

Transducer(Gas / Air)

G

Generator ElectricalWire

Pressure Switch

MElectricMotor

Pressure Switch (Adjustable)

TemperatureSwitch

PressureSwitch

TemperatureSwitch

LevelSwitch

FlowSwitch Circuit Breaker

T

ELECTRICAL SYMBOLS

Spring

ControlValves

Restriction Line Restriction(Fixed)

2-SectionPump

MAIN AUX.

Spring(Adjustable)

Variability

Line Restriction(Variable)

PressureCompensation

Pump: Variable andPressure Compensated

Hydraulic PneumaticEnergy Triangles

FluidConditioner

Attachment

Pumpor Motor

BASIC HYDRAULICCOMPONENT SYMBOLS

Line RestrictionVariable 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

BasicSymbol

SpringLoaded

Normal Position

A B

P T

A B

P TShifted Position Infinite Position

Shuttle PilotControlled

VALVES

CHECK

Solenoidor Manual

Solenoidand Pilot

Solenoid and Pilot or Manual

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 indicatesthat 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 ofa 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 PedalGeneral Manual Push Button SpringManual Shutoff

MANUAL CONTROL

External Return Internal Return

Simplified CompleteInternal

Supply Pressure

RELEASED PRESSURE

REMOTE SUPPLY PRESSURE

PILOT CONTROL

Spring Loaded Gas Charged

ACCUMULATORS

Crossing Joining

LINES

Double ActingSingle Acting

CYLINDERSUnidirectional

Bidirectional

FIXED DISPLACEMENT

VARIABLE DISPLACEMENTNON- COMPENSATED

PUMPS

Unidirectional

Bidirectional

Unidirectional

Bidirectional

FIXED DISPLACEMENT

VARIABLE DISPLACEMENTNON- COMPENSATED

MOTORS

Unidirectional

Bidirectional

TwoPosition

InfinitePositioning

FLOW IN ONEDIRECTION

FLOW ALLOWED INEITHER DIRECTION

ThreePosition

CROSSFLOW

PARALLELFLOW

INTERNAL PASSAGEWAYS

1

2

AG-C4111-7898

L-C123E-5179

9X-1123 ComponentPart Number

Pin or Socket Number

Part Number: forConnector Plug

Harness Identification Letter(s): (A, B, C, AA, AB, AC, ...)

Plug

325-AG135 PK-14

Wire ColorWire Gauge

Receptacle

1

12

2Sure-Seal connector: Typical representationof a Sure-Seal connector. The plug and receptacle contain both pins and sockets.

Deutsch connector: Typical representationof 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-C123E-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, ...)

HARNESS AND WIRE SYMBOLS

Volume 1 of 2: Pilot (Center Pivot)

UENR0270-01November 2012

450E Backhoe LoaderHydraulic SystemRBA1-UPLYR1-UP

Volume 2 of 2: Mechanical (Center Pivot)

COMPONENT TABLE (PILOT)

Left Hand

Right Hand

Left Hand

Right Hand

Description

1PUMP GP. (Primary) 269-9336

2PUMP GP. (Secondary) 280-7873

4TANK GROUP 245-0169

5COOLER N/A

6FILTER 359-7232

7HMU 270-1590

8STEER CYLNDER

9LIFT CYLNDER

10TILT CYLNDER 375-0716

11MP BUCKET CYLNDER (OPT)

12ASTABILIZER CYLINDERS

375-0721

12B375-0722

13BOOM CYLINDER 375-072314STICK CYLNDER 375-0718

15SWING CYLNDER 297-4896

16BUCKET CYLNDER 375-0719

17E-STICK CYLNDER (OPT). 375-0720

18PILOT - LEVER W/DTNT & SWTCH 359-7248

19PILOT 267-2758

22ACCUMULATOR 226-0420

23RIDE CNTRL VALVE (OPT) 245-8780

24RIDE CNTRL ACCMLTR (OPT) 345-3672

25RIDE CNTR PRES. SWTCH (OPT) 304-5696

26TEMP. SENSOR 246-4297

27DIFF. PRES. SWITCH 134-0404

2 BANK 271-0512

3 BANK 271-0513

28AINLET SECTION 343-7137

28BLIFT SECTION 271-0521

28CTILT SECTION271-0522

28DAUX SECTION 271-0523

28EOUTLET MANIFOLD 269-1079

7 BANK 271-0527

8 BANK 271-0528

29AINLET SECTION 341-4726

29BSTABILIZER SECTION

271-0541

29CAUX SECTION 271-0547

29DBOOM SECTION 271-0542

29ESTICK SECTION 341-8185

29FSWING SECTION 271-0544

29GBUCKET SECTION 271-0545

29HE-STICK SECTION 271-0546

29JOUTLET MANIFOLD

29KPATTERN SWITCHING VALVE 299-9072

21VALVE GP - CUSHION RELIEF 283-6331

30VALVE GP - RELIEF 260-3022

20MANIFOLD - PILOT 268-0094

226-5540

238-5285375-0717

COMPONENT LIST (PILOT)

3HYDRAULIC TANK 272-0008

2 BANK3 BANK 271-0522

271-0539

31PRESSURE REUDCING VALVE 300-0430

MachineLocation

PartNumber

SchematicLocation

B-4

B-3

A-3

A-3

B-2

A-5

A-6

C-8

B-8

B-8

F-3

F-7F-6F-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-728E

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

29B271-0541 E-7

COMPONENT TABLE (MECHANICAL)

Left Hand

Right Hand

Left Hand

Right Hand

Description

1PUMP GP. (Primary) 269-9336

2PUMP GP. (Secondary) 280-7873

4TANK GROUP 245-0169

5COOLER N/A

6FILTER 307-9799

7HMU 297-1590

8STEER CYLINDER

9LIFT CYLINDER

10TILT CYLINDER 100-7844

11MP BUCKET CYLINDER (OPT)

12A270-7290

12BSTABILIZER CYLNDERS

270-7291

13BOOM CYLINDER 270-728514STICK CYLINDER 270-7286

15SWING CYLINDER 297-4896

16BUCKET CYLINDER 270-7287

17E-STICK CYLINDER (OPT). 270-7288

VALVE GROUP ( 2-BANK)18PILOT - LEVER W/DTNT & SWTCH 223-4715

22ACCUMULATOR 226-0420

23RIDE CNTRL VALVE (OPT) 245-8780

24RIDE CNTRL ACCMLTR (OPT) 162-3960

25RIDE CNTR PRES. SWTCH (OPT) 304-5696

26TEMP. SENSOR 246-4297

27DIFF. PRES. SWITCH 134-0404

LOADER VALVE (ST)

2 BANK

3 BANK

28AINLET SECTION

28BLIFT SECTION

28CTILT SECTION

28DAUX SECTION

BACKHOE VALVE

7 BANK

8 BANK

29AINLET SECTION

29BSTABILIZER SECTION

29CAUX SECTION

29DBOOM SECTION

29ESTICK SECTION

29FSWING SECTION

29GBUCKET SECTION

29HE-STICK SECTION

29JOUTLET MANIFOLD

21VALVE GP - CUSHION RELIEF 283-6331

30VALVE GP - RELIEF 345-7712

32VALVE - CHECK

20MANIFOLD - PILOT 268-0094

226-5540

238-5285125-7895

COMPONENT LIST (MECHANICAL)

3HYDRAULIC TANK 272-0008

2 BANK3 BANK

31PRESSURE 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

MachineLocation

PartNumber

SchematicLocation

B-4

B-3

A-3

A-3

B-2

A-6

A-6

B-8

B-8

A-8

F-3

F-7F-6F-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

29B348-4584 E-7

28

28

A-8, C-8

A-8, C-8

29

29

E-8, E-2

E-8, E-2

TAP TABLE (PILOT)

Tap DescriptionT1 Pump DischargeT2 Load Sense

SOS Oil Sampling

TAP LOCATIONS

T3 Pilot Pressure

TAP TABLE (MECHANICAL)

Tap DescriptionT1 Pump DischargeT2 Load Sense

SOS Oil Sampling

TAP LOCATIONS

T3 Pilot Pressure

12345678

A

B

C

D

E

F

12345678

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 DESCRIPTIONSIMPLEMENT and STEERING PUMP CIRCUIT

SWING CYLINDER CIRCUIT

STEERING CYLINDER CIRCUIT

PILOT OIL CIRCUIT

BUCKET CYLINDER CIRCUIT

STICK CYLINDER CIRCUIT

LOAD SENSE CIRCUITSUPPLY LINE

AUXILIARY CIRCUIT (BACKHOE VALVE)E-STICK CYLINDER CIRCUIT

BOOM CYLINDER CIRCUITSTABILIZER CYLINDER CIRCUIT

BOOSTED BRAKE OIL CIRCUIT

LIFT CYLINDER CIRCUITTILT CYLINDER CIRCUITAUXILIARY CIRCUIT (LOADER VALVE)

THIS SCHEMATIC IS FOR THE 450E BACKHOE LOADERSPART #: 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 JOYSTICKSTABILIZER 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

T1SOS

AUX.

P16

P17

P18

P2

P1

P20

P7

P14P8P13P11

P12

P10

P9

P15P7

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 CylindersOPT: 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 ReducingValve: 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

(20) Pilot - Manifold: 297-1590

12345678

A

B

C

D

E

F

12345678

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 DESCRIPTIONSIMPLEMENT 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 CIRCUITSTABILIZER CYLINDER CIRCUIT

BOOSTED BRAKE OIL CIRCUIT

LIFT CYLINDER CIRCUITTILT CYLINDER CIRCUITAUXILIARY 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

T3T2

T1 SOS

P17

P18

P16

P3

P19

AUX.

TILT

LIFT

LOADER VALVE

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

STAB RH BOOM STICKAUX. SWING BUCKET E-STICK STAB LH

(29E) Stick Section: 348-4582

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

(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

(28) Loader Vlave (2 Bank): 342-6662(28) Loader Vlave (3 Bank): 342-6663

(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

(28A) Inlet Section: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

(29A) Inlet Section: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

(20) Pilot - Manifold: 297-1590

COMPONENT LOCATIONS VIEW (PILOT)

29

29

28

28

27

27

26

26

25

25

24

24

23

23

22

22

19

1918

1817

16

16

15

15

14

14

14

13

13

12

12

12

11

11

11

10

10

10

9

9

9

8

8

7

7

6

6

5

5

4

4

3

3

1

1

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 adjustment 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

AB

C HT2

T2

T2

T1

T1

BOOSTED BRAKES VIEW (PILOT)

A BE D C

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 PilotAccumulatorTo Tank

Master Cylinder

SlaveCylinder

A BE D C

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.

T3T3

LOADER VALVE VIEW (PILOT)

E

DCB

A

F

B C D

JK

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

DCB

A

F

View of mechanically controlled loader valve with floor plate removed.

Loader Valve

B C D

THREE BANK VALVE:

JK

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 returnto dig function.

SOS

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 BypassSwitch

Temp Sensor

SOS

SOSSOS

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

ECM

COMPONENT LOCATIONS VIEW (MECHANICAL)

29

29

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1817

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1

1

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 adjustment 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

AB

C HT2

T2

T2

T1

T1

BOOSTED BRAKES VIEW (MECHANICAL)

A BE D C

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 PilotAccumulatorTo Tank

Master Cylinder

SlaveCylinder

A BE D C

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.

T3T3

LOADER VALVE VIEW (MECHANICAL)

E

DCB

A

F

B C D

JK

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

DCB

A

F

View of mechanically controlled loader valve with floor plate removed.

Loader Valve

B C D

THREE BANK VALVE:

JK

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 returnto dig function.

SOS

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 BypassSwitch

Temp Sensor

SOS

SOSSOS

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.

B

A

C

D

ECM

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Machine ViewsPilot ViewsComponent Locations ViewImplement / Steering Pump ViewBoosted Brakes ViewBackhoe Valve ViewLoader Valve ViewHydraulic Oil Filter ViewRide Control View

Mechanical ViewsComponent Locations ViewImplement / Steering Pump ViewBoosted Brakes ViewBackhoe Valve ViewLoader Valve ViewHydraulic Oil Filter viewRide Control View

Button4: saveButton: b4 v1: a3 v1:

b2 v1: a5 v1: a6 v1: c8 v1: b8 v1:

f3 v1: f6 v1: f5 v1:

f4 v1:

c5 v1: c4 v1: c6 v1: d8 v1:

b3 v1:

a7 v1:

c7 v1:

b7 v1:

a8 v1: f7 v1:

e7 v1:

e6 v1:

e5 v1:

e4 v1: e3 v1:

e2 v1:

b4 v2: a3 v2:

b2 v2: a6 v2:

b8 v2:

f7 v2: f6 v2: f5 v2: f4 v2:

f3 v2:

d4 v2: b5 v2: c8 v2:

b3 v2:

a8 v2:

c7 v2: b7 v2:

a7 v2: e8 v2:

e7 v2: e6 v2:

e5 v2: e4 v2:

e3 v2:

e2 v2: d2 v2: c5 v2:

d7 v2: 031_callout:

001_callout:

003_callout:

004_callout:

005_callout:

006_callout:

007_callout:

008_callout:

009_callout:

010_callout:

011_callout:

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026_callout:

028_callout:

101_callout:

104_callout:

102_callout:

103_callout:

12B_callout:

12A_callout:

0001 mv fake: 22B_callout:

213_callout:

214_callout:

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221_callout:

216_callout:

217_callout:

22A_callout:

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301_callout:

011 mv01:

008 mv01:

010 mv01:

009 mv01:

007 mv01:

001 mv01:

003 mv01:

004 mv01:

023 mv01:

025 mv01:

024 mv01:

018 mv01:

019 mv01:

014 mv01:

016 mv01:

013 mv01:

015 mv01:

12B mv01:

022 mv01:

029 mv01:

006 mv01:

028 mv01:

026 mv01:

027 mv01:

005 mv01:

102 mv02:

101 mv02:

restore_callouts:

104 mv06:

12A mv01: 017 mv01: 22A mv08: 214 mv08:

209 mv08:

210 mv08:

211 mv08:

205 mv08:

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201 mv08:

218 mv08:

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217 mv08: 213 mv08:

215 mv08:

22B mv08: 222 mv08:

206 mv08:

226 mv08:

227 mv08:

228 mv08:

223 mv08:

224 mv08:

225 mv08:

207 mv08:

208 mv08:

302 mv09:

301 mv09:

103 mv04: 303 mv11: 104 mv05: 304 mv12: 304 mv13:

229 mv08: