Sistema Hidraulico 950H

(1)

INTERACTIVE SCHEMATIC

The

The Bookm

Bookm arks pane

arks panel will

l will allow you to

allow you to

quickly navigate to points of interest.

Click on any text th

Click on any text th at is BLUE a

at is BLUE and und

nd und erlined.

erlined.

The

These are hype

se are hyperlin

rlin ks t

ks t hat can be used to n

hat can be used to n avi-

avi-gate the schema

gate the schematic and m

tic and m achine views.

achine views.

When only one callout is showing on a machine view this

button will make all of the callouts visible. This button is

located in the top

located in the top right

right corner of

corner of eve

every machin

ry machin e view pa

e view page.

ge.

VIEW

ALL

CALLOUTS

Cover Page Cover Page Information Information Schematic Schematic Machine Views Machine Views Component Table Component Table Tap Table Tap Table

Fluid Power Symbols Fluid Power Symbols Electrical Symbols Electrical Symbols Front Frame Front Frame Rear Frame Rear Frame Tap Views Tap Views Features Features Options Options Bookmarks Bookmarks XX EC-C3 EC-C3 EC-C2

EC-C2 _E-C60_E-C60

EC-C1

E-C61

T

To set your

o set your screen resolution do

screen resolution do the following:

the following:

RIGHT CLICK

on the

DESKTOP

..

Select

PROPERTIES

..

CLICK

the

SETTINGS TAB

..

MOVE THE SLIDER

under

SCREEN RESOLUTION

until it shows

1024 X 768

..

CLICK OK

to apply the resolution.

T

This

his docum

docum e

ent

nt is

is best viewe

best viewed at a

d at a

screen resolution of 1024 X 768.

FUNCTION

Zoom In

HOTKEYS (Keyboard Shortcuts)

Zoom Out

Fit to Page

Hand Tool

““ CT

CTRL” / “

RL” / “ +

+””

KEYS

““ CT

CTRL” / “

RL” / “ --””

““ CT

CTRL”

RL” / “

/ “ 0

0”

” (z

(zero

ero))

““ SP

SPACE

ACEBAR”

BAR” (hold down)

(hold down)

F

(2)

Hydraulic System

950H, 962H, and IT62H Wheel Loader

© 2012 Caterpillar, All Rights Reserved

Printed in U.S.A.

RENR8879-05

November 2012

950H:

N1A1-4396

JAD1-409

M1G1-2110

J5J1-UP

K5K1-2760

962H:

N4A1-2115

M3G1-678

J6J1-UP

K6K1-516

MAL1-122

IT62H:

M5G1-467

(3)

COMPONENT LOCATION

6 0 4 3 2 -2 2 1 163-0324 146-7571 0 0 0 4 -2 4 1 8J-1553 5 3 6 8 -4 2 1 163-0324 5 7 7 7 -1 1 1 0 9 7 1 -7 4 1 5 7 8 6 -J 8 3 8 8 2 -4 5 1 241-9299 254-4108 0 2 2 4 -2 4 2 247-0497 245-7491 245-7487 2 7 2 4 -2 4 2 1 7 2 4 -2 4 2 112-1817 245-2975 6 4 1 5 -4 5 2 2 5 1 6 -6 4 2 244-1426 244-1031 242-1307 249-2334 220-0814 237-2742 141-2597 275-8544 261-4171 261-3682 261-4172 261-3683 274-8055 245-2973 6 4 1 5 -4 5 2 242-1307 193-1448 105-6117 214-4863 215-3687 213-8773 129-8090 106-1774 174-4312 175-3244 180-8585 237-0946 7 1 8 1 -2 1 1 Part Number 230-417

HMU STEERING CIRCUIT

COMMAND CONTROL STEERING

MAIN SCHEMATIC

BRAKE SYSTEM Description

Hand Metering Unit e c i f i r O -r o t c e n n o C Cylinder Gp - Steer Valve Gp - Neutralizer r e e t S -p G e v l a V Valve Gp - Neutralizer r e e t S -p G e v l a V Cylinder Gp - Steer k c e h C -p G e v l a V t o li P -p G e v l a V e l t t u h S -p G e v l a V p G n e e r c S Pump Gp - Steering Pump Gp - Implement t li T -r e d n il y C

Cylinder - Tilt (Mid Lift) Cylinder - Tilt (High Lift) Cylinder - Tilt (Logger)

) H L ( t f i L -r e d n il y C ) H R ( t f i L -r e d n il y C

Valve Gp - Manual Lowering Accumulator - Pilot Oil

n a F -p G p m u P n a F -p G r o t o M

Valve Gp - Cooler Bypass Filter Gp - Return Oil

Manifold Gp - Fan & Brake Charge Filter Gp - Case Drain

Valve Gp - Breaker Relief Tank Gp - Hydraulic Oil

Valve Gp - Secondary Steer Diverter Pump Gp - Secondary Steer Valve Gp - Control (2 Function Standard) Valve Gp - Control (2 Function W/RC) Valve Gp - Control (3 Function) Valve Gp - Control (2 Function W/RC)

Valve Gp - Control (Snow Removal) (3 Function W/RC)

Accumulator - Ride Control (RC)

n a F -p G p m u P

Manifold Gp - Fan & Brake Charge Control Gp - Foot Brake

Switch As - Foot Brake Limit Sensor Gp - Foot Brake Valve Gp - Foot Brake Accumulator - Service Brake Actuator As - Parking Brake

Valve Gp - Parking Brake

Switch As - Parking Brake Pressure Switch As - Brake Pressure Valve Gp - Quick Coupler Cylinder Gp - Quick Coupler

l a u n a M -p G e v l a V Machine Locations 1 2 3 4 5 6 7 8 9 10 11 12 13 14 20 21 23 24 25 26 27 28 30 31 32 33 34 35 41 25 30 45 46 47 48 49 50 51 52 53 36 15 54 55 56 A-4 4 -B , 3 -B B-1 B-3, B-4 2 -B D-3 1 -D E-1 3 -D 4 -D 3 -C 2 -E A-6 B-7 8 -F F-8 F-8 F-8 7 -F 7 -F F-9 F-5 8 -B 8 -B B-9 B-9 C-8 A-8 A-8 A-8 B-5 A-5 F-8 F-6 2 -F F-2 F-3 F-3 F-3 F-3 F-2 F-1 F-2 F-1 F-3 C-9 C-9 9 -C Schematic Location F-8 F-8 F-8 F-8

(4)

TAP LOCATION

8 -B

A

E-9

CC

E-9

DD

B-7

6 -B

E

FF

A-4, C-4

5 -E

G

8 -B

H

KK

D-2

LL

D-2

MM

D-3

NN

D-3

3 -F

P

4 -F

Q

4 -F

R

8 -F

X

YY

F

-

8

9 -B

Tap

Number

Description

Schematic

Location

e

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u

s

e

r

P

e

g

r

a

h

c

s

i

D

p

m

u

P

n

a

F

Implement Pump Charge Pressure

Implement Pump Load Sense Pressure

e

r

u

s

e

r

P

p

m

u

P

r

e

t

S

Steer Pump Load Sense Pressure

e

r

u

s

e

r

P

y

l

p

u

S

t

o

li

P

e

r

u

s

e

r

P

e

s

n

e

S

d

a

o

L

p

m

u

P

n

a

F

Command Control Right Steer Pilot Pressure

Command Control Left Steer Pilot Pressure

Command Control Steering Neutral Pilot Press

Command Control Steering Supply Pressure

e

r

u

s

e

r

P

e

k

a

r

B

e

c

i

v

r

e

S

e

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s

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P

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k

a

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B

e

c

i

v

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e

S

t

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o

r

F

e

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u

s

e

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P

e

k

a

r

B

e

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i

v

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S

r

a

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R

e

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u

s

e

r

P

d

n

E

d

o

R

r

e

d

n

il

y

C

t

li

T

Tilt Cylinder H

e

a

d

E

n

d

P

r

e

s

u

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t

r

o

P

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S

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(5)

ELECTRICAL SYMBOLS

Hydraulic Symbols (Electrical)

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 Identifi cation Codes

Current Standard

Previous Standard

Electrical Schematic Example

Hydraulic Schematic Example

325-PK

Wire Color Circuit Number Identification

B

A

Wire Wire (EXAMPLE VALVE)

Current Standard

Transducer

(Fluid)

Transducer

(Gas / Air)

G

Generator

Electrical Wire

Pressure Switch

M

Electric Motor

Pressure Switch

(Adjustable)

Temperature Switch

Pressure

Symbol

Temperature

Symbol

Level

Symbol

Flow

Symbol

Electrical Symbols (Electrical)

(6)

FLUID POWER SYMBOLS

ONE POSITION TWO POSITION THREE POSITION

VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL

LINES CROSSING LINES JOINING

TWO-WAY THREE-WAY FOUR-WAY

SPRING CONTRO L 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

PRESSURE TEMPERATURE FLOW

ROTATING SHA FTS

UNIDIRECTIONAL BIDIRECTIONAL

PUSH-PULLLEVER GENERAL MANUAL PUSH BUTTON PEDAL SPRING

MANUAL CONTROL SYMBOLS

HYDRAULIC MOTORS FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL HYDRAULIC PUMPS

FLUID STORAGE RESERVOIRS

CROSSING AND JOINING LINES

VALVE ENVELOPES VALVE PORTS

BASIC COMPONENT SYMBOLS

FLUID CONDITIONER PUMP or MOTOR FIXED DISPLACEMENT VARIABLE DISPLACEMENT NON-COMPENSATED UNIDIRECTIONAL BIDIRECTIONAL VALVES

PILOT CONTROL SYMBOLS

RELEASED PRESSURE

EXTERNAL RETURN INTERNAL RETURN

REMOTE SUPPLY PRESSURE

SIMPLIFIED COMPLETE INTERNAL SUPPLY PRESSURE

ACCUMULATORS

SPRING LOADED GAS CHARGED SOLENOID or MANUAL SOLENOID and PILOT SOLENOID and PILOT or MANUAL COMBINATION CONTROLS

SOLENOID SERVO THERMAL DETENT

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

SHUTTLE PILOT CONTROLLED

(7)

Components are shown installed on a fully operable machine with the key and engine off, transmission shifter In neutraland with parking brake set.

Refer to the appropriate service manualfor troubleshooting, specifi cations and systems operations.

SCHEMATICPART NUMBER241-0475, CHANGE09, VERSION-MEDIANUMBER RENR8879-05

THIS SCHEMATICIS FORTHE HYDRAULICSYSTEM

BRAKESYSTEM PART NUMBER244-1398, CHANGE00, VERSION-950H, 962H, ANDIT62H WHEEL LOADER

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

YY

DRAIN / RETURN LINE

HYDRAULIC CIRCUIT COLOR DESCRIPTIONS

IMPLEMENT PUMP OUTPUT

PRIMARY STEERING PUMP CIRCUIT STEERING CIRCUIT IMPLEMENT PILOT SUPPLY OIL

AUXILIARY CIRCUIT IMPLEMENT PUMP LOAD SENSING CIRCUIT

SUPPLY LINE

TILT CYLINDER CIRCUIT LIFT CYLINDER CIRCUIT SECONDARY STEERING CIRCUIT

BRAKE CHARGE VALVE AND FAN CONTROL CIRCUIT MAIN RELIEF VALVE LOAD SENSING CIRCUIT

BRAKE CONTROL CIRCUIT

EE AA SOS HH DD FF MM NN LL KK FF GG XX YY CC RR QQ PP

HMU STEER AND 3PC IMPLEMENT COMMAND CONTROL STEERING ATTACHMENT

A1 A1 B1 B1 C1 C1 _C1 D1 D1 D1 E1 E1 E1 CROSSOVER RELIEF SHUTTLEVLV DIRECTIONAL SPOOL MAKEUP CHECK BACKUP RELIEF PRESSURE REDUCING VALVE PILOT PORT"A" PILOT PORT"B" REGULATED PRESS. PORT TO PILOT VALVE TANKPORT CYL PORT "A" CYL PORT "B" LOADSENSING PUMPPORT PORT ALEVERFORWARD LEFT HANDLINEONBOOM (WHENVIEWEDFROM CAB) CROSSOVERRELIEF CYL PORT "A" CYL PORT "B" MAKE-UPCHECKS DIRECTIONAL SPOOL BACK-UPRELIEF PUMPPORT HMUSUPPLY PORT PILOT PORT "B" PILOT PORT "A"

PILOT CONTROL SPOOL

TILT RACK BACK DUMP RACK BACK HOLD DUMP LIFT RAISE LOWER/ FLOAT RAISE HOLD LOWER FLOAT HOLD HEAD END PORT “B” 3RDFUNCTION (ATTACHMENT) PORT A PORT B LS DR R H LS P T F PS A1 A2 TO FRONT BRAKES TO REARBRAKES

BRAKE SYSTEM A1 A2 PS F LS P T TO FANMOTOR TO CASEDRAINMANIFOLD NC NO C C TO TRANSMISSION CONTROL TO BRAKE LIGHTS APPLY RELEASE FRONT AXLE REARAXLE HYDRAULIC TANK

Connection B1 Only For Command Control Steering

PORT BLEVERREARWARD RIGHT HANDLINEONBOOM (WHENVIEWEDFROM CAB) QUICK COUPLER(ATTACHMENT) (1) HAND METERING UNIT 230-4176 (4) VALVE GP NEUTRALIZER 146-7571 (2) CONNECTOR ORIFICE 122-2340 (5) VALVE GP STEER 142-4000 (3) CYLINDER GP STEER 230-4176 (11) VALVE GP SHUTTLE 8J-6875 (9) VALVE GP CHECK 111-7775 (6) VALVE GP NEUTRALIZER 8J-1553 (10) VALVE GP PILOT 147-1790 (12) SCREEN GP 154-2883 (8) CYLINDER GP STEER 163-0324 (7) VALVE GP STEER 124-8635 (48) VALVE GP FOOTBRAKE 215-3687 (30) MANIFOLD GP FAN AND BRAKE CHARGE 242-1307

(25) PUMP GP FAN 254-5146 (52) SWITCH AS PARKING BRAKE PRESSURE

174-4312 (50) ACTUATOR AS PARKING BRAKE 129-8090 (51) VALVE GP PARKING BRAKE 106-1774 (49) ACCUMULATOR SERVICE BRAKE 213-8773 (45) CONTROLGP FOOTBRAKE 193-1448 (46) SWITCH AS FOOTBRAKE LIMIT 105-6117 (53) SWITCH AS BRAKE PRESSURE 175-3244 (47) SENSOR GP FOOTBRAKE 214-4863 (31) FILTER GP CASE DRAIN 249-2334 (32) VALVEGP BREAKER RELIEF 220-0814 (28) FILTER GP RETURN OIL 244-1031 (27) VALVE GP COOLER BYPASS 244-1426 (34) VALVE GP SECONDARY STEER DIVERTER 141-2597 (26) MOTOR GP FAN 246-6152 (54) VALVE GP QUICK COUPLER 180-8585 (56) VALVE GP MANUAL 112-1817 (55) CYLINDER GP QUICK COUPLER 237-0946 (30) MANIFOLD GP FAN AND BRAKE

CHARGE 242-1307 (25) PUMP GP FAN 254-5146 (36) VALVE GP CONTROL 2 FUNC STD 261-4171 2 FUNC W/RC 261-3682 2 FUNC W/RC 261-3683 3 FUNC STD 261-4172 3 FUNC W/RC 274-8055 (23) VALVE GP MANUAL LOWERING 112-1817 (15) CYLINDER GP TILT 242-4220 TILT (MID LIFT) 247-0497 TILT (HIGH LIFT) 245-7491 TILT (LOGGER) 245-7487 (21) CYLINDER LIFT (RH) 242-4271 (41) ACCUMULATOR RIDE CONTROL (RC) 245-2973 (20) CYLINDER LIFT (LH) 242-4272 (24) ACCUMULATOR PILOT OIL 245-2975 (14) PUMP GP IMPLEMENT 254-4108 (13) PUMP GP STEERING 241-9299 (35) PUMP GP SECONDARY STEER 275-8544 (33) TANK GP HYDRAULIC OIL 237-2742 RELIEF 272-7003 256-2866 RELIEF 272-7003 RELIEF 247-8632 RELIEF 254-5789 RELIEF 282-4349 RELIEF 4T-7581 RELIEF 272-2334 RELIEF 272-2334

(8)

FAN AND BRAKE PUMP

HH

AA

30

25

(9)

FAN AND BRAKE PUMP

FAN A ND BRAK E HYDRAULIC SYSTEM

The fan and brake pump (25) is located on the front gear train of the engine, on the right side of the

machine. The fan and brake pump provides oil flow for the electronic demand fan systemand the

brake hydraulic system. The outlet pressure tap (AA) is located on the fan and brake pump.

Also located on the engine on the right side of the machine is the fan control and brake accumulator

charging valve (30). The fan pump load sense pressure tap (HH) is located above the brake charging

valve.

HH

AA

30

25

(10)

HMU AND SERVICE BRAKES

The following components are located under the front of the cab.

- Hand metering unit (1)

- Foot service brake valve (48)

- Steer pump load sense test port (FF)

- Front sercive brake test port (QQ)

- Rear service brake test port (RR)

QQ

FF

RR

48

1

(11)

IMPLEMENT CONTROL VALVE

This photo shows a front view of the implement control valve (36) in the loader frame. The following components can be seen in this view:

- Pilot accumulator (24) - Pilot supply pressure tap (GG)

The Following components are not referenced on the Hydraulic System Schematic: - Pressure differential relief valve (A)

- Head end solenoid valve (ride control) (B) - Signal relief valve (C)

- Tilt anti-drift valve (D)

- Rod end solenoid valve (ride control) (E) - Ride control balance solenoid valve (F) - Pilot pressure reducing valve (G) - Lift cylinder head end pressure tap (H)

- Lift cylinder head end pressure sensor for Payload Control System and Autodig (J) - Hydraulic lockout solenoid valve (K)

This photo shows a left rear view of the implement control valve (36). The following components can be seen in this view:

- Implement control valve supply pressure tap (GG)

The Following components are not referenced on the Hydraulic System Schematic: - Tilt anti-drift valve (A)

- Signal relief valve (B) - Signal duplication valve (C) - Return to tank port (D) - Supply port from pump (E) - Signal line to pump (F) - Tank line (G) - Screen (H)

- Tilt back pilot solenoid valve (J) - Tilt back pilot (K)

- Tilt cylinder rod end line relief (L) - Ride control balance solenoid valve ( M) - Rod end solenoid valve (ride control) (N)

This drawing shows a right side view of the wheel loader. The following components can be seen in this view:

- Implement pump pressure tap (CC) - Implement pump load Sense pressure tap (DD)

A

B

F

E

D

G

H

J

K

C

A

B

C

F

E

D

G

H

J

K

L

M

N

GG

DD

CC

24

VIEW ALL CALLOUTS

SERVICE CENTER

The service center is located on the right side of the machine below the cab. The Following components are located in the service center:

- Case drain filter (31)

- Hydraulic oil fluid sampling valve (SOS) - Hydraulic systems kidney loop filter (28) - Brake system accumulators (49)

The Following components are not referenced on the Hydraulic System Schematic: - Power train oil fluid sampling valve (A)

- Power train oil filter (B)

- Ecology drain for the hydraulic tank (C)

The following remote pressure taps are located inside the panel on the frontside of the service center:

- Steering pump outlet pressure (EE) - Brake system accumulator pressure (PP)

The Following components are not referenced on the Hydraulic System Schematic: - Transmission reverse clutch (A)

- Transmission forward clutch (B) - Transmission fourth speed clutch (C) - Transmission third speed clutch (D) - Transmission second speed clutch (E) - Transmission first speed clutch (F) - Torque converter inlet pressure (G)

A

B

C

A

B

F

E

D

G

C

H

J

M

L

K

SOS

_EE _PP

49

31

28

(12)

SERVICE CENTER

The service center is located on the right side of the machine below the cab. The Following components are located in the service center:

- Case drain filter (31)

- Hydraulic oil fluid sampling valve (SOS) - Hydraulic systems kidney loop filter (28) - Brake system accumulators (49)

The Following components are not referenced on the Hydraulic System Schematic: - Power train oil fluid sampling valve (A)

- Power train oil filter (B)

- Ecology drain for the hydraulic tank (C)

The following remote pressure taps are located inside the panel on the frontside of the service center:

- Steering pump outlet pressure (EE) - Brake system accumulator pressure (PP)

The Following components are not referenced on the Hydraulic System Schematic: - Transmission reverse clutch (A)

- Transmission forward clutch (B) - Transmission fourth speed clutch (C) - Transmission third speed clutch (D) - Transmission second speed clutch (E) - Transmission first speed clutch (F) - Torque converter inlet pressure (G) - Transmission lubrication pressure (H) - Transmission pump outlet pressure (J) - Torque converter outlet pressure (K) - Steering cylinder rod end grease fittings (L) - Rear axle oscillation bearing grease fittings (M)