Cat 434e Schematic Hydraylic System

12

11

10

9

8

7

29A

6

5

14 12

13

I

434E and 444E

11B

15

33

11A

4

3

2

1

SIDESHIFTCYLINDERS

16

I

31H 31 DEL

a3

DEL

TO TANK

H

H

a2

18 a2 LOAD SIGNALLINE

a1 FROM PUMP

G

G

POWERED SIDE-SHIFT OPTION BOOM

32A

STICK

STAB RH

STAB LH

SWING

BUCKET

E-STICK

BACKHOE VALVE

a1

31G 32B

32C

32D

31J

32E

31K

32F F

F

BOOSTED BRAKES (REF)

19 TO REAR AXLE LEFTWHEELBRAKE

20 STABILIZER JOYSTICK

LEFT JOYSTICK

RIGHT JOYSTICK

LEFTBRAKE PEDAL

TO REAR AXLE RIGHTWHEELBRAKE

E

   )   s   e    h   c   n    i    8    2   x   s   e    h   c   n    i    9    3   :   s   n   o    i   s   n   e   m    i    D    (

   3    0      4    8    4    6    R    N    E  e ,    R  g   a

27A RIGHTBRAKE PEDAL

BS

E

BT

36

T3 17A 17B 17C

34

21 LOADER JOYSTICK

D DEL

T2

D

35 LIFT

8B

34

28B

1

9B

RTD

FLOAT

28C HYDRAULIC CIRCUIT COLOR DESCRIPTIONS IMPLEMENTANDSTEERING PUMPCIRCUIT PILOTOIL CIRCUIT

C

   P    0    3

TILT

BOOSTEDBRAKE OILCIRCUIT LOADSENSE CIRCUIT

T1

28B

TILTCYLINDERCIRCUIT LOADERVALVECIRCUIT STABILIZERCYLINDERCIRCUIT BOOM CYLINDERCIRCUIT

10 SOS

5

STICKCYLINDERCIRCUIT SWING CYLINDERCIRCUIT BUCKETCYLINDERCIRCUIT E-STICKCYLINDERCIRCUIT

7B

7A

BACKHOEVALVECIRCUIT POWERSIDE-SHIFTCYLINDER CIRCUIT SIDE-SHIFTLOCKCYLINDER CIRCUIT

23

PUMP

C

SUPPLYLINE DRAIN/ RETURNLINE STEERING CYLINDERCIRCUIT LIFTCYLINDER CIRCUIT

22

LOADER VALVE REAR STEER CYL

FRONT STEER CYL

B

a3

LINE PATTERNS

28

Pilot / Load Sensing Pressure Drain / Return Lines

27E

Component Group

3 26

B

Pressure Line

4 LOADER VALVE

2

 Attachment  Air Line

25

CALLOUTS

TANK

YY

Taps (Pressure,Sampling,Sensor) byletter 

52

Components by number 

 A

 A THIS SCHEMATIC IS FOR THE 432E, 434E, 422E, AND 444E BACKHOE LOADER

6

24

MEDIA NUMBER: RENR6484-03 PART NUMBER: 268-0120, CHANGE: 01, VERSION: Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral. Refer to the appropriate Service Manual for Troubleshooting, Specifications.