Excavator Cat 322c Diagram Hyd

RENR7137 January 2003

30

27

28

26

25

38

22

24

21

20

18

23

BL 4

BL 3

BL2

322C Excavators Hydraulic System

BL1

X

AL4

AL3 AL2

DAA1-UP

AL1

FED1-UP

TANK3

BTE1-UP KCF1-UP HBG1-UP ADX1-UP

Main Conrol Valve

© 2003Caterpillar   All Rights Reserved

14

PAC

49

DR2 DR6

47

T-OUT(2)

T-OUT(1) PSA1

46 DR1

DR5

PSA2

Pi2

45 P-IN Pi1

DR4

P2

Pilot Oil Manifold P1

50

Printed in U.S.A.

1

Hydraulic Schematic

11

34

61 33

206-3169

59

MAINCONNECTORLINE

60

51

2

PILOTLINE

3

58

4

DRAINLINE

8 13 14 16

9

57

PG DR 1

MU Pp3

Pp3

8

6

5

7 T

9

9

T

2

10 67

B

A

A

B

B

A 64 62

3

6 63 66

10

4

12

55

56

7

15

11

16

SPi

BP2

14

SP2

BPi

13

SDr 

BDr 

BP3

SP3 SP1 T

AL4 aL4

R2

BL3

ST

aL3

BL2

AL2

AL3

BL1 aL2

aL1

BR5

Di4

Pi4

aR1

AR1 aR2

BR2 AR2 aR3

BR3

AR3

aR4

Pi1

AR4

AL1

BT

BP1 BR4

AR5

aR5 R3

R1

23

21 20

18

BR1

22

19

30

24 25

28

27

26

31 29

17

17

32

33

34 35

37

36

38

41

40

39

HR HL

bL4

Di2

bL3

Pi2

Pi3

Di3

DST

bL1

bL2

PL

PR

bR1

bR2

bR4

bR3

Di1

bR5

42 STANDARDCOMPONENTS A1

B1

A2

B2

A3

B3

A4

B4

A5

C B5

A6

B6

A7

B7

Item No.

A8

Ps1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Pn1

25 26

B8

A2

B1

A1 G2

FR

M2

U

53

B2

48

Pn2

RR P2

P1 P2 P3 P4

45 Pi1 NO1

P1

A2

A4

46 Pi2

Ps2

PSA1

54

PSA2 NO3

(SW

47

PsM2 M4

PAC

49

S3

52

51

55 Dr2 Dr1

S1

44

50 DrM S4

43 C

62 P

T

B

G

A

DR1 DR2 DR3 DR4 DR5 DR6

58 DE

G

F

60

PIN TOUT

61

M3

65

63 A1

59 A3 T

56 57 A

Pi G1

Pm

M1

64

L B

PsM1

66

27 28 29 30 31 32 33

Component

 Stick Cylinder   Swing Motor   Left TravelMotor   Right TravelMotor    Anti-Reaction Valve  TravelBrake Valve (Left)  TravelBrake Valve (Right)  Bucket Cylinder   Boom Cylinder   Swivel  Pilot ControlValve (Travel)  Line ReliefValve (Stick Cylinder Rod End)  Stick Drift Reduction Valve  Main ControlValve  Line ReliefValve (Boom Cylinder Head End)  Boom Drift Reduction Valve  Pressure Switch  Boom IIControlValve  Stick Regeneration Valve  Stick IControlValve  Swing ControlValve  Left TravelControlValve  Straight TravelSolenoid Valve  Straight TravelControlValve  Right TravelControlValve  Attachment ControlValve  Bucket ControlValve  Boom IControlValve  Line ReliefValve (Boom Cylinder Rod End)  Stick IIControlValve  ReliefValve (Negative Flow)  Pilot ControlValve (Swing and Stick)  Pilot ControlValve (Boom and Bucket)

Item No.

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

Component

 ReliefValve (Negative Flow)   Stick Unloading Valve  Line ReliefValve (Stick Cylinder Head End)   Variable Swing Priority Valve  Main ReliefValve  Line ReliefValve (Bucket Cylinder Rod End)  Line ReliefValve (Bucket Cylinder Head End)  Boom Regeneration Valve   Logic Valve  ReliefValve (Fan Pump)   Bypass Check Valve  TravelSpeed Solenoid Valve  Swing Parking Brake Solenoid Valve  Hydraulic Activated Valve Accumulator    S   olenoidValve (HydraulicActiviation)  Pilot OilManifold  Pressure Reducing Valve for Swing Priority  Pressure Reducing Valve for Boom Priority  Pressure Sensor (Left Pump)  Left Pump  Cooling Pump  OilCooler   Gear Pump (Fan Motor)   Return Filter 

59 60

 Hydraulic Tank

61 62 63 64 65 66

 Pilot OilReliefValve

 Drain Filter   Pilot OilFilter   Right Pump  Pressure Sensor (Right Pump)  Pilot Pump  ProportionalReducing Valve (Power Shift)

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