Sơ đồ thủy lực máy đào CAT 320 - P1
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©
2003 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR3613-01
January 2003
320C U Excavator
Hydraulic System
APA1-UP
CLM1-UP
ALX1-UP
CLZ1-UP
FBB1-UP
GAB1-UP
MAC1-UP
PAC1-UP
DR2
T-OUT(2)
PSA1
DR1
PSA2
P-IN
Pi1
P2
PAC
P1
DR6
T-OUT(1)
DR5
Pi2
DR4
X
TANK3
AL4
AL3
AL2
AL1
BL4
BL3
BL2
BL1
28
27
26
25
24
35
23
22
21
20
18
47
46
45
44
Main Conrol Valve
Pilot Oil Manifold
13
43
IN
T
OUT
BDr
Pi2
Pi
Dr1
A3
M1
M2
A1
A2
NO3
PIN
PAC
Pi1
P2
P1
PSA2
DR6
DR5
PSA1
DR4
DR3
DR2
DR1
BP1
BT
B A
T
T
S1
S3
Pn1
TOUT2
TOUT1
RR
EF
FR
PsM2
Ps1
PsM1
T
P1P2
B2
A2 B1
G D
C
BA
U
Pn2
B8B7B6C
B5
B4B3B2
B1
A8A7A6A5
A4A3
A2
A1
CLOSE
OPEN
SDr
STSP1
SP2
Pi3 Di3
DST
PRPL
AR4
R1BR4
AR3BR3
AR2
BR2
SPi
SP3
AR1
BR1
BR5
PB6
DB6
PB2
PB1
DOWN
L
R
IN
Di4
Pi4
AL1
UP
OUT
bL3
AR5
Pm
G2
G1
AL4
DB1
BL1
DB2
AL2
A B
PB5
A1
BL2
BPi
AL3
R2
G4
BP3
G3
BP2
bR4
aR5
Pi1
aR4
bR5
HR
Di1
aR3
bR3
aR2
bR2
aR1
bR1
aL1
bL1
Dr2
HL
Ps2
aL2
bL2
bL4
Pi2
aL4
Di2
DB5
Pp3
R3
Pp3
DR
NO1
(SW
BL3
aL3
MU
DR
AB
PG
PILOT LINE
DRAIN LINE
Hydraulic Schematic
MAIN CONNECTOR LINE
171-0097
Item
Component
STANDARD COMPONENTS
Component
No.
Item
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
35
36
37
38
39
40
41
33
34
45
46
47
48
42
44
43
50
49
51
54
55
56
57
52
53
58
1
2
3
4
5
6
7
8
9
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44 45
46
47
48
49
50
51
30
31
32
59
60
61
62
Stick Cylinder
Swing Motor
Travel Motor (Left)
Travel Motor (Right)
Anti-Reaction Valve (Swing Motor)
Travel Brake Valve (Left)
Travel Brake Valve (Right)
Bucket Cylinder
Boom Cylinders
Swivel
Pilot Control Valve (Travel)
Stick Drift Reduction Valve
Main Control Valve
Boom Drift Reduction Valve
Pressure Switch
Pressure Switch
Negavtive Flow Control Relief Valve
Boom II Control Valve
Stick Regeneration Valve
Stick I Control Valve
Swing Control Valve
Left Travel Control Valve
Straight Travel Control Solenoid
Right Travel Control Valve
Attachment Control Valve
Bucket Control Valve
Boom I Control Valve
Stick II Control Valve
Pilot Control Valve (Swing and Stick)
Pilot Control Valve (Boom and Bucket)
Stick Unloading Valve
Line Relief Valve (Stick Cylinder Head End)
Variable Swing Priority Valve
Straight Travel Control Valve
Main Relief Valve
Line Relief Valve (Bucket Cylinder Rod End)
Line Relief Valve (Bucket Cylinder Head End)
Boom Regeneration Valve
Line Relief Valve (Boom Cylinder Rod End)
Negative Flow Control Relief Valve
Logic Valve
Pressure Switch
Pilot Oil Manifold
Travel Speed Solenoid Valve
Swing Parking Brake Solenoid Valve
Valve (Hydraulic Activation)
Solenoid Valve (Hydraulic Actation)
Accumulator
Reducing Valve (Boom/Swing Priority Mode)
Pressure Sensor (Left Pump)
Bypass Check Valve
Slow Return Check Valve
Oil Cooler
Hydraulic Tank
Return Filter
Case Drain Filter
Pilot Relief Valve
Pilot Filter
Left Pump
Right Pump
Pilot Pump
Pressure Sensor (Right Pump)
52
53
54
55
56
57
58
59
60
61
62
1
8
56
54
53
61
60
59
58
55
57
12 13 14 17 18 19 20
21 22 23
24 25
26 27
28 31 32 33 34 35
36 37 38 39 40
63
74
43 44 45 46 47
9
2
10
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