VOLVO CONSTRUCTION EQUIPMENT
Service manual
BL70B
CONTENT 9 Hydraulic system 9:2 Hydraulic diagram
This booklet is part of a complete service manual. Read the foreword in the service manual.
PUB 20026863-A 2011.09
1
Hydraulic diagram ....................................................................................... 6
3
5
6
1
loader frame lifting cylinders
16.6
dipper arm valve
34
steering valve (ORBITROL)
2
extendible dipper arm cylinder
16.7
backhoe bucket valve
34.0
overload relief valves (shock valves)
3
backhoe bucket cylinder
16.8
extendible dipper/hammer valve
34.1
load sense (LS) relief valve
4
dipper arm cylinder
16.9
loader frame lifting valve
37
steering cylinder
6
left stabiliser cylinder
16.10 4in1/quick coupler valve
39
pump
7
right stabiliser cylinder
16.11 outlet valve
40
oil filter
10
hose rupture valve (safety valve) for boom cylinder
17
diverter valve (quick coupler/ 4in1)
40.0
control valve
11
boom cylinder
18
quick coupler cylinder, loader bucket
40.1
safety relief valve
12
slewing cylinders
19
check valve (quick coupler)
40.2
oil filter by-pass valve
13
loader bucket cylinder
20
4in1 cylinders
41
oil tank
15
Boom suspension system (ride control)
23
loader joystick
46
quick coupler valve, backhoe bucket
16
main valve block
24
throttle valve
47
quick coupler cylinder, backhoe bucket
16.0
inlet valve
25
throttle valve
48
hand tool valve
16.1
loader bucket valve
27
boom lock cylinder
49
cooling package
16.2
slewing valve
28
accumulator
57
check valve stabiliser
16.3
boom valve
29
self leveling hydraulic valve
59
temperature gauge (oil tank)
16.4
right stabiliser valve
30
servo valve block
60
auxiliary/hammer valve
16.5
left stabiliser valve
31
clogging sensor (oil filter)
61
diverter valve, extendible dipper/hammer
EXTEND
LIFT 1
1
HAMMER
2
BUCKET
DIPPER
3
4
LEFT STAB 6
57.1
61
B1
BOOM
RIGHT STAB 7
A1
57.0 57.1
B
A
B1
A1
B
12
BUCKET 13
12
A
57.0 57
57 B
SLEW
11
B
A
A
3 M P
BOOM 15 SUSPENSION
A 10
B9
A9
B8
B7
A8
A7
B6
A6
B5
A5
B4
A4
B3
A3
B2
A2
B1
A1
16
LS
DLS
16.11
MA9114 A
B 10
C
B
16.10
16.8
16.9
16.7
16.6
16.4
16.5
16.2
16.3
16.1
16.0
D
P
MA9103 T
PM1
M
P 46
T3
LOADER 17 QUICK COUPLER 18 19
T
MA9191 a10
b10 b10
a9 a9
b9 b9
a1
27 24.0
28
25
24
25.0
P3
J1 MA9183
1
3
4
2
P4 MA9112
23 20 20 OPTION4x1
3 2 1 9 M W P
P2
MA9150
MA9143
P5
A
A2
A1
30
4 2 1 9 M W P
R
L
34.0
34
P1
29 P
b1
T
D
T2 T3 T4 T5 T6
SELFLEVEL
1
30.0
P
T1
TH
V1
C
T
V2 B
34.1 P
P
T
AUXILIARY
A
60.2
EXCAVATOR QUICK COUPLER
B
P
60.1
40.0
X1
40 39.0
31
47
X2
39
PM2
LS
39.1
A
B
FR2
39.2
41
PWM9146
P
37
40.2
SE9106
48
T
FR1
T
HANDTOOL
LS
T
49
LR
40.1
46
MA9116
41
MA9182 MA9109
28L
SE9105 B
48.0
P(gauge) P
T
24L PWM9145
T
59 39.3
M 16
S1
P E
LS
48.1
P
T
60
T35 T36 T38
S
L1
L
V1104157
Fig.1 Hydraulic diagram with mechanical excavator control and servo valve block
7
8
1
loader frame lifting cylinders
16.9
loader frame lifting valve
35
left excavator joystick
2
extendible dipper arm cylinder
16.10 4in1/quick coupler valve
36
right excavator joystick
3
backhoe bucket cylinder
16.11 outlet valve
37
steering cylinder
4
dipper arm cylinder
17
diverter valve (quick coupler/ 4in1)
38
stabiliser joysticks
6
left stabiliser cylinder
18
quick coupler cylinder, loader bucket
39
pump
7
right stabiliser cylinder
19
check valve (quick coupler)
40
oil filter
11
boom cylinder
20
4in1 cylinders
40.0
control valve
12
slewing cylinders
23
loader joystick
40.1
safety relief valve
13
loader bucket cylinder
24
throttle valve
40.2
oil filter by-pass valve
15
Boom suspension system (ride control)
25
throttle valve
41
oil tank
16
main valve block
26
diverter valve 4in1/ extendible dipper
46
quick coupler valve, backhoe bucket
16.0
inlet valve
27
boom lock cylinder
47
quick coupler cylinder, backhoe bucket
16.1
loader bucket valve
28
accumulator
48
hand tool valve
16.2
slewing valve
29
self leveling hydraulic valve
49
cooling package
16.3
boom valve
30
servo valve block
57
check valve stabiliser
16.4
right stabiliser valve
31
clogging sensor (oil filter)
59
temperature gauge (oil tank)
16.5
left stabiliser valve
32
throttle valve
60
auxiliary/hammer valve
16.6
dipper arm valve
34
steering valve (ORBITROL)
61
diverter valve, extendible dipper/hammer
16.7
backhoe bucket valve
34.0
overload relief valves (shock valves)
62
SAE/ISO valve
16.8
extendible dipper/hammer valve
34.1
load sense (LS) relief valve
EXTEND
LIFT 1 1
HAMMER
BUCKET
DIPPER
3
4
2
LEFT STAB 6
61
BOOM
RIGHT STAB 7
57.1 B1
A1
57.0
B
B
57.1 B1
A
BUCKET 13
12
57.0
57
57
A
12
A1
B
A
SLEW
11
B
A
3 M P
BOOM 15 SUSPENSION
MA9114 A
A10
B10
C
B9
A9
B8
B7
A8
A7
B6
A6
A5
B5
B4
A4
A3
B3
B2
A2
B1
A1
16
LS
DLS
B
16.11
16.10
16.8
16.9
16.7
16.6
16.4
16.5
16.2
16.3
16.1
16.0
D
P
MA9103 T
M
PM1
P 46
T3
LOADER 17 QUICK COUPLER 18 19
T MA9191 a10
b10
a9 a9
b9 b9 a8 a8
b8
a7
b7
a6
a5
b6
B 33
b5
a4
24.0
25
24
25.0
E MA9183
1
3
4
2
3 2 1 9 M W P
P4 MA9112
23 20 20 OPTION 4x1
A1
b2
b3
a2
B2 A2
B1 A1
a1
b1
4
2
b6 16
38
a6 16
28
26 MA9136
J1
3
P 38
T 26
P35-36
a3
D 33 1
27
b4
P5
P3
A
A2
SAE/ISO
62
30
4 2 1 9 M W P
P
MA9139 ISO
SAE
T
T2 P 2 T 1 P 1
R
MA9150
MA9143
T41
P5 30
P1
29 P
T
D
T2 T3 T4 T5 T6
SELFLEVEL
P TH
V1
C
32
1
32 3
4
32
1
2
3
4
2
1
30.0 T1
32
T
P4 30
V2 B
35
36 P
T
P
T
34.1
T 41 P
P
T
AUXILIARY 60.2
EXCAVATOR QUICK COUPLER HANDTOOL
A B
P
60.1
40.0
X1
40 39.0
31
X2
39
B
A
37
40.2 39.1
FR2
39.2
41
PWM9146
P
T
FR1
PM2
LS SE9106
48
LS
T
T
47
L
34.0
34
P2
49
LR
40.1
46
MA9116
41
MA9182 MA9109
28L
SE9105 B
48.0
P
T
P(gauge)
24L PWM9145
T
59
M16 LS
48.1
39.3
S1 P
E
T
60
T 26 T 35 T 36 T 38
P
S
L1
L
V1104158
Fig.2 Hydraulic diagram with hydraulic excavator control and servo valve block
9
To
From
Volvo Construction Equipment AB Customer Support Division Dept. 45110, RLA 0301 SE-631 85 Eskilstuna
....................................................................................
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[email protected]
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Ref. no. PUB 20026863-A 2011.09 Volvo, Konz
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