VOLVO CONSTRUCTION EQUIPMENT Service manual BL70B CONTENT 9 Hydraulic system 9:2 Hydraulic diagram Foreword This bo
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VOLVO CONSTRUCTION EQUIPMENT
Service manual
BL70B
CONTENT 9 Hydraulic system 9:2 Hydraulic diagram
Foreword This booklet is part of a complete service manual. Read the foreword in the service manual.
WARNING Always read the booklet Safety before proceeding.
PUB 20026863-A 2011.09
1
Table of contents 99 MISCELLANEOUS 990 General, common info about 992 - 996 Hydraulic diagram ....................................................................................... 6
3
HYDRAULIC SYSTEM; DIGGING/ HANDLING/ GRADING EQUIPM.; MISC. EQUIP. 99 MISCELLANEOUS 990 General, common info about 992 996
5
Hydraulic diagram Hydraulic diagram with mechanical excavator control and servo valve block
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
BUCKET
DIPPER
3
4
2
LEFT STAB 6
57.1
61
BOOM
RIGHT STAB 7
B1
A1
57.0 57.1
B
A
A1
12
13
12
A
57.0 57
57
B
A
A
PM3
B
B1
B
BUCKET
SLEW
11
BOOM 15 SUSPENSION
A10
B9
A9
B8
B7
A8
A7
B6
A6
B5
A5
B4
A4
B3
A3
B2
A2
B1
A1
16
LS
DLS
B
MA9114 A
B10
C
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
PM1
M
P 46
T3
LOADER 17 QUICK COUPLER 18 19
T
MA9191 a10
b10
a9
b9
a1
27
28
25
24 25.0
P3
J1 MA9183
1
3
4
2
PWM9123
MA9112
23
20 20 OPTION 4x1
P4
P2 MA9143
MA9150 P
P5
A
30
A2
A1 PWM9124
24.0
R
P1
29 D
T2
SELF LEVEL
1
30.0
P
T1
TH
V1
C
L
34.0
34
T
T3 T4 T5 T6
b1
T
V2 B
34.1 P
P
T
AUXILIARY
A
60.2
EXCAVATOR QUICK COUPLER
B
P
40.0
X1
39.0
X2
39
FR1
PM2
LS
A
B
37
40.2 39.1
FR2
39.2
41
PWM9146
P
40
31
SE9106
48
T
T
60.1
T
HAND TOOL 47
LS
49
46
LR
40.1
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
T
P
60
T 35 T 36 T 38
S
L1
L
V1104157
Fig.1 Hydraulic diagram with mechanical excavator control and servo valve block
7
Hydraulic diagram with hydraulic excavator control and servo valve block
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 57.1 B1
B
A
57
A
13
12
57.0
57
B
A
PM3
B
12
A1
B
A
BUCKET
SLEW
11
BOOM 15 SUSPENSION
B9
A9
B8
B7
A8
A7
B6
A6
A5
B5
B4
A4
A3
B3
A2
B2
B1
A1
16
LS
DLS
B
MA9114 A
A10
B10
C
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
b9
a8
b8
a7
b7
a6
a5
b6
B 33
b5
a4
26
P 35-36
25.0
E
J1
1
3
4
2
P4 MA9112
23
20 20 OPTION 4x1
PWM9123
MA9183
A1
3
4
2
28 P5
P3
b3
b6 16
38
P 38
T 26 MA9136
b2
a2
a1
b1
a6 16
A
A2
62
30
PWM9124
25
24 24.0
a3
D 33 1
27
b4
P
B2
A2
B1
A1
MA9139 ISO
SAE
T
SAE/ISO
T2
P2
T1 P1
R
MA9143
MA9150 P
29
T
D
T2 T3 T4 T5 T6
SELF LEVEL
P V1
TH
C
32
1
32 3
4
32
1
2
3
4
2
1
30.0 T1
32
T 41
P5 30
P1
T
P4 30
V2 B
35
36 P
T
P
T
34.1
T 41 P
P
T
AUXILIARY
A B
60.2
EXCAVATOR QUICK COUPLER
60.1
P
40.0
X1
39.0
B
A
T
X2
39
FR1
PM2
LS
37
40.2 39.1
FR2
39.2
41
PWM9146
P
40
31
SE9106
48
LS
T
T
HAND TOOL 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
T
59
PWM9145
M 16 E
LS
48.1
39.3
S1 P
T
60
T T T T
26 35 36 38
P
S
L1
L
V1104158
Fig.2 Hydraulic diagram with hydraulic excavator control and servo valve block
9
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Volvo Construction Equipment AB Customer Support Division Dept. 45110, RLA 0301 SE-631 85 Eskilstuna Sweden e-mail: [email protected]
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