Document 57.4402.8200 - 1
st
Edition 03/2007
INDEX
GYRO 4020 - 4518
INTRODUCTION
x
Gyro 4020 - 4518 carrer hydraulc scheme
71
72
78
79
57
68
55
64
59
63
60
65
58
62
56
67
61
66
70
54
53
T
T
T
T
P
P
P
P
A
A
A
A
A
A
A
B
B
B
B
B
B
B
75
74
77
76
82
83
89
90
81
T
P
A
A
A
A
B
B
B
B
86
85
88
87
50
A
L
B
E
U
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
13
13
11
11
12
12
9
52
51
C
T
P
69
Double ov
er
center
sa
fety
v
alv
e
piloting ratio: 11
1
cr
ac
kin
g p
res
su
re
: 200
350 ba
r
/
/
Fr
ont left outrigger
foot
cy
linde
r
Rear left outrigger
foot
cy
linder
Rear right outrigger
foot
cy
linder
Fr
ont right outrigge
r
foot
cy
linde
r
Fr
ont left outrigger
teles
co
pe
cy
linde
r
Rear left outrigger
teles
cope
cy
linder
Rear right outrigger
tele
sc
ope
cy
linder
Fr
ont right outrigge
r
tele
sc
op
e c
ylinde
r
Hy
draulicall
y pilote
d
double
ch
ec
k v
alv
e
piloting ratio:
4
1/
Hy
draulic
ally
pilote
d
double c
heck valv
e
piloting ratio:
4
1/
Hy
drauli
ca
lly
pilote
d
double c
hec
k v
alv
e
piloting ratio:
4
1/
Rear outriggers
selector valves block
Fr
ont outriggers
selector valves block
Hy
draulic
all
y pilote
d
double
ch
ec
k v
alv
e
piloting ratio:
4
1/
84
91
73
80
Pr
essur
e
switc
h
activating
pr
essur
e
50 bar
Pr
es
su
re
sw
itc
h
activ
ating
pr
es
su
re
50 ba
r
Di
ffer
ential lock
selector valve
3 ways / 2 positions
Fr
ont axle
steering cylinde
r
Fr
ont axle levellin
g
cylinder (right)
Rear axle pivoting
cylinder (right)
Rear axle pivoting
cylinder (left)
Fr
ont axle levellin
g
cylinder (left
)
Rear axl
e
steering cylinde
r
Fr
ont axle
Rear axl
e
Steering mode
s
selector valv
e
4 ways / 3 positions
Mechanical gear
speeds selector valve
4 ways / 3 positions
2 speeds mechanical gear
Mx
14 bar
Mec
hani
ca
l gea
r
sp
ee
d
s s
hif
tin
g
actuator
Chassis leveling
selector valv
e
4 ways / 3 position
s
13 ways hy
drauli
c r
otating c
olle
ctor
Rear axle pivoting cylinders
contr
ol valve
orifice dia.: 0.5 mm
cracking pr
essur
e: 0.5 ba
r
Hydr
ostatic transmission moto
r
max displacement: 75 cc
re
v
/
Double ov
er
center
sa
fe
ty
v
alv
e
piloting ratio: 11
1
cr
ac
kin
g p
res
su
re
: 200
350 ba
r
/
/
Double ov
er
center
sa
fety valv
e
piloting ratio: 11
1
cr
ac
kin
g p
re
ss
ur
e: 20
0
350 bar
/
/
Double ov
er
center
sa
fety
v
alv
e
piloting ratio: 11
1
cr
ac
kin
g p
res
su
re
: 20
0
350 bar
/
/
HYDRAULIC CIRCUI
T
COLORS LEGENDA
Boom
teering, brakes, auxiliaries
and chassis levelling functions lines
/
s
Low pr
essu
re
lines
Boom functions valve piloting line
s
Boom
teering, brakes, auxiliaries,
chassis levelling pump pr
essur
e lines
/
s
Boom
teering, auxiliary pumps
suction line
s
/
s
Tank lines
Pr
es
su
re
sw
itc
h
activ
ating
pr
es
su
re
50 bar
Rear ax
le pivoting
lo
ck
out
va
lv
es
2 wa
ys
/2 pos
itions
Fr
ont ax
le pivoting
lo
ck
out
va
lv
es
2 wa
ys
/2 pos
itions
Pr
es
su
re
sw
itc
h
activ
ating
pr
es
su
re
50 ba
r