Description November 2008
GTH-14017EX - GTH-4514EX hydraulic schematic
DESCRIPTION
M
N
R
F
P
B
N’
B
MA
L
S
L
R
T
P
Diesel engine
Auxiliary gear pump
brakes stabilizers chassis levelling
displacement: 25 cc/rev
//
Suction filter
Suction screen
Anticavitation valve
cracking pressure
5 bar
Check valve
cracking pressure:
2.5 bar
Check valve
cracking pressure:
0.5 bar (option)
Check valve
cracking pressure:
8 bar (option)
Check valve
cracking pressure:
0.5 bar (option)
Oil tank
capacity
150 liters
Steering rotating actuator
displacement: 315 cc rev/
Front axle
Rear axle
Forks levelling
slave cylinder
Rear axle pivoting
lockout cylinder
Rear axle pivoting
lockout valve
2 ways/2 positions
Left stabilizer cylinder
Right stabilizer cylinder
Chassis levelling cylinders
Boom telescoping cylinder
Boom lift cylinder
Forks tilt cylinder
Double overcenter safety valve
piloting ratio: 4 1
cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 4.2 1
cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 4.2 1
cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 4.2 1
cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 7.6 1
cracking pressure: 350 bar
/
Double overcenter safety valve
piloting ratio: 1
cracking pressure: 350 bar
4/
Sing
4/
le overcenter safety valve
piloting ratio: 1
cracking pressure: 350 bar
Max relief valve
cracking
pressure
140 bar
Anti-shock
valves
cracking
pressure
200 bar
Quick coupling
hydraulic ports
Steering modes
selector valve
4 ways / 3 positions
Front axle
steering cylinder
Rear axle
steering cylinder
Tp1
Hydraulically piloted
double check valve
piloting ratio: 4 1/
P1
P1
R1
T1
T1’
T2’
T2
R2
P2
P2
T
A
P
B
Shutoff valve
Shutoff valve
capacity:
0.5 Litri
precharge
pressure
50 bar
capacity:
0.5 Litri
precharge
pressure
50 bar
capacity:
1.5 Litri
precharge
pressure
35 bar
Pressure
switch
activating
pressure
70 bar
Pressure
switch
activating
pressure
10 bar-20
Pressure
switch
activating
pressure
10 bar-20
Hydraulically powered
service emergency brakes
pedal pump
/
Boom functions hydraulic
circuit test port
T
P
A
B
Mechanical gear speed
selector valve
4 ways/3 positions
Emergency electrical
motor driven pump set
3.2 cc/rev (option)
Mechanical gear speed
selector actuator
Boom functions pump
with integrated priority valve
displacement: 43 cc rev/
Mechanical gear (2 speeds)
E
200 bar
280 bar
1
0
2
E
1
0
2
1
0
2
E
290 bar
290 bar
1
0
2
T1
A
A
A
A
B
B
B
B
P
P
T
T
LS
Pp
Tp
Tp
FLT
Pp
RPM
G1
Ev13
MPR
A1
B1
B3
A3
B2
A2
T
P
220 bar
1
1
1
0
0
0
2
2
2
140 bar
R
T
N
150 bar
30 bar
Parking brake handle
selector valve
Forks attachment
quick coupling cylinder
Stabilizers/chassis levelling
main valve
Boom up-down
Heat exchanger fan
hydraulic motor
displacement 20 cc rev
/
Heat exchanger
HYDRAULIC CIRCUIT
COLORS LEGENDA
Boom teering, brakes, stabilizers
and chassis levelling functions lines
/ s
Low pressure and transmission
charge pressure lines
Hydrostatic transmission
high pressure lines
Hydrostatic transmission and
boom functions valve piloting lines
Boom teering, brakes, stabilizers,
chassis levelling pump pressure lines
/ s
Boom teering, auxiliary and
transmission pumps suction lines
/ s
Tank lines
Ev3
Ev4
Ev5
Ev6
Ev14
Ev15
Ev7
Ev8
Ev9
Ev10
Ev11
Ev12
Pv1
Pv2
Pv3
Pv4
Hydrostatic transmission motor
max displacement: 80 cc rev/
XA
XB
A
M3
M4
M1
L1
L2
M2
X5
B
F00B
F00A
MA
M3
L1
L3
L4
L2
S
M4
M14
M5
MB
Hydrostatic transmission pump
max displacement: 78 cc rev/
Hydrostatic transmission pump
displacement: cc rev
charge
17 /
X7
X8
24 bar
450 bar
450 bar
480 bar
480 bar
Tp3
Hydrostatic transmission
charge pressure
test port
Forward
Reverse
Check valve
cracking pressure:
8 bar
X3
Hydrostatic transmission
high pressure test port
Tp2
38
39
25
6
27
23
22
19
35
17
18
12
14
13
15
20
21
28
16
32
36
3737
26
5
10
3
2
1
4
11
8
9
40
34
7
33
Fork tilt up-down
Boom telescoping in-out
Forks attachment
quick couplingt
Boom functions
main valve
45
30
47
47
29
24
47
47
30
31
44
42
41
46
46
43
Document 57.0009.0427
GTH-4017EX GTH-4514EX GTH 4013EX
viii
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