5-29
GTH-5519
Part No. 1272852
September 2016
Section 5 • Schematics
Hydraulic Schematic
M
X
1
X
2
G
MH
S
A
A
M
1
X
1
X
2
T
G
T
1
P
S
F
a
F
a1
F
e
M
B
T
2
R
B
B
U
M
A
F
S
CF
EF
L
S
L
S
L
R
T
P
P
1
4
2
3
T
T
P P2 P3
F
P1
M2
F1
T1
1
2
T2
B1
C1
C2
B2
Ax2
Ax1
X
Y
A
1
X
1
X
2
X
3
X
4
B
1
B
3
A
3
B
2
A
2
A
4
B
4
T
P
C
Y
1
Y
2
Y
3
Y
4
T
R
Diesel engine
Hydrostatic transmission
pump max displacement:
cc / rev
45
Hydrostatic transmission motor
max displacement:
cc / rev
85
Flushing valve
Boom functions pump
with integrated priority valve
displacement: 27 cc/rev
max flow rate 18.5 GPM
Suction screen
Heat exchanger
Anticavitation valves
cracking pressure
5 bar (72 psi)
Check valve
cracking pressure
2.5 bar (36 psi)
Check valve
cracking pressure
8 bar (116 psi)
Oil tank capacity
75 liters (20 gallons)
Boom functions
control lever
Boom functions
main valve
(4 sections)
HYDRAULIC CIRCUIT
COLORS LEGENDA
Functions driving lines
Low pressure and transmission
charge pressure lines
Hydrostatic transmission
high pressure lines
Load sensing and piloting lines
Open circuits high pressure lines
Suction lines
Tank lines
Steering rotating actuator
displacement: 1
cc / rev.
60
Front axle
Service brake
circuit reservoir
Service brake
pedal pump
max operating
pressure: 80 bar
(1 160 psi)
,
Forks levelling
slave cylinder
Forks tilt cylinder
Boom telescoping cylinder
Boom lift cylinder
Double overcenter safety valve
/
piloting ratio: 4.2 1
/
cracking pressure: 350 bar
,
)
i
s
p
5
7
0
5
(
Double overcenter safety valve
/
piloting ratio: 4.2 1/
cracking pressure: 350 bar
,
)
i
s
p
5
7
0
5
(
Single
/
overcenter safety valve
piloting ratio: 4.2 1/
cracking pressure: 350 bar
,
)
i
s
p
5
7
0
5
(
Single
/
overcenter safety valve
piloting ratio: 4.2:1
cracking pressure: 350 bar
,
)
i
s
p
5
7
0
5
(
270 bar
,
)
i
s
p
5
1
9
3
(
,
)
i
s
p
5
0
2
4
(
r
a
b
0
9
2
,
)
i
s
p
5
0
2
4
(
r
a
b
0
9
2
Cracking pressure
2
5
r
a
b
0
(
psi)
7,540
Cracking pressure
2
5
r
a
b
0
(
psi)
7,540
Cracking press.
25 bar
0
)
i
s
p
6
3
(
Cracking press.
4
bar (
psi)
95
7,180
Max relief valve
cracking
pressure:
4
r
a
b
0
1
0
3
0
,
)
i
s
p
2
(
Anti-shock
valves
cracking
pressure:
0
0
r
a
b
2
(
psi)
2,900
Quick coupling
hydraulic ports
Forks attachment
quick coupling cylinder
Steering mode
selector valve
4 ways / 3 positions
Front axle
steering cylinder
Rear axle
steering cylinder
TP
3
Tp
5
TP
2
TP
1
Hydraulically piloted
double check valve
piloting ratio: 4/1
T
A
P
B
Shutoff valve
Parking brake
minimum pressure
pressure switch
activating pressure:
20 bar (290 psi)
Parking brake
selector valve
Auxiliary continous flow
metering valve
1,0 mm (0,04 in.)
1 mm (0,04 in.)
Auxiliary continous flow
selector valve
Forks tilt function
enabling valve
Quick connect/disconnect
attachment enabling valve
Service brake
pressure switch
activating pressure:
2,8-6,3 bar
(40-90 psi)
Hydrostatic transmission
boost pressure test port
Hydrostatic transmission
high pressure test port
Boom functions hydraulic
circuit test port
Service brake
circuit test port
X4
X51
X37
X42
X52
X12
Return filter
with suction line
pressurized at 0,5 bar
(8 psi)
X45
X18
X49
X53B
X54A
X26
TP
4
Parking brake
circuit test port
