7-21
GTH-2506 GTH-3007
Part No. 57.4400.9220GT
August 2018
Section 7 • Schematics
Hydraulic Schematic - GTH-2506
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
GTH-2506
Stage IIIA/IIIB
HYDRAULIC SCHEMA
TIC
TEREXLIFT
57.2201.3721
Drawn: M. Baldinucci
Rev
.
B
Page 1 of
1
Date:
.
.20
23 10
14
CF
EF
L
S
L
S
L
R
T
P
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
Suction screen
Heat exchanger
Telescopic boom functions
main valve (4 sections)
Anticavitation valves
cracking pressure
5 bar
Check valve
cracking pressure
2.5 bar
cracking
pressure
8 bar
Oil tank capacity
at gauge level
65 liters
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
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
Double overcenter safety valve
/
piloting ratio: 4.2 1
/
cracking pressure: 350 bar
Single
/
overcenter safety valve
piloting ratio: 4.2 1
/
cracking pressure: 350 bar
Single
/
overcenter safety valve
piloting ratio: 4.2:1
cracking pressure: 350 bar
Cracking pressure
0 bar
52
Cracking pressure
0 bar
52
Cracking press.
bar
25
Cracking press.
4
bar
95
Max relief valve
cracking
pressure:
1 0 bar
4
Anti-shock
valves
cracking
pressure:
2
bar
00
Quick coupling
hydraulic ports
Forks attachment
quick coupling cylinder
(optional)
Steering mode
selector valve
4 ways / 3 positions
Front axle
steering cylinder
Rear axle
steering cylinder
TP
3
TP
4
TP
2
TP
1
TP
5
Hydraulically piloted
double check valve
piloting ratio: 4/1
(optional)
T
A
P
B
Shutoff valve
Service brake
pressure switch
activating pressure:
2,8-6,3 bar
Hydrostatic transmission
boost pressure test port
Hydrostatic transmission
high pressure test port
Boom functions hydraulic
circuit test port
Low pressure hydraulic
circuit test port
Service brake
circuit test port
X4
X56
X52
X12
Return filter
with suction line
pressurized at 0,5 bar
T
P
PR
PKB
Ps
MP Acc
TP
MPR
PPZ
280 bar
32 bar
1,0 mm
1 mm
X58
A
C
B
D
E
G
X49
RPM
VM
Parking brake
minimum pressure
pressure switch
activating pressure:
25 bar
Accumulator
capacity:
0.5 Litres
precharge
pressure:
35 bar
A4
B4
P
A
T
TL
PL
CH
LS
Pp
Tp
LS
A3
B3
P
A
T
TL
PL
CH
LS
Pp
Tp
LS
100 bar
A2
B2
P
A
T
TL
PL
CH
LS
Pp
Tp
LS
300 bar
300 bar
A1
B1
P
A
T
TL
PL
CH
LS
Pp
Tp
LS
TL
PL
Pp
Tp
LS
Cp3
GD
GC
X51
X18
X63
X64
X59
X60
X62
X65
X66
X61
X45
B
B
B
B
Inching
(optional)
valve
From GTH250619M-1001