JLG G5-18A Service Manual - Manual (Page 83)

8.9 G5-18A/2505
Hydraulic System
8.6.2 2505
MY2370
P
T
Y
FRONT AXLE
FRONT STEERING
CYLINDER
REAR STEERING
CYLINDER
LS
P L
R
T
175 bar 235 bar
A
B T
P
CF
EF P
LS
P T
a
b
G
S
A B
T
1
R
X
1
X
2
T
2
F
a
P
S
M
H
M
A
M
B
R
B
X2 X1
G
D
T2
Vg max Vg min
U
M1
B A
1
2
3
4
5
6
9
10
11
12
15
21
DRIVE PUMP SUCTION
IMPLEMENT PUMP SUCTION
FILTER RETURN
DRIVE MOTOR RETURN
20
14
8
22
13
T
P
1
2
34
24
T'
N
R
T
25
1 2
2
31
1B
1A
3B
3A
1b
1a
3a
3b
4B
4A
4a
4b
2B
2A
2a
2b
P1
P2
P3
P4
P5
P6
JS1 JS2
18
16
17
LIFT
TIL
T
AUX
CROWD
7
CROWD
AUX
TIL
T
AUXILIAR
Y
OPTIONS
INCH/STEER VAL VE RETURN
FILTER RETURN
PILOT CONTROLLER RETURN
27
P1 P2
C1 C2 C3 C4
28
19
ITEM #
DESCRIPTION
1
MAIN CONTROL
V
AL
VE, W/AUX.
2
PUMP
, HYDRAULIC (VD)
3
PUMP
, IMPLEMENT
4
MOT
OR, HYDRAULIC
5
VA
LVE, STEER SELECT
6
VA
LVE, PRIORITY
7
VA
LVE, PILOT
SELECT
8
VA
LVE, P
ARK BRAKE RELEASE
9
VA
LVE, MASTER CYL. BRAKE
10
JOYSTICK
11
FIL
TER, RETURN
12
VA
LVE, INCHING
13
VA
LVE, STEERING
14
VA
LVE, CHECK (55 PSI)
15
CYLINDER, LIFT
16
CYLINDER, COMP
17
CYLINDER, CROWD
18
CYLINDER,
TIL
T
19
HYDRAULIC RESER
VIOR (BUIL
T IN FRAME)
20
RADIA
TOR, COMBINA
TION W/ HYD. COOLER
21
AXLE, FRONT
(SER
VICE BRAKE)
22
AXLE, FRONT
(P
ARK BRAKE)
24
VA
LVE, BLOCKING
25
VA
LVE, CHECK (5 PSI)
27
SENSOR, STEERING PRESSURE
DESCRIPTION
ITEM #
28
VA
LV
E, LMI