JLG G5-18A Service Manual - Manual (Page 82)

Hydraulic System
8.8 G5-18A/2505
8.6 HYDRAULIC SCHEMATICS
8.6.1 G5-18A
MY2130
HYDRAULIC RESER
VOIR
P
T
Y
LS
P L
R
T
175 bar 235 bar
A
B T
P
CF
EF P
LS
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
2
1
3
T
X2 X1
G
D
T2
Vg max Vg min
U
M1
B A
2
3
4
5
6
9
10
11
15
18
16
19
21
IMPLEMENT PUMP SUCTION
DRIVE MOTOR RETURN
20
14
8
22
13
T
P
1
2
3
4
7
24
P1
P2
P3
P4
P5
P6
JS1
JS2
1B
1A
3B
3A
1b
1a
3a
3b
4B
4A
4a
4b
2B
2A
2a
2b
17
12
1
P T
LIFT
TIL
T
AUX
CROWD
CROWD
AUX
TIL
T
AUXILLAR
Y
OPTIONS
PILOT CONTROLLER RETURN
DRIVE PUMP SUCTION
FILTER RETURN
INCH/STEER VALVE RETURN
FILTER RETURN
FRONT STEERING
CYLINDER
REAR STEERING
CYLINDER FRONT AXLE
DESCRIPTION
DESCRIPTION
MAIN CONTROL
V
AL
VE, W/AUX.
PUMP
, HYDRAULIC (VD)
PUMP
, IMPLEMENT
MOT
OR, HYDRAULIC
VA
LVE, STEER SELECT
VA
LVE, PRIORITY
VA
LVE, PILOT
SELECT
VA
LVE, P
ARK BRAKE RELEASE
VA
LVE, MASTER CYL. BRAKE
JOYSTICK FIL
TER, RETURN
VA
LVE, INCHING
1 2 3 4 5 6 7 8 9 10 11 12
ITEM #
VA
LVE, STEERING
VA
LVE, CHECK (55 PSI)
CYLINDER, LIFT CYLINDER, COMP CYLINDER, CROWD CYLINDER,
TIL
T
HYDRAULIC RESER
VIOR (BUIL
T IN FRAME)
RADIA
TOR, COMBINA
TION W/ HYD. COOLER
AXLE, FRONT
(SER
VICE BRAKE)
AXLE, FRONT
(P
ARK BRAKE)
VA
LVE, CHECK (5 PSI)
13 14 15 16 17 18 19 20 21 22 24
ITEM #