JLG 600A_AJ Parts Manual - Manual (Page 280)

6-10 3120719
SECTION 6 HYDRAULIC
S
E
C
T
I
O
N
6
H
Y
D
R
A
U
L
I
C
FIGURE 6-4. HYDRAULIC DIAGRAM - STANDARD
UPPER
L
IF
T CYL
.
SW
IN
G MOT
O
R
AN
D
BRAK
E
V2
V1
V1
V2
BR
A
K
E
C2
C2
C1 SWING
C/
B
V
A
L V
E
MA
N
U
A
L
DESCENT
VA
L V
E
#1
1
#2
2
#3
3
#4
IN
NORM
AL
PO
SI
TI
O
N
OF
N
E
ED
L
E
V
A
L V
ES
2 -SPE
ED
F
U
N
C
T
IO
N
I
S
U
S
E
D
ONL
Y
O
N
4
-W
D
U
N
IT
S
.
SE
E
4
-W
D
B
M
’S
**
N
O
T
E
**
*
* N
O
T
E
*
*
#
1 OP
E
N
(
C
O
U
N
T
E
R
C
L
OC
K
W
IS
E
)
#
2 OP
E
N
(
C
O
U
N
T
E
R
C
L
OC
K
W
IS
E
)
#
3 CL
OSE
D
(CL
O
CK
WISE)
#
4 OP
E
N
(
C
O
U
N
T
E
R
C
L
OC
K
W
IS
E
)
PO
R
T B
L
OCK
ON U
P
RI
GH
T
LI
F
T C
Y
L
.
PORT B
L OCK
ON
L
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W
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R
LI
F T
C
Y
L
.
LO
C
A
T E D
I N
UP
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G
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V
A
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E
L
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A
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EN
D OF
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W
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R B
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CAM
V
A
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E
L O
CA
T
E
D I
N
SIDE
TU
RN
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BL
E
LO
W
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R
TELE
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T
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TO
R
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TU
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AVE
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L
.
AU
X
. P
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M
P
C
A
SE PO
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T
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AR
P
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T
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N
GEAR PUM
P
RETURN FIL
T E
R
P
O
RT
L
O
CA
T
E
D ON T
H
E
IN
SIDE
O
F
T
H
E F
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T
ER
N
E
X
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TH
E O
IL
T A
N
K
.
RE
A
R
HO
S
E
TO
I
N
LET
OF
F
IL
T
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R
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T IO
N
DRI
V
E
PUMP FI
L T
E
R
UP
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R
CAS
E
PO
R T
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W
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R
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A
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P
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T
IN
OU
T
AU
X
. PU
M
P
SUCTION
PI
ST
ON PU
MP
SUCT
IO
N
LEV EL BAC K
LEV EL FO RW AR D
MA
STER
CY
L .
LO
W
E
R
TE
LE
E
X
T E
N
D
E
C
V
MD
R
V1
V1
T V2
V2
OU
T
IN
PO
R
T BL
O
C
K
ON
L
O
W
E R
TE
L E C
Y L .
V1
V1 P1
V2
V2
2
1
P2
P2
1
2
S
B
A
MD
E
X
T
E
ND
-A
-R
E
A
C
H
CY
L
IN
D
E
R
MA
IN
V
A
L V E
AS
SEM
B
LY
EAR
RET
R
A
C
T
EAR E
X
T E
N
D
REAR STEER
F R
ON
T STEER
REF
E
R TO
DRI
V E C
IR.
REF
E
R T
O
DRIV
E CI
R
.
F R
ON
T STEER
SWING SWING
LI
F
T
U
P
L
IF
T
DOW
N
TE
LE.
C
Y
L
IN
D
E R
HO
L
D
IN
G
V
A
L V E
TE
LE
. E
X
TE
N
D
BA
C
K
S
ID
E
OF
V
A
L V
E
TE
L
E
. R
E
T
R
A
C
T
SWIVE
L
PO
R
T S
SWIVEL PORTS
O
P
P
O
SITE SIDE
OF
M
A
IN
V
A
L V
E
DOT
TE
D
LIN
E
S A
R
E EX
ISTIN
G
COMPON
EN
TS
DENOTE
S A
N
O
N
-STRAI
G
HT HOSE
END
.
POR
T
#7
PO
R
T
#5
SWIVE
L
PORTS
BR
A
K
E
VA
L V
E
1
2
MT
MP
MT
M7
M
7
M3
3
REV
E
RSE FO
R
W
A
R
D
POR
T
#5
PO
R
T
#6
45
44
70
73
36
17
77 18
18
46 35
46 45
46 45
46 35
56 55 45
88
74
7
5
72
82
62
45
64
17
65 9
71
31
30
63
11
1
61
113
79
87
17
56
89
17 44
43
90
42
80
16
44
11
0
81
56
12 56
32
108
10
9
68
46
17
57
46
58 96
96 58
2
7
2
6
5
2
5
3
60 95
6
9
600
A
J
600
A
600
A
J
600
A
95
33 45
2
4
2
5
2
3
2
1
2
2
2
1
6
6
H
Y
D
R
A
U
L
IC
O
IL
T
A
N
K
5
1
4
1
4
7
9 8
6
1
1
1
0
5
2
0
5
0
3
9
8 15
17
76
15 14
1
3 4
1
4
2
1
3
4
2
3
6
9
2
9
1
3
1
0
2
1
0
3
86
36 18
38 39 11
2
100 101
18 77
39 38 40
37 38 39
17
85
84
78
56
106
93
18
17
16
15
13
20
19
14
12
11 M
P1
P
T
9
7
10
M8
8
6
5
3
4
1
2
M4 49
28
50 31 47
38 39 40
31 47
31 47
48
47
49
42
47
54
29
28
10
5
69
68
94
34
94
68
69
56
67
75
74
98
47
107
RE