JLG 800A_AJ Parts Manual - Manual (Page 258)

6-14 800A 800AJ 3121854
SECTION 6 HYDRAULIC
FIGURE 6-4. DRIVE HYDRAULIC DIAGRAM - 4WD/2WS (SN 0300069000 TO SN 0300083332)
1
2
3
C
C
C
LE
F
T
REA
R
DR
IVE MOTOR
LE
F
T
F
R
O
N
T
DR
IVE M
O
TOR
DU
A
L
RE
V
E
RS
E
FL
OW DIVIDER
/C
O
MBIN
E
R
FOR
W
A
R
D
FL
OW DI
VI
DE
R/
CO
MB
IN
E
R
1
M3
M
4
M2
M1 B
FR
EE
FL
O
W
A 5
6
1
4
P
3 42
5
REA
R
AXLE
FRONT
AXL
E
RI
GHT
RE
AR
DR
IVE MOTOR
RI
GHT
F
R
O
N
T
DR
IVE M
O
TOR
MA
IN
CO
N
T
RO
L
VA
L
V
E
S
T
E
E
R
C
Y
L
.
S
T
E
E
R
C
Y
L
.
C
C
C
BRA
K
E
BR
A
K
E
RE
A
R
PO
R
T
#
5
RE
V
E
R
S
E
FR
O
N
T
POR
T
#
7
CA
SE D
R
A
IN
RE
A
R
POR
T
#
1
POR
T
#
3
S
T
EER
PO
R
T
#
4
STE
E
R
POR
T
#6
FOR
W
A
R
D
FR
ON
T
PO
R
T
#1
RE
AR
PO
R
T
#
7
CA
S
E
D
R
A
IN
AUX
PO
R
T
#
5
FR
ON
T
POR
T
#
5
RE
A
R
PO
R
T
#
2
FR
ON
T
PO
R
T
#2
X
X
X X
X
X
X
X
XX
X
BRA
K
E
B
R
A
K
E
S
S
S
S
B
B
DR
IVE P
U
MP
A
U
X
P
U
M
P
S
U
C
T
IO
N C
A
S
E
D
R
A
IN
R
E
T
U
R
N
F
IL
T
E
R
O
U
T
H
Y
D
R
A
U
L
IC
O
IL
T
A
N
K
D
R
IV
E
P
U
M
P
S
U
C
T
IO
N
C
Y
L
IN
D
E
R
P
U
M
P
S
U
C
T
IO
N
BR
A
K
E
VA
L
V
E
SU
C
T
ION
DR
IVE P
U
M
P
CH
ARG
E
NO
T
E
:
RE
M
O
VE O
-R
ING
P
L
U
G
S & IN
ST
ALL
#14
UPP
E
R
CA
SE
PO
R
T
L
O
WER
CA
SE
PO
RT
B
B
B
A
A
A
2-
SP
EED
VA
L
V
E
A
A
SWIVEL P
ORTI
N
G
***IMPORT
A
N
T
***
T
H
IS H
O
SE
M
U
ST
CON
N
EC
T
TO TH
E R
E
A
R
PORT
ON
DRIVE
P
U
MP
&
TO
TH
E I
N
LE
T
P
O
R
T
OF C
H
ARGE
FIL
T
E
R
.
*
**IMPORT
A
NT***
FOR
CIRC
UIT TROUB
L
E SHOOT
ING
RE
FER T
O
HY
DRA
U
L
IC
SCH
E
MA
T
IC
27
923
51
X
-- D
E
N
O
T
E
S
A NO
N-
ST
RAI
G
H
T
HOSE
EN
D
7
3
3 3
3
7
6
38
68
3
9
86
13
12
37
39
3
4
4
11
25
49
87
24
48
48
1 2
2
1 2
1 2
1 2
1 2
1 2
6
44
43
42
40
45
35
35
36
4
32
1
4
3
2
61
62
14
33
68
1 19
15
18
65
69
71
2
9
7
2
73
2
0
70
7
17 16 1
66
25
11
3
26 27
34
19
63
29
64
4
30 30
60
28
28
31
55
51
1
3
5
3
5
2
1
1
1
1
7
8
4
8
1
8
3
8
4
4
6
8
4
7
8
7
7
7
6
7
4
7
9
7
6
8
1
7
9 7
5
7
5
7
4 7
4
8
3
7
6
5
0
5
0
51
1
2
56
57 54
59
58
8
22
2
2
89
89
9
9
6
6
1
0
1 19
21 23
14
41
5
47
REF
. HYD
.
LO
C
K
O
U
T
D
IA
.