v638 Hydraulic Schematic v-0838-8

OIL COOLER
A
B
P
T V
A
B
T
a b
0
P
FRAME LEVELLING CYLINDER
FRAME LEVELLING HYDRAULIC BLOCK
A
B
QUICK
COUPLERS
EV51
BUCKET PINS
SECONDARY AUX.
VALVE (OPTIONAL)
C2
C3
C1
C4
(PRINTED August 2006)
V-0838
HYDRAULIC SCHEMATIC
V638 (S/N A2ZV11001 AND ABOVE)
(S/N A2ZW11001 AND ABOVE)
3
4
53
53
52
51
49
48
50
1 of 8
Dealer Copy -- Not for Resale
M2 M1
L1
S
L2
A
B2
B1
T
HYDRAULIC FILTER
OIL COOLER
COOLING MOTOR
HYDROSTATIC PUMP
RESERVOIR
PERKINS 1104C-44T
MAX 2400 RPM
74.5 kW @ 2200 RPM
412 Nm @ 1400 RPM
MIN 800 PRM
B
C
A
1
2
3
4
5
47
54
55
11
14
13
15
2 of 8
Dealer Copy -- Not for Resale
M4
M5
M3
3/1
3/1
3/1
C2
V2
pil
TILT CYLINDER
TELESCOPIC
CYLINDER
SELF LEVELLING CYLINDER
HYDROSTATIC PUMP
C1
C2
AC
C
V1V2
4/1
BOOM
CYLINDER
9
10
8
28
6
7
44
44
3 of 8
Dealer Copy -- Not for Resale
SPOOL VALVE BLOCK
A
T
A
T
A1B1
b
a
a
A2B2
b
A3B3A4B4
Y
t
TELESCOPIC
CYLINDER
SPOOL
AUXILIARY
SPOOL
TILT
CYLINDER
SPOOL
BOOM
CYLINDER
SPOOL
B
T
B
T
V1V2
6
7
19
19
20
21
22
19
23
19
24
24
24
24
4 of 8
Dealer Copy -- Not for Resale
MA
A P T
U
X
L R LS T P
SERVICE BRAKE
STEERING UNIT
FRONT AXLE
HYDROSTATIC MOTOR
;
n
M2
M1
N
M3 M4
MAX.
DISP.
M5
HYDROSTATIC
BY-PASS
VALVE
43
41
40
36
36
35
34
5 of 8
Dealer Copy -- Not for Resale
IN
IN
OUT LS
CF
EF
B
U
X
C1
MA
C2
C3 C4
C5
C6
C7
HYDROSTATIC MOTOR
GEAR PUMP
A
;
M4 L2
A
XA
XB
BL1
MAX.
DISP.
ACCUMULATOR
AUXILIARY
PRESSURE
RELEASE VALVE
38
39
42
37
34
33
31
32
46
17
16
18
MS
ACCUMULATOR
CHARGING
VALVE
PASSIVE BRAKE AND
PASSIVE BRAKE VALVE
6 of 8
Dealer Copy -- Not for Resale
EF
A
REAR AXLE
STEERING VALVE
C1 C2 C
3
C8
C9
C7
1
A B
BLOCK
T
P
A
B
AUXILIARY
PRESSURE
RELEASE VALVE
45
12
7 of 8
Dealer Copy -- Not for Resale
C
P T
1
Prop. 1
Prop. 2
A1 A2
B1 B2 4
3
2
P
T
INTERSECTION OF HYDRAULIC LINES
INDICATED BY JUNCTION DOT
PUMP SUPPLY
WORKING CIRCUITS
PILOT PRESSURE
SYSTEM RETURN LINES
ENCLOSURE
DIRECT TANK RETURN
LOAD SENSE
JOYSTICK
CONTROL VALVE
C
1 C2 C3 C4
C10
C8
C
9
C7 C6 C5
DRAIN
BLOCK
Y
pst
M
T1
P
LS
T
V-0838 (8-14-06)
29
19
26
27
25
30
8 of 8
Dealer Copy -- Not for Resale