Bobcat 418 Mini Excavator Hydraulic Repair & Troubleshooting Schematic 418 S/N AB4711001 AND ABOVE

RH TRAVEL
BOOM
BUCKET
BOOM SWING
A
B
A
B
A
B
B
A
B
A
A
B
B
A
BLADE
B
A
EXPAND
CYLINDER
SLEW
CENTER
SWIVEL JOINT
E
A
B
H
C
D
E2
H2
H1
A
B
C
D
F
F
BUCKET
CYLINDER
HYDRAULIC/HYDROSTATIC SCHEMATIC
418 S/N AB4711001 AND ABOVE
(PRINTED AUGUST 2010)
V-1213
18
15
21
22
23
B
A
AUX
LH TRAVEL
ARM
16
BOOM
CYLINDER
E1
GG
BLADE
CYLINDER
FEMALE
(PRESSURE)
MALE
(RETURN)
AUXILIARY
HYDRAULIC
COUPLERS
TWO WAY
FLOW
(OPTIONAL)
BOOM
SWING
CYLINDER
ARM
CYLINDER
SLEW
MOTOR
P2
P1
J2
J1
TRACK
EXPAND
VALVE
J
PS
19
UPPERSTRUCTURE
TURNS CCW
UPPERSTRUCTURE
TURNS CW
A
B
20
20
20
20
20
20
20
20
17
17
24
25
P2
P1
T1
L.H. TRAVEL MOTOR
PS
25
24
R.H. TRAVEL MOTOR
T1
TWO
SPEED
VALVE
FEMALE
(PRESSURE)
MALE
(RETURN)
AUXILIARY
HYDRAULIC
COUPLERS
ONE WAY
FLOW
(STANDARD)
27
26
28
1 of 2
Dealer Copy -- Not for Resale
ISO
STD
FRON
T
BACK
P1
RH TRAVEL
BOOM
BUCKET
BOOM SWING
BLADE
1
4
3
2
1
4
3
2
T1
P2
PUMP 1
PUMP 2
F
T
V1
V2
PS1
PS2
P
T
RH JOYSTICK
T
LH JOYSTICK
P
INTERSECTION OF
HYDRAULIC LINES
INDICATED BY JUNTION DOT
PUMP SUPPLY
WORKING CIRCUITS
PILOT PRESSURE
SYSTEM RETURN LINES
ENCLOSURE
OIL COOLER
(OPTIONAL – INSTALL
KIT FOR BREAKER
APLICATIONS)
RESERVOIR
FILL CAP
HYDRAULIC
PUMP
V-1213 (7-29-10)
5
9
13
8
13
10
11
12
7
6
2
1
4
3
18
15
FILTER W/ BY-PASS
AUX
LH TRAVEL
ARM
16
19
13
R3
R1
L1
L3
R3
ISO
R1
ISO
L1
ISO
L3
ISO
STD / ISO
VALVE
14
BUILD-UP
VALVE
PB
CV T
PB
28
2 of 2
Dealer Copy -- Not for Resale
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