Bobcat 337 & 341 Long Arm Midi Excavator Hydraulic Repair & Troubleshooting Schematic 337 (S/N AAC8 AND ABOVE) 337 (S/N A9W7 AND ABOVE) 341 (S/N A9W9 AND ABOVE)

BOOM OFFSET
CYLINDER
BUCKET
CYLINDER
ARM
CYLINDER
T1
T2
Q1
Q2
PS
RIGHT HAND TRAVEL MOTOR
RIGHT
(FRONT)
LEFT
(REAR)
DUAL SEQUENCE VALVE
WITH SHUTTLE
CROSS PORT BLOCK
SLEW MOTOR
WITH BRAKE
HYDRAULIC/HYDROSTATIC SCHEMATIC
337 (S/N AAC8 AND ABOVE)
337 (S/N A9W7 AND ABOVE)
341 (S/N A9W9 AND ABOVE)
(PRINTED APRIL 2008)
V-0970
LOCKING VALVE
40
29
25
26
27
27
35
6
7
3
1
PUMP SUPPLY
WORKING CIRCUITS
PILOT PRESSURE
SYSTEM RETURN LINES
ENCLOSURE
DIRECT TANK RETURN
1 of 6
Dealer Copy -- Not for Resale
SLEW
OFFSET
BUCKET
ARM
BLADE
AB
AB
AB
AB
AB
P1P
T
D
C
A
B
B1
T1
T2
L
1
G
CASE DRAIN
MANIAFOLD
ASSEMBLY
CONTROL VALVE
45
46
45
47
45
47
45
47
45
47
45
17
16
15
14
36
38
51
50
49
48
39
P2
41
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Dealer Copy -- Not for Resale
1
2
1
2
3
4
T
RH JOYSTICK
P
FRONT
LEFT
RIGHT
REAR
FRONTRIGHT
HYDRAULIC PUMP
MAIN
FILTER
OIL
COOLER
BREATHER
CAP
CASE DRAIN
FILTER
30
28
34
32
31
P2
S
44
42
37
43
X
L2
L1
L
41
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Dealer Copy -- Not for Resale
T1
T2
P1P2
Q1
Q2
PS
BOOM
CYLINDER
FWD
REV
P1P2
PS
FWD
REV
LEFT HAND TRAVEL MOTOR
LEFT HAND BLADE
CYLINDER
RIGHT HAND BLADE
CYLINDER
H
J
H2
J2
B
D
E
C
A
F
A
F
H1
J1
F
A
C
E
D
B
CENTER SWIVEL
JOINT
MALE (RETURN)
FEMALE
(PRESSURE)
2
3
1
2
13
12
GG1
G2
B
2 SPD
Ps
R
PS2
PDB
PDR
PRB
PRR
B1
B2
R2
R1
T
CENTER SWIVEL JOINT CONNECTIONS
(WHEN EQUIPPED WITH ANGLE BLADE OPTION)
H1
RIGHT HAND BLADE
CYLINDER
LEFT HAND BLADE
CYLINDER
ANGLE BLADE
CYLINDER
F
J1
H
F
A A
ANGLE BLADE DIVERTER VALVE (OPTION – REQUIRES
PWM ON PILOT MANIFOLD 2 SPD)
58
60
57
57
59
J
4 of 6
Dealer Copy -- Not for Resale
ARM
BOOM
AUXILIARY
R. H. TRAVEL
L. H. TRAVEL
AB
AB
AB
AB
AB
3
4
1
2
T
TRAVEL CONTROL
P
L3 ISO
US OPTION
ISO/STD CONVERTER
(ISO SHOWN)
R
1
I
SO
R1
R3
BACK
FRONT
S
TD
ISO
R
3
I
SO
L1 ISO
L1
L3
45
47
45
47
46
10
46
4
5
8
22
24
23
33
11
21
20
19
18
17
9
5 of 6
Dealer Copy -- Not for Resale
2
3
4
T
LH JOYSTICK
P
FRONTRIGHT
REAR
LEFT
V-0970 (4/15/08)
P
LS
T
HYDRAULIC X-CHANGE
(OPTIONAL)
52
54
53
55
56
6 of 6
Dealer Copy -- Not for Resale
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