©
2002 Caterpillar
All Rights Reserved
Printed in U.S.A.
This attachment schematic is to be used in conjunction with the Standard Schematic in this Service Manual.
RENR5399
October 2002
345B Series II Excavators
Hydraulic Variable Gage Undercarriage
CCC1-UP
Hydraulic System - Attachment
B A
DR1
MU
SWING
MOTOR
PG1
SWING
MOTOR
MU
DR2
AB
PG2 PG3
B
STICK
SWING
BOOMBUCKET
JR1
JR3
JR4
JR2
JRT
JRP
JL2
JL4JL1
JL3
JLT
JLP
AR1
BR1
AL2BL2
X
DR
HL
dL5
aL5
BL4
bL4
AL3
BL3aL3
bL2
AL1
BL1
aL1
PSW
aR1
aR2
AR2
BR2
bR3
aR4
Y
HR
AR4
R1
dSW
bR2 bR1 PLPR
Pp1
bL1
PAT
aL2 bL3 aL4
BOOM(1)
BUCKETATCH
TRAVEL(R)
PiL
aR3dR4
SA5
SA4 SA3
SA2
SA1
SB5
SB4
SB3
SB2
SB1
SP
SWING
L
L1
S
C
B
A
Pi3
)(
T
Pi1
Pi2
214B214A
Dr
Pi
P2
P1
P1
P2
R1
4
3
ST
dR5
Dr
2
A2
A1
1
T2
T1
Dr1
OWD
X1X2Dr2
Bd1
Bd2
AB
C
T
P2
Pi
A
Dr
X
A
Pi
)(
)(
)(
P1
)(
Dr
AR3
R1
S
R2
X1
X2
M3
X3
A1
M1
A2
M2
R1
A3
T1
RIGHT
L'L'
BR3
R2
B' A'
S2
BR
R3
X
BR
MB
MA
MB
A'B'
T1
LEFT
APi2
A'
PP2
Pi8
PSA
PG
B'
STICK(1)
STICK(2)
BOOM(2)
TRAVEL(L)
TOUT
DR1DR2DR3
B
A
DR4
DR5
DR6
(SLOW)
Pi3
(TRAVEL)
(SWING)
PIN
BUCKET
CYLINDER
PEU
(PUMP)
Pi1
Pi2C/V
TRACK
JPi
Pi5
(RELIEF)
T2
PTA
X
T2
C
MA
TT
TP
TRAVEL(R)
PAC
TRAVEL(L)
TLA1
TLA2 TRA2
TRA1
B
X
PSL
A
X
BOOM
CYLINDERS
STICK
CYLINDER
APi
ADr
AL4
PILOT LINE
DRAIN LINE
This Attachment Schematic is intended to
be used in conjunction with the Standard
Hydraulic Schematic in this Service Manual.
Hydraulic Schematic
MAIN CONNECTOR LINE
213-6480
1
Item
No.
Description
ATTACHMENT COMPONENTS
2
3
4
Swivel
Track Cylinders
Track Cylinders Control Valve
Pressure Reducing Valve
1
2 2
3
4
1
2
2
43
f06859
