©
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.
RENR5417-01
April 2002
385B Excavators
Fine Filtration
BKX1-UP
BLY1-UP
Hydraulic System (Attachment)
RIGHT
C
STICK CYLINDER BOOM CYLINDERBUCKET CYLINDER
PRPB
E
F
SWING
PR
A
Dr
B
Dr
Pi
Pi
Pa
Pb
L2
D
L1
Qmax Qmin
LEFT
D
F
E
P2
Dr
TRACK
BL2
AL2
PSA3
PSA2
PSA1
PG
PIN
TOUT
DR1
DR2
DR3
Pi5
PAC
Pi3
Pi2
Pi1
Pi4
Pi6
M1
T2T1
R
S
A
PSA4
DR6
M
G
aL3
bL3
D1
D2
AL4
BR1
R2
ATT
AR1
BL1
AL1
AR3AL3
PSga2a1
DR5
BL4
A
B
bL2
PF
PR
LS2
B
L1
PS1
B
A
L
R1
STICK
BUCKET
S
BOOM
TRAVEL
(L)
TRAVEL
(R)
DR4
LS1
SA1
P2
Pb
Pa
Pi
Pi
Dr
P1
)(
)(
C
REV
FWD FWD
FRONT
REV
aL1
P
T
aR1
bL4
B
M2
Dr
aL4
A
bR1
P1
P2
M1
bL1
OUT
IN
Dr
REAR
B
P1
aR3
bR3
bL3
BR3
BL3
aL2
UP
CLOSE
DOWN
PR
B1
OPEN
A
NN
SA2
MAIN CONNNECTOR LINE
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
190-7724
P
1
2
1
2
Item
Component
No.
ATTACHMENT COMPONENTS
1
2
1
2
Hydraulic Oil Filter
Check Valve
f05391
