Fine Filtration
RENR7226
June 2005
385C Excavator
EDA1-UP
KGB1-UP
KBC1-UP
SBE1-UP
T2E1-UP
KKK1-UP
JCM1-UP
MNZ1-UP
©
2005 Caterpillar
All Rights Reserved
Printed in U.S.A.
Hydraulic System (Attachment)
Schematic
RENR7226
16 Page, B/W
ONE POSITION
TWO POSITION
THREE POSITION
VENTED
PRESSURIZED
RETURN ABOVE FLUID LEVEL
RETURN BELOW FLUID LEVEL
LINES CROSSING
LINES JOINING
TWO-WAY
THREE-WAY
FOUR-WAY
SPRING
CONTROL VALVES
RESTRICTION
LINE RESTRICTION
(FIXED)
2-SECTION PUMP
MAIN
AUX.
SPRING
(ADJUSTABLE)
VARIABLILTY
LINE RESTRICTION
(VARIABLE)
LINE RESTRICTION
(VARIABLE and PRESSURE COMPENSATED)
PRESSURE
COMPENSATION
PUMP: VARIABLE and
PRESSURE COMPENSATED
ENERGY TRIANGLES
HYDRAULIC PNEUMATIC
MEASUREMENT
PRESSURE
TEMPERATURE
FLOW
ROTATING SHAFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-PULL LEVER
PEDAL
GENERAL MANUAL
PUSH BUTTON
SPRING
MANUAL CONTROL SYMBOLS
HYDRAULIC MOTORS
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
HYDRAULIC PUMPS
FLUID STORAGE RESERVOIRS
CROSSING AND JOINING LINES
VALVE ENVELOPES
VALVE PORTS
BASIC COMPONENT SYMBOLS
FLUID CONDITIONER
PUMP or MOTOR
FLUID POWER SYMBOLS
FIXED
DISPLACEMENT
VARIABLE DISPLACEMENT
NON-COMPENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILOT CONTROL SYMBOLS
RELEASED PRESSURE
EXTERNAL RETURN
INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED
COMPLETE
INTERNAL
SUPPLY PRESSURE
ACCUMULATORS
SPRING LOADED
GAS CHARGED
SOLENOID
or MANUAL
SOLENOID
and PILOT
SOLENOID and
PILOT or MANUAL
COMBINATION CONTROLS
SOLENOID
SERVO
THERMAL
DETENT
HYDRAULIC AND PNEUMATIC CYLINDERS
DOUBLE ACTING
SINGLE ACTING
BASIC SYMBOL
SPRING LOADED
CHECK VALVES
TWO
POSITION
INFINITE
POSITIONING
FLOW IN ONE
DIRECTION
FLOW ALLOWED IN
EITHER DIRECTION
THREE
POSITION
CROSS
FLOW
PARALLEL
FLOW
INTERNAL PASSAGEWAYS
NORMAL POSITION
AB
PT
AB
PT
SHIFTED POSITION
INFINITE POSITION
CONTROL VALVES
RENR7226
16 Page,B/W
1
LS
Hydraulic Schematic
239-8830
PILOT L INE
DRAIN LINE
MAIN CONNECTOR LINE
Attachment Components
Item No.
1
LS
Description
Hydraulic Oil Filter - Fine Filtration
Load Sensing Signal
STICK CYLINDERBUCKET CYLINDER
BOOM CYLINDER
TRAVEL MOTOR ( LEFT )TRAVEL MOTOR ( RIGHT )
SWING MOTOR ( REAR ) SWING MOTOR ( FRONT )
IN
OUT
Pi6
Pi5
Pi4
Pi3
Pi2
Pi1
PSA4
PSA3
PSA2
PSA1
PAC
PG
DR1
DR2
DR3
DR4
DR5
DR6
PIN
TOUT
Qmax Qmin
AS
R
T1
T2
L1
L2
M1
S
DR
DR1
S
A
M
G
PS1
a1
P1
P2
a2
PSg
LS2
D2B1D1
LS1
AR3
BR3
BL4AL4BL3 AL3
PF
PR
BL1
AL1 AR1
BR1
BL3 AL3 AR3
BR3
PF
PR
AL4
BL4 BR1 AR1 BL1 AL1
L2
L3
DR
DR1
A
B
DR
DR1
L2
L3
B
A
FWD
FWD
IN
REV
REV
OUT
STICK
TRAVEL(L)
TRAVEL(R)
CLOSE
UP
OPEN
DOWN
BOOM
BUCKET
ATCH
LS
bL1bR1aL4
aL1aR1bL4
DR4DR5
R2
DR3
PS3
DR1
aR3aL3aL2
bR3bL3bL2
R1
DR2
PS2
DR4PS4
BL2 AL2
PR
PD
PG1
PG2
DB
PB
M
B
A
PA
M1 M2
SDr1
SP
TP SDr2
R
M
PA
PB
PG
DB
Pi
Dr
Dr
BG
B
A
AG
Pi
PG
A
B
P
Pi
Dr
Dr
BG
B
A
AG
Pi
P
PG
B
A
