5
5
View A-A
©
2005 C aterpillar
AllR ights R eserved
Printed inU.S.A.
R EN R 7223
April2005
385C Excavators
Com bined Function
EDA1-UP
KGB1-UP
KBC1-UP
SBE1-UP
T2E1-UP
KKK1-UP
JC M 1-UP
MNZ1-UP
H ydraulic System (A ttachm ent)
ONE PO SITION
TW O POSITION
THREE PO SITION
VENTED PRESSURIZED
RETURN ABO VE FLU ID LEVEL
RETURN BELOW FLUID LEVEL
LINES CROSSING
LINES JO INING
TW O -WAY
THREE-WAY
FOUR-WAY
SPRING
CONTROL VALVES
RESTRICTION
LINE RESTRICTION
(FIXED)
2-SECTION PUM P
MAIN
AUX.
SPRING
(ADJUSTABLE)
VARIABILITY
LINE RESTRICTION
(VARIABLE)
LINE RESTRICTION
(VARIABLE and PRESSURE CO M PENSATED)
PRESSURE
COM PENSATION
PUM P:VARIABLE and
PRESSURE COM PENSATED
ENERGY TRIANG LES
HYDRAULICPNEUMATIC
MEASUREMENT
PRESSURE
TEM PERATURE
FLO W
RO TA TING SH AFTS
UNIDIRECTIONAL BIDIRECTIONAL
PUSH-P U LL LEVER
PEDAL
GENERAL MANUAL
PUSH BU TTO N
SPRING
MANUAL CONTROL SYM BO LS
HYDRAULIC MOTORS
FIXED
DISPLACEM ENT
VARIABLE DISPLACEM ENT
NON-CO M PENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
HYDRAULICPUMPS
FLUID STORAGE RESERVO IRS
CROSSING AND JOINING LINES
VALVE ENVELOPES
VALVE PORTS
BASIC COMPONENT SYM BOLS
FLU ID CONDITIONER
PUM P orM O TO R
FLUIDPOWER SYM BOLS
FIXED
DISPLACEM ENT
VARIABLE DISPLACEM ENT
NON-CO M PENSATED
UNIDIRECTIONAL
BIDIRECTIONAL
VALVES
PILO T CONTROL SYM BO LS
RELEASED PRESSURE
EXTERNAL RETURN
INTERNAL RETURN
REMOTE SUPPLY PRESSURE
SIMPLIFIED
COM PLETE
INTERNAL
SUPPLY PRESSURE
ACCUMULATORS
SPRING LO ADED
GAS CHARGED
SOLENO ID
orM ANUAL
SOLENO ID
and P ILO T
SOLENO ID and
PILO T orM A N U A L
COM BINATION CONTROLS
SOLENO ID
SERVO
THER M AL
DETENT
HYDRAULIC AND PNEUM ATICCYLINDERS
DOUBLE ACTING
SINGLE ACTING
BASIC SYM BO L
SPRING LO ADED
CHECK VALVES
TW O
POSITION
INFINITE
POSITIONING
FLOW INONE
DIRECTION
FLOW ALLOW ED IN
EITHER DIRECTION
THR EE
POSITION
CROSS
FLOW
PARALLEL
FLOW
INTERNAL PASSAGEW AYS
NORM AL POSITION
AB
PT
AB
PT
SHIFTED PO SITION
INFINITE PO SITION
CONTROL VALVES
385C :
Schem atic
Closed Position Tw o Way Flow
View A-A
1
2
5
FrontV iew
Open Position One Way Flow
True Load Signal
A
DETAILA
(Alternate C onnection forD uplicate Load Signal)
PF
PR
LS
PR
PF
LS1g
M1g
P1
PS2
SA1
PS1
PS2g
M1
LS1
PS1g
S1
M2g`
LS2
M2
SA2
P2
M2g
LS2g
M1g`
R2
D1 D2
R1
Q m ax Qmin
Q m ax Qmin
230-2722
1
2
3
4
5
LS
LS
This A ttachm ent Schem aticisintended to
be used in conjunction w ith the Standard
H ydraulic Schem aticinthisService M anual.
H ydraulic Schem atic
230-2723
PILOT LIN E
DRAIN LIN E
MAIN CONNECTOR LIN E
