©
2004 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR7048
July 2004
365B Series II Excavators
Ultra High Demolition
Hydraulic System - Attachment
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)
VARIABILITY
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
JMB1-Up
Schematic
1
2
3
5
6
4
7
8
9
10
11
12
13
14
15
D
D
RIGHT TRACK
Pb
AM
BM
BM
AM
Pb
G
G
X
X
LEFT TRACK
X
X
P
P
Dr
STICK CYLINDER
T
C/V
Dr1
Pi1
P
T
T
Pi1
Dr1
C/V
SINGLE
DOUBLE
DOUBLE
SINGLE
0.6
0.6
B
A
LS
LS
pA
pB
P
210
T
LS
T
T
P
P
210
M
B
LS
p
p
LS
P
A2
T
T
A1
P
A
210
180
180
C
D
LS
LS
C
D
210
180
180
P
P
t
T
t
p2
p1
LS
T
P
FORE-BOOM CYLINDER
3
2
1
p
t
P1
Dr
)(
Pp
D
BL4
AL4
Pp
D
BL4
AL4
A
Pp
T
D
C1
B
A
ATTACHMENT
R
M
LEFT
BOOM CYLINDER
BUCKET CYLINDER
PR
PG
E
F
SW ING
L2
D
L1
Qmax
Qmin
D
F
E
P
T
M2
M1
B
P2
REV
FWD FWD
A
REV
M1
T2T1
R
S
AS
M
G
aR3
aL3
bR3
bL3
aL1
aR1
bL4
aL4
bR1
PF
PR
bL1
R1
D1
D2
R2
AL4
BR1
R2
ATT
AR1
BL1
AL1
AR3
BR3
AL3
BL3
RIGHT
S1
BL4
dR1
bL2
QmaxQmin
M2
M2g
VM2
LS2
LS2g
PS2g
PS2
M2g'
M1g'
PS1g
PS1
aL2
R1
STICK
BUCKET
UP
BOOM
TRAVEL
(L)
TRAVEL
(R)
LS1g
LS1
VM1
SA1
M1g
M1
P2
P1
M
Qmin
Qmax
B
A
CLOSE
PD
P2
DOWN
OPEN
SA2
OUT
IN
C1'
TILT CAB CYLINDER
C2'
V2
V1
C2
C1
PSA3
PSA2
PSA1
PG
PIN
TOUT
DR1
DR2
DR3
Pi5
PAC
Pi3
Pi2
Pi1
Pi4
Pi6
PSA4
DR6
DR5
DR4
B
L
L1
S
This Attachment Schematic is intended to
be used in conjunction with the Standard
Hydraulic Schematic in this Service Manual.
Hydraulic Schematic
234-2777
PILOT LINE
DRAIN LINE
MAIN CONNECTOR LINE
