RENR9456
16 Page
RENR9456
July 2007
365B L Excavators and 365B Material
Medium Pressure
CTY1-402
9PZ1-474
9TZ1-530
©
2007 Caterpillar
All Rights Reserved
Printed in U.S.A.
Handler 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 PEDALGENERAL 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
A B
P T
A B
P T
SHIFTED POSITION
INFINITE POSITION
CONTROL VALVES
ATTACHMENT
MANUAL SHUTOFF
SHUTTLE PILOT
CONTROLLED
Hydraulic Symbols (Electrical)
Electrical Symbols Table
325-AG135 PK-14
Circuit Identification
Number
Wire Color
Wire Gauge
Harness identification code
This example indicates
wire 135 in harness "AG".
325-PK-14
Wire Gauge
Wire Color
Circuit Number
Identification
Wire Number Identification Codes
Current Standard
Previous Standard
Electrical Schematic Example
Hydraulic Schematic Example
325-PK
Wire Color
Circuit Number
Identification
B
A
Wire
Wire
(EXAMPLE VALVE)
Current Standard
Transducer
(Fluid)
Transducer
(Gas / Air)
G
Generator
Electrical Wire
Pressure Switch
M
Electric Motor
Pressure Switch
(Adjustable)
Temperature Switch
T
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Electrical Symbols (Electrical)
RENR9456
16 Page, B/W
4
1
3
2
R
T1
RIGHT
L'
L'
B' A'
BR
BR
MB
MA
M
MB
A'B'
STICK CYLINDER
LEFT
BOOM CYLINDER
BUCKET CYLINDER
PR
PG
E
F
L2
D
L1
Qmax Qmin
T1
LEFT
A'
D
F
E
P
T
M2
M1
B'
B
P1
P2
Dr
A
TRACK
T2
X
T2
BL2
AL2
B
L
L1
S
PSA3
PSA2
PSA1
PG
PIN
TOUT
DR1
DR2
DR3
Pi5
PAC
Pi3
Pi2
Pi1
Pi4
Pi6
M1
T2T1
R
S
AS
PSA4
DR6
M
G
aR3
aL3
bR3
bL3
aL1
aR1
bL4
aL4
bR1
bL1
P
R1
D1
D2
R2
AL4
BR1
R2
ATT
AR1
BL1
AL1
AR3
BR3
AL3
BL3
RIGHT
S1
DR5
BL4
bL2
QmaxQmin
B
M2
M2g
A
LS2
LS2g
PS2g
PS2
M2g'
M1g'
PS1g
PS1
aL2
R1
STICK
BUCKET
BOOM
TRAVEL
(L)
TRAVEL
(R)
DR4
LS1g
LS1
SA1
M1g
M1
P2
P1
P
)(
)(
M
MA
QminQmax
B
A
PR
PD
P1
P2
REV
FWD
Dr
FWD
REV
DOWN
OPEN
UP
CLOSE
X
PF
OUT
SA2
IN
Hydraulic Schematic
191-1965
PILOT LINE
DRAIN LINE
MAIN CONNECTOR LINE
This Attachment Schematic is intended to be used in conjunction with the
Standard Hydraulic Schematic in the Service Manual.
Item
No.
Description
ATTACHMENT COMPONENTS
1
2
3
4
Gear Pump
Medium Pressure Valve
Solenoid Valve Gp
Housing
B
A
LS
LS
pA
pB
LS
M
BA
P
A2
TT
A1
P
P
T
