RENR6977
30 Page, (Dimensions:39 inches x 28 inches)
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
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Electrical Symbols (Electrical)
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
T
RENR6977
February 2007
365C Material Handler
Hydraulic System
GWC1-UP
©
2007 Caterpillar
All Rights Reserved
Printed in U.S.A.
Description
Part
Number
Machine
Location
Schematic
Location
Accumulator - Pilot Oil 161-6876 1 B-7
Brake Gp - LH Parking 135-8852 2 F-4
Brake Gp - RH Parking 135-8852 3 F-5
Cylinder Gp - Boom Note A 4 F-6
Cylinder Gp - LH Stick (2) Note A 5 F-1
Cylinder Gp - RH Stick (2) Note A 6 F-1
Cylinder Gp - Stick (1) Note A 7 F-7
Filter Gp - Case Drain (Main Pump / Swing pump) 6E-5534 8 A-6
Filter Gp - Case Drain (SW MTR / Travel MTR / Fan
Pump)
6E-5534 9 A-5
Filter Gp - Pilot Oil 185-0336 10 A-6
Filter Gp - Return 259-0681 11 A-6
Filter Gp - Return 234-4454 12 A-6
Motor Gp - Hydraulic Oil Cooler Fan 247-8978 13 A-5
Motor Gp - LH Swing 234-4525 14 F-2
Motor Gp - LH Travel 147-5784 15 F-4
Motor Gp - RH Swing 234-4627 16 F-3
Motor Gp - RH Travel 147-5784 17 F-5
Pump Gp - Hydraulic Oil Cooler Fan 247-8968 18 A-3
Pump Gp - Main 266-7952 19 A-4
Pump Gp - Pilot 155-9222 20 A-3
Pump Gp - Swing 266-7951 21 A-2
Sensor As - Pressure (1Pump / 2 Pump / 1 Way Flow) 221-8859 22 B-4
Sensor As - Pressure (Boom Cylinder Head End) 221-8859 23 E-6
Sensor As - Pressure (Swing Pump) 221-8859 24 B-2
Switch As - Pressure (Boom Lower) 202-9002 25 E-6
Swivel Gp 156-0622 26 E-4
Tank As - Hydraulic Oil 227-0411 27 A-6
Valve Gp - 1 Way Flow 215-4890 28 F-8
Valve Gp - Check 201-9382 29 B-6
Valve Gp - Check 201-9381 30 B-6
Valve Gp - Check (Stick Cylinder) 233-7881 31 E-8
Valve Gp - Control (Swing) 241-8928 32 E-3
Valve Gp - LH Traction Control 143-8067 33 E-4
Valve Gp - Load Control (Boom Drift) 145-7181 34 C-6
Valve Gp - Load Control (Boom) 206-3314 35 E-6
Valve Gp - Main Control 251-2156 36 C-2 thru C-7
Valve Gp - Manual (Auxiliary Shutoff) 229-5272 37 C-1
Valve Gp - Medium Pressure Control 194-1804 38 D-1
Valve Gp - Pilot Manifold & Reducing 140-0736 39 A-7 & A-8
Valve Gp - RH Traction Control 143-8067 40 E-5
Valve Gp - Solenoids (Medium Pressure Control) 171-0028 41 C-1
Valve Gp - Solenoids (Stick Lowering Cntrl & Boom Load) 171-0028 42 E-8
Valve Gp - Solenoids (Swing Parking Brake) 137-3713 43 F-3
Valve Gp - Stick Lower LH Control ( 2 Stick Cylinders) 282-2400 44 F-2
Valve Gp - Stick Lower RH Control ( 2 Stick Cylinders) 282-2400 45 F-1
Valve Gp - Swing Cushion 267-8146 46 E-2
Screen As - Work Tool 303-9283 50 B-7
Switch As - Pressure (Work Tool Screen) 4Z-6219 51 B-7
Valve Gp - Load Control (Stick Lower) 145-7181 52 C-4
Component Locations
Attachments
Tap Locations
Pressure, Sampling, and Sensor
Tap
Number
Description
Schematic
Location
AA Swing Pump Delivery Pressure B-2
BB Pilot Pump Delivery Pressure B-3
CC Front Pump Delivery Pressure B-4
DD Rear Pump Delivery Pressure B-4
EE Front Pump Load Sense Pressure B-5
FF Rear Pump Load Sense Pressure B-3
GG Front Pump Power Shift Pressure B-5
HH Rear Pump Power Shift Pressure B-3
JJ Pilot Manifold Pressure A-7
KK A1 Solenoid Med Control Pilot Pressure C-1
LL A2 Solenoid Med Control Pilot Pressure C-1
SOS Hydraulic Oil Sampling Port B-3
19
GG
HH
EE
19
19
FRONT
PUMP REG
REAR
PUMP REG
FF
GG
EE
REAR
PUMP REG
FRONT
PUMP REG
FRONT PUMP REAR PUMP
DD
CC
DD
CC
BB
SOS
AA
24 21
18 20
JJ
39
LOCK
PUMPTRAVEL
36
34
26 16
14
32
43
46
2
15
33
3
17
40
19
22
2
15
33
3
17
40
14
32
46
16
43
26 23
28
42
25
31
35 37
24
20
21
18
23
13
10
13
30
42
28
31
25
52
50
51
41
3836
34
29
39
1
39
1
8
27
11
12
10
9
19
22
21
24
18
20
4 45
6
44
5 7
27
11
12
9
8
52
50
51
41
3836
30 34
29
MAIN PUMP
COMPONENT LOCATIONS
MAIN CONTROL VALVE GPPILOT / FAN / SWING PUMPS PILOT MANIFOLD
VIEW A-A
HIGH PRESS
SIGNAL RELIEF
LOW PRESS
SIGNAL RELIEF
HIGH / LOW
RELIEF SOLENOID
SIGNAL
DUPLICATION
TRAVEL
(R)
TRAVEL
(L)
STICK
BOOMBUCKET
ATTCH
KK
41
A2 SOLA1 SOL
MED PRESS CONTROL
38
LL
VIEW B-B
A
A
BB
NEUTRAL BYPASS
SOLENOID
RENR6977
30 Page, Color 2, (Dimensions: 39 inches x 28 inches)
THIS SCHEMATIC IS FOR THE 365C MH
PART #: 261-0308 V00
Components are shown installed on a fully operable machine with the key and engine
off and transmission shifter in neutral.
LINE PATTERNS
Drain / Return Lines
Component Group
Pilot / Load Sensing Pressure
Pressure Line
Attachment
Air Line
CALLOUTS
Taps (Pressure, Sampling,Sensor) by letter
Components by number
YY
52
Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations
DRAIN / RETURN TO TANK
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
MAIN PUMP OUTPUT
SWING PUMP OUPUT
MAIN PUMP POWER SHIFT CONTROL CIRCUIT
PILOT PUMP OUTPUT
RIGHT HAND TRAVEL MOTOR CONTROL CIRCUIT
FAN PUMP OUTPUT
WORK TOOL CONTROL CIRCUIT
MAIN PUMP LOAD SENSE PRESSURE
SWING BRAKE CONTROL CIRCUIT
DRAIN / RETURN TO SUPPLY
MAIN PUMP LOAD SENSE CIRCUIT
SUPPLY LINE
BUCKET CONTROL CIRCUIT
TRAVEL SPEED CONTROL CIRCUIT
STICK CYLINDER CONTROL CIRCUIT
LEFT HAND TRAVEL MOTOR CONTROL CIRCUIT
BOOM CYLINDER CONTROL CIRCUIT
MEDIUM PRESSURE ATTACHMENT CONTROL CIRCUIT
SWING MOTOR CONTROL CIRCUIT
HH
FF
DDCC
EE
GG
AA
SOS
BB
JJ
LL
KK
1
2
3
4
56
7
8
C
D
E
F
1
23
4
56
7
8
A
B
C
D
E
F
B
GRAPPLE
CYLINDERS
VALVE GP
MANUAL
(AUX SHUTOFF)
229-5272
B
A
LS
LS
pA
pB
LS
M
BA
P
A2
TT
A1
P
PT
AL4
R
T1
RIGHT
L'
L'
B' A'
C/V
Dr1
CYL
Pi1
BR
BR
MB
MA
M
MB
A'B'
LEFT
PR
PG
E
F
SWING
L2
D
L1
Qmax Qmin
T1
LEFT
A'
D
F
E
P
T
M2
M1
B'
B A
TRACK
T2
X
T2
BL2
AL2
B
LL1S
PSA3
PSA2
PSA1
PG
PIN
TOUT
DR1
DR2
DR3
Pi5
PAC
Pi3
Pi2
Pi1
Pi4
Pi6
M1
T2T1
R
S
AS
PSA4
DR6
M2
G
aR3
aL3
bR3
bL3
aL1
aR1
bL4
aL4
bR1
PF
PR
bL1
R1
D1
D2
R2
AL4
BR1
R2
ATT
AR1
BL1
AL1
AR3AL3
BL3
RIGHT
T
S1
DR5
BL4
bL2
QmaxQmin
REV
FWD FWD
REV
DOWN
OPEN
B
M2
M2g
A
LS2
LS2g
PS2g
PS2
M2g'
M1g'
PS1g
PS1
aL2
R1
STICK
BUCKET
UP
BOOM
TRAVEL
(L)
TRAVEL
(R)
DR4
LS1g
LS1
SA1
M1g
M1
P2
P1
M
MA
QminQmax
B
A
PD
P1
P2
T
Pi1
CLOSE
X
CYL
Dr1
C/V
P1
P2
Dr
BR3
OUT
SA2
)(
IN
AL3
BL3
Pp
X
T
Dr
C
A
A
C
Dr
T
X
Pp
CONFIGURATION SCRAP YARD
WITH 2 STICK CYLINDERS
BL4PpT
Dr
CONFIGURATION BARGE UNLOADER
B
A
B
A
TO GRAPPLE
CYLINDERS
AL2
BL2
HIGH PRESSURE FILTERS OPTION
A
C
Dr
T
X
Pp
WITH 1 STICK CYLINDER
AL4
BL4
PpT
Dr
T
P
T
P
PUMP GP
SWING
266-7951
PUMP GP
HYD OIL COOLER
FAN
247-8968
SENSOR AS
PRESSURE
(SWING PUMP)
221-8859
PUMP GP
PILOT
155-9222
SENSOR AS
PRESSURE
(1PUMP/2PUMP)
(1WAY FLOW)
221-8859
PUMP GP
MAIN
266-7952
FILTER GP
CASE DRAIN
(SW MTR/TRAVEL
MTR/FAN MTR &
FAN PUMP)
6E-5534
MOTOR GP
HYD OIL COOLER
FAN
247-8978
VALVE GP
CHECK
201-9381
VALVE GP
CHECK
201-9382
FILTER GP
PILOT OIL
185-0336
TANK AS
HYD OIL
227-0411
FILTER GP
CASE DRAIN
(MAIN/SWING
PUMPS)
6E-5534
FILTER GP
RETURN
259-0681
FILTER GP
RETURN
234-4454
ACCUMULATOR
PILOT OIL
161-6876
VALVE GP
PILOT MANIFOLD
& REDUCING
140-0736
VALVE GP
MAIN CONTROL
251-2156
VALVE GP
MAIN CONTROL
251-2156
VALVE GP
CHECK
(1WAY FLOW)
215-4890
VALVE GP
SOLENOIDS
(STICK LOWER
CONTROL &
BOOM LOAD
CONTROL)
171-0028
VALVE GP
STICK LOWERING
CONTROL
282-2400
VALVE GP
CHECK
(STICK CYL)
233-7881
VALVE GP
LOAD CONTROL
(BOOM)
206-3314
SWITCH AS
PRESSURE
BOOM LOWER
202-9002
SENSOR AS
PRESSURE
(BOOM CYL
HEAD END)
221-8859
SWIVEL GP
156-0622
BRAKE GP
LH PARKING
135-8852
MOTOR GP
LH TRAVEL
147-5784
VALVE GP
LH TRACTION
CONTROL
143-8067
VALVE GP
RH TRACTION
CONTROL
143-8067
BRAKE GP
RH PARKING
135-8852
MOTOR GP
RH TRAVEL
147-5784
BOOM
VALVE GP
SOLENOID
SWING PARKING BRAKE
137-3713
MOTOR GP
LH SWING
234-4525
MOTOR GP
RH SWING
234-4627
VALVE GP
CONTROL SWING
241-8928
VALVE GP
SWING CUSHION
267-8146
VALVE GP
STICK LOWER
LH CONTROL
282-2400
VALVE GP
STICK LOWER
RH CONTROL
282-2400
VALVE GP
CONTROL
MEDIUM PRESSURE
194-1804
VALVE GP
SOLENOIDS
MED PRESS
171-0028
LOCK
TRAVEL
R
PUMP
VALVE GP
LOAD CNTRL
(BOOM
DRIFT)
145-7181
ATTCH VALVE GP
LOAD CNTRL
(STICK
LOWER)
145-7181
(NOT SHOWN)
SIGNAL
DUPLICATION
HIGH/LOW
RELIEF
LOW
RELIEF
HIGH
RELIEF
SWITCH AS
PRESSURE
(WORK TOOL
SCREEN PRESSURE)
4Z-6219
SCREEN AS
(WORK TOOL)
303-9283
M
CYLINDER GP
STICK (1)
CYLINDER GP
BOOM
CYLINDER GP
LH STICK (2)
CYLINDER GP
RH STICK (2)
A
DIFF
RELIEF
DIFF
RELIEF
NEUTRAL
BYPASS
