15
12
6
18
20
25
3
19
14 13
5
9
8
10
11
FF
KENR7620-02 April 2011
EE
FLUID POWER SYMBOLS BASIC COMPONENT SYMBOLS
MAIN AUX.
PUMP or MOTOR
TWO POSITION
HYDRAULIC PNEUMATIC ENERGY TRIANGLES
ATTACHMENT
LINE RESTRICTION VARIABLE and PRESSURE COMPENSATED
VALVE PORTS
TWO-WAY
THREE POSITION
PUMP: VARIABLE and PRESSURE COMPENSATED
2-SECTION PUMP
VALVES
VALVE ENVELOPES
ONE POSITION
LINE RESTRICTION (FIXED)
RESTRICTION
PRESSURE COMPENSATION
LINE RESTRICTION (VARIABLE)
SPRING (ADJUSTABLE)
VARIABILITY
CONTROL VALVES
SPRING
FLUID CONDITIONER
FOUR-WAY
THREE-WAY
CONTROL VALVES
CHECK VALVES
AB
AB
P T SHIFTED POSITION
P T NORMAL POSITION
INFINITE POSITION
SHUTTLE
SPRING LOADED
BASIC SYMBOL
PILOT CONTROLLED
FLUID STORAGE RESERVOIRS
VENTED
RETURN ABOVE FLUID LEVEL
PRESSURIZED
RETURN BELOW FLUID LEVEL
MEASUREMENT
16
7 17 21
1
2
24
9
4 26 23 27 22 28
930H Wheel Loader Hydraulic System
8
PRESSURE
ROTATING SHAFTS
FLOW
TEMPERATURE
UNIDIRECTIONAL
BIDIRECTIONAL
COMBINATION CONTROLS
DHC1-UP FTD1-UP
SOLENOID or MANUAL
SOLENOID
SERVO
SOLENOID and PILOT or MANUAL
SOLENOID and PILOT
DETENT
THERMAL
MANUAL CONTROL SYMBOLS
15
6
12
1
2
20
4
26 19
14 24 29
5
8
10 11
MANUAL SHUTOFF
PUSH-PULL LEVER
GENERAL MANUAL
PILOT CONTROL SYMBOLS
RELEASED PRESSURE
14
EXTERNAL RETURN
INTERNAL RETURN
SPRING LOADED
LINES CROSSING
BB
VARIABLE DISPLACEMENT NON-COMPENSATED
FIXED DISPLACEMENT
HYDRAULIC AND PNEUMATIC CYLINDERS
LINES JOINING
VARIABLE DISPLACEMENT NON-COMPENSATED
UNIDIRECTIONAL
UNIDIRECTIONAL
BIDIRECTIONAL
BIDIRECTIONAL
INTERNAL SUPPLY PRESSURE
COMPLETE
SINGLE ACTING
HYDRAULIC MOTORS
HYDRAULIC PUMPS
SPRING
REMOTE SUPPLY PRESSURE
CROSSING AND JOINING LINES
GAS CHARGED
FIXED DISPLACEMENT
PEDAL
SIMPLIFIED
ACCUMULATORS
TILT CONTROL
PUSH BUTTON
DOUBLE ACTING
INTERNAL PASSAGEWAYS
FLOW IN ONE DIRECTION
TWO POSITION
THREE POSITION
INFINITE POSITIONING
PARALLEL FLOW
CROSS FLOW
FLOW ALLOWED IN EITHER DIRECTION
Printed in U.S.A.
© 2011 Caterpillar All Rights Reserved
CC Electrical Symbols Table Hydraulic Symbols (Electrical)
27
G
13 22 28
9
Transducer (Fluid)
Part Number
Machine Location
Schematic Location
Valve Gp - Ball, Dead Eng. Lwr
112-1817
5
F-7
E-8
Valve Gp - Check
9T-1013
13
F-10, F-11
3
G-6
Valve Gp - Check
263-8476
14
F-10
298-2412
3
G-6
Valve Gp - Check, Back Pressure
294-0932
14
F-9
Cooler - Hydraulic Oil
293-2240
6
B-11
Valve Gp - Check, Cooler Bypass
145-8983
6
B-11
Cooler As - Dual Axle Oil
205-3652
7
C-11
Valve Gp - Check, Clr Bypass W/ Axle Oil Clr 259-0558
6
B-11
Cylinder Gp - Coupler, Fusion
353-9364
11
I-11
Valve Gp - Check, Steering Back Press.
192-2684
14
F-9
Cylinder Gp - Coupler, Standard
190-3085
11
I-9
Valve Gp - Combination, Relief/Diverter
173-4032
14
E-7
Cylinder Gp - Coupler, Wide
188-0982
11
I-9
Valve Gp - Coupler Control
363-7916
14
H-9
Cylinder Gp - Lift
235-6823
8
E-6
Valve Gp - Solenoid, Diff. Lock Control
233-7133
26
G-8
Cylinder Gp - Steering
237-9271
9
I-10, I-12
Valve Gp - Dual Mode Steering
247-4503
13
H-12
Machine Location
Schematic Location
Accumulator Gp - Brake
362-9032
1
D-10
Accumulator Gp - Pilot
243-4398
2
Accumulator Gp - Ride Control
283-4418
Accumulator Gp - Ride Control
Cylinder Gp - Tilt
235-6824
10
E-7
Filter Gp - Bypass
209-3149
12
A-11
Hand Metering Unit
296-6719
13
H-10
Hand Metering Unit - Dual Mode
282-6945
13
H-12
Manifold
242-0265
14
E-9
Motor Gp - Axle Oil Cooler, Pump / Motor
288-4166
15
B-11
Motor Gp - Fan
289-6393
16
B-10
Motor Gp - Reversing Fan
289-6394
16
B-10
Pump Gp - Brake and Fan
288-4162
17
B-10
Pump Gp - Steering / Implement
237-0292
19
C-10
Pump Gp - Supplimental Steering
293-2470
18
E-11
Screen
255-0759
20
A-9
Screen As
299-5499
21
C-11
Sensor Gp - Brake Acc. Press.
224-4536
17
B-9
Sensor Gp - Xmssn Neutralizer
290-5825
22
D-11
Strainer
262-5689
20
A-9
Switch As - Axle Cooler Press.
3E-7690
15
Switch As - Ride Control Disable
126-6916
Switch As - Secondary Steering
Pressure Switch (Adjustable)
Pressure Switch
Component Locations Part Number
Description
Valve Gp - Foot Brake
144-8521 317-6905
Valve Gp - Implement, 2 Section Valve Gp - Implement, 3 Section
317-6907
22
D-11
23
B-4 to D-8 G-1 to I-5
23
B-4 to D-8 G-1 to I-5
Valve Gp - Implement, 4 Section
317-6909
23
B-4 to D-8 G-1 to I-5
Valve Gp - Integrate 3rd Function
262-9706
27
F-2
Valve Gp - Pilot, Joystick
212-1302
4
A-4 to A-7 F-2 to F-4
Valve Gp - Pilot, Joystick and 2 Auxiliary
212-1307
4
A-4 to A-7 F-2 to F-4
Valve Gp - Pilot, 2 Joystick and 2 EH Func.
247-0841
4
A-4 to A-7 F-2 to F-4
Valve Gp - Pilot, Joystick and Auxiliary
212-1305
4
A-5 to A-7 F-2 toF-4
C-11
Valve Gp - Relief
251-0907
25
F-10
23
B-6
Valve Gp - Resolver, Shuttle
8J-6875
14
H-8
230-5771
29
D-9
Valve Gp - Resolver, Shuttle
8J-6875
27
D-9
Tank Gp - Hydraulic
262-5654
20
A-9
Valve Gp - Ride Control
280-9978
3
G-6
Valve Gp - 3rd Func., Cont. Flow
243-0651
27
B-5
Valve Gp - Shutoff, Hydr. Drain
6V-7238
24
E-9
Valve Gp - 5th and 6th Function
242-0117
28
H-7
Valve Gp - Steering Priority
307-3181
29
D-9
IMPLEMENT CONTROL (23)
Description
Schematic Location
AA
Pump Load Sense Pressure
D-9
BB
Implement Pressure
C-8
CC
Pilot Supply Pressure
D-7
DD
Front Brake Pressure
D-11
EE
Tilt Cylinder Rod End Pressure
E-7
FF
Tilt Cylinder Head End Pressure
E-7
GG
Rear Axle Cooler Circuit Pressure
C-11
SOS
Hydraulic Oil Sample Port
A-11
Steering Priority Sense Pressure
D-9
Electrical Wire
Temperature Switch
Electrical Symbols (Electrical)
T
PUMP LOAD SENSING
Pressure Symbol
Temperature Symbol
Level Symbol
Flow Symbol
Wire Number Identification Codes
SOS Electrical Schematic Example
Hydraulic Schematic Example Current Standard
Current Standard
29
HH
14
Harness identification code This example indicates wire 135 in harness "AG".
Wire Circuit Number Identification
12
Wire Color
325-AG135 PK-14 325-PK Circuit Identification Number
Wire Color
Wire Gauge
Previous Standard Wire Color
Wire
325-PK-14 B Circuit Number Identification
HYDRAULIC OIL SAMPLING
DD
Tap Locations Pressure and Sampling
HH
Electric Motor
19
Nore: Always refer to Parts Manual for your specific machine.
Tap Number
Generator
AA
COMPONENT LOCATIONS Description
Transducer (Gas / Air)
M
22 23
FOOT BRAKE
STEERING PRIORITY SIGNAL
A
Wire Gauge (EXAMPLE VALVE)
(Dimensions: 39 inches x 28 inches)
23
3
25
30 Page,
7 17 18 21
KENR7620-02
16