KENR7620-02
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
AB
PT
AB
PT
SHIFTED POSITION
INFINITE POSITION
CONTROL VALVES
ATTACHM ENT
MANUAL SHUTOFF
SHUTTLE PILOT
CONTROLLED
T
KENR7620-02
April 2011
930H Wheel Loader
Hydraulic System
DHC1-UP
FTD1-UP
©
2011 Caterpillar
All Rights Reserved
Printed in U.S.A.
Nore: Always refer to Parts Manual for your specific machine.
Description
Part
Number
Machine
Location
Schematic
Location
Description
Part
Number
Machine
Location
Schematic
Location
Accumulator Gp - Brake 362-9032 1 D-10 Valve Gp - Ball, Dead Eng. Lwr 112-1817 5 F-7
Accumulator Gp - Pilot 243-4398 2 E-8 Valve Gp - Check 9T-1013 13 F-10, F-11
Accumulator Gp - Ride Control 283-4418 3 G-6 Valve Gp - Check 263-8476 14 F-10
Accumulator Gp - Ride Cont
rol 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, Standard 190-3085 11 I-9
Valve Gp - Check, Steering Back Press. 192-2684 14 F-9
Cylinder Gp - Coupler, Wide 188-0982 11 I-9
Valve Gp - Combination, Relief/D
iverter 173-4032 14 E-7
Cylinder Gp - Lift 235-6823 8 E-6
Valve Gp - Coupler Control 363-7916 14 H-9
Cylinder Gp - Steering 237-9271 9 I-10, I-12
Valve Gp - Solenoid, Diff. Lock Control 233-7133 26 G-8
Cylinder Gp - Tilt 235-6824 10 E-7
Valve Gp - Dual Mode Steering 247-4503 13 H-12
Filter Gp - Bypass 209-3149 12 A-11
Valve Gp - Foot Brake 144-8521 22 D-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
Valve Gp - Integrate 3rd Function 262-9706 27 F-2
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 C-11
Switch As - Ride Control Disable 126-6916 23 B-6
Valve Gp - Relief 251-0907 25 F-10
Switch As - Secondary Steering 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
317-6905 23
Component Locations
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 - Implement, 3 Section 317-6907 23
B-4 to D-8
G-1 to I-5
Valve Gp - Implement, 2 Section
Valve Gp - Pilot, Joystick 212-1302 4
A-4 to A-7
F-2 to F-4
Valve Gp - Pilot, Joystick and 2 Auxiliary 212-13
07 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
Tap Locations
Pressure and Sampling
Tap
Number
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
HH Steering Priority Sense Pressure D-9
Cylinder Gp - Coupler, Fusion 353-9364 11 I-11
Valve Gp - Resolver, Shuttle 8J-6875 H-814
EEFF
TILT CONTROL
14
BB
HYDRAULIC OIL SAMPLING
SOS
FOOT BRAKE
DD
22
STEERING PRIORITY SIGNAL
COMPONENT LOCATIONS
16
16
15
15
12
177
177
6
621
21
18
18
20
20
24
14
3
3
4
23
23
14
24
22
22
13
13 9
9
5
8
8
8
10
10
11
11
25 19
9
5
21
12
19
21 25
264
26
AA
PUMP LOAD SENSING
CC
IMPLEMENT CONTROL (23)
HH
19
29
12
27
27 28
28
23
14
29
KENR7620-02
30 Page, (Dimensions: 39 inches x 28 inches)
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
DRAIN / RETURN LINE
HYDRAULIC CIRCUIT COLOR DESCRIPTIONS
IMPLEMENT AND STEERING PUMP OUTPUT
STEERING CIRCUIT
PILOT CIRCUIT
SECONDARY STEERING PUMP OUTPUT
FAN CONTROL CIRCUIT
BRAKE COOLING CIRCUIT
4TH FUNCTION CONTROL CIRCUIT
SUPPLY LINE
COUPLER CYLINDERS AND CONTROL CIRCUIT
TILT CYLINDER CONTROL CIRCUIT
BRAKE CONTROL CIRCUIT
IMPEMENT AND FAN PUMP PILOT CIRCUIT
DIFFERENTIAL LOCK CONTROL CIRCUIT
ELECTRICAL CIRCUITS
6TH FUNCTION CONTROL CIRCUIT
5TH FUNCTION CONTROL CIRCUIT
3RD FUNCTION CONTROL CIRCUIT
LIFT CYLINDERS AND RIDE CONTROL CIRCUIT
Components are shown installed on a fully operable machine with the key and engine off, transmission shifter
in neutral and with parking brake set.
Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
SCHEMATIC PART NUMBER: 289-8917, CHANGE: 03, VERSION: -
MEDIA NUMBER: KENR7620-02
THIS SCHEMATIC IS FOR THE 930H WHEEL LOADER HYDRAULIC SYSTEM
A
B
C
D
E
F
G
H
I
123456789101112
123456789101112
A
B
C
D
E
F
G
H
I
13
13
AXLE OIL
RACKBACK
LOWER /
FLOAT
DUMP
WIRED TO CONTROLLER
RAISE
FORWARD
BACK
T
LS
P
RACK
BACK
HOLD
DUMP
RAISE
HOLD
LOWER
FLOAT
OPEN/RAISE
HOLD
CLOSE/LOWER
OPEN/RAISE
HOLD
CLOSE/LOWER
a1
b1
a2 b2
b3
a4 b4
A1 B1 A2 B2
A3
B3
A4
B4
a3
TO THIRD FUNCTION
TO FOURTH FUNCTION
P
S
H
R
T
S1
X
C
T
P
S5
TO FRONT
DIFFERENTIAL
LOCK
M
FROM CONTROLLER
TO REAR BRAKES
TO FRONT BRAKES
DD
GG
sos
AA
P
T
C1
C2
FRONT
REAR/DETENT
RACK
BACK
HOLD
DUMP
RAISE
HOLD
LOWER
FLOAT
OPEN/
RAISE
HOLD
CLOSE/
LOWER
a1
b1
a2 b2
a3
b3
a4 b4
A1 B1 A2 B2
A3
B3
A4
B4
RACKBACK
LOWER /
FLOAT
DUMP
WIRED TO CONTROLLER
RAISE
FORWARDBACK
OPEN/
RAISE
HOLD
CLOSE/
LOWER
IMPLEMENT
RETURN
T
LS
P
DUAL MODE STEERING
INTEGRATED 3RD FUNCTION CONTROL
BB
CC
EE
FF
HH
PUMP GP
SUPPLEMENTAL
STEERING
293-2470
VALVE GP
RELIEF
251-0907
VALVE GP
CHECK
9T-1013
HAND METERING UNIT
296-6719
CYLINDER GP
STEERING
237-9271
VALVE AS
FOOT BRAKE
144-8521
ACCUMULATOR GP
BRAKE
362-9032
SENSOR GP
TRANSMISSION
NEUTRALIZER
290-5825
COOLER
HYDR. OIL
293-2240
COOLER AS
DUAL DISC AXLE OIL
205-3652
VALVE GP
CHECK
CLR BYPASS
145-8983
WITH AXLE OIL
263-8476
PUMP GP
ALXE OIL
COOLER
288-4166
FILTER GP
BYPASS
209-3149
SWITCH AS
AXLE CLR PRESS.
3E-7690
SCREEN AS
299-5499
MOTOR GP
OPTIONAL
REVERSING FAN
289-6394
MOTOR GP
RAD. HYDR. FAN
289-6393
PUMP GP
BRAKE AND FAN
288-4162
SENSOR GP
PRESSURE
BRAKE ACCUMULATOR
224-4536
CYLINDER GP
COUPLER
STANDARD: 190-3085
WIDE: 188-0982
VALVE GP
COUPLER CONTROL
363-7916
HAND METERING UNIT
DUAL MODE
282-6945
VALVE GP
DUAL MODE CONTROL
247-4503
VALVE GP
5TH AND 6TH FUNCTION
242-0117
VALVE GP
DIFFERENTIAL LOCK
CONTROL
233-7133
VALVE GP
RIDE CONTROL
280-9978
ACCUMULATOR GP
RIDE CONTROL
283-4418
ACCUMULATOR GP
RIDE CONTROL
298-2412
VALVE GP
BALL
191-9783
VALVE GP
COMBINATION
RELIF / DIVERTER
173-4032
CYLINDER GP
TILT
235-6824
CYLINDER GP
LIFT
235-6823
ACCUMULATOR GP
PILOT
243-4398
VALVE GP
CHECK
BACK PRESS.
294-0932
VALVE GP
CHECK
STEERING
BACK PRESS.
192-2684
VALVE GP
SHUTOFF
DRAIN
6V-7238
MANIFOLD
242-0265
CONNECTOR
ORIFICE
112-2628
VALVE GP
RESOLVER
SHUTTLE
8J-6875
VALVE GP
STEERING
PRIORITY
307-3181
PUMP GP
STEERING
237-0292
SWITCH AS
SECONDARY STEERING
230-5771
SCREEN
255-07599
STRAINER
262-5689
TANK GP
HYDRAULIC OIL
262-5654
SWITCH AS
RIDE CONTROL
DISABLE
126-6916
VALVE GP
3RD FUNCTION
CONTINUOUS FLOW
243-0651
VALVE GP
IMPLEMENT
2 SECTION
317-6905
VALVE GP
IMPLEMENT
3 SECTION
317-6907
VALVE GP
IMPLEMENT
4 SECTION
317-6909
VALVE GP
PILOT, JOYSTICK
212-1302
VALVE GP
PILOT, JOYSTICK
AND AUXILIARY
212-1305
VALVE GP
PILOT, JOYSTICK
AND 2 AUXILIARY
212-1307
VALVE GP
2 JOYSTICK
EH FUNCTION
247-0841
VALVE GP
IINTEGRATE
3RD FUNCTION
262-9706
VALVE GP
CHECK
263-8476
FUSION COUPLER
353-9364
TO LOCATION
C-10
TO LOCATION
E-9
TO LOCATION
H-8
TO LOCATION
D-10
