FLUID POWER SYMBOLS Item
924G
Steering Cylinder
2
Steering Cylinder
3
Steering Metering Pump
BASIC COMPONENT SYMBOLS MAIN AUX.
PUMP or MOTOR
4
Coupler Cylinder (924G Machine Only)
5
Coupler Control Valve (924G Machine Only)
6
Ride Control Accumulator
34
31
33
19
18
PUMP: VARIABLE and PRESSURE COMPENSATED
2-SECTION PUMP
LINE RESTRICTION (VARIABLE and PRESSURE COMPENSATED)
HYDRAULIC PNEUMATIC ENERGY TRIANGLES
VALVES
20
VALVE ENVELOPES
21
VALVE PORTS
22 13
8
Combination Relief Valve and Diverter Valve (924G Machine Only)
9
Tilt Cylinder (924G Machine Only)
9A
Tilt Cylinder (924Gz Machine Only)
10
Manifold
11
Tilt Conrol Valve (924G Machine Only)
11A
Tilt Conrol Valve (924Gz Machine Only) Lift Control Valve
13
Lift Cylinder
14
Auxiliary Control Valve For The Third Function
15
Connector Block (924Gz Machine Only)
16
Auxiliary Control Valve For The Fourth Function
17
Cover
18
Pilot Valve
19
Connector
21
Pilot Shutoff Valve
P T SHIFTED POSITION
P T NORMAL POSITION
INFINITE POSITION
MEASUREMENT
PRESSURE
ROTATING SHAFTS
FLOW
TEMPERATURE
UNIDIRECTIONAL
BIDIRECTIONAL
FLUID STORAGE RESERVOIRS 16
14
12
11
10
37
2
8
23
35
924G and 924Gz Wheel Loader Hydraulic System
28
924G: 9SW1-UP 3PZ1-UP AAN1-UP
924Gz: 6YW1-UP 3DZ1-UP AAB1-UP
VENTED
RETURN ABOVE FLUID LEVEL
PRESSURIZED
RETURN BELOW FLUID LEVEL
COMBINATION CONTROLS
SOLENOID or MANUAL
SOLENOID
SERVO
SOLENOID and PILOT or MANUAL
SOLENOID and PILOT
DETENT
THERMAL
MANUAL CONTROL SYMBOLS
PUSH-PULL LEVER
PEDAL
PUSH BUTTON
GENERAL MANUAL
SPRING
PILOT CONTROL SYMBOLS RELEASED PRESSURE
REMOTE SUPPLY PRESSURE
30 EXTERNAL RETURN
INTERNAL RETURN
SIMPLIFIED
22
Accumulator For The Pilot Valves
23
Pressure Reducing Valve
24
Back Pressure Valve
25
Manifold
26
Piston Pump For The Steering And Pilot System
27
Piston Pump For The Work Tools
UNIDIRECTIONAL
UNIDIRECTIONAL
28
Oil Filter
BIDIRECTIONAL
BIDIRECTIONAL
29
Oil Cooler
30
Fan Motor
31
Hydraulic Tank
32
Gear Pump
ACCUMULATORS
SPRING LOADED
GAS CHARGED
HYDRAULIC PUMPS
4
1
3
5
6
25
7
26
27
FIXED DISPLACEMENT
24
VARIABLE DISPLACEMENT NON-COMPENSATED
© 2003 Caterpillar All Rights Reserved
33
Accumulator For The Rear Brakes
34
Accumulator For The Front Brakes
35
Brake Control Valve (Service)
36
Relief Valve
37
Check Valves
38
Supplemental Steering Pump
Item
SPRING LOADED
BASIC SYMBOL
A B
Test Port For Steering Piston Pump Signal Pressure
C
Test Port For Work Tool Piston Pump Pressure
D
Test Port For The Steering System
E
Test Port For Pilot Pressure
F
Line To The Secondary Steering Pressure Switch
G
Line To The Rear Service Brakes
H
Line To The Front Service Brakes
J
From the Controller
K
Test Port For The Float Selector Valve
L
Tilt Back Position
M
Dump Position
N
Raise Position
P
Lower/Float Position
Q
Auxiliary Position For The Third Function
R
Auxiliary Position For The Third Function
S
Auxiliary Position For The Fourth Function
T
Auxiliary Position For The Fourth Function
U
Wired To The Controller
V
Lines To The Third Function
W
Lines To The Fourth Function
X
Lines From Coupler Control Valve To Manifold (924G Machine Only)
Y
Pilot Lines To Tilt Control Valve (924Gz Machine)
Z
Line From Metering Pump To Steering Piston Pump (924Gz Machine Only)
LINES CROSSING
LINES JOINING
HYDRAULIC MOTORS FIXED DISPLACEMENT
VARIABLE DISPLACEMENT NON-COMPENSATED
HYDRAULIC AND PNEUMATIC CYLINDERS
SINGLE ACTING
DOUBLE ACTING
INTERNAL PASSAGEWAYS INFINITE POSITIONING
FLOW IN ONE DIRECTION
TWO POSITION
THREE POSITION
PARALLEL FLOW
CROSS FLOW
FLOW ALLOWED IN EITHER DIRECTION
Printed in U.S.A.
924Gz
Description Test Port For Work Tool Piston Pump Signal Pressure
CROSSING AND JOINING LINES
INTERNAL SUPPLY PRESSURE
COMPLETE
34
31
33
13
9A
22 32 36
38
17
16
14
12
11A
10
37
2
23
35
28
29
30
3
1
6
7
25
26
27
24
16 Page, B/W, D.G.M.
Screen Assembly
CHECK VALVES
AB
AB
29
20
FOUR-WAY
THREE-WAY
CONTROL VALVES
15
38
17
12
TWO-WAY
THREE POSITION
9
Ride Control Solenoid Valve 36
TWO POSITION
ONE POSITION
32
7
LINE RESTRICTION (FIXED)
RESTRICTION
PRESSURE COMPENSATION
LINE RESTRICTION (VARIABLE)
SPRING (ADJUSTABLE)
VARIABLILTY
CONTROL VALVES
SPRING
FLUID CONDITIONER
RENR3512-02
1
Description
RENR3512-02 July 2003