KENR2638 FLUID POWER SYMBOLS

May 1994 BASIC COMPONENT SYMBOLS

MAIN AUX.
PUMP: VARIABLE and
PUMP or MOTOR FLUID CONDITIONER SPRING CONTROL VALVES RESTRICTION LINE RESTRICTION 2-SECTION PUMP PRESSURE COMPENSATED
(FIXED)

VARIABILITY SPRING LINE RESTRICTION PRESSURE HYDRAULIC PNEUMATIC LINE RESTRICTION ATTACHMENT
(ADJUSTABLE) (VARIABLE) COMPENSATION ENERGY TRIANGLES VARIABLE and PRESSURE
COMPENSATED

VALVES
VALVE ENVELOPES VALVE PORTS

ONE POSITION TWO POSITION THREE POSITION TWO-WAY THREE-WAY FOUR-WAY

CONTROL VALVES CHECK VALVES

AB AB

P T P T
BASIC SPRING SHUTTLE PILOT
NORMAL POSITION SHIFTED POSITION INFINITE POSITION
SYMBOL LOADED CONTROLLED

MEASUREMENT ROTATING SHAFTS

PRESSURE TEMPERATURE FLOW UNIDIRECTIONAL BIDIRECTIONAL

FLUID STORAGE RESERVOIRS

CB-214C And CB-224C

Vibratory Compactors
VENTED PRESSURIZED RETURN ABOVE FLUID LEVEL RETURN BELOW FLUID LEVEL

COMBINATION CONTROLS

Hydraulic System
SOLENOID SOLENOID SOLENOID SOLENOID and SERVO THERMAL DETENT
or MANUAL and PILOT PILOT or MANUAL
CB-214C: CB-224C:
MANUAL CONTROL SYMBOLS
9XK1-UP 3AL1-UP

PUSH-PULL LEVER MANUAL SHUTOFF GENERAL MANUAL PUSH BUTTON PEDAL SPRING

PILOT CONTROL SYMBOLS

RELEASED PRESSURE REMOTE SUPPLY PRESSURE

EXTERNAL RETURN INTERNAL RETURN SIMPLIFIED COMPLETE INTERNAL

SUPPLY PRESSURE

ACCUMULATORS CROSSING AND JOINING LINES HYDRAULIC AND PNEUMATIC CYLINDERS

SPRING LOADED GAS CHARGED LINES CROSSING LINES JOINING SINGLE ACTING DOUBLE ACTING

HYDRAULIC PUMPS HYDRAULIC MOTORS INTERNAL PASSAGEWAYS

FIXED VARIABLE DISPLACEMENT FIXED VARIABLE DISPLACEMENT THREE TWO

INFINITE
DISPLACEMENT NON-COMPENSATED DISPLACEMENT NON-COMPENSATED POSITIONING POSITION POSITION

UNIDIRECTIONAL UNIDIRECTIONAL

FLOW IN ONE PARALLEL CROSS FLOW ALLOWED IN

BIDIRECTIONAL BIDIRECTIONAL DIRECTION FLOW FLOW EITHER DIRECTION

© 1994 Caterpillar Printed in U.S.A.

All Rights Reserved

Electrical Symbols Table

Hydraulic Symbols (Electrical)

G M
Transducer Transducer Generator Electric Motor
(Fluid) (Gas / Air)

(Dimensions: 34 inches x 24 inches)

KENR2638-00
Pressure Switch Pressure Switch Temperature Switch Electrical Wire
(Adjustable)

Electrical Symbols (Electrical)

T
Pressure Temperature Level Flow
Symbol Symbol Symbol Symbol

Wire Number Identification Codes

Electrical Schematic Example Hydraulic Schematic Example

Current Standard Current Standard

Harness identification code
This example indicates
wire 135 in harness "AG". Wire

16 Page,
Circuit Number Wire Color
Identification

325-AG135 PK-14
325-PK
Circuit Identification Wire Color Wire Gauge
Number

Previous Standard
Wire Color
Wire

325-PK-14
B A
Circuit Number Wire Gauge
Identification (EXAMPLE VALVE)
 2 6 4 13

M4 M1

1 2 120 BAR

T L R

M3 M2

3
80 BAR

90 BAR

4 5

12 9 5 10 11 8 7 1 3
9 6 5 4

P PT

P 200 BAR T

ENGINE SPEED
2450 RPM FULL LOAD
2510 RPM HIGH IDLE
8

6 BR INT1
7
8CC 16.8CC

STRAINER
100 MESH S G

BP 9 2 10 8 7 1 3
INT2 12 11 13
15 BAR
9
R D01542

3.5
BAR
16 Page,(Dimiensions: 34 inches x 24 inches)
KENR2638-00

447 CC 558 CC

Standard Components
Item No. Component
10 12 13 1 Steer Cylinder
X1 X2 X3 X4 PS G MB
2 Front Vibratory Motor
3 Rear Vibratory Motor
B
4 Steering Control Unit
11
5 Vibratory Valve
6 Steer / Vibratory Pump
7 Brake and Interlock Valve
ENGINE SPEED 250 BAR 25 BAR 8 Oil Cooler
2450 RPM FULL LOAD 9 Hydraulic Tank
2510 RPM HIGH IDLE
35 CC
10 Charge Filter
A
11 Propel Pump
12 Front Propel Motor
13 Rear Propel Motor

R T2 T1 MA

Hydraulic Schematic
104-2908
D01521