793 f air system

8/2/2019 793 F Air System

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INTERACTIVE SCHEMATIC

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Cover Page

Information

Schematic

Machine Views

Component Table

Tap Table

Fluid Power Symbols

Electrical Symbols

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Rear Frame

Tap Views

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Bookmarks X

EC-C3

EC-C2 E-C60

EC-C1

E-C61

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Air Syst em793F Off -Highw ay Tr uc k

SSP1-UP

2009 Caterpillar, All Rights Reserved Printed in U.S.

KENR956September 200


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2009 Caterpillar, All Rights Reserved

COMPONENT TABLE

DescriptionPart

NumberMachineLocation

SchematiLocation

Air Compressor Gp 261-4881 1 F-7

Block - Manifold (Air System Pressure) 160-0980 2 D-4Dryer Gp - Air 194-1986 3 F-3

Governor As 4N-9680 4 E-5

Horn Gp - Air 5D-6998 5 B-3

Pump Gp - Lubrication 178-6919 6 B-2

Regulator 8D-4755 7 B-2

Reservoir - Air (NA) 296-9870 8 D-3

Sensor Gp - Pressure, Air System 141-5746 9 C-4

Starting Motor Gp - Air, TDI Turbine

IR Turbine

294-5599

294-561310 C-6

Valve - Air Relief (Air Tank) 6B-9664 11 D-3

Valve - Drain 7X-7655 12 D-2

Valve As - Check 204-2658 13 D-2

Valve Gp - Relay, Air Starting Motor 4N-3411 14 D-3

Valve Gp - Solenoid, Air Horn 185-0008 15 B-3

Valve Gp - Solenoid, Air Starting 221-9576 16 C-5

Valve Gp - Solenoid, Autolube Actuation 221-9576 17 C-3


4/92009 Caterpillar, All Rights Reserved

FLUID POWER SYMBOLS

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 RESTRICTIONVARIABLE and PRESSURE

COMPENSATED

PRESSURE

COMPENSATION

PUMP: VARIABLE andPRESSURE 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

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

HYDRAULIC PUMPS

FLUID STORAGE RESERVOIRS

CROSSING AND JOINING LINES

VALVE ENVELOPES VALVE PORTS

BASIC COMPONENT SYMBOLS

FLUID CONDITIONERPUMP or MOTOR

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

VALVES

PILOT CONTROL SYMBOLSRELEASED PRESSURE

EXTERNAL RETURN INTERNAL RETURN

REMOTE SUPPLY PRESSURE

SIMPLIFIED COMPLETE INTERNALSUPPLY PRESSU

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOIDor MANUAL

SOLENOIDand PILOT

SOLENOID andPILOT or MANUAL

COMBINATION CONTROLS

SOLENOID SERVO THERMAL DETENT

HYDRAULIC AND PNEUMATIC CYLINDERS

DOUBLE ACTINGSINGLE ACTING

BASICSYMBOL

SPRINGLOADED

CHECK VALVES

TWOPOSITION

INFINITEPOSITIONING

FLOW IN ONEDIRECTION

FLOW ALLEITHER DI

THREEPOSITION

CROSSFLOW

PARALLELFLOW

INTERNAL PASSAGEWAYS

NORMAL POSITION

A B

P T

A B

P T

SHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

MANUAL SHUTOFF

SHUTTLE PILOTCONTROLLE


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ELECTRICAL SYMBOLS

Hydraulic Symbols (Electrical)

325-AG135 PK-14

Circuit IdentificationNumber

Wire Color Wire Gauge

Harness identification codeThis example indicateswire 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 ColorCircuit Number

Identification

B A

Wire

Wire

(EXAMPLE VALVE)

Current Standard

Transducer(Fluid)

Transducer(Gas / Air)

G

Generator

Electrical WirePressure Switch

MElectric Motor

Pressure Switch(Adjustable)

Temperature Switch

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

Electrical Symbols (Electrical)

T


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COMPRESSED AIR CIRCUIT COLOR DESCR

AIR COMPRESSOR OUTPUT AND CIRCU

LINE PATTERNS

Drain / Return Lines

Component Group

Pilot / Load Sensing

Pressure Line

CALLOUTS

Taps (Pressure,Sampling,SenYY

(52) VALVE GP - CONTROL138-1234

Callout Number(Machine Location from

ComponentLocationsTable)PartNumber

AIR SUPPLY

AIR EXHAUST

THIS SCHEMATIC IS FOR THE 793F OFF-HIGHWAY TRUCK

AIR SYSTEM

MEDIA NUMBER: KENR9561

PART NUMBER: 278-8453, CHANGE: 00, VERSION: -

Components are shown installed on a fully operable machine.

Refer to the appropriate Service Manual for Troubleshooting, Specifications.

1234567

1234567

EXTERNAL

AIR SUPPLY

AUTO

LUBE

R

E

S

E

R

V

O

I

R

(1) AIR COMPRESSOR GP261-4881

(4) GOVERNOR AS4N-9680

(3) DRYER GP

AIR194-1986

(10) STARTING MOTOR GP

AIRTDI TURBINE : 294-5599IR TURBINE : 294-5613

(14) VALVE GPRELAY,

STARTING MOTOR4N-3411

(16) VALVE GPSOLENOID,

AIR STARTTING221-9576 (9) SENSOR GP

PRESSURE

AIR SYSTEM141-5746


AIR HORN185-0008

(5) HORN GP

AIR5D-6998

(2) BLOCK

MANIFOLD,AIR SYSTEM PRESSURE

160-0980

(8) RESERVOIRAIR (NA)296-9870

(11) VALVEAIR RELIEF

(AIR TANK)6B-9664

(13) VALVE ASCHECK

204-2658

(12) VALVEDRAIN7X-7655

(6) PUMP GPLUBRICATION

178-6919

(7) REGULATOR

8D-4755


AUTOLUBE ACTUATION221-9576


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LEFT SIDE - FRONT FORWARD OF THE TIRES

AUTO LUBE (FRONT OF TRUCK)

17

15

7

6

5

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RIGHT SIDE - BEHIND FRONT TIRE(RIGHT SIDE OF ENGINE COMPARTMENT)

12

10

8

4

3

1

VIEW ALL CALLO


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BACK OF AIR RESERVOIR

16

14

13

11

9

2

VIEW ALL CALLO

793 f air system

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