INTERACTIVE SCHEMATIC

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©2011 Caterpillar, All Rights Reserved Printed in U.S.A.

UENR1263-01May 2011

797F Off-Highway TruckAir SystemLAJ1-UPWSP1-UP

COMPONENT LOCATION

Description PartNumber

MachineLocation

SchematicLocation

Compressor Gp 261-4881 1 F7Dryer As - Air 194-1986 2 E5, F5Reservoir - Air 290-9541 3 C4Valve As. - Air Switch Module 217-4184 4 E4Valve-Pressure (Protection) 222-0570 5 D4Sensor Gp - Press. 141-5746 6 A5Valve - Drain 7X-7655 7 C3Governor As. 217-4168 8 E7Valve Gp. - Solenoid (Air Horn) 185-0008 9 A5Horn Gp. - Air 9D-4049 10 A5Pump Gp. - Lubrication 308-0161 11 A3Valve As. - Check 4D-0487 12 C4Reservoir - Air 291-6320 13 B3Regulator 8D-4765 14 A3Motor Gp. - Air Start TDI 278-0533Motor Gp. - Air Start IR 316-4259Valve - Air Starter (Relay) 115-9190 16 C6Valve As. - Solenoid (Autolube) 221-9576 17 A4, D6Valve - Air Relief 6B-9664 18 C3

C715

Manifold 19 B55C-9762

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

PRESSURECOMPENSATION

PUMP: VARIABLE andPRESSURE COMPENSATED

ENERGY TRIANGLESHYDRAULIC 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 PRESSURE

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOIDor MANUAL

SOLENOIDand PILOT

SOLENOID and PILOT 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 ALLOWED INEITHER DIRECTION

THREEPOSITION

CROSSFLOW

PARALLELFLOW

INTERNAL PASSAGEWAYS

NORMAL POSITION

A B

P T

A B

P TSHIFTED POSITION INFINITE POSITION

CONTROL VALVES

ATTACHMENT

MANUAL SHUTOFF

SHUTTLE PILOTCONTROLLED

ELECTRICAL SYMBOLSHydraulic 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

AIR CIRCUIT COLOR DESCRIPTIONSCOMPRESSOR CIRCUITAIR STARTRESERVOIR CIRCUIT

THIS SCHEMATIC IS FOR THE 797F OFF HIGHWAY TRUCK AIR SYSTEM MEDIA NUMBER: UENR1263-01PART NUMBER: 272-3219, CHANGE: 02,Components are shown installed on a fully operable machine.

Refer to the appropriate Service Manual for Troubleshooting, Specifications.

(7) VALVE GPDRAIN

7X-7655

(5) VALVE GPPRESS PROTECTION

222-0570

(4) VALVE AS217-4184

EXTERNALAIR SUPPLY

AUTOLUBE

AIRHORN

(2) DRYER ASAIR

194-1986

(1) COMPRESSOR GP261-4881

(8) GOVERNOR AS217-4168

(17) VALVE ASSOL221-9576

(15) MOTOR GPAIR START

(TDI) 278-0533(IR) 316-4259

(16) VALVEAIR START115-9190

(6) SENSOR GPPRESSURE

141-5746

(10) HORN GPAIR

9D-4049

(9) VALVE GPSOLENOID

185-0008

(3) RESERVOIRAIR

290-9541

(13) RESERVOIRAIR

291-6320

(18) VALVE GPAIR RLF6B-9664

(14) REGULATOR8D-4765

(17) VALVE ASSOLENOID

221-9576

(11) PUMP GPLUBRICATION

308-0161

(12) VALVE ASCHECK4D-0487

(19) MANIFOLD5C-9762

A

B

C

D

E

F

1234567

A

B

C

D

E

F

1234567

(2) DRYER ASAIR194-1986

MACHINE COMPONENT LOCATIONS

A - A

B - B

LEFT SIDEFRONT

ENGINE

A - A

B - B

FRONT

B - B

B - B

FRONT

FACING ENGINE

19 18

17

16

15

14

13

1211

10

9

8

7

6

5

4

3

2

1