caterpillar heui-controles-de-motor-3408 e-3412

CONTROLES DE MOTOR 3408E/3412

HYDRAULIC ELECTRONIC UNIT INJECTION(HEUI)

©1997 Caterpillar Inc.

- 1 -

VALVULA DECONTROLDE BOMBA

FILTRO DE ACEITE

ENFRIADOR DE ACEITE

HEUI

HEUI

SUMIDERODE ACEITE

SENSOR DEPRESIONDE ACEITE

SENSOR DETEMPERATURA

DE ACEITERESERVORIO

DE ACEITEARRAQUE EN FRIO SENSOR DE

PRESION DE ACEITE

ECM

GRUPO DEBOMBA DE

SUMINISTRODE ACEITE

CIRCUITOCOOL DOWN

TANQUE DE COMBUSTIBLE

SENSOR TEMPERATURA

DE COMBUST.

VALVULAREGULADORA DE

PRESION

FILTROSECUNDARIODE COMBUST.

BOMBA DETRANSFERENCIA

DE COMBUST.

FILTRO PRIMARIOY SEPARADOR

DE AGUADE PETROLEO

BOMBA DE LUBRICACION

AL SISTEMA DE LUBRICACION

SISTEMA DE COMBUSTIBLE HEUI 3408E/3412E

FLUID MANIFOLDHYDRAULIC PASSAGE


- 3 -

- 10 -

- 11 -

- 12 -

- 13 -

- 14 -

- 15 -

- 16 -

- 17 -

ADEM IIMODULO DE

CONTROLELECTRONICO

(ECM)PERNO DE

TIERRA

15 AMPBREAKER

RELEPRINCIPAL

KEYSWITCH

SENSOR DE PRESION A LA SALIDA DEL TURBO

SENSOR SECUNDARIODE SPEED/TIMING

SENSOR PRIMARIODE SPEED/TIMING

SENSOR DEPRESION DE ACEITE

24 V

CONECTOR DE INTERFACE

A LA MAQUINA

HARNESS DEMOTOR

VALVULA DE CONTROL DE LA BOMBA

SENSOR DE TEMP DE REFRIGERANTE

SENSOR DE PRESION ATMOSF.

SENSOR DE PRESION DE ACEITE

SENSOR DE TEMPERATURA DE ACEITE

SENSOR DE TEMP.DE COMBUSTIBLE

SWITCH DE FLUJO DE REFRIGERANTE

8 O 12INYECTORES

ACCESO ALSENSOR DE SERVICIO TDC

PANELDEINSTRUMENTOS

CONTROL DE AUTO RETARDADOR

CONTROL DE TRANSMISION EPTC II

HERRAMIENTA DE SERV. ELECTRONICO

CAT DATA LINK

VENTILADOR

FAN SPEED SENSOR

VALVVULA DE CONTROL DE VENTILADOR

SENSOR DE PRESION INGRESO AL TURBO

SWITCHESS DE ACELERADOR DE RESPALDO, DE HABILITACION DE BAJA EN VACIO ELEVADO,Y SWITCH DE APAGADO A NIVEL DE PISO

SENSOR DEACELERADOR PEDAL DE

ACELERADOR

SWITCH DE DESCONEXION

SISTEMA3408E/3412E HEUIDIAGRAMA DE COMPONENTES

HARNESS DEMAQUINA

M a t e r i a l d e E s t u d i a n t e

SISTEMA DE CONTROL ELECTRONICO

- 19 -

- 20 -

- 21 -

- 22 -

• PRUEBA DE SOLENOIDES DE INYECTOR

• CORTE DE CILINDROS

• PRUEBA AUTOMATICA DE INYECTORES

METODOS PARA PROBAR INYECTORESHEUI

- 23 -

LOGICA DE CONTROL HEUI

VELOCIDAD DE MOTOR

CANTIDAD DE COMB. COMB. RPM

MODO FRIO

SELECC.SINCRONIZ.

CONVIERTE ASINCRONIZ.

DESEADA

TEMPERATURAACEITE

CONTROL DE SINCRONIZACION

GRADOS BTDC SINCRONIZ.DESEADA

BTDC

SINCRONIZ.

FORMA DE ONDA DE LASINCRONIZ. DE LA INYECCION

- 24 -

GOBERNADORELECTRONICO

MAPASTORQUE

MAPASFRC

SENSORES DE PRESIONATMOSFERICA Y DESALIDA DEL TURBO

LOGICA DECONTROLDE MOTOR

ACELERADOR

SHUTDOWNS

CONTROL DEACTUACIONDE INYECCION

RPM DE MOTOR

TDC

87654321

CONTROLINYECCIONCOMBUST.

A LA VALVULA DECONTROL DE BOMBA

SEÑALES A LOS INYECTORESDE COMBUSTIBLE

SEÑAL DE SPEED/TIMING

RPM DE MOTOR

SENSORES DESPEED/TIMING

RUEDA DESINCRONIZACION

RPM DE MOTOR

ECM

GOBERNADOR ELECTRONICO 3408E/3412E

SENSORES DEPRESION Y DE TEMP.

DE ACEITE

M a t e r i a l d e l E s t u d i a n t e

ADEM IIMODULO DE

CONTROLELECTRONICO

(ECM)PERNO DE

TIERRA

15 AMPBREAKER

RELEPRINCIPAL

KEYSWITCH

SENSOR DE PRESION A LA SALIDA DEL TURBO

SENSOR SECUNDARIODE SPEED/TIMING

SENSOR PRIMARIODE SPEED/TIMING


24 V

CONECTOR DE INTERFACE

A LA MAQUINA

HARNESS DEMOTOR

VALVULA DE CONTROL DE LA BOMBA

SENSOR DE TEMP DE REFRIGERANTE

SENSOR DE PRESION ATMOSF.

SENSOR DE PRESION DE ACEITE


SENSOR DE TEMP.DE COMBUSTIBLE

SWITCH DE FLUJO DE REFRIGERANTE

8 O 12INYECTORES

TDC SERVICEPROBE ACCESS

PANELDEINSTRUMENTOS

CONTROL DE AUTO RETARDADOR

CONTROL DE TRANSMISION EPTC II

HERRAMIENTA DE SERV. ELECTRONICO

CAT DATA LINK

VENTILADOR

FAN SPEED SENSOR

VALVVULA DE CONTROL DE VENTILADOR

SENSOR DE PRESION INGRESO AL TURBO

SWITCHESS DE ACELERADOR DE RESPALDO, DE HABILITACION DE BAJA EN VACIO ELEVADO,Y SWITCH DE APAGADO A NIVEL DE PISO

SENSOR DEACELERADOR PEDAL DE

ACELERADOR

SWITCH DE DESCONEXION

SISTEMA3408E/3412E HEUIDIAGRAMA DE COMPONENTES

HARNESS DEMAQUINA

M a t e r i a l d e l E s t u d i a n t e

393229381812

732-PK996-GN998-BR999-WHF723-PKF724-PU

VELOCIDAD SECUNDARIA DE MOTOR+V SINCRONIZACIONRETORNO DIGITALVELOCIDAD PRIMARIA DE MOTORCAL DE TIMING +CAL DE TIMING -

ECM(3408E/3412 E)

P2 J2

ABC

ORBKWH

SENSORSPEED/TIMINGSECUNDARIO

ABC

ORBKWH

SENSORSPEED/TIMING

PRIMARIO

CONECTOR DECALIBRACION DE SINCRONIZACION

12

SENSORES DE SPEED/TIMING

P44 J44

P20 J20

P26 P1 J1

- 27 -

- 28 -

4

3

6

5

7

2

1

8

REF

REF

REF

REF

REF

REF

REF

REF

TDC

TDC

TDC

TDC

TDC

TDC

TDC

DIENTE50/50

ROTACION DE LARUEDA DE SINCRONIZACION

TDC CILINDRO No. 1

RANGO DECALIBRACION DE SINCRONIZACIONRANGO ± 10°

SENSORSPEED/TIMING

PRIMARIO

SENSORSPEED/TIMINGSECUNDARIO

RUEDA DE SINCRONIZACION

- 29 -

A B C D E F G

ROTACION DE LA RUEDA DE SINCRONIZACION

H

80/20 % 80/20 % 80/20 %80/20 % 50/50%80/20 % 80/20 %

TABLA DE DIENTES DE ENGRANAJE DE SINCRONIZACION

ENTRADAA TABLA

CILINDRODE REFERENCIA

ABCDEFGH

80 %80 %80 %80 %80 %80 %80 %50 %

ARRANQUE

NINGUNO IDENTIFICADO

PORCENTAJEPWM

- 30 -


CIL NO. 3BORDE DE

REFERENCIA

CIL NO. 4TDC

CIL NO. 4BORDE DE

REFERENCIA

CIL NO. 8BORDE DEREFERENCIA

CIL NO. 3TDC



80 %80 %80 %80 %80 %80 %80 %50 %

DESPUES DE RECONOCER EL PATRON

NOCIL NO. 3NONOCIL NO. 4NONOCIL NO. 8

ENTRADAA TABLA

ABCDEFGH

PORCENTAJEPWM

A B C D E F G H

- 31 -


PORCENTAJEPWM


80 %80 %80 %80 %80 %80 %80 %50 %

OPERACION NORMALNOCIL NO. 3NONOCIL NO. 4NONOCIL NO. 8

CIL NO. 4(REFERENCIA)

CIL NO. 4ACTUAL TDC

(CALIBRATO)

62° BTDC (EEPROM)

SINC. DESEADA

NO. 4INYECCION

ENTRADAA TABLA


ABCDEFGH

A B C D E F G H

CIL NO. 3(REFERENCIA)

CIL NO. 3ACTUAL TDC

(CALIBRADO)

62° BTDC (EEPROM)

SINC. DESEADA

DEMORA NO 3INYECCION

DEMORA

TDCASUMIDO

TDCASUMIDO

- 32 -

393229381812

732-PK996-GN998-BR999-WHF723-PKF724-PU

SECONDARY ENGINE SPEED+V TIMINGDIGITAL RETURNPRIMARY ENGINE SPEEDTIMING CAL +TIMING CAL -

ECM(3408E/3412E)

P2 J2

ABC

ORBKWH

SECONDARYSPEED/TIMING

SENSOR

ABC

ORBKWH

PRIMARYSPEED/TIMING

SENSOR

TIMING CALIBRATIONCONNECTOR

P26

SENSOR DE CALIBRACIONDE SINCRONIZACION

SENSOR DE CALIBRACION DE SINCRONIZACION

P44 J44

P20 J20

P1 J1

12

- 33 -

DISTANCIA DE BORDE DE REFERENCIA AL TDC

BORDE DEREFERENCIA CIL. NO. 1 TDC

ASUMIDOCIL. NO. 1 TDCACTUAL

TIMINGREFERENCE

OFFSET

MAXIMUM TIMING REFERENCE OFFSET ± 10 DEGREES

SEÑAL DEL SENSORDE CALIBRACION DE SINCRONIZACION

RUEDA DESINCRONIZACION

CALIBRACION DE SINCRONIZACION

+10°

± 10°

-10°

- 34 -

FORMA DE ONDA DE LA CORRIENTE DE INYECCION

0 1 2 3 4

CU

RR

EN

T

FL

OW

TIEMPO (MILISEGUNDOS)

CORRIENTE PICO DE ACCIONAMIENTO

CORRIENTE PICO DE SOSTENIMIENTO

UN CICLO

5

- 35 -

MOVIMIENTO DE LA VALVULA POPPET

0 1 2 3 4

CU

RR

EN

T F

LO

W


CORRIENTE

POPPETLIFT

5

- 36 -

FORMA DE ONDA Y CARACTERISTICAS DE RESPUESTA

0 1 2 3 4

CU

RR

EN

T

FL

OW


CORRIENTE

POPPETLIFT

RAPIDEZ DEINYECCION

INICIO DE LAINYECCION

DURACION

5

FIN DEINYECCION

- 37 -

LIMITES DEL SISTEMA DE COMBUSTIBLE

• Potencia Maxima

• MaximoTorque

• Relacion aire/combustible

• Limite de modo en frio

• Combustible en el arranque

- 38 -

MODOS EN FRIO DEL SISTEMA DE COMBUSTIBLE

• Control de velocidad

• Limitacion de combustible

• Sincronizacion de la inyeccion

• Presion de actuacion de inyeccion

• Inyeccion de eter

- 39 -

DERATEOS DEL SISTEMA DE COMBUSTIBLE

• Compensacion automatica por altura

• Compensacion automatica por filtro

• Advertencia de derateo de motor

- 40 -

SISTEMA DE INYECCION DE COMBUSTIBLE

- 41 -


FILTRO DE ACEITE

ENFRIADOR DE ACEITE

HEUI

HEUI

SUMIDERODE ACEITE

SENSOR DEPRESION

DE ACEITE


DE ACEITERESERVORIO

DE ACEITEARRANQUE EN FRIO SENSOR DE

PRESION DE ACEITE

ECM

GRUPO DEBOMBA DE

SUMINISTRODE ACEITE

CIRCUITOCOOL DOWN


SENSOR TEMPERATURA

DE COMBUST.


PRESION



DE COMBUST.


DE AGUADE PETROLEO






- 4 2 -

- 43 -

- 44 -



DE COMBUST.


FILTRO DEACEITE


ENFRIADOR DE ACEITE

HEUI

HEUI

OILSUMP

SENSOR DEPRESION

DE ACEITE


DE ACEITE


ECM

COOL DOWNCIRCUIT

SUMINISTRO DE BAJA PRESION DE ACEITE


SENSOR TEMPERATURA

DE COMBUST.


PRESION



DE AGUADE PETROLEO


RESERVORIODE ACEITE

ARRANQUE EN FRIO

GRUPO DEBOMBA DE

SUMINISTRODE ACEITE



- 45 -



DE COMBUST.


FILTRO DEACEITE


ENFRIADOR DE ACEITE

HEUI

HEUI

SUMIDERO DE ACEITE



DE ACEITE


GRUPO DEBOMBA DESUMINISTRODE ACEITE

COOL DOWNCIRCUIT

ACEITE A ALTA PRESION

SENSOR TEMPERATURA

DE COMBUST.

ECM



PRESION



DE AGUADE PETROLEO


RESERVORIODE ACEITE

ARRANQUE EN FRIOFLUID MANIFOLD

HYDRAULIC PASSAGE


- 46 -



DE COMBUST. VALVULAREGULADORA DE

PRESION


FILTRO DEACEITE

3408E/3412E HEUI FUEL SYSTEM

ENFRIADOR DE ACEITE


HEUI

HEUI

SUMIDERO DE ACEITE


HYDRAULICTEMPERATURE

SENSOR

OIL PRESSURESENSOR

ECM

COOL DOWNCIRCUIT

SUMINISTRO DE PETROLEO A BAJA PRESION

SENSOR TEMPERATURA

DE COMBUST.


FILTROSECUNDARIO(2 MICRON)


DE AGUADE PETROLEO

COLD STARTOIL

RESERVOIR

HYDRAULICSUPPLY

PUMPGROUP



- 47 -

SUMINISTRO DECOMBUSTIBLE A BAJA PRESION

MANGUITO DE INYECTOREN LA CULATA

MANIFOLD DE SUMINISTRO DE FLUIDO

INYECTOR

ADAPTADOR PARA INYECCION DE ACEITE

JUMPER

ABRAZADERA DEL INYECTOR

PASAJE DE ACEITEA ALTA PRESION

CULATA

ROCKER ARM BASE

PASAJE DE ACEITE DE LUBRICACION

BLOQUE DE CILINDROSREFRIGERANTE

ARANDELA DE METAL

FLUJO DE FLUIDO POR LOS INYECTORES ACEITE A ALTA PRESION

MANIFOLD DE SUMINISTRO DE FLUIDO

INYECTOR

CULATA

SELLO O´RING INFERIOR DEL INYECTOR

SELLO O´RINGSUPERIOR DEL INYECTOR

SUMINISTRO DE COMBUSTIBLE AL INYECTOR

CONTACTO METAL A METAL

SUMINISTRO DE COMBUSTIBLEA BAJA PRESION

CAMISETA DEL INYECTORLADO DE CULATA

SELLO O´RINGSUPERIOR DEL MANGUITO

SELLO O´RINGINFERIOR DE MANGUITO

- 49 -

- 50 -

PASAJE DE SUMINISTRODE COMBUSTIBLE A BAJA PRESION

MANGUITO DEINYECTOR, CULATA

PASAJE HIDRAULICODE ALTA PRESION

BASE DEBALANCIN

PASAJE DE ACEITE DE LUBRICACION

RANURAS DEEXTRACCION

SELLOS DE COMBUSTIBLE

MANIFOLD DE SUMINISTRO DE COMBUSTIBLE

- 51 -

- 52 -

FORMA DE ONDA DE LA CORRIENTE DE INYECCION

0 1 2 3 4

CU

RR

EN

T

FL

OW

TIEMPO (MILSEGUNDOS

CORRIENTE PICO INICIAL

CORRIENTE DE SOSTENIMIENTO

UN CICLO

5

- 53 -

CARACTERISTICAS DE LA ONDA Y RESPUESTA

0 1 2 3 4

CU

RR

EN

T

FL

OW

TIME (MILLISECONDS)

CORRIENTE

APERTURA DEVALVULA

INYECCIONRATE

INICIO DEINYECCION

DURACION

5

FIN DEINYECCION

- 54 -

- 55 -

UNIDAD INYECTORA HEUI

3 GRUPOS PRINCIPALES

GRUPO DE CUERPODE VALVULA

GRUPO DE BARRIL

GRUPO DE BOQUILLA

-

STOPPINPLUNGER SPRING SEAL BARREL BALL

DOWEL

SEAL

INTENSIFIER PISTON

RETAINER RING

WASHER

STOPPLATE

CHECKPLATE

BALL

STOP

DOWEL

SPRING

LIFTSPACER

SLEEVE

DOWEL

CHECK

TIP CASE

POPPET SPRING SLEEVE SHIM SEAL

ADAPTER BOLT

SPACER

ARMATURE

SCREW

SOLENOIDASSEMBLY

SCREW

BODYVALVE BODY GROUP

BARREL GROUP

NOZZLE GROUP

3408E/3412E HEUI INJECTORCOMPONENTS

- 57 -

LAINA

BARRIL

PISTON

VALVULA

VALVULA CHECK DEINGRESO DE COMBUSTIBLE

PIN

ESPACIADOR

ADAPTADOR

ESPACIADOR

ARMADURA

SOLENOIDE

ARANDELA

VARILLA (PLUNGER)

MANGUITO

MANGUITO

UNIT INJECTOR COMPONENTS

SELLO INFERIOR DE COMBUSTIBLE

CUERPO DE VALVULA

SELLO SUPERIOR DE COMBUSTIBLE

BOQUILLA

CHECK

-

HORIZONTALBOLTS

JUMPER TUBE

INJECTOR CLAMP

VERTICALBOLTS

INJECTOR INSTALLATIONALLEN

SCREWS

INJECTOR OILADAPTOR

- 59 -

SOLENOID DE-ENERGIZED SOLENOID ENERGIZEDPOPPET VALVE CLOSED POPPET VALVE OPEN

ARMATURESCREW

POPPETSPRING

INLETVALVE SEAT

SOLENOID

POPPET VALVE

ARMATURE

EXHAUSTVALVE SEAT

VALVE BODY GROUP

- 60 -

FUEL INLETCHECK VALVE

INTENSIFIERPISTON

PLUNGER

FUEL TONOZZLE

BARREL

BARREL GROUP

FUEL PRESSURE INCREASE

REVERSE FLOWCHECK VALVE

FUEL FROMTRANSFER PUMP

SUPPLY OIL

- 61 -

VIEW OF STOP PLATE & REVERSE FLOW CHECK VALVE


FUEL ATOMIZATION

NOZZLE GROUP

CHECK VALVE

- 62 -

INLETVALVE SEAT

SOLENOID

POPPET VALVE

ARMATURE

EXHAUSTVALVE SEAT

SOLENOID DE-ENERGIZED

VALVE BODY GROUP- 63 -

SHIM

BARREL

PISTON

VALVE

BALL

PIN

SPACER

ADAPTER

SPACER

ARMATURE

SOLENOID

WASHER

PLUNGER

SLEEVE

SLEEVE

NOZZLE

BODY

UNIT INJECTOREND OF INJECTION

CHECK

- 64 -

BARREL GROUPREFILLING THE BARREL

BARREL

PISTON


PIN

SPACER

WASHER

PLUNGER

SLEEVE

NOZZLE

NOZZLE CHECKVALVE

FUEL EDGEFILTER

- 65 -


EDGE FILTER

EDGE FILTER


FUEL INLET FUEL INLET

- 66 -

PRIME INJECTION RATE SHAPING

0 1 2 3 4TIME (MILLISECONDS)

5

PRIME = PRE-INJECTION METERING INJECTION RATE

DURATIONSTART OF INJECTION

- 67 -

CROSS SECTIONOF PLUNGER

PRIME RATESHAPING PASSAGE

PLUNGER

BARREL

SPILLPORT

FUEL TONOZZLE GROUP

START OF INJECTION PRESSURE DROPFINAL

PRESSURE INCREASE

BARREL GROUPPRIME RATE SHAPINGOIL FLOW

- 68 -

BARREL GROUPVENTING INTERNAL LEAKS

INTENSIFIERPISTON SEAL

VENTINGCHECK VALVE

BARREL

INTENSIFIERPISTON

- 69 -

BARREL GROUP NOZZLE GROUPFUEL INLETCHECK VALVE

NOZZLECHECK VALVE

FUELATOMIZATION

VENTINGCHECK VALVE


INJECTOR CHECK VALVES

- 70 -

VACIO TORQUE PICO RATEADO

INJE

CT

ION

PR

ES

SU

RE

SISTEMA DE COMBUSTIBLEACCIONADO MECANICAMENTE

HEUI

VELOCIDAD DE MOTOR

CONTROL DE PRESION HIDRAULICA DE INYECCION

- 72 -

- 73 -

PUERTO DE CEBADO

ORIFICIO

RESERVORIO

PLATO BASCULANTE

BOMBA DE TRANSFERENCIA

VALVULA COMPENSADORA

BOMBA HEUI

BASE DE LA VALVULA

AL DRENAJE

- 75 -

- 76 -

TO LUBESYSTEM

FUELTRANSFER

PUMP

PUMPCONTROL

VALVE

OILFILTER

OILCOOLER

HEUI

HEUI

OILSUMP

HYDRAULICPRESSURE

SENSOR


SENSOR

OIL PRESSURESENSOR

ECM

COOL DOWNCIRCUIT

COOL DOWN BYPASS CIRCUIT

FUEL TANK

FUELTEMPERATURE

SENSOR

PRESSUREREGULATING

VALVE

SECONDARYFUEL

FILTER

LUBE OILPUMP

PRIMARYFUEL FILTER

WATERSEPARATOR


HYDRAULICSUPPLY

PUMPGROUP

COLD STARTOIL

RESERVOIRFLUID MANIFOLD

HYDRAULIC PASSAGE

DRAIN

.020 IN.ORIFICE

- 77 -

- 78 -

CHECKFITTING SPRINGVALVE BLOCK SEAT

REVERSE FLOW CHECK VALVE

FROMPUMP

TOINJECTORS

SEAT(END VIEW)

- 79 -

- 80 -

- 81 -

TO LUBESYSTEM

PUMPCONTROL

VALVE

OILFILTER

3408E/3412E HEUI FUEL SYSTEM HYDRAULIC SYSTEM OPERATION

OILCOOLER

LUBE OILPUMP

HEUI

HEUI

OILSUMP

HYDRAULICPRESSURE

SENSOR


SENSOR

OIL PRESSURESENSOR

HYDRAULICSUPPLY

PUMPGROUP

COOL DOWNCIRCUIT

FUEL TANK

FUELTEMPERATURE

SENSOR

PRESSUREREGULATING

VALVE

SECONDARYFUEL

FILTER

FUELTRANSFER

PUMP


COLD STARTOIL

RESERVOIR

PRIMARYFUEL

FILTER

ECM


- 82 -

AL SISTEMA DELUBRICACION

AL MANIFOLDDERECHO

AL MANIFOLDIZQUIERDO

RESERVORIO DEARRANQUE EN FRIO

SUMIDERO DE ACEITEVALVULA DECONTROLDE BOMBA

CARRETESENSADODE CARGA

CARRETELIMITADOR

DE PRESION

DRENAJE DECARCAZA DE BOMBA

SOLENOID(ENERGIZED)

PISTON DE CONTROLDE DESPLAZAMIENTO

SISTEMA DE CONTROL HIDRAULICO HEUIARRANQUE

VALVULA CHECK

BOMBA DE SUMINISTRO

CARRETE LIMITADOR DE PRESION

VALVULA CHECK

VALVULA DE CONTROLDE BOMBA

ORIFICIO DE DRENAJE

ORIFICIO

ALDRENAJE DECARCAZA

CARRETE DE SENSADO DE CARGA

DEL PISTON DE CONTROL DEDESPLAZAMIENTO

VALVULAS CHECKDE FLUJO EN REVERSA

ARRANQUE

CONJUNTO DE COMPENSADOR

AL DRENAJE DE LA CARCAZA

TO LUBESYSTEM

TO RIGHT OILMANIFOLD

TO LEFT OILMANIFOLD

COLD STARTRESERVIOR

OIL SUMPPUMP

CONTROLVALVE

LOADSENSINGSPOOL

PRESSURELIMITERSPOOL

PUMPCASE DRAIN

SOLENOID(DE-ENERGIZED)

HEUI HYDRAULIC CONTROL SYSTEMDESTROKE

CHECK VALVE

DISPLACEMENTCONTROL PISTON

SUPPLY PUMP

- 85 -

PUMPCONTROL VALVE

DRAIN ORIFICE

TO DISPLACEMENT CONTROL PISTON

TO CASE DRAIN

PRESSURELIMITER SPOOL

CHECK VALVE

ORIFICE

LOAD SENSINGSPOOL

DESTROKECOMPENSATOR ASSEMBLY

- 86 -

TO LUBESYSTEM


TO LEFT OILMANIFOLD

COLD STARTRESERVIOR

OIL SUMPPUMP

CONTROLVALVE

LOADSENSINGSPOOL


PUMPCASE DRAIN

SOLENOID(ENERGIZED)

HEUI HYDRAULIC CONTROL SYSTEMUPSTROKE

CHECK VALVE


SUPPLY PUMP

- 87 -

PRESSURELIMITER SPOOL

CHECK VALVE

ORIFICE

LOAD SENSINGSPOOL

PUMPCONTROL VALVE

DRAIN ORIFICE

FROMDISPLACEMENT

CONTROL PISTON

TO CASE DRAIN

UPSTROKE

COMPENSATOR ASSEMBLY

- 88 -

TO LUBESYSTEM


TO LEFT OILMANIFOLD

COLD STARTRESERVIOR

OIL SUMPPUMP

CONTROLVALVE

LOADSENSINGSPOOL


PUMPCASE DRAIN

SOLENOID(DE-ENERGIZED)

HEUI HYDRAULIC CONTROL SYSTEMPRESSURE LIMITER OPERATION


SUPPLY PUMP

PLUGGEDORIFICE

- 89 -

PRESSURE LIMITERSPOOL

CHECK VALVE

ORIFICE

LOAD SENSINGSPOOL

PUMPCONTROL VALVE

DRAIN ORIFICE

TODISPLACEMENT

CONTROL PISTON

TO CASE DRAIN

PLUGGEDORIFICE

PRESSURE LIMITER OPERATION

COMPENSATOR ASSEMBLY

- 90 -

ADAPTER CAGE

RINGSHELLPIN

STATOR

SEAL SEATPOPPETVALVE

SOLENOIDARMATURE

STOP

TOCASE DRAIN

FROM LOADSENSING SPOOL

VALVE

VALVEBLOCK

NO CURRENT FLOW

COILASSEMBLY

PUMP CONTROL VALVE

EDGE FILTER

SPRINGRETAINER

- 91 -

ADAPTADOR JAULA

GCORAZA O´RINGPIN

ESTATOR

SELLO ASIENTOVALVULAPOPPET

SOLENOIDEDARMADURA

DETENCION

DRENAJE DE CARCAZABLOQUE DEVALVULA

CONJUNTO DEBOBINA

FLUJO ALTO DE CORRIENTE

VALVULA DE CONTROL DE BOMBA

FILTRO DE BORDE

RESORTE DERETENCION

DE LA VALVULADE SENSADO DE

CARGA

- 92 -

HEUI SYSTEM POWER SUPPLIES

• ECM: 24 VOLTS

• INJECTORS: 105 VOLTS

• ANALOG SENSORS: 5 VOLTS

• SPEED/TIMING SENSORS: 12.5 VOLTS

• DIGITAL SENSORS: 8 VOLTS

• PUMP CONTROL VALVE: 0 to 24 VOLTS

- 93 -

ADEM IIELECTRONIC

CONTROLMODULE

(ECM)GROUND

BOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH

TURBO OUTLET PRESS. SENSOR

SECONDARYSPEED/TIMING SENSOR

PRIMARYSPEED/TIMING SENSOR

HYDRAULICPRESSURE SENSOR

24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS

PUMPCONTROL VALVE

COOLANT TEMP. SENSOR

ATMOSPHERIC PRESS. SENSOR

OIL PRESSURE SENSOR

HYDRAULIC TEMP. SENSOR

FUEL TEMPERATURE SENSOR

COOLANT FLOW SWITCH

8 OR 12INJECTORS


INSTRUMENTPANEL

AUTO RETARDER CONTROL

EPTC II TRANSMISSION CONTROL

ELECTRONIC SERVICE TOOL

CAT DATA LINK

FAN

FAN SPEED SENSOR

FAN CONTROL VALVE

TURBO INLET PRESSURE SENSOR

THROTTLE BACK-UP, ELEVATED LOW IDLE ENABLE,AND GROUND LEVEL SHUTDOWN (2) SWITCHES

THROTTLESENSOR

ACCELERATORPEDAL

DISCONNECT SWITCH

3408E/3412E HEUI SYSTEMECM POWER SUPPLY COMPONENTS

MACHINEHARNESS

- 94 -

0511040623

ECM(3408E/3412E)

(-) BATTERIA(-) BATTERIA(+) BATTERIA(+) BATTERIA

KEY SWITCH ON

229-BK-14229-BK-14150-RD-14150-RD-14113-OR

12

26

24 VOLTIOS DC

(+)

(-)

PERNO A TIERRAEN EL MOTOR

CIRCUIT BREAKER

BATTERIA

R

C

SB ST

OFFON

308-YL

200-BK

105-RD

SWITCH DE ARRANQUE

112-PU

117-RD

113-OR

15 A

10 AMPP3 J3

P1 J1

CIRCUITO DE SUMINISTRO DE ENERGIA AL ECM

SWITCH DEDESCONEXION

393229381812

732-PK996-GN998-BR999-WHF723-PKF724-PU

VELOC. SEC. DE MOTOR+V TIMINGDIGITAL RETURNVELOC.PRIM DE MOTORTIMING CAL +TIMING CAL -

ECM(3408E/3412E)

P2 J2

ABC

ORBKWH

SENSORSPEED/TIMINGSECUNDARIO (LH)

ABC

ORBKWH

SENSORSPEED/TIMINGPRIMARIO (RH)

SUMINISTRO DEPOTENCIA A LOS SENSORES DE VELOCIDAD

12.5 ± 1 VOLTS

P44 J44

P20 J20

P1 J1

160532

A701-GYF726-YLA703-BRF726-YL

P2 J2

INJECTOR WIRING SCHEMATIC

SOLENOID 1 POWERSOLENOID 1/3 RETURNSOLENOID 3 POWER

ECM(3408/3412E)

401134

A702-PUF727-BUA704-GNF727-BU


321738

A705-BUF728-BRA707-PUF728-BR


282122

A706-GYF729-GNA708-BRF729-GN


372731

A709-ORF730-GYA711-PUF730-GY


183312

A710-GYF731-ORA712-BRF731-OR


1234

SOLENOID 1

SOLENOID 3

J52/P52

1234

SOLENOID 2

SOLENOID 4

J56/P56

1234

SOLENOID 5

SOLENOID 7

J53/P53

1234

SOLENOID 6

SOLENOID 8

J57/P57

1234

SOLENOID 9

SOLENOID 11

J54/P54

1234

SOLENOID 10

SOLENOID 12

J58/P58

- 97 -

P22 J22

SENSOR DE TEMPERATURAREFRIGERANTE DE MOTOR

SENSOR DE PRESIONACEITE DE MOTOR

+V ANALOGANALOG RETURNSIGNAL


P23 J23

SENSOR DE PRESIONSALIDA DEL TURBO


P25 J25

SENSOR DE PRESION ENTRADA DEL TURBO


P27 J27

SENSOR DEPRESION ATMOSFERICA


P45 J45

SENSOR DE PRESIONDE ACEITE


3630

SUMINBISTRO DE ENERGIASENSORES ANALOGOS

P1 J1

P43 J43


SENSOR DE TEMPERATURA COMBUSTIBLE

P51 J51



ABC

ABC

ABC

ABC

ABC

ABC

ABC

ABC

J21 P21

5 ± 0.2 VOLTS

ECM (3408E/3412E HEUI)+V ANALOG SUPPLYANALOG RETURN

ECM (3408E/3412E HEUI)+ V DIGITAL SUPPLY- V DIGITAL RETURN

2935

DIGITAL SENSORPOWER SUPPLY

P1 J1

ABC

J35 P35

ABC

P84 J84

+V DIGITALDIGITAL RETURN

SIGNAL

FAN SPEED SENSOR

THROTTLEPOSITION SENSOR


SIGNAL

8 ± 0.5 VOLTS

- 99 -

ECM (3408E/3412E HEUI)+ SUPPLY- RETURN

2935

P2 J2

AB

J46 P46

PUMP CONTROLVALVE

SUPPLY RETURN

PUMP CONTROL VALVEPOWER SUPPLY

0 to 24 VOLTS PWM0 to 800 mAmps

- 100

ELECTRONIC SENSORS AND SYSTEMS

- 101

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH



24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS

8 OR 12INJECTORS


DISCONNECT SWITCH

HEUI SYSTEMCOMPONENT DIAGRAM

MACHINEHARNESS

- 102

ANALOG SENSORS

• Fuel temperature

• Hydraulic temperature

• Lubrication oil pressure

• Turbocharger outlet pressure

• Turbocharger inlet pressure

• Atmospheric pressure

• Coolant temperature

• Hydraulic pressure

- 103

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY KEY

SWITCH




24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS

8 OR 12INJECTORS


DISCONNECT SWITCH


MACHINEHARNESS

- 104

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH




24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS


8 OR 12INJECTORS


DISCONNECT SWITCH


MACHINEHARNESS

- 105

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH




24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS



8 OR 12INJECTORS


DISCONNECT SWITCH


MACHINEHARNESS

- 106

100%

98%

96%

94%

92%

90%

88%

86%

84%

82%

80%

78%

76%

74%

77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53

8,210

8,920

9,630

10,340

11,050

11,760

12,470

13,890

14,600

15,310

16,020

16,730

17,440

13,180

7,500

72%

ENGINE POWER DERATING MAPACCORDING TO ATMOSPHERIC PRESSURE

ATMOSPHERIC PRESSURE IN kPa

PE

RC

EN

T O

F F

UL

L L

OA

D P

OW

ER

AL

TIT

UD

E I

N F

EE

T

- 107

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH




24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS



8 OR 12INJECTORS



DISCONNECT SWITCH


MACHINEHARNESS

- 108

CAT

AUTOMATIC AIR FILTER COMPENSATION

TURBOCHARGERINLET PRESSURE

SENSOR

ATMOSPHERICPRESSURE

SENSOR

Filter differential pressure calculated with formula:

Atmospheric sensor pressure - Turbo sensor pressure = ∆P

Fuel limited 2% per 4 inches H20 to max 20%

- 109

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS



8 OR 12INJECTORS



DISCONNECT SWITCH


MACHINEHARNESS

- 110

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS



OIL PRESSURE SENSOR

8 OR 12INJECTORS



DISCONNECT SWITCH


MACHINEHARNESS

- 111

OIL

PR

ES

SU

RE

IN

kP

a

600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 180060

80

100

120

140

160

180

200

220

240

260

280

300

ENGINE RPM

OIL PRESSURE MAP

1900

320

340

8.7

11.6

14.5

17.4

20.3

23.2

26.1

29

31.9

34.8

37.7

40.6

43.5

46.4

49.3

OIL

PR

ES

SU

RE

IN

PS

I

kPa x 0.145 = PSI

2000

- 112

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH

TURBO OUTLET (BOOST) PRESS. SENSOR




24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS



OIL PRESSURE SENSOR


8 OR 12INJECTORS



DISCONNECT SWITCH


MACHINEHARNESS

- 113

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH


BACKUP CAMSPEED/TIMING SENSOR

PRIMARY CAMSPEED/TIMING SENSOR


24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS



OIL PRESSURE SENSOR

HYDRAULIC TEMP SENSOR


8 OR 12INJECTORS



DISCONNECT SWITCH


MACHINEHARNESS

- 114

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS



OIL PRESSURE SENSOR



COOLANT FLOW SWITCH

8 OR 12INJECTORS



DISCONNECT SWITCH


MACHINEHARNESS

- 115

• Throttle Position

• Pump Control Valve Signal

• Exhaust Temperature

DIGITAL SENSORS AND CIRCUITS

- 116

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS



OIL PRESSURE SENSOR



COOLANT FLOW SWITCH

8 OR 12INJECTORS



THROTTLESENSOR

ACCELERATORPEDAL

DISCONNECT SWITCH


MACHINEHARNESS

- 117

90%

ON

OFF

ON

OFF

ON

OFF

10%

50%

DUTYCYCLE

DUTY CYCLE = PERCENT OF TIME ON VS PERCENT OF TIME OFF

1 CYCLE

= 90%

DUTYCYCLE

= 50%

DUTYCYCLE

= 10%

PULSE WIDTH MODULATED SIGNALS

- 118

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS

PUMP CONTROL VALVE



OIL PRESSURE SENSOR



COOLANT FLOW SWITCH

8 OR 12INJECTORS



THROTTLESENSOR

ACCELERATORPEDAL

DISCONNECT SWITCH


MACHINEHARNESS

- 119

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS

PUMP CONTROL VALVE



OIL PRESSURE SENSOR



COOLANT FLOW SWITCH

8 OR 12INJECTORS




THROTTLESENSOR

ACCELERATORPEDAL

DISCONNECT SWITCH


MACHINEHARNESS

- 120

ECM (3408E/3412E HEUI)USER SHUTDOWN1

P2 J2

USER DEFINED SHUTDOWN

12

J3

USER SHUTDOWNDEVICE

- 121

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS

PUMP CONTROL VALVE



OIL PRESSURE SENSOR



COOLANT FLOW SWITCH

8 OR 12INJECTORS


FAN

FAN SPEED SENSOR

FAN CONTROL VALVE



THROTTLESENSOR

ACCELERATORPEDAL

DISCONNECT SWITCH


MACHINEHARNESS

- 122

28291940

ECM(3408E/E3412E)

ETHER SWITCH

308-YL

200-BK

P1 J1

ETHER INJECTION SYSTEM

ETHER SW LAMP

DIGITAL RETURNETHER REQUEST

ETHER CONTROL

P2 J2

F708-YL

998-BR

721-GY

710-BR

J3 P323 93921

RELAY

12

+24V

+310-PK

200-BKP37 J37

ETHERSTART VALVE TO ENGINE

FROMCYLINDER

- 123

VIMS DISPLAY MODULES

COMMUNICATION

ADAPTER

7X1701

CONTROL SERVICE TOOL

SERVICETOOL

CONNECTOR CAT DATA LINK

VIM

SM

AIN

MO

DU

LE

ADEM IIELECTRONIC

CONTROLMODULE

(ECM)

LAPTOPCOMPUTER

CATELECTRONIC TECHNICIAN

- 124

988F/990 CAT DATA LINK CIRCUIT

89

POWERTRAIN CONTROLMODULE

Cat Data Link +Cat Data Link -

2324

CMS

Cat Data Link +Cat Data Link -

DEHJ

76

3132

9371

893-GN892-BRE794-YL

E-793-BU

J42 P3 J3 P1 J1 ECM

Cat Data Link +Cat Data Link -ATA Data Link +ATA Data Link -

SERVICE TOOLCONNECTOR

MACHINE INTERFACECONNECTOR

- 125

LOGGED EVENTS

• Engine overspeed

• Air inlet restriction

• User defined shutdown

• Hydraulic system pressure fault

• Abnormal hydraulic pressure

• Low (lube) oil pressure

• Loss of coolant flow

• High coolant temperature

• Low fuel pressure

- 126

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS

PUMP CONTROL VALVE



OIL PRESSURE SENSOR

HYDRAULIC TEMP SENSOR


COOLANT FLOW SWITCH

8 OR 12INJECTORS


INSTRUMENTPANEL

AUTO RETARDER CONTROL

EPTC II TRANSMISSION CONTROL

SERVICE TOOL CONNECTOR

CAT DATA LINK

FAN

FAN SPEED SENSOR

FAN CONTROL VALVE



THROTTLESENSOR

ACCELERATORPEDAL

DISCONNECT SWITCH


MACHINEHARNESS

- 127

MACHINE APPLICATIONS

- 128

3529

ECM(3408E/3412E)

DECELERATIONPOSITION SENSOR

P1 J1

DECELERATION POSITION SENSOR CIRCUIT

+V DIGITAL SUPPLY

DIGITAL RETURN

P2 J2

24 DECEL POSITION

A700-OR

998-BR

P38 J38

ABC


SIGNAL

F702-GN

- 129

22081429

ECM(3408E/3412E)

THROTTLESWITCH

P1 J1

THROTTLE SWITCH CIRCUIT

THROTTLE - LOW IDLETHROTTLE - H.I. PARITYTHROTTLE - L.I. PARITYTHROTTLE - HIGH IDLEDIGITAL RETURN

F715-PUF718-BUF716-WHF717-YL998-BR

- 130

252429

ECM(3408E/3412E)

CRANK WITHOUTINJECTION PLUG

P1 J1

CRANK WITHOUT INJECTION PLUG CIRCUIT

CRANK W/O INJECT (NO)720-GN

719-BR

J24 P24

998-BR

321

CRANK W/O INJECT (NC)

DIGITAL RETURN

BK

PLUG "HHH"

PLUG "JJJ"

BK

- 131

352913

ECM(3408E/E3412E)

ENGINE FANSPEED SENSOR

P1 J1

MECHANICAL ENGINE FAN CONTROL CIRCUIT

+V DIGITAL SUPPLY

DIGITAL RETURN

P2 J2

197

25

VARIABLE FAN CLUTCHPWM DR AND SOL RETURNENGINE FAN SPEED

A700-OR

998-BR

J84 P84

ABC


SIGNAL

F703-GY

P41 J41

BC

ENGINE FANSOLENOID VALVE

E799-BRF700-BU

A/C ON (INPUT FROMCOMPRESSOR SWITCH)

- 132

F706-PU

ECMP1 J1

13192927142024

Throttle Lock RH Brake (NO)Throttle Lock RH Brake (NC)Digital ReturnThrottle Lock ON LampThrottle Lock Set/DeclerateThrottle Lock Resume/AccelerateThrottle Lock ON/OFF

998-BR

RIGHT BRAKE PEDAL SWITCH

F721-GYF722-OR

THROTTLELOCK LAMP

J3 P3

2

113-OR BATT+

F717-YLF718-BU

F719-BR

998-BR

998-BR

998-BR

998-BR

998-BR

THROTTLE LOCKSET/DECLERATION SW

THROTTLE LOCKRESUME/ACCLERATION SW

THROTTLE LOCK SW

THROTTLE LOCK CIRCUIT

- 133

ECM(3408E/E3412E)P2 J2

1907

HYDRAULIC FANPWM DRIVE AND SOL RETURN

P86 J86

21

HYDRAULIC FANSOLENOID VALVE

E799-BR

F700-BU

HYDRAULIC ENGINE FAN CONTROL CIRCUIT

- 134

R0

5

10

15

20

25

30

P

X100

24 VMPHkm/h

44

AUT

SISTEMA DE MONITOREO CATERPILLAR

INLET AIR TEMP. SENSOR

SERVICE TOOL CONNECTOR

DATA LINK

EMSPANEL

DIAGNOSTIC LAMP

ALARM /WARNING LAMP

TO AIR SHUTOFF SOLENOID

TO ETHER SOLENOID RELAY

ADEM IIELECTRONIC

CONTROLMODULE

(ECM) GROUNDBOLT

15 AMPBREAKER

MAINPOWER RELAY

KEYSWITCH





24 V

MACHINEINTERFACE

CONNECTOR

ENGINEHARNESS

PUMP CONTROL VALVE



OIL PRESSURE SENSOR



8 OR 12INJECTORS


PTO ENABLE/PTO UP/DOWN SWITCHESENGINE SHUTDOWN SWITCH

ETHER ENABLE/OVERRIDE SWITCHEMERGENCY STOP/VERIFY SWITCH

USER DEFINED SHUTDOWN

THROTTLE POSITION SENSOR

DISCONNECT SWITCH

INDUSTRIAL3408E/3412E HEUI SYSTEM

COMPONENT DIAGRAM

MACHINEHARNESS

FUEL PRESS. SENSOR

COOLANT LEVEL SWITCH

MAINTENANCE INDICATOR LAMP

- 137

PUMPCONTROL

VALVE

OILFILTER

OILCOOLER

HEUI

HEUI

OILSUMP

HYDRAULICPRESSURE

SENSOR

HYDRAULIC OILTEMPERATURE

SENSORCOLD START

OILRESERVOIR OIL PRESSURE

SENSOR

ECM

HYDRAULICSUPPLY

PUMPGROUP

COOL DOWNCIRCUIT

FUEL TANK

FUELTEMPERATURE

SENSOR

PRESSUREREGULATING

VALVE

SECONDARYFUEL

FILTER

FUELTRANSFER

PUMP

PRIMARYFUEL FILTER

WATERSEPARATOR

LUBE OILPUMP

TO LUBESYSTEM

FLUID MANIFOLD

FLUID MANIFOLD

3408E/3412E HEUI FUEL SYSTEM

- 138

caterpillar heui-controles-de-motor-3408 e-3412

Automotive