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CONTROLES DE MOTOR 3408E/3412
HYDRAULIC ELECTRONIC UNIT INJECTION(HEUI)
©1997 Caterpillar Inc.
- 1 -
- 2 -
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
FLUID MANIFOLDHYDRAULIC PASSAGE
- 3 -
- 4 -
- 5 -
- 6 -
- 7 -
- 8 -
- 9 -
- 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
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
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 -
ROTACION DE LA RUEDA DE SINCRONIZACION
CIL NO. 3BORDE DE
REFERENCIA
CIL NO. 4TDC
CIL NO. 4BORDE DE
REFERENCIA
CIL NO. 8BORDE DEREFERENCIA
CIL NO. 3TDC
TABLA DE DIENTES DE ENGRANAJE DE SINCRONIZACION
CILINDRODE REFERENCIA
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 -
TABLA DE DIENTES DE ENGRANAJE DE SINCRONIZACION
PORCENTAJEPWM
CILINDRODE REFERENCIA
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
ROTACION DE LA RUEDA DE SINCRONIZACION
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
TIEMPO (MILISEGUNDOS)
CORRIENTE
POPPETLIFT
5
- 36 -
FORMA DE ONDA Y CARACTERISTICAS DE RESPUESTA
0 1 2 3 4
CU
RR
EN
T
FL
OW
TIEMPO (MILISEGUNDOS)
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 -
VALVULA DECONTROLDE BOMBA
FILTRO DE ACEITE
ENFRIADOR DE ACEITE
HEUI
HEUI
SUMIDERODE ACEITE
SENSOR DEPRESION
DE ACEITE
SENSOR DETEMPERATURA
DE ACEITERESERVORIO
DE ACEITEARRANQUE 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
FLUID MANIFOLDHYDRAULIC PASSAGE
- 4 2 -
- 43 -
- 44 -
AL SISTEMA DE LUBRICACION
BOMBA DETRANSFERENCIA
DE COMBUST.
VALVULA DECONTROLDE BOMBA
FILTRO DEACEITE
SISTEMA DE COMBUSTIBLE HEUI 3408E/3412E
ENFRIADOR DE ACEITE
HEUI
HEUI
OILSUMP
SENSOR DEPRESION
DE ACEITE
SENSOR DETEMPERATURA
DE ACEITE
SENSOR DEPRESION DE ACEITE
ECM
COOL DOWNCIRCUIT
SUMINISTRO DE BAJA PRESION DE ACEITE
TANQUE DE COMBUSTIBLE
SENSOR TEMPERATURA
DE COMBUST.
VALVULAREGULADORA DE
PRESION
FILTROSECUNDARIODE COMBUST.
FILTRO PRIMARIOY SEPARADOR
DE AGUADE PETROLEO
BOMBA DE LUBRICACION
RESERVORIODE ACEITE
ARRANQUE EN FRIO
GRUPO DEBOMBA DE
SUMINISTRODE ACEITE
FLUID MANIFOLDHYDRAULIC PASSAGE
FLUID MANIFOLDHYDRAULIC PASSAGE
- 45 -
AL SISTEMA DE LUBRICACION
BOMBA DETRANSFERENCIA
DE COMBUST.
VALVULA DECONTROLDE BOMBA
FILTRO DEACEITE
SISTEMA DE COMBUSTIBLE HEUI 3408E/3412E
ENFRIADOR DE ACEITE
HEUI
HEUI
SUMIDERO DE ACEITE
SENSOR DEPRESIONDE ACEITE
SENSOR DETEMPERATURA
DE ACEITE
SENSOR DEPRESION DE ACEITE
GRUPO DEBOMBA DESUMINISTRODE ACEITE
COOL DOWNCIRCUIT
ACEITE A ALTA PRESION
SENSOR TEMPERATURA
DE COMBUST.
ECM
TANQUE DE COMBUSTIBLE
VALVULAREGULADORA DE
PRESION
FILTROSECUNDARIODE COMBUST.
FILTRO PRIMARIOY SEPARADOR
DE AGUADE PETROLEO
BOMBA DE LUBRICACION
RESERVORIODE ACEITE
ARRANQUE EN FRIOFLUID MANIFOLD
HYDRAULIC PASSAGE
FLUID MANIFOLDHYDRAULIC PASSAGE
- 46 -
AL SISTEMA DE LUBRICACION
BOMBA DETRANSFERENCIA
DE COMBUST. VALVULAREGULADORA DE
PRESION
VALVULA DECONTROLDE BOMBA
FILTRO DEACEITE
3408E/3412E HEUI FUEL SYSTEM
ENFRIADOR DE ACEITE
BOMBA DE LUBRICACION
HEUI
HEUI
SUMIDERO DE ACEITE
SENSOR DEPRESIONDE ACEITE
HYDRAULICTEMPERATURE
SENSOR
OIL PRESSURESENSOR
ECM
COOL DOWNCIRCUIT
SUMINISTRO DE PETROLEO A BAJA PRESION
SENSOR TEMPERATURA
DE COMBUST.
TANQUE DE COMBUSTIBLE
FILTROSECUNDARIO(2 MICRON)
FILTRO PRIMARIOY SEPARADOR
DE AGUADE PETROLEO
COLD STARTOIL
RESERVOIR
HYDRAULICSUPPLY
PUMPGROUP
FLUID MANIFOLDHYDRAULIC PASSAGE
FLUID MANIFOLDHYDRAULIC PASSAGE
- 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
REVERSE FLOWCHECK 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
FUEL INLETCHECK VALVE
PIN
SPACER
WASHER
PLUNGER
SLEEVE
NOZZLE
NOZZLE CHECKVALVE
FUEL EDGEFILTER
- 65 -
REVERSE FLOWCHECK VALVE
EDGE FILTER
EDGE FILTER
FUEL INLETCHECK VALVE
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
REVERSE FLOWCHECK 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
HYDRAULICTEMPERATURE
SENSOR
OIL PRESSURESENSOR
ECM
COOL DOWNCIRCUIT
COOL DOWN BYPASS CIRCUIT
FUEL TANK
FUELTEMPERATURE
SENSOR
PRESSUREREGULATING
VALVE
SECONDARYFUEL
FILTER
LUBE OILPUMP
PRIMARYFUEL FILTER
WATERSEPARATOR
FLUID MANIFOLDHYDRAULIC PASSAGE
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
HYDRAULICTEMPERATURE
SENSOR
OIL PRESSURESENSOR
HYDRAULICSUPPLY
PUMPGROUP
COOL DOWNCIRCUIT
FUEL TANK
FUELTEMPERATURE
SENSOR
PRESSUREREGULATING
VALVE
SECONDARYFUEL
FILTER
FUELTRANSFER
PUMP
FLUID MANIFOLDHYDRAULIC PASSAGE
COLD STARTOIL
RESERVOIR
PRIMARYFUEL
FILTER
ECM
FLUID MANIFOLDHYDRAULIC PASSAGE
- 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 RIGHT OILMANIFOLD
TO LEFT OILMANIFOLD
COLD STARTRESERVIOR
OIL SUMPPUMP
CONTROLVALVE
LOADSENSINGSPOOL
PRESSURELIMITERSPOOL
PUMPCASE DRAIN
SOLENOID(ENERGIZED)
HEUI HYDRAULIC CONTROL SYSTEMUPSTROKE
CHECK VALVE
DISPLACEMENTCONTROL PISTON
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 RIGHT OILMANIFOLD
TO LEFT OILMANIFOLD
COLD STARTRESERVIOR
OIL SUMPPUMP
CONTROLVALVE
LOADSENSINGSPOOL
PRESSURELIMITERSPOOL
PUMPCASE DRAIN
SOLENOID(DE-ENERGIZED)
HEUI HYDRAULIC CONTROL SYSTEMPRESSURE LIMITER OPERATION
DISPLACEMENTCONTROL PISTON
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
TDC SERVICEPROBE ACCESS
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
SOLENOID 2 POWERSOLENOID 2/4 RETURNSOLENOID 4 POWER
321738
A705-BUF728-BRA707-PUF728-BR
SOLENOID 5 POWERSOLENOID 5/7 RETURNSOLENOID 7 POWER
282122
A706-GYF729-GNA708-BRF729-GN
SOLENOID 6 POWERSOLENOID 6/8 RETURNSOLENOID 8 POWER
372731
A709-ORF730-GYA711-PUF730-GY
SOLENOID 9 POWERSOLENOID 9/11 RETURNSOLENOID 11 POWER
183312
A710-GYF731-ORA712-BRF731-OR
SOLENOID 10 POWERSOLENOID 10/12 RETURNSOLENOID 12 POWER
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
+V ANALOGANALOG RETURNSIGNAL
P23 J23
SENSOR DE PRESIONSALIDA DEL TURBO
+V ANALOGANALOG RETURNSIGNAL
P25 J25
SENSOR DE PRESION ENTRADA DEL TURBO
+V ANALOGANALOG RETURNSIGNAL
P27 J27
SENSOR DEPRESION ATMOSFERICA
+V ANALOGANALOG RETURNSIGNAL
P45 J45
SENSOR DE PRESIONDE ACEITE
+V ANALOGANALOG RETURNSIGNAL
3630
SUMINBISTRO DE ENERGIASENSORES ANALOGOS
P1 J1
P43 J43
+V ANALOGANALOG RETURNSIGNAL
SENSOR DE TEMPERATURA COMBUSTIBLE
P51 J51
+V ANALOGANALOG RETURNSIGNAL
SENSOR DE TEMPERATURA DE ACEITE
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
+V DIGITALDIGITAL RETURN
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
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
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
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
MACHINEHARNESS
- 104
ADEM IIELECTRONIC
CONTROLMODULE
(ECM) GROUNDBOLT
15 AMPBREAKER
MAINPOWER RELAY
KEYSWITCH
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
MACHINEHARNESS
- 105
ADEM IIELECTRONIC
CONTROLMODULE
(ECM) GROUNDBOLT
15 AMPBREAKER
MAINPOWER RELAY
KEYSWITCH
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
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
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
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
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
MACHINEHARNESS
- 110
ADEM IIELECTRONIC
CONTROLMODULE
(ECM) GROUNDBOLT
15 AMPBREAKER
MAINPOWER RELAY
KEYSWITCH
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
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
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP. SENSOR
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
MACHINEHARNESS
- 113
ADEM IIELECTRONIC
CONTROLMODULE
(ECM) GROUNDBOLT
15 AMPBREAKER
MAINPOWER RELAY
KEYSWITCH
TURBO OUTLET PRESS. SENSOR
BACKUP CAMSPEED/TIMING SENSOR
PRIMARY CAMSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP SENSOR
FUEL TEMPERATURE SENSOR
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
MACHINEHARNESS
- 114
ADEM IIELECTRONIC
CONTROLMODULE
(ECM) GROUNDBOLT
15 AMPBREAKER
MAINPOWER RELAY
KEYSWITCH
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP. SENSOR
FUEL TEMPERATURE SENSOR
COOLANT FLOW SWITCH
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
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
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP. SENSOR
FUEL TEMPERATURE SENSOR
COOLANT FLOW SWITCH
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
THROTTLESENSOR
ACCELERATORPEDAL
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
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
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
PUMP CONTROL VALVE
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP. SENSOR
FUEL TEMPERATURE SENSOR
COOLANT FLOW SWITCH
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
THROTTLESENSOR
ACCELERATORPEDAL
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
MACHINEHARNESS
- 119
ADEM IIELECTRONIC
CONTROLMODULE
(ECM) GROUNDBOLT
15 AMPBREAKER
MAINPOWER RELAY
KEYSWITCH
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
PUMP CONTROL VALVE
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP. SENSOR
FUEL TEMPERATURE SENSOR
COOLANT FLOW SWITCH
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
TURBO INLET PRESSURE SENSOR
THROTTLE BACK-UP, ELEVATED LOW IDLE ENABLE,AND GROUND LEVEL SHUTDOWN (2) SWITCHES
THROTTLESENSOR
ACCELERATORPEDAL
DISCONNECT SWITCH
HEUI SYSTEMCOMPONENT DIAGRAM
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
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
PUMP CONTROL VALVE
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP. SENSOR
FUEL TEMPERATURE SENSOR
COOLANT FLOW SWITCH
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
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
HEUI SYSTEMCOMPONENT DIAGRAM
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
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
PUMP CONTROL VALVE
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP SENSOR
FUEL TEMPERATURE SENSOR
COOLANT FLOW SWITCH
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
INSTRUMENTPANEL
AUTO RETARDER CONTROL
EPTC II TRANSMISSION CONTROL
SERVICE TOOL CONNECTOR
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
HEUI SYSTEMCOMPONENT DIAGRAM
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
+V DIGITALDIGITAL RETURN
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
+V DIGITALDIGITAL RETURN
SIGNAL
F703-GY
P41 J41
BC
ENGINE FANSOLENOID VALVE
E799-BRF700-BU
A/C ON (INPUT FROMCOMPRESSOR SWITCH)
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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
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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
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R0
5
10
15
20
25
30
P
X100
24 VMPHkm/h
44
AUT
SISTEMA DE MONITOREO CATERPILLAR
- 136
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
TURBO OUTLET PRESS. SENSOR
SECONDARYSPEED/TIMING SENSOR
PRIMARYSPEED/TIMING SENSOR
HYDRAULICPRESSURE SENSOR
24 V
MACHINEINTERFACE
CONNECTOR
ENGINEHARNESS
PUMP CONTROL VALVE
COOLANT TEMP. SENSOR
ATMOSPHERIC PRESS. SENSOR
OIL PRESSURE SENSOR
HYDRAULIC TEMP. SENSOR
FUEL TEMPERATURE SENSOR
8 OR 12INJECTORS
TDC SERVICEPROBE ACCESS
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
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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
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