Holset HE341Ve Service Manual

Holset HE341Ve

Service Manual

Copyright 2007, Cummins Turbo Technologies Ltd. All rights reserved.
VGT, Command Valve and Super MWE are trade marks of Cummins Turbo Technologies Ltd.
Holset and the Holset Logo are registered trade marks of Cummins Turbo Technologies Ltd.

Cummins and the Cummins logo are registered trade marks of Cummins Inc.

HE341Ve Service Manual Foreword

Foreword

This publication was written to assist with turbocharger installation, maintenance and overhaul .
The specifications and procedures in this manual are based on information in effect at the time of publication.
Holset Service reserves the right to make any changes at any time without obligation. If differences are found
between your turbocharger and the information in this manual, contact your local Holset approved agent.
The latest technology and the highest quality standards are used in the manufacture of Holset Turbochargers.
When replacement parts are needed, we recommend using only genuine Holset parts.

HE341Ve Service Manual Table of Contents

Table of Contents

1: Introduction

About the Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:1

How to Use the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:1

How to Order Holset Original Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:1

Description and Operation of Turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:2

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:2

Introduction to Variable Geometry Turbochargers . . . . . . . . . . . . . . . . . . . . . 1:2

Notes, Cautions and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:4

Installation Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:5

Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:6

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:7

2: Component Identification

Turbocharger Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:1

Dataplate and CHRA (Core) of Turbocharger . . . . . . . . . . . . . . . . . . . . . . . . 2:1

Installation Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:2

Exploded Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:3

Component List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:4

Purchasable Service Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:5

3: Troubleshooting and Diagnosis

Fault Finding Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3:1

4: Component Testing and Replacement

Service Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:1

On Engine Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:3

Bearing Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:8

Position Sensor Check and Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:9

Position Sensor Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:11

Actuator Check and Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:12

VG Mechanism Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:14

Remote Actuator Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:15

Actuator Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:16

Speed Sensor Check and Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:19

Speed Sensor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:20

6: Service Data Sheets

HX Range Service Data Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6:1

HE341Ve Service Manual Introduction

1:1

About the Manual

The procedures in this manual were developed to instruct in the correct overhaul of the Holset HE341Ve
turbocharger for optimum performance and minimum maintenance operation.

How to Use the Manual

The manual is split into sections designed to provide service information in a logical sequence. The manual
contains links to help the user navigate between relevant sections. Users who are unfamilier with navigating in
PDF documents are refered to Navigating in PDF documents in the Adobe® Acrobat® Reader™ help file.

Contents is an interactive page with links to all the sections. It can be accessed from any page
in the manual by clicking this icon.

Section 1 defines the layout of the manual, introduces the reader to the operation of the turbocharger
and presents important installation guidelines.

Sections 2, 3 and 4 concentrate on Turbocharger Component Identification, Troubleshooting and
Diagnosis, Component Testing and Replacement.

Section 5 identifies the Service and Overhaul procedures to be followed in the unlikley event of a
major turbocharger malfunction. (This section is not available for the HE341Ve turbocharger

range at the present time)

Section 6 quantifies build data to ensure the turbocharger will continue to operate to Holset Service
standard on completion of overhaul.

Manual sections 1 to 5 where applicable, appear as a self extracting compressed file which is organised
according to the steps needed to most easily and correctly maintain the operation of the turbocharger. Users
are required to download this file to hard disk. Section 6 has its own file identity and resides at
www.holset.co.uk. so that Holset can update the Service Data as changes occur. The links between manual
and service data are active only when the user is connected to the Internet.

Chapter 6 has an expiry date to encourage users to discard outdated saved or printed versions and always
access the latest information available at www.holset.co.uk.

When using the manual on-line this icon will link to Holset’s website to help find your nearest agent
for advice and how to order Holset original parts.

How to Order Holset Original Parts

To make sure of optimum performance, certain items must be discarded during disassembly and replaced with
new for re-assembly. These items are indicated in the Service and Overhaul section with the use of a

*

symbol.
All items showing a

*

are available in a basic overhaul kit.

To get the correct parts for your turbocharger, refer to the ‘component identification’ section of this manual to
help you find the following information:

1) Refer to the exploded view and component list to define the major components to be replaced.

2) Refer to the turbocharger’s dataplate which will be found on the compressor housing or actuator to
define the identifying information about your turbocharger build standard.

3) Contact your local Holset agent with componant identification nos. and dataplate assembly no., serial
no. and turbocharger type.

4) With this information, your local agent can provide you with the optimum kit of parts for re-assembling
your turbocharger for continued long life operation.

HE341Ve Service Manual Introduction

Description and Operation of Turbocharger

1:2

General Information

A turbocharger is a mechanical device which uses the engine’s exhaust gases to force more air into the engine
cylinders. Hot exhaust gas energy is used to turn a turbine wheel and shaft. At the other end of the shaft is the
compressor impeller (or compressor wheel), which draws in air and forces it into the engine cylinders.

Supplying increased air mass flow to the engine provides improved engine performance, lower exhaust smoke
density, improved operating economy and altitude compensation. The turbocharger has proven to be one of the
most beneficial devices for improving engine performance. It performs its job very well, as long as it is properly
cared for.

Introduction to Variable Geometry Turbochargers

The need for Variable Geometry

The turbocharger on your vehicle’s engine is of a very advanced type, which varies the effective size of its
turbine in response to the driver’s demands. Under all conditions of driving, the turbine is electronically
controlled to change the amount of air supplied to the engine, to ensure maximum performance, lowest fuel
consumption and minimum exhaust emission levels.

When rapid vehicle acceleration is required, the turbocharger will produce air for the engine more quickly than
a conventional unit, thus eliminating turbocharger lag and giving improved vehicle drivability. As the engine and
turbocharger run in, and eventually start to wear, the combination of the variable turbine and its associated
electronic control, will change its characteristic to keep to the original performance and emission levels over a
wide range of ambient temperatures and altitude.

The importance of correctly installing a Variable Geometry turbocharger

The bearing housing of your turbocharger and the variable geometry actuator both contain an internal liquid
cooled jacket. The purpose of these is to reduce the operating temperature of the housings, to improve the
operating environment of the position sensor and DC motor and reduce the high soak temperatures produced
when the engine is switched off after being heavily loaded. The addition of liquid cooling has meant that there
are two pairs of pipe connections to the turbocharger, to bring coolant to the housings and to take it away. It is
important to observe the correct installation of these pipes, so that the circulation of the coolant is in the correct
direction, or the effectiveness of the cooling system will be lost and severe damage may result.

HE341Ve Service Manual Introduction

1:3

The advantages of a Variable Geometry (VG) Turbocharging system

You may already have experience of the effect of a Wastegate turbocharger on the performance of your
vehicle.
The advantage of Variable Geometry over a Wastegate system is that all the exhaust gas flows through the
turbine wheel to increase net turbine power output. In addition, turbine power can be set to provide just
sufficient energy to drive the compressor at the desired boost level wherever the engine is operating. Speed,
actuator position and pressure sensors feedback information to the Engine Control Module to provide the
necessary control. As the name suggests a Wastegate turbocharger allows exhaust gas to by-pass the turbine
wheel. This by-passed gas contains energy which is lost to the turbine wheel. Wastegate turbochargers have
no feedback controls.

The Holset VG system works by controlling the width of a nozzle guiding the gas flow into the turbine wheel.
Control is achieved using an electric actuator powered by the vehicle system. The Engine Control Module
continually senses the position of the actuator mechanism, engine operating condition and driver demands. It
signals the actuator DC motor to move the actuator rod to a new position which slides the nozzle ring and
blades relative to the fixed shroud plate. This movement varies the area through which exhaust gas enters the
turbine wheel blades.

Exhaust Gas

Boost Air
Outlet

Air Inlet

Exhaust Outlet

Boost Air Outlet

Speed
Sensor

Turbine

Compressor

Operating
Yoke

Sliding Nozzle Ring
and Blades Extended

Fixed
Shroud
Plate

Turbocharger Speed

Exhaust Outlet Pressure

Actuator Position

Actuator Control Signal

Engine Control Module (ECM)

Engine Speed

Throttle Demand

Exhaust Manifold Pressure

Inlet Manifold

Pressure & Temperature

Contains pre-set data on

airflow requirements for

any fuel quantity injected

at any engine speed,

with built-in safety

features for excessive

boost, smoke or

turbocharger speed.

Fuel Injection Pump Information

Ambient Pressure and Temperature

HE341Ve Service Manual Introduction

1:4

Notes, Cautions and Warnings

Notes, Cautions and Warnings are used in this manual to emphasise important or critical instructions.
Note

Information which is essential to highlight.

Caution

Maintenance or Service procedures which if not strictly followed, will result in damage or destruction of the
turbocharger.

Warning

Maintenance or Service procedures which if not correctly followed will result in personal injury or loss of life.

Note

Holset Service receives many turbocharger returns that are no fault found. Before assuming the turbocharger
is not performing to specification always refer to the engine diagnostic system and the troubleshooting
diagnostic procedures of this manual.

Warning

Turbocharger surface temperature during operation can achieve 700°C (1300°F). The designated
turbocharger weighs up to 18.3 kg (40.5 lb) and is fitted with external parts that are sensitive to manual
handling. They include electrical wiring and connectors.

Caution

This variable geometry turbocharger has been factory balanced using the core balance process.
Service overhaul/repair must be carried out by Holset Engineering to ensure the variable geometry system is

correctly rebuilt. It is important to note that operating a turbocharger with rotor or core balance level greater
than design limits could cause turbocharger or engine failure.

Warning

Some parts are manufactured in fluoroelastomers (eg Viton) or similar that require special treatment in the case
of repair and service after fire.

Note

Holset turbochargers can be remanufactured using recovered parts. Where it is necessary to dispose of
components or whole turbochargers, an environmentally responsible process such as recycling should be
used, with due regard to local laws.

Caution

Orientation of the turbine housing of a variable geometry turbocharger is factory set. Any attempt to
re-orientate the housing can cause severe damage to the VG mechanism and may void warranty.

HE341Ve Service Manual Introduction

Installation Data

1:5

1. Holset Service receives many turbocharger returns that are no fault found. Before assuming the
turbocharger is not performing to specification always refer to the engine diagnostic system and the fault
finding chart of this manual to make all the recommended health checks.

2. It is important that intake and exhaust systems are fitted in accordance with the recommendations of
the Equipment and Engine manufacturers. Limiting mass inertia loading is critical to turbocharger whole
life operation. Maximum engine vibration input must not exceed 10g.

3. The air filter must remove particles greater than 5µm at an efficiency of 95% and be of sufficient capacity
to match the air consumption of the engine. Recommended filters should always be used with a pressure
drop indicator. Intake systems must be capable of withstanding depressions up to 6.9 kPa (1.0 lbf/in

2

).

4. Hose and clip connections of intake manifold systems must be capable of withstanding the turbocharger
pressure ratio. V band clamps are preferred and must be used above 3:1 pressure ratio.

5. Exhaust systems must be capable of operating at exhaust back pressures of up to 10 kPa (1.5 lbf/in

2

).
This limit is increased to 13.4 kPa (2.0 lbf/in2) if a catalytic converter is fitted. Exhaust brake applications
are permitted to impose 450 kPa (65.3 lbf/in2) back pressure.

6. Oil should be filtered to 10µm with efficiency of 60% TWA(Time Weighted Average) /20 µm with efficiency
of 85% TWA. Efficiency assessed using ISO Standard 4572/SAE J 1858.

7. The oil quality must be as specified by the engine manufacturer and will be a minimum API SE - CD
(MIL - L - 2104C) specification. Improved life can be obtained by using super high performance diesel
(SHPD) oils, particularly in industrial applications which use extended oil drain periods.

8. Normal oil temperature is 95+/-5°C (203+/-9° F). It should not exceed 120°C (248°F) under any operating
condition.

9. Any pre-lube oil must be clean and meet the minimum CD classification.

10. The orientation of turbine housing, bearing housing and compressor cover is fixed according to
application. During installation, do not attempt to rotate these components as it may affect the operation of
the variable geometry actuating mechanism and may void warranty. Inclined turbocharger installation is
not recommended. If an installed angle is necessary, oil inlet centreline must be +/- 10 degrees from
vertical and rotor centreline +/- 5 degrees from horizontal.

11. Holset permits oil return pipes to decline at an overall angle of not less than 30 degrees below horizontal.
All turbocharger applications require a pipe of internal diameter greater than 19 mm which has integrated
connectors. To ensure oil returns into the engine under all operating conditions, the return connection
into the engine sump must not be submerged and the outlet flange of the turbocharger must be 50 mm
above the maximum oil level of the engine sump pan. Crankcase pressure should be limited ideally to 0.8
kPa (0.12 lbf/in

2

) but 1.4 kPa (0.20 lbf/in2) can be accepted by reference to Holset.

12. Oil pressure of 150 kPa (20 lbf/in

2

) must show at the oil inlet within 3 - 4 seconds of engine firing to

prevent damage to turbocharger bearing system. Aflexible supply pipe is recommended.

13. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in

2

). Normal maximum
operating pressure is 500 kPa (72 lbf/in2) although 600 kPa (88 lbf/in2) is permitted during cold start up.
Under idling conditions pressure should not fall below 70 kPa (10 lbf/in

2

).

14. Recommended oil flows for the turbochargers are 2 litre/min at idle and 3 litre/min above maximum torque
speed.

15. Ensure recommended coolant flows for the separate turbocharger and actuator circuits are achieved:

Turbocharger: 3 litre/min at idle and 5 litre/min above max torque speed
Actuator: 1 litre/min at idle and 3 litre/min above max torque speed

16. Do not use liquid gasket substances or thread sealant as any excess can enter the turbocharger oil
and coolant systems to obstruct flow.

Note:

100 kPa = 1 bar (14.5037 lbf/in

2

=psi).

HE341Ve Service Manual Introduction

Installation Checklist

1:6

1. Always understand why the original turbocharger needs replacing before fitting another unit.

2. Check the turbocharger dataplate to ensure the Part No. is correct for the engine/application.

3. Check the engine exhaust, intake and aftercooler systems are clean and without obstruction i.e. free from

oil, gasket pieces, dust/dirt/carbon or foreign objects.

4. Replace the oil and air filters using replacement parts specified by the equipment manufacturer.

5. Change the engine oil using the type specified by the engine manufacturer.

6. Check that the turbocharger oil inlet and drain pipes and connectors are clean, free from obstruction and

will not leak under pressure. Before re-installing flexible pipes always ensure any burnt-on lacquer or other
adhered material is removed from internal bores. If in doubt, always fit new pipes.

7. Check that the coolant pipes of water cooled bearing housing applications and connectors are clean, free

from obstruction and will not leak under pressure.

8. To pre-lube the turbocharger bearings, pour some clean engine oil into the oil inlet and rotate the

turbocharger rotor assembly by hand.

9. Check that the exhaust manifold flange is flat and undamaged. Mount the turbocharger on the flange and

check that the turbine inlet gasket fits properly without obstructing the gas passages. Torque fasteners to
engine manufacturer's recommendation.

10. Assemble the air intake and boost outlet connections. Check that the connections are secure and will

not leak in use.

11. Check the exhaust system is fitted using the original mounting arrangement provided by the equipment

manufacturer. Always re-fit any supports/brackets back in position to ensure the system is correctly
supported.

12. Assemble the exhaust system to the turbine housing outlet. Check that the gasket/connection is secure

and will not leak in use.

13. Assemble any coolant pipes and check that the connections are secure, without obstruction and will not

leak in use.

14. Assemble the turbocharger oil inlet pipe and check that the connection is clean, secure and will not leak in

use.

15. Check all clamps and fasteners are correctly tightened to the torque recommended by the equipment

manufacturer.

16. Make the electrical connections between VG actuator motor, sensors and engine control module (ECM).

17. Make any ECM checks recommended by the engine manufacturer.

18. Crank the engine WITHOUT firing until engine oil flows out of the turbocharger drain flange.

19. Assemble the oil drain pipe and check that the connection is secure, without obstruction and will not leak in

use.

20. Start the engine and run at idle speed for approximately 1 minute so that the oil supply system is fully

operational.

21. Accelerate the engine and check that there are no leaks/obstructions of air/oil/coolant/gas under pressure.

22. Check that no hose or connection deforms under normal operation.

23. Before switching off the engine, leave it running at idle speed for at least 1 minute to cool the turbine.

Symbole - Deutsch

In diesem Handbuch werden die folgenden Symbole verwendet, die wesentliche Funktionen hervorheben. Die
Symbole haben folgende Bedeutung:

WARNUNG - Unterhaltungs und Wartungsverfahren müssen genau befolgt werden, da ein
Nichtbeachten zu Personenschäden oder tödlichen Verletzungen führt.

ACHTUNG - Falls Unterhaltungs und Wartungsverfahren nicht genau beachtet werden, kann der
Turbolader dadurch beschädigt oder zerstört werden.

AUSBAU bzw. ZERLEGEN.

EINBAU bzw. ZUSAMMENBAU.

INSRPEKTION erforderlich.

Teil oder Baugruppe REINIGEN.

DIMENSION - oder ZEITMESSUNG.

Teil oder Baugruppe ÖLEN.

WERKZEUGGRÖSSE wird angegeben.

ANZUG auf vorgeschriebenes Drehmoment erforderlich.

Sicherstellen, daß die AUSWUCHTMARKEN an der Rotor-Baugruppe richtig ausgerichtet sind.

Elektrische MESSUNG DURCHFÜRHREN.

Weitere Informationen an anderer Stelle bzw. in anderen Handbüchern.

Schutzkleidung muß immer getragen werden.

Deutet an, daß Teile schwer sein können.

Website-Verzeichnis mit Ihrem nächsten Holset-Händler.

Gehe zu Inhalt

HE341Ve Service Manual Introduction

Symbols

1:7

KG

HE341Ve Service Manual Introduction

1:8

Symbols - English

The following group of symbols have been used in this manual to help communicate the intent of the
instructions. When one of the symbols appears, it conveys the meaning defined below.

WARNING - Serious personal injury or extensive property damage can result if the warning
instructions are not followed.

CAUTION - Minor personal injury can result or a part, an assembly or the engine can be damaged if
the caution instructions are not followed.

Indicates a REMOVAL or DISASSEMBLY step.

Indicates an INSTALLATION or ASSEMBLY step.

INSPECTION is required.

CLEAN the part or assembly.

PERFORM a mechanical or time MEASUREMENT.

LUBRICATE the part or assembly.

Indicates that a WRENCH or TOOL SIZE will be given.

TIGHTEN to a specific torque.

Ensure that the BALANCE MARKS on the rotor assembly are in alignment

PERFORM an electrical MEASUREMENT.

Refer to another location in this manual or another publication for additional information.

Please wear protective clothing at all times.

Indicates components may be heavy.

Website access to find your nearest Holset Agent.

Go to contents

KG

Simbolos - Español

Los simbolos siguientes son usados en estes manual para clarificar el proceso de las instrucciones. Cuado
aparece uno de estos simbolos, su significado se espcifica en la parte inferior.

ADVERTENCIA – Procedimientos de Mantenimiento o Servicio que al no seguirse resultarán en
daños personales o pérdida de vida.

ATENCION – Procedimientos de Mantenimiento o Servicio que al no seguirse al pie de la letra,
resultarán en el daño o la destrucción del turbosobrealimentador.

Indica un paso de REMOCION o DESMONTAJE.

Indica un paso de INSTALACION o MONTAJE.

Se requiere INSPECCION.

LIMPIESE la pieza o el montaje.

Ejecutese una MEDICION mec·nica o del tiempo.

LUBRIQUESE la pieza o el montaje.

Indica que se dar· una LLAVE DE TUERCAS o el TAMA—O DE HERRAMIENTA.

APRIETESE hasta un par torsor especifico.

Ceriórese de que est·n alineadas las marcas de balance en el rotor.

EJECUTESE una MEDICION eléctrica.
Para información adicional refiérase a otro emplazamiento de este manual o a otra publicación

anterior.
Favor de siempre llevar ropa protectora.

Indica que los componentes pueden ser pesados.

Acceso a Sitio Web para localizar su agente Holset más cercano.

Ir a la tabla de materias

HE341Ve Service Manual Introduction

1:9

KG

Symboles - Français

Les symboles suivants sont utilisés dans ce manuel pour aider à communiquer le but des instructions. Quand
l’un de ces symboles apparait, il évoque le sens défini ci-dessous:

ATTENTION DANGER - Procédures de maintenance ou d’entretien qui, si elles ne pas observées
correctement, auront pour résultat des lésions corporelles ou un décès.

MISE EN GARDE - Procédures de maintenance ou d’entretien qui, si elles ne sont pas observées
strictement, auront pour résultat de causer des dégâts au turbocompresseur ou de conduire à sa
destruction.

Indique une opération de DEPOSE.
Indique une opération de MONTAGE.

L’INSPECTION est nécessaire.

NETTOYER la pièce ou l’ensemble.

EFFECTUER une MESURE mécanique ou de temps.

GRAISSER la pièce ou l’ensemble.

Indique qu’une DIMENSION DE CLE ou D’OUTIL sera donnée.

SERRER à un couple spécifique.

S’assurer que les repères d’équilibrage sur l’ensemble de rotor sont alignés.

EFFECTUER une MEASURE électrique.

Se reporter à un autre endroit dans ce manuel ou à une autre publication pour obtenir des
information plus complètes.

Il faut toujours mettre vêtements de protection.

Indique que les composants peuvent être lourds.

Accès au site Web pour trouver l’agent Holset le plus proche.

Aller au sommaire

HE341Ve Service Manual Introduction

1:10

KG

HE341Ve Service Manual Introduction

1:11

Símbolos - Português

Os símbolos a seguir serão utilizados neste manual para facilitar a comunicação das instruções e seue
significados estão déscritos abaixo.

ATENÇÃO - Os procedimentos de Manutenção ou Serviços que não forem seguidos correctamente
resultarão em ferimentos pessoais ou riscos de vida.

AVISO - Os procedimentos de Manutenção ou Serviço que não forem rigorosamente seguidos
resultarão em danos ou destruição do carregador turbo.

Indica um passe de DESMONTAGEM.

Indica um passo de MONTAGEM.

Requer inspeção.

LIMPE a peça ou conjunto.

Requer Medição mecãnica ou de tempo.

LUBRIFIQUE a peça ou o conjunto.

Indica necessidade de APERTO.

TORQUEAR de acordo com o especificado.

Assegure-se de que as MARCAS DE BALANCEAMENTO do conjunto eixorotor estejam alinhadas.

Requer medição ELÉTRICA.

Procure em outra seção deste manual ou em publicação par obter informações adicionais

Por favor, sempre utilize EPI (Equipamento de Protecao Individual)

Indica que os componentes podem estar pesados.

Visite o Website para encontrar o seu Agente Holset mais perto.

Vá para Conteúdo

KG

Turbocharger Identification

HE341Ve Service Manual Component Identification

2:1

Dataplate

HE341Ve

35XXXXX
XYYMMXXXXX

HE341Ve

Note

Dataplates may be fitted
to the DC motor of the
VG actuator (126) or to
the compressor housing
(8). The information from
the dataplate must be
quoted for service and
parts support.

HE341Ve Service Manual Component Identification

2:2

Installation Options

T ype A

HE341Ve Service Manual Component Identification

Exploded View - HE341Ve

2:3

67

151

46

112

120

53

27

126

120

154

105

115

105

115

114

113

153

106

105

105

Note

Exploded views represent a generic build standard. Parts may be added or subtracted in specific applications.

HE341Ve Service Manual Component Identification

Component List - HE341Ve

2:4

Item No. Description Quantity
121 VG Actuator Kit comprising: 1

126 VG Actuator 1

122 VG Actuator Fittings Kit comprising: 1

120 Screw, Cap Head 3
151 Coverplate, Actuator 1
46 Gasket, Coverplate 1
67 Bolt, Coverplate 4
154 Pivot Block 1

152 VG Position Sensor Kit comprising: 1

153 Position Sensor 1
106 Screw, Socket Head 2
105 Connector Male, Water 2

123 VG Bearing Housing Seals and Adapter Kit (Water & Oil) comprising: 1

053 Gasket, Oil Outlet 1
113 Adapter, Oil Inlet 1
114 O Ring Seal, Oil Inlet 1
105 Connector Male, Water 2
115 O Ring Seal, Water 2

124 Speed Sensor Kit comprising: 1

112 Speed Sensor 1
120 Screw, Cap Head 1
27 O Ring Seal 1

Note

Exploded views may not contain all listed components.

HE341Ve Service Manual Component Identification

Purchasable Service Tools

2:5

The following special tools can be purchased from your local Authorised Repair Location. The use of these
tools is recommended and where necessary they are shown in the appropriate service procedure.

Service Tools

Part No. Tool Description Tool Illustration

Caution

All Service and Maintenance settings are shown in Holset’s Service Data Sheet. It is essential that these
settings are used. Common tools found in mechanic’s tool box not included.

4027202

Wastegate Air Feed Adapter

4027203

Wastegate Air Feed Adapter

4027204

E-Clip Tool

3575186

Circlip Pliers

HE341Ve Service Manual Troubleshooting and Diagnosis

Fault Finding Chart- All Applications

Engine Lacks Power

Black Exhaust Smoke

Blue Exhaust Smoke

High Oil Consumption

Turbocharger Noisy

Engine Running Hot

Poor Transient Response

Smoke

Cyclic Sound from the Turbocharger

Oil Leak from Compressor Seal

Oil Leak from Turbine Seal

Dirty air cleaner

Clean or replace element according to manufacturer s recommendations

Restricted compressor intake duct

Remove restriction or replace damaged parts as required

Restricted air duct from compressor to intake manifold

Remove restriction or replace damaged parts as required

Restricted intake manifold

Refer to engine manufacturer s manual and remove restriction

Air leak in feed from air cleaner to compressor

Replace seals, gaskets or tighten fasteners as required

Air leak in feed from compressor to intake manifold

Replace seals, gaskets or tighten fasteners as required

Air leak between intake manifold and engine

Refer to engine manufacturer s manual and replace gaskets or tighten fasteners as required

Foreign object in exhaust manifold (from engine)

Refer to engine manufacturer s manual and remove obstruction

Restricted exhaust system

Remove restriction or replace damaged parts as required

Exhaust manifold cracked, gaskets blown or missing

Refer to engine manufacturer s manual and replace gaskets or damaged parts as required

Gas leak at turbine inlet/exhaust manifold joint

Replace gasket or tighten fasteners as required

Gas leak in ducting after turbine outlet

Refer to engine manufacturer s manual and repair leak

Restricted turbocharger oil drain line

Remove restriction or replace damaged parts as required

Restricted engine crankcase breather

Refer to engine manufacturer s manual, clear restriction

Turbocharger bearing housing sludged or coked

Change engine oil and oil filter, overhaul or replace turbocharger as required

Fuel injection pump or fuel injectors incorrectly set

Refer to engine manufacturer s manual and replace or adjust faulty components as required

Engine valve timing incorrect

Refer to engine manufacturer s manual for correct settings and adjust as required

Worn engine piston rings or liners

Refer to engine manufacturer s manual and repair as required

Burnt valves and/or pistons

Refer to engine manufacturer s manual and repair as required

Excessive dirt build up on compressor wheel and/or diffuser vanes

Clean in accordance with details in the appropriate Holset publication

Turbocharger damaged

Find and correct cause of failure, repair or replace turbocharger as necessary

3:1

HE341Ve Service Manual Troubleshooting and Diagnosis

3:2

Fault Finding Chart- Variable Geometry

Intermittent Low Power

Engine does not run Smoothly

Low Power at Low Engine Speed

Turbocharger Noisy

Poor Acceleration

Engine Lacks Power

Engine Overheats

Intermittent Engine Braking

Reduced Braking

Coolant Leak

Oil Leak

Engine will not Start

Note
Normal motor operation is almost silent, hence a check of actuator rod movement is

required to confirm lack of motor activity.

Actuator rod not moving

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. Check
actuator wiring for bad connections. Check motor and sensor pin resistances with
multimeter. Repair pin or wire damage by renewing connectors and leads. If no damage,
remove 4-bolt actuator coverplate to expose actuator rod end. Apply key-on calibration to
activate VG actuation sequence. If actuator rod travel is within range specified by service
manual, replace position sensor. If still no rod movement, remove actuator assembly and
reapply key-on calibration using equipment electrical supply. If rod does not move or if
endplay exceeds range specified by service manual under light load replace actuator. If
rod moves normally through specified travel, check ECM and, locking pliers (mole or vice
grips), ensure check cross shaft lever moves under light to medium force. If cross shaft
offers excessive or no resistance to movement replace turbocharger. If cross shaft motion
is acceptable and rod of reassembled actuator does not move, recheck ECM.

DC motor not driving

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. Check
actuator wiring for bad connections. Check motor pin resistance with multimeter. Repair
pin or wire damage by renewing connectors and leads. Remove 4-bolt actuator coverplate
to expose actuator rod end. If actuator rod travel is within range specified by service
manual, recheck ECM. If no rod movement, replace actuator. Refer to

‘actuator rod not

moving’

for further fault finding.

Actuator motor or gears noisy

If actuator operates with excessive motor or gear noise, replace actuator.

Position sensor fault indication

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. Ensure
sensor wiring for bad connections. Check sensor pin resistance with multimeter. Repair
pin or wire damage by renewing connectors and leads. If fault persists replace position
sensor. If new sensor still not working check ECM. Where position sensor malfunction
continues to affect engine operation, ECM will fully open VG nozzle to enable limp home
facility.

Position sensor nozzle open voltage outside range

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. Check
sensor wiring for bad connections. Check sensor pin resistance with multimeter. Repair
pin or wire damage by renewing connectors and leads. Remove 4-bolt actuator coverplate
to expose actuator rod end. Check cross shaft is not fouling on actuator body screws.
Remove actuator and apply light axial load to rod to check endplay. If greater than
specified in service manual replace actuator. Refer to

‘position sensor voltage span

outside range’

for further fault finding. Where position sensor malfunction continues to

affect engine operation, ECM will fully open VG nozzle to enable limp home facility

Position sensor nozzle closed voltage outside range

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. Check
sensor wiring for bad connections. Check sensor pin resistance with multimeter. Repair
pin or wire damage by renewing connectors and leads. Remove 4-bolt actuator coverplate
to expose actuator rod end. Check cross shaft is not fouling on actuator body screws.
Remove actuator and apply light axial load to rod to check endplay. If greater than
specified in service manual replace actuator. Refer to

‘position sensor voltage span

outside range’

for further fault finding. Where position sensor malfunction continues to

affect engine operation, ECM will fully open VG nozzle to enable limp home facility.

Position sensor voltage span outside range

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. Check
sensor wiring for bad connections. Check sensor pin resistance with multimeter. Repair
pin or wire damage by renewing connectors and leads. Remove 4-bolt actuator coverplate
to expose actuator rod end. Ensure stroke of assembled actuator is within range specified
by service manual. If in range, check position sensor and ECM. If outside range, remove
actuator. Using light to medium load and locking pliers, check linear travel of cross shaft
pin is within same range specified for assembled actuator. If pin motion is
not in range replace turbocharger. If pin motion is in range, recheck stroke of actuator rod.
If less than specified by service manual, replace actuator. If turbocharger stroke and
actuator stroke are both in range, then check ECM. Where position sensor malfunction
continues to affect engine operation, ECM will fully open VG nozzle to enable limp home
facility.

HE341Ve Service Manual Troubleshooting and Diagnosis

3:3

Fault Finding Chart- Variable Geometry

Intermittent Low Power

Engine does not run Smoothly

Low Power at Low Engine Speed

Turbocharger Noisy

Poor Acceleration

Engine Lacks Power

Engine Overheats

Intermittent Engine Braking

Reduced Braking

Coolant Leak

Oil Leak

Variable geometry nozzle movement slow or inconsistent

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. Check
actuator wiring for bad connections. Repair pin or wire damage by renewing connectors
and leads. If no damage, remove 4-bolt actuator coverplate to expose actuator rod end.
Apply separate voltage to motor using service test equipment. Fully retract rod end using
voltage toggle switch. Drive actuator through full cycle using toggle switch and measure
cycle time. If time is within specification, replace position sensor. If nozzle movement
remains slow or inconsistent, remove actuator assembly and, locking pliers, ensure cross
shaft lever moves under light to medium force. If cross shaft offers excessive resistance
to movement replace turbocharger. If cross shaft motion is acceptable, reapply separate
voltage to motor. If rod shows signs of stiction, replace actuator. If rod of new assembled
actuator still suspect, recheck ECM. Where position sensor malfunction continues to
affect engine operation, ECM will fully open VG nozzle to enable limp home facility.

VG mechanism intermittent jamming

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. Check
actuator wiring for bad connections. Repair pin or wire damage by renewing connectors
and leads. If no damage, remove 4-bolt actuator coverplate to expose actuator rod end.
Apply separate voltage to motor using service test equipment. If actuator travels within
range specified by service manual, fully retract rod end using voltage toggle switch. Drive
actuator through full cycle using toggle switch and measure cycle time. If time is within
specification, replace position sensor. If actuator movement remains slow or inconsistent,
remove actuator assembly and, using locking pliers, ensure cross shaft lever moves
under light to medium force. If cross shaft offers excessive resistance to movement
replace turbocharger. If cross shaft motion is acceptable, reapply separate voltage to
motor of replacement actuator using service tool. If rod of new assembled actuator still
slow or inconsistent, then, recheck ECM. Where position sensor malfunction continues to
affect engine operation, ECM will fully open VG nozzle to enable limp home facility.

Pivot block seized on cross shaft pin

Refer to ECM diagnostics for possible fault code data. To avoid feedback error to ECM
always disconnect and reconnect actuator motor and position sensor in correct sequence.
Disconnect motor before position sensor. Reconnect position sensor before motor. If
actuator rod travel restricted, ensure pivot block moves freely on cross shaft pin. If no
axial or rotary movement or if force required to move block, then replace turbocharger.

No speed signal

Refer to ECM diagnostics for possible fault code data. Check sensor connections. If pin
resistance measurement is incorrect replace sensor. Where sensor may have been
overheated check ECM diagnostic fault codes and if necessary replace sensor.

Intermittent or noisy speed signal

Refer to ECM diagnostics for possible fault code data. Check sensor with multimeter. If
either resistance measurement is incorrect replace sensor. Where sensor may have been
overheated check ECM diagnostic fault codes and if necessary replace sensor.

No boost pressure signal (P2)

If the ECM diagnoses a boost pressure signal error refer to engine manual.

No air inlet temperature signal (T2)

If the ECM diagnoses an air inlet temperature signal error refer to engine manual.

Engine will not Start

HE341Ve Service Manual Troubleshooting and Diagnosis

Fault Finding Chart- Variable Geometry

3:4

Intermittent Low Power

Engine does not run Smoothly

Low Power at Low Engine Speed

Turbocharger Noisy

Poor Acceleration

Engine Lacks Power

Engine Overheats

Intermittent Engine Braking

Reduced Braking

Coolant Leak

Oil Leak

Actuator coolant circuit restricted

Check coolant pipework and connections for damage. Replace damaged fittings using
genuine replacement parts. Refer to engine manual for flow data and service instructions.
If coolant flow remains restricted replace actuator.

Actuator coolant pipework or connectors leaking

Replace damaged pipes and tighten connectors to torque specified in engine service
instructions. If leak persists replace damaged actuator fittings using genuine replacement
parts and torque to specification. If leak persists, replace actuator.

Actuator coolant joint leaking

If coolant leaks from 5-bolt actuator mechanism coverplate joint, replace actuator. Never
remove 5-bolt coverplate as this will adversely affect actuator clearance conditions.

Coolant ingress into actuator bracket cavity

Replace actuator

Oil ingress into actuator bracket cavity

Replace turbocharger

Air leakage from speed sensor

Check o ring seal and replace if necessary. Refit sensor and torque fastener to value in
service manual. If leak persists replace sensor. If leak continues replace turbocharger.

Bearing Housing coolant circuit restricted

Check coolant pipework and connections for damage. Replace damaged fittings using
genuine replacement parts. Refer to engine manual for flow data and service instructions.
If coolant flow remains restricted replace turbocharger

Bearing housing coolant pipework or connectors leaking

Replace damaged pipes and tighten connectors to torque specified in engine service
instructions. If leak persists replace damaged fittings using genuine replacement parts
and torque to specification. If leak persists, replace turbocharger.

Bearing housing oil feed and return lines leaking

Replace damaged pipes. Check o ring seals and gaskets. Replace if necessary. Tighten
connectors to torque specified in engine service instructions. If leak persists replace
damaged fittings using genuine replacement parts and torque to specification. If leak
persists, replace turbocharger.

Engine will not Start

Dial Gauge and Dial Gauge Adapter

-0+
10

10

20

20

30

30

40

40

50

MERCER

TYPE 20

Steel Rule

Vernier Caliper

Allen Key

Stopwatch

60

5

10

15

20

25

30

35

40

45

50

55

HE341Ve Service Manual Component Testing and Replacement

Service Tools

4:1

The following special tools are recommended to perform procedures in this manual. The use of these tools is
shown in the appropriate procedure.

Part No. Tool Description Tool Illustration

Torque Wrench

Caution

All Service and Maintenance settings are shown in Holset’s Service Data Sheet. It is essential that these
settings are used. Common tools found in mechanic’s tool box not included.

HE341Ve Service Manual Component Testing and Replacement

Service Tools

4:2

The following special tools are recommended to perform procedures in this manual. The use of these tools is
shown in the appropriate procedure. These tools can be purchased from your local Authorised Repair Location.

Part No. Tool Description Tool Illustration

Vehicle Battery Supply

Service Test Equipment

Multi-meter

Caution

All Service and Maintenance settings are shown in Holset’s Service Data Sheet. It is essential that these
settings are used. Common tools found in mechanic’s tool box not included.

Oil Leakage

M12 x 1.5

Replacement seals and adapters should be fitted
without sealant as this can contaminate the oil. Torque
tighten adapter to value specified by engine
manufacturer.

It is important to avoid kinked or worn pipes during
servicing and subsequent operation.

HE341Ve Service Manual Component Testing and Replacement

On Engine Checks

4:3

M8 x 1.25

Replacement gaskets should be fitted without sealant
as this can contaminate the oil. Torque tighten flange
fasteners to value specified by engine manufacturer.

All outlet pipes should be free flowing without kinks and
sharp bends and decline at an overall angle not less
than 30 degrees below the horizontal.

M6 x 1.0 (8 mm)
The variable geometry (VG) cross shaft is sealed

against oil leakage by a spring backed oil seal.
Leakage can be detected by removing the 4-bolt
actuator coverplate. If leak is detected, remove and
replace turbocharger.

Warning

The oil inlet is pressurized and no service action
should be taken with the engine running.

Warning

Outlet oil is hot and no service action should be taken
with the engine running.

Coolant Leakage

M16 x 1.5
Repair bearing housing coolant leaks by refitting /

replacing inlet and outlet adapters. Torque tighten
adapters to value specified by engine manufacturerer.

Where housing threads are damaged replace
turbocharger.

Caution

Seals must be replaced using specialised equipment.
Do not attempt to replace in service.

Variable geometry turbochargers have potential oil, gas, coolant and air leak paths. They are fitted with
sensors and an actuator which contain sensitive components. When checking and correcting leaks it
is essential that good practice and the correct tools are used to avoid damaging the turbocharger.
Bearing housing seals and adapter kits (123) are available.

Caution

Do not use sealant as this may affect performance of
o-ring seals.

Visual Checks

Make visual check for damaged or bent blades.
Replace turbocharger if damaged or bent.

HE341Ve Service Manual Component Testing and Replacement

4:4

Make visual check for damaged and fouling of impeller
blades. Replace turbocharger if damaged or bent.

M10 x 1.0 (16 mm)
Repair actuator coolant leakage by re-fitting

replacement of coolant inlet and outlet adapters. Torque
tighten adapters to value specified by engine
manufacturerer.

Where actuator threads are damaged replace actuator
by reference to VG Actuator Replacement.

Air Leakage

M6 x 1.0 (8 mm)

Check for air leaks from the speed sensor. Where
leakage occurs replace o-ring and torque tighten new
cap head screw to value specified in

Service Data Sheet. Speed sensor service kit (124) is

available.

Caution

Visual and audible checks for air leaks may be
completed safely with a running engine.

Caution

Always use new cap head screw. Ensure thread in
compressor housing is clean and oil free before
torque tightening.

Caution

Do not remove turbine housing as this may damage
variable geometry control mechanism.

Caution

Never attempt to straighten blades.

Caution

Do not remove compressor cover as this may damage
variable geometry control mechanism.

Caution

Never attempt to straighten blades.

Caution

Ensure new actuator coolant adapters are fitted with
o ring and washer prior to insertion.

Check speed sensor, position sensor and actuator
wiring and connectors for damage and bad
connections. Remake connections and if fault persists
repair wiring by replacement.

M6 x 1.0 (8 mm)
Where it is not possible to remove 4-bolt actuator

coverplate on engine due to space claim constraints, it
might be possible to hear actuator movement.

Apply key-on calibration to activate VG actuation
sequence. As actuator motor operates correctly with
low electrical hum, no noise does not necessarily imply
no actuation. However, high noise may indicate an
actuator problem In this case, refer to

Actuator Check and Removal and
Actuator Replacement.

HE341Ve Service Manual Component Testing and Replacement

4:5

On Engine Actuation Checks

The Engine Control Module (ECM) features a key-on
calibration check to monitor the health of the VG
actuation system. It will potentially detect faults in:

• Position sensing

• VG actuation

• Speed sensing

It may be possible to verify a key-on calibration error
using on-engine visual checks.

Turbocharger Speed

Exhaust Outlet Pressure

Actuator Position

Actuator Control Signal

Engine Control Module (ECM)

Engine Speed

Throttle Demand

Exhaust Manifold Pressure

Inlet Manifold

Pressure & Temperature

Contains pre-set data on

airflow requirements for

any fuel quantity injected

at any engine speed,

with built-in safety

features for excessive

boost, smoke or

turbocharger speed.

Fuel Injection Pump Information

Ambient Pressure and Temperature

With intake system disconnected from compressor
housing, it may be possible to check for excess bearing
axial and radial clearances.

If light finger pressure causes contact between
compressor or turbine wheel and respective housing
replace turbocharger.

If in doubt, the turbocharger must be removed from
engine to check bearing clearance against
recommended values shown in Service Data Sheet.
Replace turbocharger where service limits are
exceeded.

Warning

Always wear safety glasses.

Caution

To avoid feedback error to ECM always disconnect
motor before position sensor. Reconnect position
sensor before motor.

Note

Always refer to ECM diagnostics for possible
actuation fault data.

HE341Ve Service Manual Component Testing and Replacement

4:6

If actuator rod travel is within permissible range shown
in Service Data Sheet check pivot block is free to
rotate and move axially on cross shaft pin.

If pivot block is seized or if force is required to move
pivot block on pin remove block and check pin for
damage. Replace turbocharger if damaged.

If pivot block is loose on pin refer to

Actuator Check and Removal to check pin and pivot

block hole diameters.

If pivot block rotates freely, remove pivot block and
check linear travel of VG cross shaft pin is within
permissible range shown in Service Data Sheet.

If pin shows no resistance to motion or does not travel
within permissible range replace turbocharger. If pin
travels within permissible range replace actuator by
refering to Actuator Replacement.

If VG mechanism does not move or if travel is outside
permissible range shown in Service Data Sheet
remove actuator by reference to

Actuator Check and Removal.

If on-engine actuator removal is possible use
equipment electrical system and key on calibration
sequence to check rod travel of remote actuator is
within permissible range. If outside range replace
actuator by refering to Actuator Replacement.

2010 30

Apply key-on calibration sequence to actuator motor
and use steel rule to measure travel.

If VG mechanism travel is within permissible range
shown in Service Data Sheet there may be a position
sensor fault. In this case, refer to

Position Sensor Check and Removal.

2010 30

Note

Always check VG cross shaft movement prior to
refitting or replacing actuator.

Caution

Always check pivot block for wear and refit to cross
shaft pin before refitting actuator.

Warning

Key-on calibration sequence automatically
extends/retracts actuator over its full travel. Keep
fingers away from rod.

Caution

Detached actuator stroke is greater than stroke when
attached to VG nozzle. Ensure correct range is read
from Service Data Sheet.

Caution

Use moderate hand force only to rotate cross shaft.

M6 x 1 (8 mm)
Where ECM indicates a speed sensor fault and no

wiring or connector problems are found refer to

Speed Sensor Check and Removal for further health

checks.
Replace sensor by refering to

Speed Sensor Replacement.

HE341Ve Service Manual Component Testing and Replacement

4:7

Caution

Never remove actuator mechanism 5-bolt cover plate
as this will adversely effect actuator clearance
conditions.

Secure the turbine housing and check the axial
clearance at compressor impeller nose using a dial
gauge.

Ensure clearance is within MIN/MAX values shown on

Service Data Sheet.

If axial clearance does not meet specification replace
the turbocharger.

HE341Ve Service Manual Component Testing and Replacement

Bearing Clearance

4:8

Check the radial movement at compressor impeller
nose using a dial gauge.

Ensure movement is within MIN/MAX TIR (Total
Indicator Reading) values shown on

Service Data Sheet.

If radial movement does not meet specification replace
the turbocharger.

Where space claim allows, position sensor checks and
removal should be done on engine. If this is not
possible, remove actuator by reference to

Actuator Check and Removal.

If actuator removal is not possible, remove turbocharger
from engine.

HE341Ve Service Manual Component Testing and Replacement

Position Sensor Check and Removal

4:9

Where key-on calibration or

On Engine Actuation Checks have indicated a

position sensor fault, final confirmatory checks are
recommended.

Turbocharger Speed

Exhaust Outlet Pressure

Actuator Position

Actuator Control Signal

Engine Control Module (ECM)

Engine Speed

Throttle Demand

Exhaust Manifold Pressure

Inlet Manifold

Pressure & Temperature

Contains pre-set data on

airflow requirements for

any fuel quantity injected

at any engine speed,

with built-in safety

features for excessive

boost, smoke or

turbocharger speed.

Fuel Injection Pump Information

Ambient Pressure and Temperature

Ensure electrical integrity of sensor wiring and
connectors.

Disconnect the sensor at its electrical connector. Using
a multi-meter, check the resistance between connector
pins 1 and 3 is 800 / 1200 ohms with the sensor at
20°C.

Apply key-on calibration check and measure voltage
from position sensor pin 1 to pin 3 is in the range
1 to 5 volts dc.

1 2 3

M6 x 1.0 (8 mm)
Remove 4-bolt actuator coverplate and gasket to

expose actuator rod end.

Note

Always refer to ECM diagnostics for possible
actuation fault data.

Warning

Key-on calibration sequence automatically
extends/retracts actuator over its full travel. Keep
fingers away from rod.

Warning

Always wear safety glasses.

Caution

To avoid feedback error to ECM always disconnect
motor before position sensor. Reconnect position
sensor before motor.

M4 x 0.7 (3 mm)

Where an electrical fault is diagnosed or correct
actuation is confirmed, use a socket wrench and rachet
to loosen and remove 2 socket head screws.

HE341Ve Service Manual Component Testing and Replacement

4:10

Extract the position sensor and refer to

Position Sensor Replacement.

Apply system voltage to fitted or remote actuator motor
through on/off switch. Confirm travel is within
permissible range shown in Service Data Sheet.

2010

Warning

Always wear safety glasses.

Caution

Breaking the sealed fastener joints may require
significant torque. It is essential that the socket
wrench is properly engaged to avoid inadvertent
damage to connector resulting from spanner slip.

Warning

Keep fingers away from rod during actuation
sequence.

The sensor flange features a mechanical baulk (tab) to
ensure correct sensor orientation.

First ensure o ring seal is greased and in position.
Engage sensor on to flatted shaft then locate flange
baulk into housing face location.

HE341Ve Service Manual Component Testing and Replacement

Position Sensor Replacement

4:11

4 mm X 0.7 (3mm)
New socket head screws are provided in position

sensor service kit (152). These have patch sealant
feature and must be fitted dry.

Torque tighten to value shown in Service Data Sheet.

Caution

It is not recommended to use the original fasteners
when re-fitting an original or new position sensor.

Position sensor kits (152) are available.

Ensure clamped surfaces are clean prior to inserting
position sensor.

Warning

Always wear safety glasses.

Caution

Where an original fastener must be used, it is
important that the threads are clean and thread
locking compound is applied to achieve a vibration
proof connection. Fastener torque must be applied
within the time allowed by the sealant manufacturer.

Caution

To avoid feedback error to ECM always disconnect
motor before position sensor. Reconnect position
sensor before motor.

The Engine Control Module (ECM) features a key-on
calibration check of the VG actuation system. When
combined with electro-mechanical checks, it will
potentially detect faults in:

• VG mechanism

• VG actuator

• Position sensor

Turbocharger Speed

Exhaust Outlet Pressure

Actuator Position

Actuator Control Signal

Engine Control Module (ECM)

Engine Speed

Throttle Demand

Exhaust Manifold Pressure

Inlet Manifold

Pressure & Temperature

Contains pre-set data on

airflow requirements for

any fuel quantity injected

at any engine speed,

with built-in safety

features for excessive

boost, smoke or

turbocharger speed.

Fuel Injection Pump Information

Ambient Pressure and Temperature

HE341Ve Service Manual Component Testing and Replacement

Actuator Check and Removal

4:12

Where key-on calibration or

On Engine Actuation Checks have indicated an

actuation fault, confirmatory electromechanical checks
are recommended.

Ensure electrical integrity of actuator motor wiring and
connectors.

Disconnect the DC motor at its electrical connector.
Using a multi-meter, check the resistance between
connector pins 1 and 2 is 0.25 / 1.25 ohms.

If resistance is outside range replace actuator by
refering to Actuator Replacement.

M6 x 1.0 (8 mm)
If resistance is within range remove 4 bolt actuator

coverplate and gasket to expose actuator rod end.

Caution

Actuator checks should be carried out on engine. If
actuator or turbocharger removal is necessary, engine
systems are disrupted:

• Water system drained

• Position sensor disconnected

• Speed sensor disconnected

• Oil circuit disassembled

Note

Always refer to ECM diagnostics for possible
actuation fault data.

Warning

Always wear safety glasses.

Caution

Never remove actuator mechanism 5-bolt cover plate
as this will adversely effect actuator clearance
conditions.

Caution

To avoid feedback error to ECM always disconnect
motor before position sensor. Reconnect position
sensor before motor.

Note

Where it is not possible to remove actuator coverplate
on engine remove turbocharger from engine in
accordance with engine service manual.

Carefully slide actuator rod from slot location with pivot
block.

HE341Ve Service Manual Component Testing and Replacement

4:13

Remove actuator.

Apply system voltage to actuator motor through on/off
switch. If actuator travel is outside range shown in

Service Data Sheet, remove actuator.

2010

Actuator Removal

M8 x 1.25 (10 mm)
Where it is not possible to remove actuator coverplate

on engine remove turbocharger from engine in
accordance with engine service manua.l.

4 bolt coverplate and gasket removal provides access
to 3 actuator caphead fasteners. Use socket wrench
and ratchet to loosen and extract screws whilst holding
actuator in position.

Warning

Keep fingers away from rod during on/off actuating
sequence.

Warning

Always wear safety glasses.

Warning

Do not use actuator motor as a lifting handle
particularly when actuator is assembled to
turbocharger.

Note

With actuator removed it is logical to carry out

VG mechanism check before continuing with

actuator diagnostic.

If pin travel within range, check pivot block bore and
crankpin diameter.

If pivot block bore is greater than 6.04 mm (0.238 in)
replace pivot block.

If crankpin diameter is less than 5.99 mm (0.236 in)
replace turbocharger.

HE341Ve Service Manual Component Testing and Replacement

VG Mechanism Check

4:14

With actuator removed it is possible to check that pivot
block if free to rotate and move axially on cross shaft
crankpin.

If pivot block is seized or if force is required to move
pivot block on crankpin, replace turbocharger.

If pivot block rotates freely, remove pivot block and
check linear travel of VG cross shaft pin is within
permissible range shown in Service Data Sheet.

If pin shows no resistance to motion, does not travel
within permissible range replace turbocharger.

Caution

Use moderate hand force only to rotate cross shaft

Apply system voltage to actuator motor through on/off
switch. Switch voltage to retract and extend actuator
rod. Check actuation cycle can be completed in 5
seconds.

HE341Ve Service Manual Component Testing and Replacement

Remote Actuator Check

4:15

If any of three test results are outside specified value
replace actuator by refering to Actuator Replacement.

Disconnect electrical supply. Check actuator rod
backlash is less than the value shown in the

Service Data Sheet.

Apply system voltage to actuator motor.
Use a steel rule to check actuator travel is within

permissible range shown in Service Data Sheet.

Note

Always refer to ECM diagnostics for possible
actuation fault data.

Caution

Detached actuator stroke is greater than stroke when
attached to VG cross shaft. Ensure correct range is
read from Service Data Sheet.

Caution

To avoid feedback error to ECM always disconnect
motor before position sensor. Reconnect position
sensor before motor.

Warning

Keep fingers away from rod during actuation
sequence.

HE341Ve Service Manual Component Testing and Replacement

Actuator Replacement

4:16

Assemble three fasteners loosely in sequence.

1

2

3

Actuator service kits are available (121).
Used actuators may be refitted depending on ECM fault

diagnostics and confirmatory turbocharger
investigations using the processes set out in this
Service Manual.

Actuator fitting kit (122) is recommended when refitting
used actuator.

Ensure actuator fasteners and tapped holes in bearing
housing are clean and dry before inserting fasteners.

Warning

Always wear safety glasses.

Apply high temperature grease (eg Molycote) to cross
shaft pin.

Position pivot block on pin ensuring it is in line with
crank arm.

Ensure actuator rod is in mid travel. This assists with
insertion of pivot block through aperture in actuator
mounting face and location into mating slot in actuator
rod.

Caution

It is not recommended to use the original fasteners
when re-fitting an original or new actuator.

Caution

Where an original fastener must be used, it is
important that the threads are clean and thread­locking compound is applied to achieve a vibration
proof connection. Fastener torque must be applied
within the time allowed by the sealant manufacturers.

Note

Always check VG cross shaft movement prior to
refitting or replacing actuator.

Caution

Ensure cross shaft pin, grease applicator and pivot
block bore are clean.

Warning

Always wear safety glasses.

Use a calibrated torque wrench to tighten three screws
in sequence to value specified in Service Data Sheet.

1

2

3

HE341Ve Service Manual Component Testing and Replacement

4:17

At this stage, prior to fitting coverplate. It is possible to
verify correct actuator movement.

Apply system voltage to actuator motor through on/off
switch. Check rod end travel is within range shown in

Service Data Sheet.

2010 30

M6 X 1.0 (8 mm)
Sub-assemble 4-bolt coverplate and gasket using the

push fit of the cap head screws in the gasket.

Using a calibrated torque wrench, torque tighten the 4
cap head screws to the value shown in the

Service Data Sheet.

Caution

The torquing sequence is important to prevent road
spray ingress.

Warning

Always wear safety glasses.

Caution

To avoid feedback error to ECM always disconnect
Motor before position sensor. Reconnect position
sensor before motor.

Ensure rotor assembly freely rotates prior to engine
mounting.

HE341Ve Service Manual Component Testing and Replacement

4:18

Caution

Ensure dataplate label is transferred from old to new
actuator to maintain record of essential turbocharger
information.

Where the ECM signals a speed signal error, check the
connection to the engine wiring harness is good. If error
persists change speed sensor.

HE341Ve Service Manual Component Testing and Replacement

Speed Sensor Check and Removal

4:19

M6 x 1.0 (8 mm)
Using the socket wrench and ratchet, loosen and

remove the cap head screw, speed sensor.

Extract the speed sensor ensuring that the o-ring seal
is removed with the sensor. This is conveniently
achieved by tilting the sensor as it exits its recessed
bore.

Place the speed sensor on a clean surface to avoid
collection of unwanted ferrous particles.

Where road spray, dirt and fluid ingress has caused
fouling or corrosion of the speed sensor fastener apply
a penetrating oil in accordance with the manufacturer’s
instructions.

Warning

Always wear safety glasses during disassembly.

Caution

Breaking the sealed fastener joint may require
significant torque. It is essential that the socket
spanner is properly engaged on the fastener to avoid
inadvertent damage to speed sensor cable and
connector resulting from a spanner slip.

Caution

The speed sensor connector contains electronic
components. Multimeter or other electrical tests can
damage the sensor.

Speed sensor kits (124) are available.

Prior to inserting speed sensor ensure it is clean and
unable to collect magnetic particles as it is inserted.
Ensure the o-ring seal is in position on the sensor body.

The o-ring moves automatically into its fitted position
during insertion.

HE341Ve Service Manual Component Testing and Replacement

Speed Sensor Replacement

4:20

M6 x 1.0 (8 mm)
Use new cap head screw with patch sealant feature

provided in service kit (124) to fasten speed sensor
flange to bearing housing.

Torque tighten to the value specified in

Service Data Sheet.

Warning

Always wear safety glasses during disassembly.

Caution

Where an original fastener must be used, it is
important that the threads are clean and thread
locking compound is applied to achieve a vibration
proof connection. Fastener torque must be applied
within the time allowed by the sealant manufacture.

Caution

It is not recommended to use the original fastener
when re-fitting an original or new speed sensor.

Holset HE341Ve

Service Manual

Cummins Turbo Technologies Ltd.
Aftermarket Division
Croset Avenue
Huddersfield
West Yorkshire
HD1 6SE

www.holsetaftermarket.com

Copyright 2007, Cummins Turbo Technologies Ltd. All rights reserved.
VGT, Command Valve and Super MWE are trade marks of Cummins Turbo Technologies Ltd.
Holset and the Holset Logo are registered trade marks of Cummins Turbo Technologies Ltd.
Cummins and the Cummins logo are registered trade marks of Cummins Inc.

Part No. 4029631 Rev. 01 Ref. JV/KD Effect date 01.03