HX30/32/35/40W

turbochargers Service Repair Manual

Ref. JV/PF Effect Date: 12:01

Copyright® 2001 Part No. 4029610 Rev. 00

Holset Engineering Co. Ltd. Effect date 12.01
All rights reserved
HX30/32/35/40W Service Repair Manual Foreword

Foreword
This publication was written to assist with installation, maintenance and overhaul of the Holset
HX30/32/35/40W range of turbochargers. It is not a warranty of any kind expressed or implied.

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.
HX30/32/35/40W Service Repair 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 Turbocharger Matching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:2
Notes, Cautions and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:3
Installation Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:4
Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:5
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:6
2: Component Identification
Turbocharger Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:1
Dataplate and CHRA (Core) of Turbocharger. . . . . . . . . . . . . . . . . . . . . . . . . 2:1
Installation Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:2
Exploded Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:4
Component List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:7
Purchasable Service Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:9
3: Troubleshooting and Diagnosis
Fault Finding Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3:1
4: Component Testing and Replacement
Service Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:1
On Engine Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:2
Bearing Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:6
Turbine and Compressor Housings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:7
Cleaning of Housings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:15
Wastegate Actuator Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:17
Actuator Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:18
Actuator Bracket Removal and Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . 4:19
Wastegate Mechanism Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:20
Actuator Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4:22
5: Turbocharger Service and Overhaul
Service Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5:1
Compressor Wheel Locknut Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5:2
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5:3
Component Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5:7
Inspection and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5:9
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5:15
6: Service Data Sheets
HX Range Service Data Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6:1
HX30/32/35/40W Service Repair Manual Introduction

About the Manual

The procedures in this manual were developed to instruct in the correct overhaul of the Holset
HX30/32/35/40W 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.

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 wastegate
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.

1:1
HX30/32/35/40W Service Repair Manual Introduction

Description and Operation of Turbocharger

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 Wastegate Turbochargers

The need for wastegated turbochargers
A standard turbocharger can be perfectly matched to only one particular engine condition, eg maximum torque
speed or maximum load speed. At this engine speed, the turbocharger supplies the optimum mass of air to
give the required air/fuel ratio. At other speeds the air/fuel ratio cannot be held at the optimum hence fuel
consumption and emission levels worsen.

Engine emission legislations have forced manufacturers to improve their engine efficiencies, particularly at low
speeds where low air/fuel ratios cause high smoke levels.

The Holset integral wastegate turbocharger is a cost effective solution to this problem and for a small increase
in complexity, a simple variable flow turbine housing has been achieved.

Integral wastegate turbochargers have been available for passenger cars for many years. Holset has developed
such a turbocharger with components designed for extended life equal to that of standard commercial vehicle
turbochargers.

The importance of correctly servicing the wastegate actuator mechanism

A wastegate turbocharger requires accurate setting at point of manufacture. It is very important to adhere
to setting limits when servicing the turbocharger, as failure to do so could result in turbocharger or engine
failure.

Effects of wrong setting

Possible consequences if turbocharger boost pressure is too low:-
• Engine runs fuel rich • Fuel consumption increase
• Exhaust temperature increase • Smoke levels increase
• Hydrocarbon levels increase • Risks of failing emissions tests
• High cylinder temperature risks
damage to engine pistons

Possible consequences if turbocharger boost pressure is too high:-

• Engine runs fuel weak (lean) • Nitrous oxide levels increase
• Excessive boost overspeeds • Turbocharger bearing failure and
turbocharger wheel fatigue problems
• Increased cylinder pressure risks damage • Intercooler load increases causing engine
to engine head gasket, pistons and valves to overheat, risking piston damage

1:2
HX30/32/35/40W Service Repair Manual Introduction

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

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

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.

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 HX30/32/35/40W range
of turbochargers weighs up to 15 kg (33 lb) and is fitted with external parts that are sensitive to manual
handling.

Caution
This turbocharger may have been manufactured using the ‘core balance’ process and therefore MUST be
check balanced on rebuild.
A core balanced turbocharger will not have any co-relation marks. If you intend to overhaul/repair a core
balanced turbocharger, and do not have access to a core balancing machine, we recommend that you make
your own rotor co-relation marks during disassembly so that these parts can be reassembled in the same
relative positions.
Balance limits for turbocharger rebuild are shown on Holset’s Service Data Sheet.
It is important to note that operating a turbocharger with a rotor or core balance level greater than the
published limits could cause turbocharger or engine failure. If you are in any doubt regarding the balancing
process, please contact an approved Holset agent for assistance.

Caution
Never remove the wastegate actuator or mounting bracket from the turbine housing, unless the actuator is to
be renewed. It is possible to leave the turbine housing, bracket and actuator as an assembly while servicing
the turbocharger.
Never adjust the link-rod of an assembled wastegate turbocharger. The link-rods are set by the O.E. supplier
to precise limits which must be adhered to.
Always check that the actuator and wastegate mechanism is still in good working order, before proceding with
disassembly of your wastegate turbocharger.

Warning
Some parts are manufactured in Viton that requires special treatment during repair and service after fire.

1:3
HX30/32/35/40W Service Repair Manual Introduction

Installation Data
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 wholelife
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/in2).
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/in2).
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. 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/in2) but 1.4 kPa (0.20 lbf/in2) can be accepted by reference to Holset.
12. Oil pressure of 150 kPa (20 lbf/in2) must show at the oil inlet within 3 - 4 seconds of engine firing to
prevent damage to turbocharger bearing system. A flexible supply pipe is recommended.
13. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in2). Maximum
permissible 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/in2).
14. Recommended oil flows for the turbochargers are 2 litre/min at idle and 3 litre/min above maximum
torque speed.
15. Do not use liquid gasket substances or thread sealant as any excess can enter the turbocharger oil
system to obstruct flow.
16. Recommended coolant flows for the turbochargers are 2 litre/min at idle and 7 - 10 litre/min above
maximum torque speed.
Note:
100 kPa = 1 bar (14.5037 lbf/in2 =psi).

1:4
HX30/32/35/40W Service Repair Manual Introduction

Installation Checklist
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.
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.
10. Assemble the air intake and boost outlet connections. Check that the connections are well made 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 well made
and will not leak in use.
13. Assemble any coolant pipes and check that the connections are well made, without obstruction and will
not leak in use.
14. Assemble the turbocharger oil inlet pipe and check that the connection is clean, well made and will not
leak in use.
15. Check all clamps and fasteners are correctly tightened to the torque recommended by the equipment
manufacturer.
16. Connect the air pipe from the compressor housing/inlet manifold to the wastegate actuator ensuring the
pipe bore is clean and dry before fitment.
17. Make any ECU 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 well made, 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.

1:5
HX30/32/35/40W Service Repair Manual Introduction

Symbols
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.

KG

Website-Verzeichnis mit Ihrem nächsten Holset-Händler.

Gehe zu Inhalt

1:6
HX30/32/35/40W Service Repair Manual Introduction

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.

KG

Website access to find your nearest Holset Agent.

Go to contents

1:7
HX30/32/35/40W Service Repair Manual Introduction

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.

KG
Indica que los componentes pueden ser pesados.

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

Ir a la tabla de materias

1:8
HX30/32/35/40W Service Repair Manual Introduction

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.

KG Indique que les composants peuvent être lourds.

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

Aller au sommaire

1:9
HX30/32/35/40W Service Repair Manual Introduction

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.

KG

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

Vá para Conteúdo

1:10
HX30/32/35/40W Service Repair Manual Component Identification

Turbocharger Identification
Dataplate
35XXXXX
XYYMMXXXXX

HX30W
Note
Dataplates will be fitted to the compressor housing
(8). The information from the dataplate must be
quoted for service and parts support.

Center Housing Rotating Assembly (CHRA) (2)

2:1
HX30/32/35/40W Service Repair Manual Component Identification

Installation Options
Type A

Type B

Type C

2:2
HX30/32/35/40W Service Repair Manual Component Identification

Type D

Type E

Type F

2:3
HX30/32/35/40W Service Repair Manual Component Identification

Exploded View - HX30/32W

34
8

91
61

22 82 7
75 66
81 43
32
16
31
33

36
11
70
11
12

64
64
64
64
96 13
62
53
4

38
62
6

28
71
28
5

46

80 67
74 136

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

2:4
HX30/32/35/40W Service Repair Manual Component Identification

Exploded View - HX35/40W

22

34
8

91
61
82
75
7
81 66
43
32
16
31
33

36
11 114
113
12 11 41
114

64
64
64
64

13
13
41
88
57 53
4

88 38
6
57

71
5

136

74 46

80 67

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

2:5
HX30/32/35/40W Service Repair Manual Component Identification

Exploded View - HX35W

34 8

22
91

75 61

81 7
66
43
32
16
31
33

36
11
114
11 113
12
114
64
64
64
64

41 13
88
53
4

38
6
57
71
5

46

74 80
67

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

2:6
HX30/32/35/40W Service Repair Manual Component Identification

Component List - HX30/32/35/40W

Item No. Description Quantity
1 Repair Kit CHRA (Core)*1
2 CHRA (Core) 1
4 Bearing Housing 1
5 Turbine Housing 1
6 Assembly, Turbine Wheel 1
7 Compressor Wheel 1
8 Compressor Housing 1
11 Journal Bearing* 2
12 Thrust Bearing* 1
13 Split Ring Seal, Turbine* 1/2
16 Split Ring Seal, Compressor* 1
22 Retaining Ring, Inlet Baffle 1
28 V-band Clamp, Turbine 0/1
31 Oil Slinger 1
32 O-Ring Seal, Bearing Housing* 1
33 Oil Baffle* 1
34 Inlet Baffle 1
36 Thrust Collar 1
38 Heat Shield 1
41 O-Ring Seal, Compressor Housing* 0/1
43 Oil Seal Plate 1
46 Gasket, Coverplate 1
53 Gasket, Oil Outlet* 1
57 Bolt, Turbine Housing 0/6
61 Locknut, Compressor Wheel 1
62 Locknut, V-band* 0/1
64 Retaining Ring, Bearing* 4
66 Insert, Retaining Ring 1
67 Bolt, Coverplate 2/3/5
70 Gasket, Oil Inlet* 0/1
71 Gasket, Turbine Housing* 1

Note
Exploded views may not contain all listed components.

2:7
HX30/32/35/40W Service Repair Manual Component Identification

Component List - HX30/32/35/40W

Item No. Description Quantity
74 Pre-set Actuator Kit comprising 1
73 Actuator 1
75 Hose Clamp 2
76 End Link, Assembly 1
77 End Link, Retaining Clip 1
83 Locknut, Actuator 2
128 Jam Nut 0/1
143 Breakoff Nut 0/1
80 Coverplate, Wastegate 1
81 Hose 1
82 Elbow, Coupling Hose 0/1
88 Clamp Plate, Turbine housing 0/2/3
91 Retaining Ring, Compresor Cover 1
96 Screw, V-band 0/1
113 Adapter, Oil Inlet 0/1
114 O-Ring Seal, Oil Inlet 0/2
116 Adapter, Oil Drain 0/1
117 O-Ring Seal, Oil Outlet 0/1
136 Bracket Kit 0/1

Note
Exploded views may not contain all listed components.

2:8
HX30/32/35/40W Service Repair Manual Component Identification

Purchaseable Service Tools

Service Tools
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.

Part No. Tool Description Tool Illustration

3575186 Circlip Pliers

56662 Circlip Pliers

56663 Circlip Pliers

56664 Circlip Pliers

4027202 Wastegate Air Feed Adapter

4027203 Wastegate Air Feed Adapter

4027204 E-Clip Tool

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.

2:9
HX30/32/35/40W Service Repair Manual Troubleshooting and Diagnosis

Fault Finding chart

Cyclic Sound from the Turbocharger

Oil Leak from Compressor Seal

Oil Leak from Turbine Seal

Poor Transient Response

High Oil Consumption

Black Exhaust Smoke

Blue Exhaust Smoke

Engine Running Hot

Engine Lacks Power

Turbocharger Noisy
Smoke
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
Failed actuator diaphragm
Replace using correct Actuator Service Kit
Seized wastegate valve (in turbine housing)
Free valve in accordance with details in the appropriate Holset publication replace complete turbine
housing sub-assembly
Leaking actuator hose
Replace hose and clips
Wastegate mechanism set incorrectly
Contact your approved Holset agent for correct setting procedure

3:1
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Service Tools
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

Dial Gauge and Dial Gauge Adapter -0+

10 10

TYPE 20
20 20

30 30
MERCER

40 40
50

3575186 Circlip Pliers

Pressure Gauge
Regulated Air Supply (Max 3 bar-45 lbf/in2)

4027204 E-Clip Tool

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.

4:1
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

On Engine Checks
Oil Leakage
Flange fitting M8 x 1.25

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

Replacement gaskets and flange fasteners should be

fitted without sealant as this can contaminate the oil.
Torque tighten to value specified by engine
manufacturer.
It is important to avoid kinked pipes during servicing
and subsequent operation.

Flange fitting M8 x 1.25

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

Replacement gaskets and flange fasteners should be

fitted without sealant as this can contaminate the oil.
Torque tighten 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° below the horizontal.

Oil Inlet Options

Pipe Fitting 11/16-16 UN (19 mm)
Adapter fitting M16 x 1.5 (22 mm)

Warning
The oil inlet is pressurized and no service action
should be taken with the engine running.
Replacement seals and adapters should be fitted
without sealant as this can contaminate the oil. Torque
tighten adapter to value shown in Service Data Sheet.
It is important to avoid kinked pipes during servicing
and subsequent operation.

Adapter fitting M12 x 1.5

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

4:2
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Closed crankcase ventilation systems have a tendency

to deposit oil in the compressor housing. Where
practical remove intake system pipework every
50,000 km (30,000 miles) to check housing,
compressor wheel and inlet baffle condition.

Always refer to Cleaning of Housings to clean

housing. Rotor components can be cleaned using a non
metallic bristle brush.

Warning
Always wear safety glasses during cleaning.

Exhaust Gas Leakage

Turbine housing flange leakage will cause soot
formation on the flange. Check exhaust manifold to
flange seal ensuring fastener torque meets engine
manufacturer’s recommendation.

Check flange for cracks.

M8 (13 mm)
Where practical remove exhaust system pipework to
check cover plate gasket condition (where fitted). Check
flange sealing face for cracking and distortion.

If exhaust seal is compromised replace

gasket/coverplate. Torque coverplate bolts to the value
specified in the Service Data Sheet.
Where turbine housing flange is cracked, remove
turbocharger for Turbine Housing Replacement.

4:3
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Where practical remove exhaust system pipework to

check exhaust system connecting profile for fretting
damage.

If sealing is compromised replace cover plate if

available ensuring fastener torque meets engine
manufacturer’s recommendation.

Coolant Leakage
M16 x 1.5
Repair by replacement of coolant inlet and outlet
fittings. Where housing threads are damaged replace
turbocharger. Torque tighten adapters to value specified
by engine manufacturerer.

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

Visual Checks
Check for cracked, bent or damaged compressor wheel
blades.

Caution
Never attempt to straighten blades.

Where practical, check for cracked, bent or damaged

turbine wheel blades.

Caution
Never attempt to straighten blades.

4:4
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

With intake system disconnected from compressor

housing, it may be possible to check visually for excess
bearing axial and radial clearances.
If in doubt, the turbocharger must be removed from
engine to check bearing clearance against
recommended values shown in Service Data Sheet.

If it is possible to check for wastegate actuator

rod movement and air leakage on engine, follow
the checking procedure described later in
Wastegate Actuator Checks.

Warning
Never attempt to check actuator using air supplied
from a running engine.

4:5
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Bearing Clearance
Secure the turbine housing and check the axial
clearance using a dial gauge.
Ensure clearance is within MIN/MAX values shown on
Service Data Sheet.
If axial clearance does not meet specification refer to
turbocharger Service and Overhaul to strip and rebuild KG
the CHRA (core).

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 refer to KG
turbocharger Service and Overhaul to strip and rebuild
the CHRA (core).

4:6
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Turbine and Compressor Housings

Note
On turbochargers with compressor mounted
wastegates it is necessary to free actuator end link
before removing compressor or turbine housings.
Always ensure the end link is locked in position before
removal. Refer to Wastegate Actuator Removal for
removal process.

Warning
The actuator rod may retract very quickly when freed
from lever arm keep fingers away from mechanism.
Always wear safety glasses when removing housings.

Turbine Housing

Note
Turbine housing option with cover plate fitted can be
removed without removing the cover plate.

Place compressor inlet on a clean flat surface. Mark

turbine housing, bearing housing and v-band clamp, KG
turbine (where fitted). This action assists in the re-
assembly process defining correct component
orientation.

V-band Option
M6 x 1 (10 mm)
Turn turbocharger on to turbine outlet face. Loosen
locknut, v-band clamp (62) and discard.

Caution
Some locknuts have a self-locking feature. These must
be replaced every time they are removed to ensure
long term clamp loading of the v-band.

KG

Clamp Plate Option

M8 x 1.25 (13 mm)
Secure turbine housing flange in vice.

Caution
Take care not to shear the clamp plate bolts.

Seized bolts may be freed by spraying with penetrating

oil and soaking for twenty minutes or a period of time
recommended by the oil manufacturer.
Loosen and remove the six bolts and clamp plates. KG

4:7
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Caution
Turbine blades can be damaged easily when the
turbine housing is removed. Do not bend the locating
pin that aligns bearing housing and turbine housing.

Using a soft hammer, tap turbine housing down against

a soft bench surface. As compressor assembly and V-
KG
band (where fitted) come loose, lift out of turbine
housing engagement

Caution
Turbine housings can exhibit cracking when subject to
excessive thermal and mechanical loads.

Cracking of the turbine housing inlet flange and inlet

duct generally requires turbine housing replacement.
Acceptance and rejection guidelines are shown in this
illustration. If an exhaust gasket is available, always
ensure that any cracks lie within its sealing area.

Check turbine housing inlet flange flatness is within

0.1 mm (0.004 in) before retaining component for re-
use.

Flange Fasteners - Clearance Holes

Check fastener hole diameter is not more than 1.5 mm
larger than the max. thread diameter of the fastener.

4:8
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Flange Fasteners - Threaded Holes

M10 x 1.5
Check flange threaded holes with an M10 x 1.5 thread
gauge.

Caution
Turbine housings can exhibit cracking when subject to
excessive thermal and mechanical loads.

Caution
Where a crack will cause leakage to atmosphere the
turbine housing must be replaced.

Cracking of the internal wall at the entry to the turbine

wheel (tongue) is an acceptable service condition and
the turbine housing may be re-used.

To refit turbine housing (5) position v-band clamp

(where fitted) over the bearing housing and align
indelible ink marks applied during disassembly.
Apply anti seize compound to bearing housing locating
bore of the turbine housing.
Carefully slide bearing and compressor housing
assembly into turbine housing. Use ink alignment mark
to locate housing assembly in correct orientation with
the turbine housing.

Caution
The turbine blades can be easily damaged when
installing in the turbine housing

V-band Option
M6 x 1 (10 mm)

Warning
Always wear safety glasses when refitting housings

Caution
Ensure locknut, v-band clamp is clean and oil free
before torque tightening.

Note
There are T- bolt and Hex- bolt versions of v-band
clamp but thread detail is common.

Place v-band clamp in correct orientation and torque

tighten new locknut (62) to value specified in
KG
Service Data Sheet.
4:9
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Clamp Plate Option

M8 x 1.25 (13 mm)
Secure turbine housing flange in vice.
Install the clamp plates and torque tighten the six bolts
to value specified in Service Data Sheet.
Depending on housing orientation, some clamp plate
bolts may have restricted access. In these cases, use a
suitable torque wrench adapter attached to a specially
calibrated torque wrench.

KG

Caution
On turbochargers with compressor mounted
wastegates, refer to Actuator Replacement when
attaching end link to valve mechanism.

Warning
Always wear safety glasses when removing or refitting
retaining rings.

Ensure rotor assembly freely rotates.

KG

Compressor Housing
Note
On turbochargers with compressor mounted
wastegates it is necessary to free actuator end link
before removing compressor or turbine housings.
Always ensure the end link is locked in position before
removal. Refer to Wastegate Actuator Removal for
removal process.

Warning
The actuator rod may retract very quickly when freed
from lever arm keep fingers away from mechanism.
Always wear safety glasses when removing housings.

4:10
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Note
Some HX35/40W compressor housings are roll
pinned to bearing housings. KG

Mark compressor housing, bearing housing and

retaining ring to record correct orientation. This action
assists in re-assembling the components and defines
orientation of the retaining ring.

Warning
Always wear safety glasses when removing retaining
ring.

Remove compressor cover retaining ring using circlip

pliers part no. 3575186.

KG

Caution
Compressor blades can be damaged easily when the
compressor housing is removed. Do not bend the roll
pin (where fitted) that aligns bearing housing and
compressor housing.

Using a soft hammer, gently tap the compressor

housing off the bearing housing.

On some turbocharger options, the bearing housing to

compressor housing joint is fitted with 0-ring seal,
compressor (41). This seal should be removed and
discarded at this stage.

Caution
Always fit a new seal on reassembly.

4:11
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Inspect internal profile of compressor housing for

scoring damage due to possible contact with
compressor wheel. Check compressor housing retaining
ring groove is free from deposits and is not worn.
Move to Cleaning of Housings if deposits remain.
Replace with new if profile damage is visible.

Caution
Good groove and abutment face condition are critical
to the integrity of compressor housing to bearing
housing joint.

Inlet Baffle Option

To clean compressor housings fitted with an inlet baffle A B
it is necessary to remove baffle.
Inlet baffle (A) is the old type; inlet baffle (B) is the new
type. Baffle (B) has been improved and no longer
incorporates the four stepped areas. This gives the new
baffle increased service life.

Caution
Always fit the new type of baffle (B) on re-assembly.

Caution C D
When removing the inlet baffle retaining ring, be
careful not to damage the compressor wheel with the
screw driver. Use a rag or rubber bung to protect the
wheel.

Using a flat screw driver, carefully apply force in the

area shown (C) as the retaining ring starts to move,
force the screwdriver under the ring as shown in (D).

Warning
Always wear safety glasses when removing or
refitting retaining rings.

Push the screwdriver in an anti-clockwise (counter-

clockwise) direction to force the retaining ring out of the
groove. Remove the retaining ring.
Remove the inlet baffle.

4:12
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Following cleaning of the compressor housing, locate a

new type of inlet baffle onto the location ledge of the
compressor housing inlet.

Warning
Always wear safety glasses when removing or
refitting retaining rings.

Hold one end of the retaining ring in position in its

compressor cover groove. Press the remainder of the
retaining ring into position using free hand.
Use a flat screw driver to make sure the retaining ring is
correctly seated in the compressor cover groove.

Warning
Always wear safety glasses when removing or
refitting retaining rings.

To refit compressor housing place the housing (8) on

clean surface. Fit new o-ring seal, compressor housing
(where fitted) to CHRA (2). Carefully slide the CHRA
assembly into the compressor housing. Use alignment
marks to locate assembly into bearing housing and to
locate on to roll pin (where fitted).

Caution
The compressor wheel blades can be easily
damaged when the CHRA is installed.

Caution
Be careful not to bend the roll pin during assembly.

Locate retaining ring over CHRA. Using circlip pliers,

part no. 3575186, fit the retaining ring.

Caution
The retaining ring must be fitted with the chamfered
face upwards away from the compressor housing.

Warning
Always wear safety glasses when removing or
refitting retaining rings.
KG

4:13
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Tap ends of retaining ring lightly with hammer and drift

to ensure that the retaining ring is properly located into
its groove in the compressor housing.

Warning
Always wear safety glasses when removing or
refitting retaining rings.

Caution
Ensure that drift does not damage bearing housing KG
during this operation.

Caution
On turbochargers with compressor mounted
wastegates, refer to Actuator Replacement when
attaching end link to valve mechanism.

Ensure rotor assembly freely rotates.

KG

4:14
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Cleaning of Housings
Visually inspect the parts to detect signs of burning and
other conditions in order to obtain as much information
as possible before washing.

Caution
Housing surfaces adjacent to turbine and compressor
wheels must be clean, smooth and free from
deposits.

Warning
Always wear safety glasses during cleaning.

Soak the housings in a non-corrosive low flash point

metal cleaner to loosen deposits.

Dry the components using compressed air.

Warning
Always wear safety glasses during cleaning.

Scale like deposits, if any, must be removed by using a

non metallic bristle brush. After removing the deposits ,
re-wash and dry the components.

Warning
Always wear safety glasses during cleaning.

4:15
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

It is permissible to bead blast the turbine housing if

chemical and brush cleaning is not effective.

Warning
Do not bead blast Aluminium and Cast Iron
components together.
Always wear safety glasses during cleaning.

Caution
Prevent the bead spray impinging directly on to the
wastegate valve spindle as beads can penetrate the
spindle bore, leading to spindle seizure.

After removing the deposits, re-wash and dry the

components.

4:16
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Wastegate Actuator Checks

Caution
Do not remove turbocharger from engine unless an
actuator check is impractical due to space or access
limitations or where an on-engine check has shown a
problem exists.

Warning
Always wear safety glasses during the disassembly
process. KG

Place the turbocharger on a suitable workbench. Using

a small flat screwdriver, carefully remove the hose clip.
Pull the flexible hose from the actuator spigot.
Discard the hose clips (75).

Connect and secure the hose from the regulated

compressed air supply to the actuator spigot.

Warning
Avoid touching the wastegate rod end area as finger
injury may result from sudden movement of the
assembly when air pressure is applied.
Carefully apply pressure to the actuator from the
regulated compressed air supply (Max 3 bar, 45 lbf/in2)
and check for actuator movement.

Seized Actuator Check

If rod does not move check wastegate actuator for air
leaks. If no air leak is found and rod does not
move,check valve mechanism for seizure according to
the procedure in Wastegate Mechanism Check.

4:17
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Actuator Removal
Warning
Always wear safety glasses during the disassembly
process.

Using a small flat screwdriver, carefully remove the end

link retaining clip.

Caution
Do not rotate actuator rod relative to actuator as this KG
can damage actuator internal components

Warning
The rod may retract very quickly when freed from
lever arm. Keep fingers away from mechanism.

Gently apply a small amount of air to the actuator and

when/if the rod end moves, carefully slide the link end
off the valve lever arm. If the actuator rod does not
move, a screw driver may be required to force the link
end off the lever arm.

M6 x 1 (10 mm)
1/4 - 28 UNF2B (7/16 in)

Remove actuator lock nuts.

Caution
Do not adjust the end link. This setting is critical to
actuator performance.

After removal of hose clip and hose, lift the actuator

away from the bracket until the studs clear the location
holes.
Discard hose clips (75).

Note
Compressor mounted actuators are removed using
the same four process steps.

4:18
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Actuator Bracket Removal and Replacement

Note
It is important to quote the correct turbocharger
assembly number, serial number and type from the
dataplate when ordering a replacement bracket kit CUMMINS HX35W

(136). IVECO HX35W

HX30/32/35/40W has a wide range of actuator bracket CUMMINS HX30W

types and installations.

VOLVO HX40W 3592731

VOLVO HX40W 3590007

MAN HX40W

Turbine Mounted Actuator

M8 (13 mm)

Warning
Always wear safety glasses during the removal and
replacement process.

Remove setscrews and retain with mounting spacers

(where fitted) and bracket

Replace bracket by inserting setscrews into the bracket

and correctly positioned spacers (where fitted).
Locate setscrews into threaded holes in turbine housing
and torque tighten to value specified in
Service Data Sheet.

4:19
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Wastegate Mechanism Check

Place the turbocharger on a suitable workbench. Using
a small flat screwdriver, carefully remove the hose clip.
Pull the flexible hose from the actuator spigot.
Apply an air pressure of 3 bar, 45 lbf/in2 to the actuator
spigot inlet. If the rod does not move, replace the
actuator with a pre-set replacement kit. (74).
If the lever arm is seized, the turbine housing will
require replacement. However, it may be possible to
free the lever arm.

Warning
Always wear safety glasses when checking wastegate
mechanism.

M8 (13 mm)

Caution
Take care not to shear the 5 coverplate bolts.

Remove cover plate option.

Seized bolts may be freed by spraying with penetrating
oil and soaking for 20 minutes or a period of time
recommended by the oil manufacturer.

Soak wastegate valve and lever mechanism in

penetrating oil.

Caution
Extra care must be taken when attempting to free
the valve mechanism. Any damage will result in the
replacement of the turbine housing.

Clamp a pair of quality mole (vice) grips to the lever

and gently apply pressure to rotate the lever arm in an
arc.
If this process does not free the valve mechanism, a
new turbine housing must be fitted.

4:20
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Caution
If the wastegate valve mechanism shows any fault, it
must be replaced. Using damaged turbine housings
will lead to inferior performance of the turbocharger,
and risk of irreparable damage to both turbocharger
and engine.

Radial cracks can occur around the valve seat when the
turbocharger has been abused or overheated.

Lever arm pin can be worn by partial seizure of the

valve mechanism. Scoring may be caused by arduous
local environmental conditions.

The same failure conditions can also lead to elongation

of the rod end bore which locates on the lever arm pin.
This must not exceed 0.50 mm (0.020 in).

Caution
If the wastegate shows any fault, it must be replaced.

4:21
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

Wastegate Actuator Replacement

Turbine Mounted Actuator

Caution
Contact your local approved agent for the correct KG
replacement actuator kit. It is important to quote the
correct turbocharger assembly number, serial number
and type from the dataplate to ensure the supply of
the correct pre-set actuator.
Note
When refitting existing actuator the end link will be
locked in the correct setting.

Thread new end-link several turns on to the shaft of the

new pre-set actuator assembly.

Warning
Always wear safety glasses during the assembly
process.

Caution
Do not apply force to push the actuator on to the
mounting face of the bracket.

Note
Do not fit the two mounting studs into the
bracket mounting holes at this stage.

Hold the actuator assembly with the spine of the spacer

piece upright (facing away from bracket). With the valve
held closed (pushed towards the compressor end) fit
end-link over the crank-arm pin.

To adjust the length of the actuator assembly, remove

from the turbo, rotate the end-link and re-fit, until the
underside of the actuator will just fit over the bracket
mounting lugs with less than 0.5 mm (0.020 in) gap.
Attempt to slide actuator over bracket locations. If the <0.020"
actuator fouls on the bracket or there is significant (0.5mm)

clearance the end link must be adjusted.

The setting is correct if, by rotating the end-link

clockwise by an extra half-turn, the actuator body will
foul on the bracket (i.e. the two studs are not touching
the side of the bracket).

4:22
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

1/4 - 28 UNF 2B (7/16 in)

M6 (10 mm)

Remove actuator assembly from lever arm ensuring

that the end link does not rotate relative to the rod. Fit
actuator mounting studs in to the holes in the bracket,
fit both actuator mounting nuts, and torque to value
shown in Service Data Sheet.
Note
Correct actuator orientation will have been recorded
during actuator removal.

Re-fit end link to the lever arm pivot pin. Fit new
e-clip (77) using special tool Part No. 4027204 to retain
end link on pin.

Warning
Always wear safety glasses when fitting retaining
rings.

5/16 - 24 UNF 2B (1/2 in)

Loosen spacer piece by turning jam nut anti-clockwise

(counterclockwise). Remove and discard tie-wrap and
spacer piece.

Continue turning jam-nut in the same direction, and

tighten against end link. Torque jam nut to value shown in
Service Data Sheet.

Caution
Before mounting turbocharger on engine, check for
full and free wastegate movement, previously
described in Wastegate Actuator Checks.
Refit the air supply hose with new clips (75). Clips
should be crimped closed using pinsers. Crimp gap will
vary due to spring back and hose type but will not be
less than 0.6 mm (0.0025 in).
Suitable alternative hose clamps can be used.

4:23
HX30/32/35/40W Service Repair Manual Component Testing and Replacement

New pre-set actuator kits may be supplied with a

tamper resistant break off nut instead of a jam nut to
secure the end link in its correct pre-set position. To
install a tamper resistant actuator
1. Slacken the shear nut from the spacer spine
2. Continue to turn the nut until it contacts the pre-
setend link
3. Continue tightening until the hex flats break
offleaving only the cone section in tight contact with
the end link.

Compressor Mounted Actuator

Note
Compressor mounted actuators are replaced using
the same seven process steps.

4:24
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Service Tools
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

Torque Wrench

Dial Gauge and Dial Gauge Adapter -0+

10 10

TYPE 20
20 20

30 30
MERCER

40 40
50

3575186 Circlip Pliers

56662 Circlip Pliers

56664 Circlip Pliers

Pressure Gauge
Regulated Air Supply (Max 3 bar-45 lbf/in2)

4027204 E-Clip Tool

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.

5:1
HX30/32/35/40W Service Repair Manual Title

Compressor Wheel Locknut Options

Note
Before disassembly, check for turbine and compressor
blade damage. Measure bearing radial movement and
KG
axial clearance to ensure the CHRA (core) is within
MIN/MAX shown on the Service Data Sheet.

Compressor Wheel Locknut Options (61)

HX30/32/35/40 turbochargers are fitted with alternative Hexagon Bi-hexagon
hexagon and bi-hexagon compressor wheel locknuts.
Older units have the hexagon nut which indicates that
the unit was rotor balanced during original manufacture
(OE).
OE units fitted with the bi-hexagon nut are core
balanced and will not feature alignment marks of shaft
and compressor wheel.

Where no alignment marks exist always mark shaft and

compressor wheel prior to disassembly of CHRA (core).

Caution
Rotor balance MUST always be checked before
re-assembly.

Hexagon M7 LH (13 mm)

Bi-hexagon M7 LH (10 mm)
The bi-hexagon nut has a lower tightening torque than
the hexagon option. Always refer to
Service Data Sheet for correct torque value.

Caution
Correct torque tightening is critical to turbocharger life.
Never under- or over-torque the compressor locknut.

5:2
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Disassembly
Locate part built CHRA on to 14 mm (HX30/32W) or 19
mm (HX35/40W) 12 point socket located in a suitable
fixture or vice.

Caution
Always make sure the turbine wheel shaft and
compressor wheel have alignment marks before
disassembly of the CHRA.

If no marks exist scribe the shaft and compressor wheel

before removing the compressor wheel lock nut. The
washing process may remove indelible ink so a file
mark on the shaft and scribe line on the compressor
wheel nose is recommended.

M7 LH (10mm or 13 mm)
Remove the locknut, compressor wheel (61).

Note
Left hand thread.

Warning
Always wear safety glasses during disassembly
process.

Remove compressor wheel (7).

Remove remaining CHRA from fixture and gently slide

bearing housing (4) off the assembly turbine wheel (6).
It is permissible to tap the protruding turbine shaft
gently with a soft hammer if the split ring seal/s are
stuck in their bore.

5:3
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Remove heat shield (38).

Carefully remove the split ring seal / seals,

*
turbine (13) .

Warning
Always wear safety glasses when removing sealing
rings.

Caution
Care should be taken not to score the turbine wheel
shaft assembly.

With bearing housing (4) on a flat clean surface, use

circlip pliers Part No 56662 to remove insert, retaining
ring (66).

Warning
Always wear safety glasses when removing retaining
rings.

It is practical to use free hand to contain disassembled

ring whilst releasing pliers.

Remove oil seal plate (43) using mole (vice) grips.

If the oil seal plate is stuck in its location, it is permitted
to use two screw drivers under the exposed lip to lever
out seal plate.

5:4
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Remove oil slinger (31).

Using piston ring expander pliers remove and discard

*
split ring seal, compressor (16) from oil slinger.

Warning
Always wear safety glasses when removing sealing
rings.

Remove oil baffle(33) * and discard.

Remove and discard the o-ring seal, bearing housing

*
(32) .

5:5
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Remove the thrust bearing (12)

and discard.
* from its pin locations

Remove the thrust collar (36).

Warning
Always wear safety glasses when removing retaining
rings.

Using circlip pliers, Part No. 56664, remove the two

*
circlips (64) and the journal bearing (11)
compressor end and discard.
* from the

Turn the bearing housing over and repeat the process

* *
of retaining ring (64) and bearing (11) removal at
turbine end.

Warning
Always wear safety glasses when removing retaining
rings.

5:6
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Component Cleaning
Visually inspect all parts to detect signs of burning and
other fault conditions in order to obtain as much
information as possible before washing.

Soak the components in a non-corrosive low flash point

metal cleaner to loosen deposits.

Warning
Always wear safety glasses during cleaning.

Dry the components using compressed air.

Protect the sliding surfaces of the cleaned parts against
corrosion by applying clean engine oil.

Warning
Always wear safety glasses during cleaning.

Scale like deposits, if any, must be removed by using a

non metallic bristle brush. After loosening the deposits
with the brush, wash and dry components as above.

Warning
Always wear safety glasses during cleaning.

5:7
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Exhaust Flange M10 x 1.5 - Cover Plate M8 x 1.25

Warning
Do not bead blast Aluminium and Cast Iron
components together.
It is permissible to bead blast the turbine housing if
chemical and brush cleaning is not effective.

Caution
Housing surfaces adjacent to turbine and compressor
wheels must be clean, smooth and free from deposits.
Always protect threads during bead blasting and clean
with the specified thread tap after blasting.

Oil fittings M16 X 1.5 - M14 x 1.5 - M8 x 1.25

Coolant fittings M16 x 1.5
It is important that the oil chamber of the bearing
housing is free of carbon before re-building. If heavy
deposits persist after repeat washing replace bearing
housing (4).

Caution
Do not bead blast the bearing housing as this may
damage critical bearing surfaces.

It is permissible to bead blast steel rotating parts.

Caution
Blasting specific areas for long periods of time may
affect component balance. Protect thread of turbine
wheel assembly.

Caution
Always clean components with compressed air after
blasting.

Warning
Always wear safety glasses during cleaning.

Caution
Do not bead blast the Aluminium compressor housing
as this may damage critical surfaces.

5:8
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Inspection and Testing

Major Components
Assembly Turbine Wheel 10
-0+

10

TYPE 20

Place assembly, turbine wheel (6) on a vee block.

20 20

Position a dial gauge on the turned surface of the shaft 30

40
MERCER

40
30

at the threaded end. Check dial gauge reading. Where 50

shaft bend is greater than the recommended maximum

of 0.025 mm (0.001 in) replace the assembly.

Caution
Do not attempt to straighten the turbine shaft.

*
Inspect split ring seal, turbine (13) groove walls for
wear. If groove width exceeds recommended maximum
replace assembly.
Single ring seal 1.69 mm (0.067 in)
Dual ring seal 3.55 mm (0.140 in)
If the wear step on the ring face exceeds 0.102 mm
(0.004 in) replace split ring seal, turbine.
If the free gap of the ring is less than 2.0 mm (0.08 in)
replace split ring seal, turbine.

Inspect the bearing journals for excessive scratches

and wear. Where scratching is excessive or where
either journal diameter is less than the recommended
minimum of 10.97 mm (0.43 in) replace the assembly.

Inspect for cracked, bent or damaged blades.

Caution
Never attempt to straighten blades.

Replace with new if any damage found.

5:9
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Compressor Wheel
Inspect compressor wheel (7), for cracked, bent or
damaged blades.

Caution
Do not attempt to straighten blades.

Replace with new if any damage found.

Compressor Housing
Inspect internal profile of compressor housing (8), for
scoring damage due to possible contact with
compressor wheel.
Return to Component Cleaning if deposits remain.

Replace with new if profile damage is visible.

Ensure position of compressor housing retaining ring

groove has not been compromised by wear.

Caution
Good groove and abutment face condition are critical
to the integrity of compressor housing to bearing
housing joint.

Cover Plate Option

Check exhaust system connecting profile for fretting
damage.

If sealing is compromised replace cover plate, if

available.

5:10
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

M8 (13 mm)

Caution
Take care not to shear the 5 coverplate bolts.

Remove cover plate option. Seized bolts may be freed

by spraying with penetrating oil and soaking for 20
minutes or a period of time recommended by the oil
manufacturer.
Check cover plate gasket condition. Check flange
sealing face for cracking and distortion.
If exhaust sealing is compromised replace
gasket/coverplate. Where turbine housing flange is
cracked, safely dispose of housing

Turbine Housing
Inspect the turbine housing (5) profile for damage
caused by possible contact with the rotor. Inspect the
outer and internal walls for cracks or flaking caused by
overheating.
Check turbine housing inlet flange flatness is within
0.1 mm (0.004 in). Check fastener hole diameter is not
more than 1.5 mm larger than the max. thread diameter
of the fastener.
Check v-band flange options for fretting damage. Check
clamp plate threaded hole options with the specified
thread gauge, (M8 X 1.25).
Replace with new if any of the above features are non
compliant.

After washing, the wastegate valve mechanism may

remain seized or stiff to operate. If so, soak the
mechanism in penetrating oil for approximately 20
minutes or a period of time recommended by the oil
manufacturer.

Warning
Always wear safety glasses when testing the
wastegate mechanism.

Caution
Extra care must be taken when attempting to free the
valve mechanism. Any damage will result in the
replacement of the turbine housing.

Clamp a pair of quality mole (vice) grips to the lever

and gently apply pressure to rotate the lever arm in an
arc.
If this process does not free the valve mechanism, a
new turbine housing must be fitted.

5:11
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Check the wastegate lever arm for evidence of rubbing

or cracking. Replace with a new turbine housing if
damage is visible.

Check the lever arm pivot for evidence of fretting

damage, wear or cracking.

Check the lever arm for cracking and or misalignment

due to mechanical damage.

Caution
If the wastegate valve mechanism shows any fault, it
must be replaced. Using damaged turbine housings
will lead to inferior performance of the turbocharger,
and risk of irreparable damage to both turbocharger
and engine.

Radial cracks can occur around the valve seat when the
turbocharger has been abused or overheated.

Inspect the wastegate rod end bore which locates on

the lever arm pin for elongation. Ovalisation must not
exceed 0.50 mm (0.020 in).

Caution
If the wastegate shows any fault, it must be replaced.

Air and Liquid Cooled Bearing Housings

Oil Flanges M8 x 1.25 - Oil Adapter M12 and M16 x 1.5
Inspect journal bearing bores for wear and score marks.
Replace bearing housing (4) if a bore diameter exceeds
a maximum of 15.88 mm (0.625 in) or when bore
scratching is severe.
Ensure groove locations for retaining rings, bearing (64)
are free from deposits and do not exceed width of 0.82
mm (0.032 in).
Check that the oil cavity is free from carbon and any
entrained debris that may be the result of a failure.
Ensure all oil port threads are clean then check with the
appropriate thread guage.

5:12
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Caution
Bearing housing clamp plate interface can corrode in
high temperature operation. Bearing housings
showing corrosion or v band fretting damage must be
replaced.
Liquid Cooled Bearing Housing
M16 x 1.5
Ensure all coolant port threads are clean then check
with the appropriate thread gauge.

Check oil seal plate retaining ring groove does not

exceed a maximum width dimension of:
2 mm (0.079 in).

Small Components
Oil Slinger
Inspect and replace oil slinger (31) if the split ring seal,
compressor (16) * groove walls are scored or
damaged or if groove width exceeds a maximum of
1.67 mm (0.066 in).
Check for signs of rubbing and scoring on the thrust
surface and replace where damage is severe.
If the ring faces show any signs of wear replace the
split ring seal, compressor (16) .
*
If the free gap of the ring is less than 2.0 mm (0.08 in)
replace the split ring seal, compressor (16) .
*
Oil seal plate
Inspect the seal bore of the oil seal plate (43) and
replace if scored or damaged.

5:13
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Heat Shield
Check and replace if the heat shield (38) is distorted or
if signs of rubbing or cracking are visible.

Thrust Collar
Check and replace if thrust collar (36) is scored on
thrust face or if any cracks are visible.

Compressor Inlet Baffle Option

Check baffle for debris entrainment damage. Always fit
new type inlet baffle on reassembly.
Refer to Turbine and Compressor Housings for
re-fitting instructions.

Warning
Always wear safety glasses when removing or
refitting retaining rings.

5:14
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Reassembly
Rotor Balance

Caution
This turbocharger may have been manufactured using
the core balance process. Rotor balance MUST
always be checked on re-build.

A turbocharger should always have co-relation marks

on the end of the turbine shaft and impeller nose if it
has been disassembled according to the process
defined in Disassembly. The thrust collar and oil
slinger will not have co-relation marks.

Components that should be included in rotor balance

are:
• Turbine wheel and shaft
• Thrust collar
• Oil slinger
• Compressor wheel
• Nut
Balance is achieved by relative rotation of components
as indicated by the balance machine output.

The balance process requires a purpose built rig and Balance Flow Chart

compliance with the rig procedure. Load

Component
Rotate At
Balancing Speed
Re-load
Component

Rotor balance limits appear in the Service Data Sheet. Hold

Steady Speed
On achieving balance, parts should be permanently
Measure Out
marked for subsequent re-alignment during reassembly. Of Balance

Halt Clean
Rotation Component

Caution Display Balance Take Corrective

Data Action
Only use genuine Holset compressor wheels and
assembly turbine wheels which are individually check Unload NO Corrective YES Unload
Component Action Required? Component
balanced for long life and quiet operation.

Caution
Always make sure the balance marks on the rotor
assembly are in alignment when rebuilding the
turbocharger.

Caution
Both 6 and 12 point nuts have been used on this
range of turbochargers. Ensure correct tightening
torque specified in Service Data Sheet is used.

5:15
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Turbocharger Reassembly
Warning
Always wear safety glasses when refitting retaining
rings.

Caution
Make sure the circlips are always fitted with the
bevelled edge facing the journal bearing. Premature
failure will result from incorrect fitting.

Place bearing housing compressor mating face on a

clean surface.
Fit inner turbine end retaining ring, bearing (64)
circlip pliers Part No. 56664.
* using
Lubricate the journal bearing (11)
oil and install.
* with clean engine

Fit the outer retaining ring (64)

edge facing the bearing.
* with the bevelled

Turn the bearing housing over and repeat the retaining

ring (64)
* *
and journal bearing (11) installation
process at compressor end.

Install heat shield (38).

5:16
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Warning
Always wear safety glasses when refitting sealing
rings.

Using expander pliers, install new split ring seal / seals,

*
turbine (13) to assembly turbine wheel (6). Some
applications contain dual ring seals. It is clear from the
groove width dimension whether single or dual split ring
seals are required.

Caution
Align dual split ring seals (13) so the gaps are
positioned 180˚ apart. Gently press down on the
turbine wheel - a slight rotation of the wheel will assist
in properly locating the split ring seals.

Lubricate the shaft with clean engine oil and insert into
the journal bearings. Positively locate the seal ring
*
(13) into position and ensure the assembly turbine
wheel rotates freely.

Place assembly on clean flat surface supporting the

assembly turbine wheel (6) in a suitable fixture.
Ensure all thrust contact faces are clean.
Insert thrust collar.

Caution
Align the balance mark on the thrust collar with that
on the shaft, if applicable.

Apply clean engine oil to installed thrust collar (36) and

*
insert thrust bearing (12) .

5:17
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Apply a small amount of engine oil to the o-ring and

insert the o-ring seal, bearing housing (32) . *

Install new split ring seal, compressor (16)

slinger (31).
* to oil
Warning
Always wear safety glasses when refitting sealing
rings.

Install oil slinger (31) into oil seal plate (43).

Install the oil baffle (33)

seal plate (43).
* into oil seal plate into the oil

5:18
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Align the tongue of the oil baffle with the aperture in the
bearing housing and install the seal plate assembly.

Transfer assembly from fixture locating on turbine wheel

nose to one locating on bearing housing.
Install oil seal plate (43) into the bearing housing (4).

Caution
Align the balance mark on the oil slinger with that on
the shaft, if applicable.

Warning
Always wear safety glasses when refitting retaining
rings.
Locate part built CHRA on to 14 mm (HX30/32W) or 19
mm (HX35/40W) 12 point socket located in a suitable
fixture or vice.
Use circlip pliers Part No. 56662 to install the insert,
retaining ring (66).It may be necessary to lift the
bearing housing to its upper clearance limit to fully
expose circlip groove.

Caution
The retaining ring must be fitted with the chamfered
face upwards away from the oil seal plate.

Use soft hammer and drift to ensure retaining ring (66)

is properly located.

5:19
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Install compressor wheel (7).

Caution
Before installation ensure compressor wheel is clean
and back face is free from oil. After installation smear
light oil to shaft thread and compressor wheel locknut
face.

Align the balance marks scribed on shaft and

compressor wheel.

Brush the thread and nut face with an anti-seize

compound to avoid loss of alignment during torque
tightening.

M7 LH (10 or 13 mm)
Install the locknut, compressor wheel (61) and tighten
to the torque value defined in the Service Data Sheet.

Caution
Ensure locknut, compressor wheel is clean and
smeared with light oil. Hand tighten and correct any
excessive/unusaul torque characteristic before torque
tightening.

Caution
Ensure that the balance marks remain aligned on
compressor wheel and shaft throughout torque
tightening sequence.

Caution
Both 6 and 12 point nuts have been used on this
range of turbochargers. Ensure correct tightening
torque specified in Service Data Sheet is used.

Note
Left hand thread.
Lubricate o-ring seal (41) (where fitted)with clean
engine oil and install into retaining groove

5:20
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

V-band Option
Place turbine housing (5) on a clean surface. Place
v-band clamp loosely into position on the turbine
housing. Carefully slide CHRA (2) assembly into the
turbine housing.

Caution
The turbine wheel blades can be easily damaged
when the CHRA is installed.

M6 x 1 (10mm)
Place v-band clamp, turbine (28) in position and torque
*
tighten new locknut v-band (62) to value specified in
Service Data Sheet.
Ensure rotor assembly freely rotates.

Warning
Always wear safety glasses during assembly process.

Note
There are T-bolt and Hex-bolt versions of v-band
clamp but thread detail is common.

Caution
Ensure locknut, v-band clamp is clean and oil free
before torque tightening.

Clamp Plate Option

M8 x 1.25 (13 mm)
Secure turbine housing flange in vice.
Locate the C.H.R.A. into the turbine housing (5).
Install the clamp plates (88) and tighten the six bolts
(57) to the torque value specified in
Service Data Sheet.
Depending on housing orientation, some clamp plate
bolts may have restricted access. In these cases, use a
suitable torque wrench adapter attached to a specially
calibrated torque wrench.
-0+
10 10

Check thrust clearance using a dial gauge. Ensure

TYPE 20
20 20

30 30

clearance is within MIN/MAX values shown on 40

MERCER

50
40

Service Data Sheet.

5:21
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Check compressor end radial movement using a dial

gauge. Ensure clearance lies within MIN/MAX TIR (Total
Indicator Reading) values shown on

30

20

10
40
Service Data Sheet.

MERCER

-0+
50

TYPE 20
40

10
30

20
Place compressor housing (8) on a clean surface.
Carefully slide CHRA (2) assembly into the compressor
housing. Use alignment marks to locate assembly onto
roll pin (where fitted) into the bearing housing.

Caution
The compressor wheel blades can be easily damaged
when the CHRA is installed.
KG

Caution
Be careful not to bend the roll pin during assembly.

Locate compressor cover retaining ring (91) over

CHRA. Using circlip pliers, part no. 3575186, fit the
retaining ring.

Warning
Always wear safety glasses when refitting retaining
rings.

Caution
The retaining ring must be fitted with the chamfered
face upwards away from the compressor housing.

Using a soft hammer and drift, ensure retaining ring is

properly located.

Caution
Ensure that drift does not damage bearing housing
during this operation.

5:22
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Pre-set Wastegate Actuator Reassembly

Caution
Contact your local approved dealer for the correct
replacement actuator kit (74). It is important to quote
the correct turbocharger assembly number, serial
number and type to ensure the supply of the correct
pre-set actuator.

Note
When refitting existing actuator the end link (76) will
be locked in the correct setting.

Thread new end link (76) several turns on to the shaft

of the new pre-set actuator assembly (73).
Hold the actuator assembly with the spine of the spacer
piece upright. Rotate the valve mechanism lever arm to
close the wastegate valve (pushed towards the
compressor end). Fit end link (76) over the lever arm
pin.
Attempt to slide the pre-set actuator (73) over its
retaining bracket. If the actuator fouls on the bracket or
there is significant clearance between bracket and
actuator base, actuator rod length requires adjustment.

Note
Do not fit the wastegate studs to the bracket at this
stage.
To adjust the length of the actuator assembly, remove <0.020"
(0.5mm)
from the turbocharger. Rotate the end link (76) to
shorten or lengthen the rod as appropriate. Re-fit, until
the underside of the pre-set actuator (73) will just fit
over the bracket mounting face with less than 0.5 mm
(0.020 in) gap.

Caution
Do not apply force to push the actuator on to the
mouting face of the bracket.

The rod length setting is correct if, by rotating end link

(76) clockwise by a half turn, the actuator body fouls on
the bracket.

5:23
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

Warning
Always wear safety glasses during assembly process.

1/4 - 28 UNF 2B (7/16 in)

Remove the pre-set actuator assembly from the lever
arm ensuring that the end-link (76) does not rotate. Fit
actuator mounting studs into their locating holes (or
slots) in the bracket. Fit both actuator mounting nuts
(83) and torque tighten to the value shown in the
Service Data Sheet.

Caution
Do not rotate actuator rod relative to actuator as this
can damage actuator internal components.

Re-fit end link to the lever arm pivot pin. Fit new end
link, retaining clip (77) using service tool Part No.
4027202 to retain rod end on pin.

Warning
Always wear safety glasses when fitting retaining
rings.

5/16 - 24 UNF 2B (1/2 in)

Loosen spacer piece by turning jam-nut (128) anti-
clockwise (counter-clockwise). Remove and discard tie
wrap and spacer piece.
Continue turning jam-nut (128) in the same direction,
and torque tighten against end link (76) to value shown
in Service Data Sheet.

New pre-set actuator kits (74) may be supplied with a

tamper resistant break off nut instead of a jam nut to
secure the end link in its correct pre-set position.
To install a tamper resistant actuator
1. Slacken the shear nut from the spacer spine
2. Continue to turn the nut until it contacts the pre-
setend link
3. Continue tightening until the hex flats break
offleaving only the cone section in tight contact with
the end link.

5:24
HX30/32/35/40W Service Repair Manual Turbocharger Service and Overhaul

On hose fed actuator options, refit the air supply hose

with new hose clips (75). Clips should be crimped
closed using pinsers. Crimp gap will vary due to spring
back and hose type but will not be less than 0.6 mm
(0.025 in).
Suitable alternative hose clamps can be used.

Caution
Before mounting turbocharger on engine, check for full
and free wastegate movement.

M8 (13 mm)
Replace cover plate (option) (80) and tighten cover
plate bolts (67) to torque value specified in the
Service Data Sheet.

Warning
Always wear safety glasses during assembly process.

Ensure rotor assembly freely rotates.

KG

5:25