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Holset HX25 User Manual

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Holset HX25/25W/27W
Service Repair 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.
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Holset HX25 Specifications

General IconGeneral
TypeTurbocharger
Compressor Wheel Diameter46 mm
Turbine Wheel Diameter56 mm
Bearing TypeJournal Bearing
Oil InletM12 x 1.5
Oil OutletM12x1.5
Weight5.5 kg
Max Power Output150 HP
Compressor Housing Inlet2 inches
Compressor Housing Outlet1.5 inch

Summary

Foreword

Introduction

About the Manual

Explains the manual's purpose and structure for turbocharger overhaul.

How to Use the Manual

Guides users on navigating the manual's sections and links.

Description and Operation of Turbocharger

General Information

Defines a turbocharger and its benefits for engine performance.

Effects of wrong match

Lists consequences of incorrect turbocharger boost pressure (too low/high).

Notes, Cautions and Warnings

Specific Safety Warnings

Highlights critical warnings regarding temperature, balancing, and material handling.

Installation Data

Installation Checklist

Turbocharger Identification

Dataplate

Describes the turbocharger dataplate and its importance for service and parts support.

Installation Options

Type A HX27W

Shows the installation configuration for Type A HX27W turbochargers.

Type B HX25

Shows the installation configuration for Type B HX25 turbochargers.

Purchasable Service Tools

Service Tools

Lists special tools available for purchase for servicing the turbocharger.

Fault Finding chart - All Applications

On Engine Checks

Oil Leakage

Provides instructions and warnings for checking oil leakage on the engine.

Disassembly

Pre-disassembly Checks

Check for blade damage and measure bearing movement before disassembly.

Inspection and Testing

Major Components

Details inspection procedures for turbine wheel, seals, and bearings.

Reassembly

Core Balance

Explains the necessity of core re-balancing using a vibration sorting rig (VSR).

Turbocharger Reassembly

Step-by-step instructions for reassembling the turbocharger components.