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This is a collection of technical papers published by MAN Diesel & Turbo, Copenhagen/Holeby, Denmark, covering both MAN B&W two-stroke and MAN four-stroke diesel engines.

Our technical papers provide information on new engine developments and trends, service experience, important aspects of engine management and maintenance, and emissions requirements compliance and development, etc. 

If you are using Internet Explorer 8 or 9 and you are having problems opening the documents, please right-click the files to save them on your local drive. Or completely disable the ‘PDF in Browser’ setting in your Acrobat Reader.

  • Nov 06, 2017

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    SL2017-653
    Accumulators - All Makes and Types - updated information
    PDF, 2.35 MB
  • Oct 17, 2017

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    SL2017-652
    Safety Precautions - 30-98 bore engines
    PDF, 3.77 MB
  • Sep 06, 2017

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    SL2017-650
    Guiding Overhaul Intervals Updated tables Replaces SL2017-643/SRJ
    PDF, 568.83 KB
  • Aug 03, 2017

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    SL2017-648
    New Gasket Material for Roller Guide Housing
    PDF, 398.40 KB
  • May 11, 2017

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    SL2017-647
    Ridge Wear at Crankpin Journals (Replacement of SL2016-634/JNN)
    PDF, 758.43 KB
  • May 05, 2017

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    SL2017-646
    Multiway Valve Overhaul Programme - FIVA, ELFI and ELVA
    PDF, 962.47 KB
  • Apr 18, 2017

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    SL2017-645
    Fretting/Corrosion in Main Bearing Bore
    PDF, 1.81 MB
  • Mar 27, 2017

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    SL2017-644
    Overhaul Strategy ME/ME-C and ME-B Engines - ME specific components
    PDF, 4.94 MB
  • Mar 08, 2017

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    SL2017-643
    Guiding Overhaul Intervals - Updated Tables
    PDF, 466.12 KB
  • Mar 08, 2017

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    SL2017-642
    Fees for Technical Assistance and Advisory Work
    PDF, 2.36 MB

All data provided on this site is for information purposes only, explicitly non-binding and subject to changes without further notice.

Unless otherwise stated, the copyright and any other rights in the contents of the Service Letters available through our website, including any images and text, are owned by MAN Diesel & Turbo.

For the avoidance of doubt, you must not adapt, edit, change, transform, publish, republish, distribute, redistribute or show in public the Service Letters (in any form or media) without the prior written consent of MAN Diesel & Turbo.

Permission is granted to:

1) download, display or print material for personal use or use within an individual organisation and for a non- commercial purpose;

2) create links to these pages;

3) reproduce short extracts provided the source is stated. 

Requests for further authorisation regarding proposed usage of the information provided should be addressed to: 

MAN Diesel & Turbo
Teglholmsgade 41
2450 Copenhagen SV
or by email to 

peterd.petersen@man.eu