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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.

  • Jun 20, 2018

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    SL2018-662
    Boll & Kirch Hydraulic Oil Filters for ME Engines
    PDF, 553.14 KB
  • May 11, 2018

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    SL2018-661
    New Piston Ring Package (Replacement of SL2018-657/JNN)
    PDF, 2.08 MB
  • Apr 24, 2018

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    SL2018-660
    Issuing of Service Letters - By e-mail
    PDF, 144.11 KB
  • Mar 23, 2018

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    SL2018-659
    Cermet-Coated Piston Rings for Operation on Low-Sulphur Fuels (0.5% S or lower) Including LNG, LPG, methanol and ethane, replaces SL2017-633/JAP
    PDF, 395.46 KB
  • Mar 23, 2018

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    SL2018-658
    Safety Information, indicator valves
    PDF, 438.36 KB
  • May 02, 2018

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    SL2018-657
    New Piston Ring Package
    PDF, 1.57 MB
  • Apr 04, 2018

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    SL2018-656
    Elongation Measurements of Hydraulically Tightened Bolts
    PDF, 1.14 MB
  • Dec 22, 2017

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    SL2017-655
    Fees for Technical Assistance and Advisory Work - MAN PrimeServ, Copenhagen
    PDF, 574.79 KB
  • Nov 24, 2017

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    SL2017-654
    Crankshaft Torsional Vibration Damper
    PDF, 480.24 KB
  • Nov 06, 2017

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    SL2017-653
    Accumulators - All Makes and Types - updated information
    PDF, 2.35 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