Guidelines for crankshaft repairs

Experience transfer & knowledge sharingJonas Gustavsson/Gard & Steffen Fischer/SCUA Hamburg

Background, 2 skiers with Diesel repairs as a hobby

The project- short recap

A project by Jonas Gustavsson/Gard & Steffen Fischer/SCUA

The final paper to be a SCUA Hamburg brand ”product”

Objectives;1. Heattreatment, a repair method accepted by Class2. Collect info. & data to produce ”Guidelines to crankshaft repairs”

Sponsered by leading Scandinavian Marine UW’s, budget 30k€

- Gard, NHC, Gerling & Alandia

Annealing Process, known Service providers

• Goltens, long experience of mobile machining & in-situe repairs.

Successfully annealed over 75 crankshafts In-Situ and in workshops, during the past 7 years.

• Wärtsilä, long experience of mobile machining & in-situe repairs.

Successfully annealed more than 50 crankshafts In-Situ and in workshops, during the past 7 years.

Have also evaluated induction heating (spot heating).

Goltens Approval Certificate 2012-09-04

Status and next steps

Heat Treatment in situ in our opinion reliable proven as to be the favourable repair method.

The Class approval for Goltens repair procedure a good step ahead.

Next, approval from other IACS members

Find time to continue with the guidlines (less skiing)

Low inflow of applicable cases, 2 cases reported in 2 years....has crankshaft failures ended ??

Interesting NHC case in S.Korea currently, Steffen attending

Main Engine damage trends 2 & 4 stroke Main propulsion machinery 2002 – 2011, Gard H&M portfolio

How to fix a ME damage…..

Glue it !