Wear of cylinder liners, crankpin and main bearings, due to an insufficient insulation of a measuring instrument.

Cause and effect

An insufficient insulation of a measuring instrument generated a voltage difference between the engine block and the turning crankshaft.

Due to this spark generation occurs between the bearings and the crankshaft.

Small metal particles from the bearings and the crankshaft caused wear of the crankpin and crankshaft bearings and also the crankshaft and cylinder liners showed wear and tear.

All bearings have to be renewed, the crankshaft has to be dismounted, cleaned, polished and aligned. Due to this all the cylinder heads and pistons with piston rods have to be dismounted.

A total reconditioning of the engine!

All measuring instruments of the engine and also of the other engines have to be checked for insufficient insulation.

cilindervoering-b9_01_full

The wear of the cylinder liner

drijfstanglager-b9_02_full

The wear of the crankpin bearing

 

dieselenginebook

The new Diesel Engine Book

Look inside ′Diesel Engines′

This third completely revised edition, May 2017, of a three-part book on diesel engines is intended for all who work with diesel engines for maritime propulsion and power generation.

Read more »
dieselenginebook

News from the author

The diesel-engine manufacterers

The production level of diesel engines is low. Who have an important market share in the four diesel engine categories?

Read more »
dieselenginebook

Topic of the month

Wear of cylinder liners

Insufficient insulation of electrical systems on dieselgenerator sets can cause serious damage of cylinder liners and crankpin and crankshaft bearings.

Read more »
dieselenginebook

Special

Dual fuel engines for lower emissions

Natural gas is the ideal fossil fuel to minimize the exhaust- gas emissions of modern dual-fuel diesel engines; also the cost of maintenance and repair will be reduced considerably.

Read more »