SL2016-632/AAB Alpha Lubricator Service Experience

This service letter applies to MAN B&W two-stroke marine diesel engines of the MC/MC-C type.
Furthermore, the aim of the service letter is to address the service issues that have come to our attention, as well as to introduce service kits for the Alpha lubrication system.

Overhaul and Maintenance Strategy
Based on our service experience and our guideline for overhaul intervals, the following parts must be replaced every 5 years or 32,000 R/H to ensure optimal and trouble free operation.

Note that lack of maintenance may result in low or missing accumulator pressure, worn solenoid valves as well as defective non-return valves, which all may cause excessive lubrication above the setpoint. This can be avoided by using the recommended overhaul and maintenance strategy.