Change And Quality Of Lubricating Oil - Bukh DV36/48 Workshop Manual

N8

Change and quality of lubricating oil

Exchange the lub. oil every 150 operating hours or once a year.
This is done with a bilge pump, fitted on the engine. This pump can be set for emptying the
engine or gearbox of lub. oil by means of the three-way cock.
Lub. oil content inclusive of filter is 4.9 Litres.
Pour fresh oil through the filling hole in the top cover.
Normally a lubricating oil quality mark "Service CC" must be used, but for operation under
difficult conditions, i.e. frequent cold starting, short working periods, very varying load,
quality marked "Service CD" must be used.
Besides, quality marked "Service CD" must be used if the sulphur content of the fuel is
higher than 1 per cent.
The chosen viscosity of oil depends on the air temperature at the engine.
In air temperatures at the engine below 5°C viscosity SAE 10 is used or 5W/30 multigrade.
In air temperatures at the engine between 5°C and 25°C viscosity SAE 20 is used or
10W/30 multigrade.
In air temperatures at the engine above 25°C viscosity SAE 30 is used or 15W/40 multigrade.
As many lubricating oils today are multigrade the above should be used as a guidance for
choosing an oil with the correct spectrum of viscosity.
For lifeboat engines where cold start is required down to minus 15°C within 2 minutes
MOBIL OIL NO 1 or similar must be used for the engine as well as for the gearbox.
009W2329-R01