OPERATING MANUAL FOR BUKH DV48RME LIFEBOAT ENGINES
009W4226-R09
- 10 -
RME-ENGINES MOUNTED WITH HYDRO- OR SPRING STARTER EQUIPMENT
(service info 9201)
The above mentioned type of starting method has proved to start the lifeboat engines in a very short period of time. In cold
climates a standard multigrade lubrication oil may not be sufficient for a rapid build-up of lub. oil pressure. We recommend
the following methods to prevent problems:
1. Full synthetic low friction lub. oil with a viscosity of 5W/40 or 10W/30 (e.g. Mobil No. 1 or Castrol Syntruck).
2. Cooling water jacket heater.
3. Oil sump heater.
In view of starting time the above points also increase the electrical start performance.
LUBRICATION OIL QUANTITIES FOR DV36RME AND DV48RME
(service
info
0202)
When the engine is dry, you are recommended to fill up with 4.9 litres of lubricating oil (min. 4.3 litres - max. 5.5 litres).
A dip stick with standard indications of minimum (63 mm) and maximum (75 mm) oil levels for checking of the oil quantity is
located on the side of the engine.
THESE INDICATIONS APPLY WHEN THE ENGINE IS IN HORIZONTAL POSITION!
When mounted in a lifeboat, the engine is rarely in a horizontal position. Usually, it has an aft inclination of max. 15
o
, which
will change the oil level on the dip stick.
The following values are intended as a guide:
Oil level when 4.9 litres of oil have been added to the engine:
Horizontal engine:
Oil level on dipstick= 69 mm
Engine inclination 15
o
aft:
Oil level on dipstick= 61 mm
Engine inclination 30
o
forward:
Oil level on dipstick= 60 mm
Irrespective of the inclination, engine running will be troublefree if the above oil quantity has been added. If more oil than
advised is added, the crank will be running submerged in oil. Consequently, the oil will get too warm and foam, and bleeding
will be inadequate.
Oil vapour will condense and in extreme cases run out of the suction filter.
Do NOT fill the engine with more oil than indicated above.
It will not be necessary to adjust the oil quantity of freefall boats, in which the engine will
be started while the boat is still in the chute at an inclination of approx 30°.
INSTRUCTION FOR MARINE DIESEL FUEL IN COLD CLIMATES
COLD
FILTER
PLUGGING
POINT
(CFPP)
(service info 0502)
To ensure proper operation of the lifeboat engines in very cold climates, it is essential to ensure that the diesel fuel in the
fuel tank of the lifeboat is suitable to the lowest temperature possible in the area of operation of the ship. The temperature
where the fuel is no more filterable is called "CFPP" in the specifications for the particular fuel
To improve the CFPP-point, a dilution with kerosene is recommended. A max. dilution of 40% kerosene is possible. If 50%
or more are necessary, 2-stroke lubricating oil must be added to protect the fuel injection pump and nozzles from seizure.
If no information is available onboard the ship about the particular fuel to be diluted, it is recommended to use 2-stroke
lubricating oil in ratio 0.3 ltrs. to 100 ltrs. of fuel. This is necessary due to the fact that the diesel oil might be winter-type and
already diluted from the oil company.
The reason for the necessity of 2-stroke lub. oil is that it is self-mixing with the fuel.
Note: In ship storage tanks a max. of 25% dilution is the limit, in order to ensure that min. flame point of fuel = 55°C.
For operation below -28°C use specific Arctic fuel.
EXAMPLE:
Diesel Oil without Dilution
CFPP/-18
o
C
90 litres 10 litres kerosene
80 litres 20 litres kerosene
70 litres 30 litres kerosene
60 litres 40 litres kerosene
50 litres 50 litres kerosene
-20°C
-22°C
-24°C
-26°C
-28°C
Specific Arctic fuel
-40°C
