OPERATING MANUAL FOR BUKH DV24ME ENGINES
009W0825-R02
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Fuel lift pump
The fuel lift pump is a cam shaft driven sealed type diaphragm pump, which cannot be
dismantled for repair or cleaning. It is recommended to install a water/dirt accumulating filter in
the suction line to the pump.
After repairs the fuel system must be bled as described under ”Preparation for the first start” if
necessary.
Lubricating Oil System
The engine is pressure lubricated and the oil system has a built-in relief valve for controlling
the oil pressure. The oil level is checked as mentioned before.
Change of Oil
Lubricating oil should be changed for the first time after 25 hours of running, later for every 150 hours or at least once a
year. It is recommended to change the oil when engine is warm, and the procedure is as follows:
1. Remove the dipstick.
2. Insert the sump pump suction hose into the hole and pump up the oil.
3. When the sump is empty reinsert dipstick and pour fresh oil.
4. If possible, drain the oil through the plug hole at the bottom of the sump.
Recommended Lubricating Oil
Modern diesel engines demand heavy-duty oils with additives securing best operation conditions and longest life time of the
engine under various conditions. Therefore use a first class HD-oil from a recognized oil company.
Oil specifications as mentioned in ”LUBRICATION OIL CHART”.
When operating under difficult conditions, i.e. frequent cold starting, short operation periods, greatly varying loads, use
quality ”Service D” and also use quality "Service CD" in case the sulphur content of fuel is higher than 1 %.
Change of Lubricating Oil Filter
Lubricating oil filter cannot be cleaned, but should be changed every 150
hours or once a year. To change the filter proceed as follows :
1. Unscrew filter A and discard it.
2. Clean the sealing surface of the engine B, and remove old gasket C if any
from old filter
3. Mount new filter at once under clean conditions.
4. Screw on filter until gasket fits tightly, tighten a further half turn.
5. Fill with oil until normal level is reached.
6. Start the engine and check that the filter is tight.
Cooling System
Normally the engine is supplied with salt water cooling-system, and with a
thermostat securing a constant engine temperature at varying load. About
cooling water temperature: See “Technical Dates”.
In order to avoid corrosion of the cooling jackets a zinc-rod has been screwed
in on the right side of the rear of the crankcase (see pos. 24 on page 3).
The hexagon plug should be removed 2-3 times a year for examination.
If the zinc-rod is corroded more than 50% it should be replaced.
Water circulation is effected by means of a rotary vane pump with neoprene impeller.
Due to the varying temperatures and the one-sided deformation of the impeller during the long winter storage, the rubber
impeller should be replaced at the annual launching. Alternatively the impeller can be taken out and kept separately during
this period. If water is coming out at the drain hole at the underside of the flange of the pump against the engine, it is
necessary to replace the gasket in the pump as soon as possible.
Replacement of Impeller
1. Remove the front cover of the pump after having
drained off the water from the engine.
2. The impeller can now be removed from the pump
housing by using tongs or two screwdriwers.
3. Refitment of the impeller is made in reverse order.
In case of defects on the thermostat, the thermostat will close
for the cooling water passage and the engine will thus be too
hot. If the thermostat is removed, the shunt must be shut off.
Too high cooling temperature will cause the blue lamp in the
control panel to light up and the acoustic alarm to function.
Replace the thermostat insert by loosing the four nuts in the top
cover of the thermostat housing, then remove the top cover.
1. Thermostat housing
2. Cooling water shunt
3. Cooling water outlet
