Callesen Diesel Page 7 of 12 Sheet No. 7-94-2A
As mentioned before, the engine has been adjusted by the factory to be able to yield about 5%
above the stated output. This overloading possibility is intended as a reserve for a few very special
occasions, and it is not wise to make use of it under normal conditions! It is therefore recommended
never to load the engine plant more than always to leave about 1-2 mm free before the toothed rods
of the fuel pumps are fully against the blocking piece of the governor.
Before stopping the engine after use, check whether there is sufficient air in the starting air vessels
(about 30 kp/cm²). When charging, the shut-off cock on the air vessel should be screwed completely
up against the blocking. Thus, air access to the spindle is being blocked, thereby preventing wear.
The grease nipple on the propeller shaft must be filled at least once a week to keep the packing
round the pull rod tight and at the same time to keep the grease in the propeller. If water is coming
out near the flange coupling, the pull rod should be repacked.
During periods of hard frost or when drop of temperature may cause risk of ice formation, anti-freeze
mixture can be filled on the freshwater system of the engine in the proportion indicated on page 7-
55. Then it will only be necessary to drain the seawater system, i.e. piston pumps and cooler with
associated piping. In case the freshwater system is drained, make sure that all water is drained off
the engine as well as the cooler and centrifugal pump.
As long as the engine is running satisfactorily, avoid disassembling anything, and in case there are
problems beyond what must be considered normal, which might need readjustment, you should call
in a skilled man.
If the engine is cared for and attended to as mentioned above, it will usually not require much
maintenance but you must always be sure that you are in a position to help yourself in an emergency
case requiring the use of the spare parts supplied with the engine. Therefore, these spare parts
should always be in good order and kept in an easily accessible place, where they are not exposed
to rust or other kinds of damage.
Whenever some of the parts have been used, the stock should always be completed as soon as
possible for use at later emergencies.
INSPECTION AND CONTROL
As mentioned before, do not tamper with the engine as long as it is in good order and running satis-
factorily.
However, it is necessary to exchange the lubricating oil about every 1500-1800 working hours, or ap-
proximately twice a year. Before draining off the oil, run the engine warm until the oil is thin. The
draining is done by opening the large cock on the oil container; at the same time empty the filters by
opening the air screws and removing the bottom plugs. If the filter inserts are not comparatively new,
they should be replaced at the same time. Concerning oil quantities, see sheet 4-68.
The clutch oil should be replaced after about 5000 working hours, however, at least every 2 years.
The turbocharger oil should be exchanged every 1000 working hours.
The pistons should not be drawn unless the oil consumption becomes too high. Then the oil control
rings and probably also the compression rings should be replaced.
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