Callesen Diesel Page 2 of 12 Sheet No. 7-94-2A
In case the unions in the top of the fuel pumps have been loosened, these should not be retightened
too hard as the pumps may hereby be deformed, with the result that the regulating rods will go too
tight and the engine will not regulate very well.
Open the decompression cocks on the cylinder heads and turn the engine to top dead centre 1
(foremost cylinder); ensure that the fuel pump piston is lifted at the same time; if not
, turn the engine
another revolution (as it is a 4-stroke engine, the camshaft is only turning one revolution every time
the crankshaft is revolving twice).
Now check whether the vent screws on the nozzle holders are tightened up and adjust the governor
handle to about 225 revolutions. Thereafter advance the regulating rods in the fuel pumps to the
maximum position. Thereafter, turn the flywheel backward and forward above "Top 1" about 20-30º
to each side, until a crackling sound is heard from the nozzle, indicating that the oil is spraying
through.
Exactly the same procedure is carried out for each of the other cylinderes, and when the fuel oil has
been pumped through and the engine hereby has been turned at least about 10 turns, having
pumped pressure on the lubricating oil system by the handpump to distribute the lubricating oil in
bearings and cylinders, the engine is ready for start.
When the governor handle has been adjusted to lowest revolution number, the regulating rods of the
fuel pumps should be able to be moved quite easily backward and forward. Any paint or rust-
protecting agent must be carefully removed and the regulating rods well greased.
After charging the starting air vessel to a minimum of 25 and a maximum of 30 kp/cm² (NOTE! USE
ONLY COMPRESSED AIR. OXYGEN MUST NOT BE USED IN ANY CIRCUMSTANCES AS AN
EXPLOSION WOULD BE INEVITABLE, EXPOSING EVERYBODY NEAR THE ENGINE TO
GREAT DANGER) turn the engine so that the mark "Start" on the flywheel is in top position and at
the same time check whether the fuel pump piston in the aftermost pump is in top position; if not,
turn the engine another turn. Engines with 4, 5, 6 and 8 cylinders need no turning. Before starting,
check whether the seacock is open and whether the clutch is free. Close the decompression cocks
as well as the charging valve in the aftermost cylinder cover and adjust the governor handle to about
225 revolutions.
Lubricating oil system - Start
Now pump pressure on the lubricating oil system (
should always be remembered before
starting) and start the engine by quickly turning the handle of one of the main shut-off valves at the
end of the starting air receivers about 1 turn to the left. As the engine is supplied with automatically
controlled starting valve in all cylinder heads, it will go on running on air as long as the shut-off valve
is kept open. As soon as the engine is firing, the shut-off valve is closed and under normal conditions
the shut-off valve is not kept open for a longer period than to use 2-3 atm. air for each start. At start,
a hissing sound is heard from the air distributor at the front of the camshaft. This is only the air
pressure which is closed by the starting valve.
As soon as the engine has been started, check immediately whether there is pressure on the lubri-
cating oil system. Normally, the engine is equipped with a pressure control which has to be con-
nected to an alarm device (bugle, bell, lamp or the like) which gives a warning when the lubricating
pressure for some reason is dropping below 0.5 kp/cm² or fails to appear.
To Next Page
Loading...
