Callesen Diesel Page 9 of 12 Sheet No. 7-94-2A
The fuel filters should be cleaned at suitable intervals, about every six months or when necessary,
and when the inserts are too poor they should be replaced. A set of filters should always be kept in
reserve. This is very important as poor filters may damage pumps and injectors.
Normally, the injectors are checked once a year (provided that the engine is running satisfactorily)
and the pressure adjusted at the same time. They are to be adjusted at 240 kp/cm² by hand-
pumping. At the same time the injector filters must be cleaned.
If the engine has been disassembled for inspection, a trial run is necessary to ensure that everything
is in good order.
When the engine is installed in a wooden vessel, the alignment of the engine should be checked
every year and, in any case, when heating begins at the inner stern bearing. Alignment is very easy
to carry out. There are four threaded holes in the foundation, one in each corner. The engine can be
set up here and alignment plates placed below the engine.
WORKING TROUBLES
START:
If the engine does not work after having been put in starting position and the starting valve has been
opened, the cause may be:
1. There is no air or insufficient pressure in the starting air receiver; the pressure should be at least
22-25 kp/cm². Maybe the valve is opening too slowly or too little
. The manometer readings may
be wrong.
2. The air pipes from the receiver starting valve to the engine starting valve may be clogged or dis-
connected. Maybe the starting air pipe to the air distributor cover or the air distributor ducts are
clogged by soot.
3. Water in the starting air receiver. Water should be drained off the receiver about twice a year.
4. The starting valve does not open (remember lubricating). If the starting valve is sticking, it can be
loosened by pouring a little oil onto the piston after having removed the large fitting; by means of
the tools delivered operate the valve until it comes back again quite easily when being pressed
downwards. See sheet 7-203 (7-60) under starting air system.
5. The automatic starting valve disc in the air distributor may have been displaced half a turn after
dismounting. Perhaps the driving pin is broken. Adjustment of disc valve see sheet 7-63 under
starting air system.
6. The valves are hanging or leaking (regarding valve grinding see under cylinder cover sheet 7-6);
perhaps the pistons should be drawn and cleaned because the piston rings are sticking (coking).
This is usually the case when the engine runs 1-1½ turn and then stops. Instructions for drawing
of pistons are indicated under crank and piston, sheet 7-230 (7-14a).
The faults have to be located and remedied.
When the engine at start is turning round but does not ignite, the cause may be:
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