Running-in
Engine
A3.10.01.00
M20-M601C
en / 26.03.2001 BA000126 1/1
Ĺ
Running-in
All engines leaving our works have been fully run in, thus no further running in instructions are
required.
In the case of certain repairs however, such as reconditioning work on pistons (A5.05.02.10.01.nn),
piston rings (A5.05.02.07.01.nn) and cylinder liners (A5.05.03.04.02.nn), as is pointed out on the job
card in question, the following instructions must be observed:
• When the engine has been preheated, start at 20 % rated power and then go to full power
within the time provided for each type of engine:
M 20, M 282, M 332 C 6 h
M 25, M 32, M 453 C 8 h
M 552 C, M 601, M 601 C 8 - 10 h
M 43 10 h
If a heavy fuel engine is to be run in again and is operating between 20 % and 50 % of the rated
power, the fuel should be of the distillate variety because of the higher production of combustion
residues at part load (A3.06.
18.nn).
While increasing the power, compare the pressures and temperatures with the figures on the
exceptance test records A1.10 to assess the engine working conditions.
No running-in instructions need to be followed when repairs have been carried out on the main and
big end bearings.
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