MAK M20, Operating Instructions Manual

Page: 358 / 456

Abgasturbolader
Maintenance / Cleaning
A5.05. 06.13.01.06
300
M20
en / 03.02.1998 IB004495 1/2
06
Ĺ
See also:
Spare parts list: B1.05.06.n.7259
Time requirement: 1 Pers./ 0,50 h
Personnel qualification: skilled engine hand
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Operating medium: Heavy fuel and distillate fuel
Maintenance:
Cleaning of the turbocharger every 300 h
Note:
Particularly if the engine is running on heavy fuel, deposits will settle down on the turbine
blades decreasing the charger efficiency and increasing the bearing loads by unbalance.
These deposits must be removed by injecting fresh water (without addition of detergents
or solvents). The washing intervals depend on the fuel quality and the operating
conditions, and they can only be fixed by experience in operation.
It must be absolutely prevented that water enters the exhaust manifold between the
washing operations. For this reason, the hose piece (
Fig.1 /1) is to be removed after
washing.
Sequence of operations:
1. Cleaning
1.1 Connect the cleaning pipe (2) with the
water supply (detachable hose clip (1)
with stop valve [3]).
1.2 Open drain valve ( Fig.2 /1)öffnen.
ĭ
Warning for safety reasons!
Attention, danger of burning!
The waste water runs off with a tempe-
rature of > 70 °C.
1.3 Reduce engine output to 20 %,
exhaust gas temperature after cylinder
280 - 300 °C
.
2
4
4
4
1
5
3
1