Maintenance and Service
Diesel engine
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7.1.3.4 Microorganisms in the fuel system
Occasionally, at first inexplicable blocks in the fuel system are found. These blocks
are often caused by microorganisms.
These microorganisms (bacteria, fungi, yeast) can grow rapidly under favourable for
them conditions. Water, which as condensing water is found in every storage or vehi-
cle (fuel) tank, and vital elements in chemically bound form, like sulphur, phosphor,
nitrogen, oxygen and trace elements are necessary for growth. Fuel additives may
also contribute to microorganisms' growth.
Depending on the temperature, growth is more or less strong, which leads to the for-
mation of fibrous mushroom meshes (mycelium) and sludge. The consequences are
blocks of the fuel prefilter by rust and fibres (mycelium) and frequent filter exchange. It
leads to a power losses of the engine and in extreme cases to breakdown of the vehi-
cle.
Remedial measures
If infestation with microorganisms is found in storage or vehicle (fuel) tanks, then we
recommend the following disinfecting agents to fight it:
Product: GrotaMar 82 ROPA item no. 435060 (1.0 l)
Manufacturer: Schülke & Mayr
D-22840 Norderstedt
Phone: +49(0)40 52100-0
Fax: +49(0)40 52100-244
Internet: www.schuelke.com
E-mail: sai@schuelke.com
In case of need, please contact the manufacturer (for instance to enquire about
sources abroad). Consumption - 0.5-1.0 l per 1000 l of diesel fuel.
7.1.4 Cooling system diesel engine
All coolers must be regularly checked for cleanliness and cleaned.
If the admissible maximum temperature is repeatedly exceeded during very high envi-
ronmental temperature (see page 140) the complete cooling system must be checked
for cleanliness and, in case of need, be immediately cleaned.
Always make sure that the air intake grids are free of dirt or adherent leaves, etc.
When performing cleaning work on the air intake grids or on the coolers, always
switch off the engine and secure it against inadvertent starting (pull off the ignition
key). In case of problems with one cooler, always also clean all other coolers/radia-
tors.
WARNUNG
Poisoning hazard and hazard of damage to the skin!
Corrosion protection and antifreeze agents contain hazardous materials There is an
acute poisoning hazard when swallowing. In case of contact to the skin, irritation or
cauterization/burns may occur.
– Never fill corrosion protection/antifreeze agents into drinking vessels or beverage
bottles.
– Always store these agents so that children do not have access to the agents.
– In any case, comply with the instructions on safety of the manufacturer of these
agents.
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