Maintenance and Service
Diesel engine
7.1.4.4 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 or 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 reduced performance of the diesel engine and, in extreme cases, to break-
down of the vehicle.
Remedial measures
If infestation by microorganisms is detected in storage or vehicle tanks, we recom-
mend the following disinfectant against it:
Product: GrotaMar 82 ROPA item no. 435006000 (1.0 l)
Manufacturer: Schülke & Mayr
D-22840 Norderstedt
Phone: 040/52100-0
Fax: 040/52100-244
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.
7.1.5 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 168) 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 cleaning the air intake grids or the coolers, always switch off the diesel 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/radiators.
WARNING
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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