Instructions for heavy fuel Operation
Care and supervision / Engine fuel
A3.04.07.01
M20/M282/M332C/M452/M453C/M551/M552C/M601/M601C
en / 19.08.1996 BA000010 2/4
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1. Storage tank
When fueling, only empty storage tanks are to be used. This is to avoid segregation or the
consequences of any incompatibility that may occur when taking on different types of fuel. If a
plant has no bunker heating, the HFO pumpability must be guaranteed by the supplier or
check the setting point by cooling (in a refrigerator).
2. Settling tank HT5, HT6
Emulsions are normally broken up under temperature influence in a settling tank, and a part
of the water and heavy contamination are separated from the fuel as sludge.
Two settling tanks have provided for HFO-operation and each one has been designed for a full
load operation of 24 hours.
• Connect the tanks alternately irrespective of the fuel consumed so as to obtain the best
settling effect possible.
• Before cutting a tank in, thoroughly remove any water and sludge.
The longer the fuel remains in the settling tank, the more contaminants and water will be
deposited.
During operation, the set temperature of the tank should be between 80 - 90 °C.
3. Separator HSD1, HSD2
The separators have the most important task in the fuel treatment. They lower the content of
solids and water to the minimum that can be technically reached.
• Both separators are to operate independently of the manufacturers/system.
• The operational capacity is designed according to the rules and regulations of the
individual manufacturer, whose authorized department has coordinated the design with
Caterpillar / MaK-Kiell.
Separation temperature 98 °C.
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