Maintenance and Service
Shutdown for a longer period of time
7.17.1 Mercedes-Benz regulations for Diesel engine shutdown
During temporary shutdown of the machines, operated with the diesel fuel B07 (diesel
fuel with up to 7% of biodiesel content), the fuel amount control valve may become
stuck.
Actions in the event of shutdown for a period of up to 6 months
In order to avoid sediments accumulation due to 7% biodiesel content in diesel fuel,
as well as consequential damages or problems during restart, which may result from
it, the following points must be noted during the machine shutdown additionally to the
actions pointed out in the Mercedes-Benz operating manual:
– Let the diesel engine run monthly for approx. 10 minutes at max. 900 rpm, with the
air conditioning and heating switched on.
– Always by all means check engine oil level and coolant level before start. Addition-
ally, drain the water separator on the diesel engine and fuel prefilter.
– Always by all means monitor the oil pressure as well as coolant and oil temperature
when starting or while the diesel engine is running.
ADVICE
The monthly diesel engine start is not required if the engine has been operated and
shut down with FAME-free fuel (B0-diesel fuel). If the engine system has been oper-
ated previously with the standard diesel fuel according to DIN EN 590 with 7 % of
bio-diesel content, it is sufficient to pump out all the remaining fuel from the tank and
fill it with B0 fuel. Before shutdown the engine system must be operated for at least
30 min. with this fuel, to flush all the fuel-carrying components.
The B0 requirement is currently met by, for example, the fuels Aral Ultimate Diesel and
BP Ultimate Diesel.
In the case of a shutdown for longer than 6 months, further actions are required.
Please contact an mtu partner or mtu authorised Mercedes-Benz service centre for
details.
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