Maintenance and care
35
D Drain the pickling fluid and thoroughly
flush the system with tap water
D If necessary, refill the circuit again with
fresh pickling fluid and pickle the en-
gine for another 8 hours
D Drain the pickling fluid, fill the system
with tap water, and run the engine at
idle for 5 minutes to flush out all fluid;
then drain the water
D Fill the system with a 1% soda solution.
Drain the soda solution after running
the engine at idle for 5 minutes, and
flush with tap water until the discharg-
ing water is clear
D Fill cooling circuit with a mixture of po-
table tap water and anti-freeze with at
least 40% by volume, refer to Publica-
tion ”Fuels, Lubricants ...”
Note:
Older radiators may develop leaks when
such deposits are removed. The surge
tank should be filled only up to the bottom
edge as otherwise foaming will cause the
pickling fluid to spill over.
Filler caps and working valves of cool-
ing system
The rubber gaskets of the filler caps and
working valves (negative pressure and
positive pressure valves) of the cooling
system are subject to natural aging.
To preclude leakages in the cooling sys-
tem and tailing pressure drop and its con-
sequences up to severe engine damage,
renew the filler caps and working valves in
line with the change of coolant (every two
years at the latest).
Waste water treatment
Drained and spent cleaning and pickling
fluid should be brought up to a pH value
of 7.5 to 8.5 with the aid of caustic soda.
Once the precipitation has settled to the
bottom of the container the clear fluid
above can be dumped into the sewer. The
sludge at the bottom should be taken to a
special waste dump. Anyway, it is recom-
mended to consult the local authorities for
more information about waste water rules
or restrictions.
Sources of supply for pickling fluids
Lithsolventsäure
Keller & Bohacek
Liliencronstr. 54
D-40472 Düsseldorf
Phone: (02 11) 96 53 0
Motor pickling fluid RB-06
Reincolor-Chemie GmbH
Werkstr. 21
D-90518 Altdorf
Phone: (0 91 87) 97 03 0
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