Maintenance and care
31
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
consequences up to severe engine dam-
age, 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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