Service Manual

Table Of Contents
4
4.3 Coolant
Consumables
25
General
In liquid-cooled engines, the coolant must be
conditioned and monitored because otherwise
the engine could be damaged.
z
Corrosion
z
Cavitation
z
Freezing
Water quality
The right water quality is important for conditio-
ning the coolant. Clear, clean water within the
following analysis values must always be used:
Information about the water quality is available
from local waterworks. A test case can be re-
quested from your DEUTZ partner under the
order for checking your water quality (order no.
1213 0382).
Analysis values min. max.
ph-value at 20 °C 6,5 8,5
Chloride-ion content [mg/dm³] - 100
Sulfate-ion content [mg/dm³] - 100
Total hardness
1)
1)
Carbonate hardness proportion of the
total hardness min. 3 dGH
[°dGH] 3 12
The water must be conditioned in case of devi-
ations in the analysis values.
z
pH value too low:
Add diluted caustic soda
or potassium soda. Small test mixtures are
recommended.
z
Total hardness too high:
Mix with softened
water (pH-neutral condensate or water sof-
tened by ion exchanger)
z
Total hardness or carbon hardness too
low:
Mix with harder water (harder water is
usually available in the form or drinking wa-
ter)
z
Chloride and or sulphates too high:
Mix
with softened water (pH neutral condensate
or water softened by ion exchanger)