Deutz TCD 2013 L04 4V, Operation Manual

Page: 37 / 80

Coolant
Operating media
© 2007 37
4
General
In liquid-cooled engines, the coolant must be condi-
tioned and monitored, otherwise the engine could be
damaged by:
z
corrosion
z
cavitation
z
freezing
Water quality
The right water quality is important for conditioning
the coolant. Clear, clean water within the following
analysis values should always be used:
Specifications of the water quality are made by the
local water board.
The water must be conditioned if it deviates from the
analysis values.
z
pH value too low:
Addition of diluted sodium or potassium lye.
Small trial mixtures are advisable.
Never operate the engine without coolant
(even for a short time)!
Analysis values min max
ph value at 20 °C 6,5 8,5
Chloride ion content [mg/dm
3
] - 100
Sulphate ion content [mg/dm
3
] - 100
Total hardness
(carbonate hardness
percentage of the total
hardness min. 3 dGH) [°dGH] 3.0 12.0
z
Total hardness too high:
Mixing with softened water (pH neutralized con-
densate or water softened by ion exchanger).
z
Total hardness or carbonate hardness too
low:
Mixing with harder water (harder water is usually
available in the form of drinking water).
z
Chlorides and/or sulphates too high:
Mixing with softened water (pH neutralized con-
densate or water softened by ion exchanger).
Cooling system corrosion protection
agent
The conditioning of the coolant for liquid-cooled
DEUTZ compact engines is performed by mixing an
anti-freeze with corrosion protection inhibitors based
on ethylene glycol into the water.
This cooling system corrosion protection agent is
Health damaging nitrous amines form
when nitrite-based cooling system corro-
sion protection agents are mixed with
amine-based agents!
Cooling system corrosion protection agents
must be disposed of in an environmentally
friendly way.
DEUTZ cooling system corrosion protection
agent
Container Order number
5 litre container 0101 1490
20 litre container 0116 4160
210 litre barrel 1221 1500
free from nitrite, amine and phosphate and is adapt-
ed to the materials in our engines. Order from your
DEUTZ partner.
Please contact your DEUTZ partner if the DEUTZ
cooling system corrosion protection agent is not
available.
The cooling system must be monitored regularly.
This also includes checking the coolant system cor-
rosion protection agent concentration in addition to
checking the coolant level.
The cooling system corrosion protection agent con-
centration can be checked with conventional test in-
struments (e.g. refractometer).
At temperatures below -35 °C, please contact your
responsible DEUTZ partner.
It is possible to use other cooling system corrosion
protection agents (e.g. chemical corrosion protection
agents) in exceptional cases. Consult your DEUTZ
partner.
Cooling sys-
tem corrosion
protection
agent percent-
age Water percent-
age Cold protec-
tion up to
min. 35 % 65 % -22 °C
40 % 60 % -28 °C
max. 45 % 55 % -35 °C
OBJ_DOKU-12638-001.fm Seite 37 Mittwoch, 22. August 2007 9:25 09