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cation need additional antifreeze protection (arctic conditions), please contact your Kohler Co.
representative for additional information.
Coolant monitoring
Kohler recommends a close monitoring of the coolant to prevent diesel engine damage by cavi‐
tation, corrosion, overheating, or freezing. Monitoring of the coolant can extend the exchange
period of the fluid for up to 6000 hours or 4 years for SI-OAT-based and hybrid technology cool‐
ants.
Kohler recommends the following list of parameters to be checked by coolant analysis at least
once a year. However, the user should always check with their coolant provider what the
recommendations for analysis and monitoring of their coolant are, according to engine oper‐
ating conditions.
Information
Topping up the cooling system with inadequate water or non-compatible coolant mixtures can
lead to precipitation in the fluid and malfunction of the engine.
Parameter
Visual appearance / color
Water hardness
Nitrate / Nitrite
pH value
Glycol
Pour point
Freezing point
Bacteria
Additive elements
(B, Ba, Ca, K, Mg, Na, P, S, Si)
Wear elements
(Al, Cr, Cu, Fe, Mg, Mo, Ni, Pb, Sn, Ti, V)
Contamination
(Ca, Mg, Mo, Si, Sn, Zn)
Corrosion copper
Corrosion steel
Tab. 53: KD coolant analysis parameters
Keeping the cooling system clean
Usually, cleaning the cooling system is not necessary.
In case of contamination with bacteria, fungi or yeast, a mixture of fresh coolant added with
biocides is suitable. The following products are approved:
KD62V12A 33521061401_1_1 EN_US
2023-10
Unit
-
mmol/l ( ppm)
-
-
%
°C ( °F)
°C ( °F)
count
mg/kg ( ppm)
mg/kg ( ppm)
mg/kg ( ppm)
-
-
© 2023 by Kohler Co. All rights reserved.
Maintenance
Lubricants and operating fluids
Method
Visual
EN/ISO 11885
EN 12014
EN/ISO 10523 ASTM D1287
DIN 51375
ISO 3016 ASTM D5985
ISO 3013 ASTM D1177
-
DIN 51399
DIN 51399
DIN 51399
EN/ISO 2160
ISO 7120
191
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