Kohler KD62V12 Operation And Maintenance Manual page 130

Maintenance
Lubricants and operating fluids
Corrosion inhibitor antifreeze ratio and water quality are determinant factors Coolants containing
unsuitable corrosion-inhibiting antifreeze products or which have not been prepared properly can
cause the failure of components and parts in the coolant circuit as a result of cavitation or corrosion
damage.
In addition, deposits with thermal insulation properties can build up on components that conduct
heat, leading to overheating and ultimately to failure of the engine.
The cooling system only operates reliably under pressure. Keep the cooling system clean and
sealed.
The cooling sealing and operating valves must function correctly. Maintain the required coolant
level.
Corrosion inhibitors
NOTICE
Corrosion inhibitors has to insufficient cavitation protection and lower boiling point limit.
Property damages by cavitation, corrosion or overheating.
u Corrosion inhibitors are forbidden on KOHLER engines.
Fresh water requirements
NOTICE
Using inadequate water could alterate the coolant properties and deposit impurities in the cooling
circuit.
Property damages by cavitation, corrosion or overheating.
u Use recommended water. Drain and flush cooling system if required.
NOTICE
Refilling with inadequate water or coolant mix could lead to precipitation of antifreeze product and
impurities in the cooling circuit.
Property damages by contamination or overheating.
u Use recommended water or coolant mix.
u By precipitation, replace the cooling circuit.
Kohler Co. recommends to use:
– Fully deionized water
– Corresponding to the 2006 WHO (World Health Organization) guideline for drinking water
By missing water analyses or proven water quality, switch to deionized water or reversed
osmosis water.
Ask for water analyses at the relevant local authorities.
Sea water, brackish water, salt water and industrial waste water are not suitable.
Requirement
Water hardness
pH-Value at 20 °C (68 °F)
Chloride (ions)
Sulphate
Bacteria and toxic constituents Without
130
Value
maximum 2.14 mmol/dm
6,7 to 9,0
maximum 100 mg/dm
maximum 100 mg/dm
© 2019 by Kohler Co. All rights reserved.
Operation and Maintenance Manual
3 (214 ppm) with maximum of 12°dH
3 (100 ppm)
(100 ppm)
3
KD62V12 33521030301_6_1 EN_US
2019-02