COVER AS-PUMP 1276356 - Caterpillar

General Coolant Information
Several industry sources claim that forty percent of all engine failures are due to cooling system problems. Many of these failures could be avoided with proper cooling system maintenance. Cooling system maintenance is as important as fuel and lubricating system maintenance. Coolant quality is as important as the quality of fuel and lubricating oil.The three main coolant functions provide:* adequate heat transfer and anti-boil protection,* cavitation erosion and corrosion protection,* anti-freeze protection.Coolant is normally composed of three elements:* Water* Additives* GlycolA brief discussion of each of these elements follows.Water
Distilled or deionized water is recommended for use in cooling systems. DO NOT use hard, tap water or salt softened tap water in engine cooling systems. If Distilled or deionized water is NOT available, use water that meets the Minimum Acceptable requirements listed in the following chart.
ppm=parts per million
Water that does not meet the Minimum Acceptable limits will reduce engine service life when used in cooling systems.
If you are not sure of your water's contents, contact your Caterpillar dealer, your local water department, agricultural agent, or an independent laboratory to analyze the water.Additives
Additives must be included in all coolant mixtures. Additives help prevent the formation of rust, scale and mineral deposits. Additives protect metals from corrosion, prevent liner cavitation, and contain anti-foaming agents. Additives deplete during engine operation and need to be replenished. This is done through the addition of supplemental coolant additives (SCAs, with conventional coolants) or Extender (with Caterpillar