PUMP GP-FUEL INJECTION 1232937 - Caterpillar

Water
Distilled or deionized water is recommended for use in cooling systems. DO NOT use hard water, 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.
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 the content of the water, contact your Caterpillar dealer, your local water department, your 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 are depleted during engine operation and need to be replenished. Additives can be replenished through the addition of supplemental coolant additives (used with conventional coolants) or Extender (used with Caterpillar Long Life Coolant/Antifreeze).Nitrites or nitrite and molybdate additives protect the cylinder liner from cavitation corrosion. Nitrites are depleted, creating the need for additives or Extender. Additives and Extender also contain other inhibitors that can be depleted from cooling systems.An insufficient additive concentration does not provide adequate protection for cooling systems. An excessive additive concentration can cause additives to drop out of the solution, deposit inside the cooling system, or form a gel in the radiator. Deposits can be in the form of sludge and scale which accumulate on hot engine surfaces. Deposits reduce cooling system effectiveness, or cause water pump leaks.To maintain conventional cooling system protection, it is necessary to monitor supplemental coolant additive concentration. Maintain the proper additive levels in the cooling system.Glycol
Engine coolant glycol is normally either ethylene or propylene. Glycol raises the boiling point of water to help prevent boil-over, provides freeze protection, helps prevent water pump cavitation, and reduces cylinder liner pitting.
For ambient temperatures requiring lower freeze protection (higher than 50 percent glycol), use ethylene glycol. DO NOT use propylene glycol.
Proper freeze/boil protection requires the proper ratio of glycol and acceptable water. Use the following charts to determine glycol concentrations to mix with acceptable water. Use the 1U-7298 Coolant Tester (C) or the 1U-7297 Coolant Tester (F) to check the coolant solution periodically to ensure adequate freeze/boil protection. The refractometers give immediate, accurate readings and can be used with ethylene or propylene glycol. For more detailed specifications, refer to: Know Your Cooling System, SEBD0518, and Coolant and Your Engine, SEBD0970, or contact your Caterpillar dealer.Coolant Recommendations
Preferred - Caterpillar's Long Life Coolant/Antifreeze (LLCA).Recommended - Caterpillar's Diesel Engine Antifreeze/Coolant (DEAC).Acceptable - Any low silicate coolant that meets Truck Maintenance Council (TMC) Recommended Practice (RP) 329, TMC RP330, or ASTM D4985 requirements when used with supplemental coolant additives.Permitted - A mixture of acceptable water and a supplemental coolant additive, where freeze protection is not necessary.Unacceptable - Any high silicate coolant that is classified as meeting ASTM D3306.
Most commercial engine coolant/antifreezes are formulated for gasoline engine applications and have high silicate content. High silicates can lead to