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Using water that meets the minimum acceptable water requirement may not prevent drop-out of these chemical compounds totally, but should minimize the rate to acceptable levels.To determine water characteristics, contact local water department, agricultural agent or an independent laboratory to perform the testing service. Two companies are listed below. However, there are others who are qualified to provide this service.L.O.C.C. Corp.
905 Bayshore Drive
Coos Bay, OR 97420
Ph. (503) 267-4904
NALCO Chemical Co.
Naperville Technical Center
One Nalco Center
Naperville, IL 60566
Attn: Sample Receiving
Ph. (312) 961-9500
Antifreeze
Caterpillar recommends that the coolant mix contain a minimum of 30% Caterpillar Antifreeze, or equivalent and acceptable water to maintain an adequate water pump cavitation temperature for efficient water pump performance. Premix coolant solution to provide protection to the lowest expected outside (ambient) temperature. Pure undiluted antifreeze will freeze at -10°F (-23°C).Only use a greater concentration (above 30%) of Caterpillar Antifreeze as needed for anticipated outside (ambient) temperatures. Do not exceed a coolant mixture of 60% antifreeze to water since a concentration above 60% antifreeze will reduce the engine's freeze protection and increase the possibility of deposit formation in the cooling system.
Use Caterpillar Antifreeze or ASTM D4985-89 (GM Specification 6038-M) Antifreeze. Caterpillar Antifreeze is available through your Caterpillar dealer in quantities that follow. Most commercial antifreezes are formulated for gasoline engine applications and will, therefore, have high silicate content. Caterpillar Antifreeze is formulated with a low silicate content and the proper coolant additives for heavy duty diesel engines.ASTM D4985-89 (GM Specification 6038-M) is a low silicate antifreeze, but supplemental coolant additive must be added.The major advantages of Caterpillar Antifreeze are: * Significantly reduces water pump seal leakage problems caused by excessive concentration of chemical additives.* There is no need to add supplemental coolant additive on initial fill which must be done with current commercially available antifreezes.* High silicate antifreezes used with a supplemental coolant additive can cause a build-up of solids over a period of time which can cause plugging, loss of heat transfer, and water pump seal damage. Make proper antifreeze additions.Adding pure antifreeze as a makeup solution for cooling system top-up is an unacceptable practice. It increases the concentration of antifreeze in the cooling system which increases the concentration of dissolved solids and undissolved chemical inhibitors in the cooling system. Add antifreeze mixed with water to the same freeze protection as your cooling system.Use the chart below to assist in determining the concentration of Caterpillar Antifreeze to use.
5P0957 Coolant Tester (°F) or 5P3514 Coolant Tester (°C)Both are available at your Caterpillar dealer.Check the coolant solution frequently in cold weather for glycol concentration with the 5P0957 or 5P3514 Coolant Tester to ensure adequate protection. Both testers are identical except temperature scale. They give immediate, accurate readings and can be used for antifreeze/coolants that contain ethylene or propylene glycol.If propylene glycol based antifreeze is used, DO NOT allow concentration greater than a 50/50 antifreeze to water mixture. The measurement of freeze protection must be made with a refractive-type tester (Cat 5P0957 or 5P3514) rather than a hydrometer-type, which can