COVER AS-FILTER 3997832 - Caterpillar

Caterpillar's Scheduled Oil Sampling (S O S) Program is a series of diagnostic tests designed to identify and measure contamination and condition of oil in an engine's crankcase. S O S incorporates three basic tests: WEAR ANALYSIS which identifies and measures the amount of wear particles in the oil. These wear particles are then compared against established Caterpillar norms to determine acceptability. CHEMICAL and PHYSICAL TESTS which detect the presence of water, fuel and antifreeze in the oil. If these items are found, their concentrations are compared against Caterpillar established maximum limits. OIL CONDITION ANALYSIS which identifies and measures the amount of contaminants such as soot, sulfur, oxidation and nitration products. This test can also be used to customize (reduce, extend or maintain) oil change intervals. Caterpillar's S O S Program is a good indicator to identify what is taking place inside the engine structure. An early warning of unacceptable oil contamination can save considerable expense in engine repairs. To be effective as an indicator, S O S must be performed on a continuing basis. Intermittent sampling will not allow wear rate trend lines to be established for a particular engine, which makes identifying the best time to overhaul an engine virtually impossible. Consult your Caterpillar dealer for complete information and assistance in establishing an S O S Program for your engine.