72 SEBU7899-05 Maintenance Section Coolant Sample (Level 2) - Obtain Place the sample in the mailing tube immediately after obtaining the sample in order to avoid contamination. i04638756 Coolant Sample (Level 2) - Obtain Never collect samples from expansion bottles. SMCS Code: 1350-008; 1395-008; 1395-554; 7542 Never collect samples from the drain for a system. Timing of the Sampling An S·O·S Coolant Analysis (Level 2) is a comprehensive chemical evaluation of the coolant. This analysis is also a check of the overall condition of the cooling system. The S·O·S Coolant Analysis (Level 2) has the following features:
Table 19 Full coolant analysis (Level 1) Identification of metal corrosion and contaminants Identification of buildup of the impurities that cause corrosion and scaling Determination of the possibility of electrolysis within the cooling system of the engine The results are reported and appropriate recommendations are made. (1) The Level 2 Coolant Analysis should be performed sooner if a problem is suspected or identified. Note: Check the SCA (Supplemental Coolant Additive) of the conventional coolant at every oil change or at every 250 hours. Perform this check at the interval that occurs first.
Obtaining the Sample Refer to Operation and Maintenance Manual, “Coolant Sample (Level 1) - Obtain” for the guidelines for proper sampling of the coolant. Obtain the sample of the coolant as close as possible to the recommended sampling interval. In order to receive the full effect of S·O·S analysis, establish a consistent trend of data. In order to establish a pertinent history of data, perform consistent samplings that are evenly spaced. Supplies for collecting samples can be obtained from your Cat dealer. Submit the sample for Level 2 analysis. For further information, refer to this Operation and Maintenance Manual, “Fluid Recommendations”.
i04240223 Coolant Temperature Regulator - Replace NOTICE Always use a designated pump for oil sampling, and use a separate designated pump for coolant sampling. Using the same pump for both types of samples may contaminate the samples that are being drawn. This contaminate may cause a false analysis and an incor- rect interpretation that could lead to concerns by both dealers and customers. SMCS Code: 1355-510 Replace the water temperature regulator before the water temperature regulator fails. Replacing the water temperature regulator reduces the chances for unscheduled downtime. Submit the sample for Level 1 analysis.
A water temperature regulator that fails in a partially opened position can cause overheating or overcooling of the engine. Note: Level 1 results may indicate a need for Level 2 Analysis. Recommended Interval Type of Coolant Level 1 Level 2 Cat DEAC Cat SCA Conventional Heavy-Duty Coolants Every 250 hours Yearly(1) Cat ELC Cat ELI Commercial EC-1 Coolants Optional(1) Yearly(1)