VOLUME COMPRESSOR 4B1856 - Caterpillar

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 incorrect interpretation that could lead to concerns by both dealers and customers.
Note: Level 1 results may indicate a need for Level 2 Analysis.
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(1) Coolant sampling valveObtain the sample of the coolant as close as possible to the recommended sampling interval. To receive the full effect of S O S analysis, a consistent trend of data must be established. To establish a pertinent history of data, perform consistent samplings that are evenly spaced. Supplies for collecting samples can be obtained from your Caterpillar dealer.Use the following guidelines for proper sampling of the coolant:
Complete the information on the label for the sampling bottle before you begin to take the samples.
Keep the unused sampling bottles stored in plastic bags.
Obtain coolant samples directly from the coolant sample port. You should not obtain the samples from any other location.
Keep the lids on empty sampling bottles until you are ready to collect the sample.
Place the sample in the mailing tube immediately after you obtain the sample to avoid contamination of the sample.
Never collect samples from expansion bottles.
Never collect samples from the drain for a system.Submit the sample for Level 1 analysis.Refer to the following publications for S O S information:
Operation and Maintenance Manual, "S O S Information"
Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations"
Special Instruction, PEHJ0191, "S O S Fluid Analysis"
Special Publication, PEGJ0046, "S O S Services: Understanding Your Results"