ELBOW 3411416 - Caterpillar

Select the "START" button when you are ready to start the measurement. If you need to abort the measurement, click the "STOP" button.
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Illustration 47 represents a particle count run. A run is comprised of ten particle count measurements. The PMA software will save the particle count run as one computer file. The PMA software will save the file to the hard drive (C:\PMA\).Operating the Particle Counting and the Kidney Loop Process during the Dyno Test
Hot oil and components can cause personal injury.Do not allow hot oil or components to contact skin.
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Engine dyno test cycle with particle counting and kidney looping processes.
Engine failure may occur while an engine is operating under heavy load. This failure may cause the engine to self-destruct and produce flying objects. To prevent personal injury or death, do not enter the engine room while the engine is under heavy load.
Illustration 48 is a typical engine dyno test utilizing the particle counting and kidney loop filtration processes. During the engine dyno test, the engine operates through low idle (15 minutes), 1/4 load (15 minutes), full load (60 minutes), and low idle cool down (15 minutes). The two graphs show how the dyno test, particle counting, and kidney looping function together. In this example, the particle count run is 15 minutes in length. A typical engine dyno test will have seven run computer files. Refer to the Particle Counter (On-line) operation graph for more detail on this subject. The particle counting process is designed to run continually during the dyno test.Note: Caterpillars rebuilt engine roll-off target is ISO 18/15 after dyno test is complete.
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Example of a normal engine particle count.
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Example of a contaminated engine particle count.
The dyno operator will quickly learn to read the particle data. Illustration 49 and Illustration 50 are two examples of rebuilt engine particle counting data. Illustration 49 is a typical engine particle count. Notice the shape of the bar chart. This chart shows normal rebuilt engine particle count data. Illustration 50 is of a rebuilt engine that had a contaminated engine oil cooler. Notice the elevated bar on the right side of the chart. These particles are larger and the counts are too high. This engine was removed from the dyno and inspected to determine the cause of the elevated particle counts.
The kidney loop process is only run twice, once near the beginning of the dyno, at the 10-minute mark to the 20-minute mark. The kidney loop process will remove most of the contamination that was left in the engine from the rebuild. The second time is at the 90-minute to 105- minute mark during the cool down phase. This process is designed to remove any contaminates that are the result of the engine rebuild process or from the engine break-in process.Cleaning the Particle Counter
Flushing the Particle Counter
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Cleaning procedure.Illustration 51 diagrams how to assemble the hoses during the cleaning procedure.
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Switch position Black = LP for cleaning.
Reverse the particle counter flow by switching to Black = LP.