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General • Inspections

Caterpillar 3520C Oil Sampling Procedure

Proper oil sampling is critical for monitoring engine health and detecting early signs of wear, contamination, or emerging failures. By following this procedure—using clean sampling tools, purging lines, labeling bottles correctly, and shipping samples promptly—maintenance teams can rely on the lab results to make informed decisions, prevent catastrophic failures, extend engine life, and plan repairs before unplanned downtime occurs.
[CAT] Onslow - Captis Energy
12/03/2025

Caterpillar 3520C Oil Sampling Procedure

This procedure outlines the steps for collecting, labeling, and shipping oil samples from a Caterpillar 3520C engine. It includes preparation, collection, labeling, shipping, and analysis review to ensure accurate and timely oil sample results. Following a proper procedure while taking oil samples is crucial to achieve accurate oil sample results. These results provide valuable information regarding the health of the equipment, while also showing any potential upcoming issues that can lead to catastrophic failures. Timely and proper oil sample collection is essential to ensuring accuracy in the resulting analysis to make prompt and accurate corrective action on effected equipment.

    Preparation

    Ensure all required PPE is worn

    • CAT3520SampleProbe.jpg

    Oil Sample Collection

    Warning: Oil being discharged from the sampling hose will be hot!

    • CAT3520OilSamplePort.jpg
    • CAT3520OilSamplePort2.jpg

    Oil Sample Labeling and Shipping

    Enter sample identification #

    Engine hours

    Meter name
    Unit

    Was engine serviced prior to sampling?

    • Yes
    • No
    • N / A
    • CAT3520OilSampleBag.jpg

    Signature:

    Click here to sign
Source: [CAT] Onslow - Captis Energy (Community Member)

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