| Sampling Practice Recommendations |
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| Category | Component | Test Kit | Interval | Comments |
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| Engines | Diesel | MOB 1 | 1 mon / 250 hr | MOB 1 kit for routine analysis, MOB 2 for extended drain interval testing (includes TAN test to monitor oil degradation). |
| | Natural Gas | MOB 1 | 1 mon / 250 hr | " |
| | Gasoline | MOB 1 | 1 mon / 250 hr | WC-INS kits must be purchased for warranty/insurance claims. |
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| Transmission | Manual | MOB 1 | 4 mon / 1000 hr | Routine analysis kits. |
| | Automatic | MOB 1 | 4 mon / 1000 hr | " |
| | Power Take-Off | MOB 1 | 4 mon / 1000 hr | " |
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| Power Trains | Differential | MOB 1 | 4 mon / 1000 hr | Routine analysis kits. |
| | Planetary | MOB 1 | 4 mon / 1000 hr | Routine analysis kits. |
| | Final Drive | MOB 1 | 4 mon / 1000 hr | Routine analysis kits. |
| | Gearbox | MOB 1 | 4 mon / 1000 hr | Routine analysis kits. |
| | Funk Drive | MOB 1 | 4 mon / 1000 hr | Routine analysis kits. |
| | Swing Drive | MOB 1 | 4 mon / 1000 hr | Routine analysis kits. |
| | Travel | MOB 1 | 4 mon / 1000 hr | Routine analysis kits. |
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| Hydraulic Systems | Power Packs | MOB 2 | 2 mon / 500 hr | Includes Particle Count to monitor fluid cleanliness levels. |
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| Fluids | New unused oil | MOB 1 | every bulk shipment | Establish baseline for your bulk oil shipments. |
| | Coolant | COOL | 12 mon / 3000 hr | Test the condition of your coolant. |
| | Fuel | FUEL | every bulk shipment | Test your bulk fuel shipments for contaminants and to verify fuel grade. |
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| Special Sampling Considerations |
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| Follow up on abnormal samples | FILTER | WearCheck advises that filter analysis be performed with resamples on equipment that tested abnormal. Filter analysis allows the diagnostician to locate and detect major wear situations. Filter analysis can be performed on any equipment that has a replaceable filter. |
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| Extended oil drain interval testing | MOB 2 | Any equipment that is undergoing extended oil drain interval testing should use MOB 2 test kits. These kits include TAN testing to monitor the degradation of the oil, as well as the build up of acids in the oil. Oils with high TAN levels generally experience oil thickening, sludging, improper oil flow, and corrosion of components. |
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| Samples for warranty claims | INS | The MOB 1 and MOB 2 kits are not meant for this purpose. The insurance (INS) test kit provides a complete analysis of the oil and filter. This allows WearCheck to assess the condition of the equipment, and of the fluid prior to the failure. A report is issued, specifically aimed towards validation or invalidation of a claim. |
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| Large Diesel Engines | MOB 3 | WearCheck advises using MOB 3 kits for large engines (>100 litres of oil capacity). MOB 3 kits include the most comprehensive battery of tests to monitor the oil condition, wear condition, and contamination levels of the system. |
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