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        <p>The Federal Motor Carrier Safety Regulations require carriers to establish a systematic inspection, lubrication, and maintenance program, and to maintain records to prove that the program is indeed systematic. However, the regulations do not specify the "checklist and schedules" that are required, as that is left up to the carrier. The carrier can establish their own inspection, lubrication, and maintenance schedules and checklists.</p>
        <p>Preventive maintenance (PM) schedules and checklists are generally established by the carrier based on the original equipment manufacturer's (OEM) recommendations. The carrier normally reviews the OEM's recommended inspection, lubrication, and maintenance intervals, and bases their schedules on them. Once the schedules are established, it is simply a matter of documenting the schedules, performing the inspections and maintenance on time, and documenting the maintenance and any repairs.</p>
        <p>Typical maintenance programs involve the use of a designation system to identify and describe preventive inspection and maintenance schedules. Here is an example of a typical schedule:</p>
        <ul>
            <li>PM A is also known as a "maintenance check-out." It involves a safety check of the vehicle and lubrication and inspection of "high wear" parts or components (brakes, belts, drive shaft, etc.) based on OEM recommendations. This is typically done at roughly half of the oil change interval. However, some carriers will use an inspection lane to perform a PM A on all vehicles entering the terminal.</li>
            <li>PM B involves everything done in a PM A plus an oil change and full lubrication (and any other fluid that is due for change) as well as a more in-depth inspection. Interval is set by OEM's recommendations (usually based on mileage, engine run hours, or time, depending on vehicle application).</li>
            <li>PM C is an "annual service." This service involves conducting a full periodic (annual) inspection as required by §396.17 as well as replacement of wear items as recommended by the OEM. A PM C must be done within 12 months of the previous PM C (new vehicle must have a periodic inspection before going into service).</li>
            <li>PM D is typically used to indicate a specialized service (summarization, winterization, and scheduled component rebuild are examples of PM D).</li>
            <li>Companies continue the lettering system based on their needs. Some companies go as far as PM L.</li>
        </ul>
        <p>Remember, these are preventive maintenance inspections. They are not to be confused or combined with the driver's daily inspection requirements.</p>
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