Determining Scheduled Maintenance Intervals

Performing regular maintenance will help ensure that your vehicle delivers safe, reliable service, and optimum performance. A proper maintenance program will also help to minimize downtime and safeguard warranties.

To determine the correct maintenance intervals for your vehicle, you must first determine the type of service or conditions the vehicle will be operating in. Most vehicles operate in conditions that fall within one of two schedules. Before placing your vehicle in service, determine whether schedule I or II applies to your vehicle.

Schedules I and II

 Schedule I (urban transport) applies to vehicles that travel up to 20,000 miles (32 000 kilometers) annually. Examples of Schedule I usage are:

• frequent short-distance travel

• operation primarily in cities and densely populated areas

• local transport with infrequent freeway travel

• high percentage of stop-and-go travel

 Schedule II (rural transport) applies to vehicles that travel over 20,000 miles (32 000 kilometers) annually. An example of Schedule II usage is:

• less frequent stop-and-go travel

Maintenance Schedules

After determining the schedule appropriate to your vehicle, refer to the  to determine when to perform the Initial Maintenance (IM) and the frequency of performing subsequent maintenance intervals for each schedule.

Maintenance Intervals

Refer to the  to determine which maintenance interval(s) should be performed when your vehicle reaches the mileage or months of operation listed in these subjects.

Before placing your new vehicle in service, determine the maintenance schedule (Schedule I or II) that applies to your intended use of the vehicle. Once a schedule is choosen, continue using it for the life of the vehicle.

Maintenance Operations

Groups 01 through 83 in this manual have an index at the beginning of each Group. The index lists the Title of Maintenance Operations and the Maintenance Operation (MOP) Numbers for that Group. Follow the instructions under the MOP number to perform the required maintenance.

In addition to the maintenance operations required for the maintenance interval, perform all of the pre- and post-trip inspections and maintenance procedures in Chapter 12 and Chapter 13 , 'Pre- and Post-Trip Checklists' and 'Pre- and Post-Trip Inspections and Maintenance,' in the S2 Chassis Operator's Manual .