“A” Service: grease the fifth wheel platform, change the filters and top off the fluids; “B” Service (AKA “the big one”): oil change, filter change, replace tires if needed, replace brake shoes if needed, etc.; and “C” Service: the federal inspection which must be done annually. Money saving tip: Preventive maintenance can help truck drivers avoid costly service calls, such as this driver had to make. In addition to the mechanic’s time, the driver (or his/her company) may have had to pay for the service truck’s mileage and any products used during the repair. These costs can really add up. Some breakdowns can be completely avoided by practicing regular preventive maintenance.