Safety - Section 22 OM2228 Page 22-8 Warnings and Cautions The lubrication chart is located on the right-hand side of the radiator grille. The chart specifies some of the critical maintenance items to be checked. Component location and service intervals are specified on the chart. The lube key lists the proper lubricants to be used. Refer to Section 40, Lubrication and Service, for more information on maintenance items.