Catalyst - Change Procedures For Dual Bed CAT

Number 84-6 (Gasoline)-82 Date 2/85


Subject: CATALYST CHANGE PROCEDURES ON VEHICLES EQUIPPED WITH DUAL BED CONVERTERS

YEARS AFFECTED: 1981-1984


Comments have been received expressing concerns about the health effects of dust produced when servicing the catalyst in vehicles equipped with Dual Bed Converters. (Campaign Numbers 82-C-10, 81-C-12, 81-C-13, 82-C-9) (Bulletin Numbers 81-T-60A, 82-I-235, 82-T-89, 82-T-97, 81-T-70).

Several studies have been undertaken to review this matter. The studies showed that catalytic converters can be serviced safely because very little, if any, dust is produced if the procedural steps are followed when replacing the catalyst. These studies also showed levels of lead and other metals were well under the safe limits. Therefore, it is recommended that prior to bead removal, personnel review the appropriate service and/or campaign bulletin, allow the catalytic converter to cool, add water to the outlet end of the converter, and put on a suitable dust mask, rubber gloves and safety glasses. Specifically important is the step requiring the addition of 16 oz. of water to the outlet end of the converter prior to bead removal.