Donaldson retrofits mufflers for reduced emissions

| 1/18/2002

In the latest example of their commitment to reducing heavy-duty diesel engine emissions, Donaldson Co. Inc. recently introduced its first installation of retrofit catalytic converter mufflers (CCM) in conjunction with Northeast States for Coordinated Air Use Management.

The mufflers were developed in partnership with Mack Trucks Inc. and were installed on Mack MR and LE model vehicles owned by Waste Management Inc. at their Woburn, MA, location.

Donaldson, headquartered in Minneapolis, integrated a Mack-specified diesel oxidate catalist (DOC) into a 10-inch diameter converter muffler, making the CCM a direct replacement for the standard heavy-duty exhaust muffler. Donaldson's patented CCM designs will become part of a new line of retrofit DOC products being developed and marketed independents by Donaldson for emerging retrofit markets.

Following the successful installation, Donaldson received a commitment from Mack to build several hundred more retrofit units for installation on other Mack vehicles in Waste Management's fleet through the New England area.

For more information about Donaldson and its filtration systems and replacement parts, visit