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