DONALDSON COMPANY SELECTED TO ASSIST DOUSMAN TRANSPORT REDUCE SCHOOL BUS EMISSIONS

MINNEAPOLIS, (Oct. 19, 2005) – Donaldson Company, Inc., a leading manufacturer of filter systems and replacement parts announced today that Dousman Transport Co., Inc., a privately-owned Wisconsin school bus company, selected Donaldson to provide emission reduction equipment and technical support to retrofit 22 school buses. The Donaldson Diesel Oxidation Catalyst (DOC) and Spiracle Closed Crankcase Ventilation filtration systems (CCV) were used by Dousman to complete the project.

Dousman Transport received $23,000 as part of the National School Transportation Association (NSTA) Clean School Bus grant program to retrofit 20% or the company's fleet. The grant, which is part of the Environmental Protection Agency's Clean School Bus program, was to be used to retrofit post-1990 buses with emission controls comparable to newer buses. The installation of the Donaldson DOC in 14 buses will reduce emissions by at least 15-30% and the DOC / CCV installation in the remaining 8 buses will see an emissions reduction as high as 30-50%.

"We chose the Donaldson solutions based on our research of available products in the marketplace and our familiarity with other Donaldson products used in our operations," said Robert Nelson, president of Dousman Transport. "Donaldson's reputation and EPA approved products are well-known and respected. Their engineers worked hand-in-hand with our team to meet our targeted emissions reduction requirements."

To learn more about the Donaldson DOC / CCV solutions, contact Donaldson Company at 952-887-3725 or visit the company's website at www.donaldsonexhaust.com.

About Dousman Transport
In business since 1962, Dousman Transport operates a fleet of 100 buses which transport approximately 10,000 students daily in the Waukesha County School district. The company employs approximately 120 personnel. To learn more about Dousman Transport call 262-965-2214 or write to 313 South Main Street, Dousman, WI 53118.

About Donaldson Company, Inc.
Donaldson is a leading worldwide provider of filtration systems and replacement parts. Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development. Donaldson serves customers in the diesel engine and industrial markets including in-plant air cleaning, compressed air and gas purification, power generation, disk drive filtration, off-road equipment and trucks. Our 11,000 employees contribute to the company's success at over 30 manufacturing locations around the world. Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the NYSE under the symbol DCI. Additional company information is available at www.donaldson.com.

FOR FURTHER INFORMATION:
Janice Kovala (952) 703-4552
jkovala@mail.donaldson.com