Donaldson Company Names John P. Wiehoff to Board of Directors

MINNEAPOLIS--July 25, 2003--Donaldson Company, Inc. , today announced that it has appointed John P. Wiehoff to its board of directors, effective immediately. Wiehoff will serve on the corporate governance and audit committees.

Wiehoff, 41, is chief executive officer of Minneapolis-based C. H. Robinson Worldwide, Inc. , a $3.3 billion global provider of multimodal transportation services and logistics solutions, with offices in North America, South America, Europe and Asia. Wiehoff joined C. H. Robinson in 1992 as controller, and was named vice president and chief financial officer in June 1998. In November 1998, he was promoted to senior vice president and chief financial officer, and was named president in December 1999. He was named chief executive officer in May 20, 200302.

"John's distinguished financial background allows him to serve as the financial expert on our already strong board," said Bill Van Dyke, chairman, president and chief executive officer of Donaldson Company, Inc. "In addition, John's global logistics and transportation management expertise will provide valuable counsel for our Engine Systems and Parts business. I am delighted to have him join our board."

Prior to joining C. H. Robinson, Wiehoff was an auditor with Arthur Andersen from 1984 through 1992. Wiehoff graduated from St. John's University, Collegeville, Minnesota, in 1984 with degrees in accounting and political science, and obtained his CPA license in 1986.

Wiehoff is replacing Paul B. Burke, retired chairman, president and chief executive officer of BMC Industries, Inc., who retired from the Donaldson board at the conclusion of today's meeting.

About Donaldson Company, Inc.

Donaldson Company, Inc., headquartered in Minneapolis, is a leading worldwide provider of filtration systems and replacement parts. Founded in 1915, Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development. Donaldson serves customers in the industrial and engine markets including dust collection, power generation, specialty filtration, compressed air purification, off-road equipment, industrial compressors, and trucks. More than 8,500 employees contribute to the company's success at 40 manufacturing locations around the world. In fiscal year 2002, Donaldson reported sales of more than $1.1 billion and achieved its 13th consecutive year of double-digit earnings growth. Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the New York Stock Exchange under the symbol DCI. Additional company information is available at www.donaldson.com.