EXHIBIT 24 DIRECTORS AND OFFICERS OF PARKER-HANNIFIN CORPORATION REGISTRATION STATEMENT ON FORM S-8 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each of the undersigned directors and officers of Parker-Hannifin Corporation, an Ohio corporation (the "Company"), hereby (1) constitutes and appoints Donald E. Washkewicz, Michael J. Hiemstra and Thomas A. Piraino, Jr., collectively and individually, as his or her agents and attorneys-in-fact with full power of substitution and resubstitution to (a) sign and file on his behalf and in his name, place and stead in any and all capacities (i) a Registration Statement on Form S-8 (the "Registration Statement") with respect to the registration under the Securities Act of 1933, as amended, of up to 112,500 shares of the Company's Common Stock, par value $.50 per share, for issuance under the Company's Non-Employee Directors' Stock Plan, (ii) any and all amendments, including post-effective amendments, and exhibits to the Registration Statement and (iii) any and all applications or other documents to be filed with the Securities and Exchange Commission or any state securities commission or other regulatory authority with respect to the securities covered by the Registration Statement and (b) do and perform any and all other acts and deeds whatsoever that may be necessary or required in the premises and (2) ratifies and approves any and all actions that may be taken pursuant hereto by any of the above-named agents and attorneys-in-fact or their substitutes. IN WITNESS WHEREOF, the undersigned directors and officers of the Company have hereunto set their hands this 30th day of January, 2003. /s/ Duane E. Collins /s/ Giulio Mazzalupi Duane E. Collins, Chairman of the Board Giulio Mazzalupi, Director /s/ D. E. Washkewicz /s/ K. P. Muller Donald E. Washkewicz, Chief Executive Officer Klaus-Peter Muller, Director and Director /s/ Candy M. Obourn Candy M. Obourn, Director /s/ M. J. Hiemstra Michael J. Hiemstra, Principal Financial Officer /s/ Hector R. Ortino Hector R. Ortino, Director /s/ Dana A. Dennis Dana A. Dennis, Principal Accounting Officer /s/ Allan L. Rayfield Allan L. Rayfield, Director /s/ John G. Breen John G. Breen, Director /s/ Wolfgang R. Schmitt /s/ W. E. Kassling Wolfgang R. Schmitt, Director William E. Kassling, Director /s/ Debra L. Starnes Debra L. Starnes, Director /s/ R. J. Kohlhepp Robert J. Kohlhepp, Director /s/ D. W. Sullivan /s/ Peter W. Likins Dennis W. Sullivan, Director Peter W. Likins, Director