Exhibit 24

                            DIRECTORS AND OFFICERS OF
                           PARKER-HANNIFIN CORPORATION

                       REGISTRATION STATEMENT ON FORM S-4

                                POWER OF ATTORNEY

         The undersigned directors and officers of Parker-Hannifin Corporation,
an Ohio corporation (the "CORPORATION"), do hereby constitute and appoint, Duane
E. Collins, Michael J. Hiemstra, Timothy K. Pistell, Thomas A. Piraino, Thomas
C. Daniels and Patrick J. Leddy and each of them, with full power of
substitution and resubstitution, as attorneys-in-fact or attorney-in-fact of the
undersigned, for him/her and in his/her name, place and stead, to execute and
file with the Securities and Exchange Commission (the "COMMISSION") under the
Securities Act of 1933 a Registration Statement on Form S-4 relating to the
registration of shares of common stock of the Corporation to be issued in
connection with the merger of Commercial Intertech Corp. into the Corporation
(the "SECURITIES"), with any and all amendments, supplements and exhibits
thereto (including pre-effective and post-effective amendments or supplements),
to execute and file any and all applications or other documents to be filed with
the Commission and all documents required to be filed with any state securities
regulating board or commission pertaining to such Securities registered pursuant
to the Registration Statement on Form S-4, with any and all amendments,
supplements and exhibits thereto, each such attorney to have full power to act
with or without the others, and to have full power and authority to do and
perform, in the name and on behalf of the undersigned, every act whatsoever
necessary, advisable or appropriate to be done in the premises as fully and to
all intents and purposes as the undersigned might or could do in person, hereby
ratifying and approving the act of said attorneys and any of them and any such
substitute.

         EXECUTED as of February 8, 2000.


/s/ Duane E. Collins                        /s/ John G. Breen
- -----------------------------------         ------------------------------
Duane E. Collins, Chairman and              John G. Breen, Director
Chief Executive Officer

                                            /s/ Paul C. Ely, Jr.
                                            ------------------------------
 /s/ Michael J. Hiemstra                    Paul C. Ely, Jr., Director
- -----------------------------------
Michael J. Hiemstra, Vice-President -
Finance and Administration, Chief
Financial Officer                           /s/ Peter W. Likins
                                            ------------------------------
                                            Peter W. Likins, Director

/s/ Dana A. Dennis
- -----------------------------------
Dana A. Dennis, Controller                  /s/ Giulio Mazzalupi
                                            ------------------------------
                                            Giulio Mazzalupi, Director

/s/ Donald E. Washkewicz
- ------------------------------
Donald E. Washkewicz                        /s/ Klaus-Peter Muller
President, Chief Operating Officer          ------------------------------
and Director                                Klaus-Peter Muller, Director



                                     /s/ Hector R. Ortino
                                     -------------------------------
                                     Hector R. Ortino, Director



                                     /s/ Allan L. Rayfield
                                     -------------------------------
                                     Allan L. Rayfield, Director



                                     /s/ Wolfgang R. Schmitt
                                     -------------------------------
                                     Wolfgang R. Schmitt, Director



                                     /s/ Debra L. Starnes
                                     -------------------------------
                                     Debra L. Starnes, Director



                                     /s/ Dennis W. Sullivan
                                     -------------------------------
                                     Dennis W. Sullivan, Director






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