Exhibit 24




                           DIRECTORS AND OFFICERS OF
                          PARKER-HANNIFIN CORPORATION

                           REGISTRATION STATEMENT(S)
                               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 or registration statements
(on Form S-3, Form S-4, Form S-8 or any other appropriate form) with respect to
the issuance of common shares, par value $.50 per share, of the Corporation
(including the related common stock purchase rights) 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 or registration statements, 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 April 6, 2000.


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


/s/ MICHAEL J. HIEMSTRA                               /s/ PAUL C. ELY, JR.
- -----------------------------                         -----------------------
Michael J. Hiemstra, Vice-President-                  Paul C. Ely, Jr., Director
Finance and Administration, Chief Financial
Officer


/s/ DANA A. DENNIS                                    _______________________
- -----------------------------                         Peter W. Likins, Director
Dana A. Dennis, Controller


/s/ DONALD E. WASHKEWICZ                              /s/ GIULIO MAZZALUPI
- -----------------------------                         -----------------------
Donald E. Washkewicz                                  Giulio Mazzalupi, Director
President, Chief Operating Officer and Director

                                                                               2



                                       /s/ KLAUS-PETER MULLER
                                       ---------------------------
                                       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